Eixo da tomada de força (PTO) para segadoras de discos New Holland 1409, 1410, 1411, 1412, 1441 e 1442.

Reliable PTO Shaft for New Holland Discbine Models

PTO Shaft for New Holland Discbine Model: 1409, 1410, 1411, 1412, 1441, 1442 Disc Mower

The PTO shaft for New Holland Discbine 1409, 1410, 1411, 1412, 1441, and 1442 disc mower-conditioners is the critical mechanical link between your tractor's power output and the cutterbar's high-speed disc modules. These Discbine models carry 7 to 12 individual disc modules spinning at 3,000 rpm across cutting widths from 9 ft 2 in up to 15 ft 7 in, demanding a tractor PTO shaft capable of transmitting substantial torque reliably under the wide angular deflections inherent in offset and center-pivot tongue configurations. CMN Transmission's solution is built around a CAT 6 Constant Velocity main shaft that absorbs angular deflection without vibration or cyclic speed variation, paired with a Category 5 Double CV PTO driveline shaft secondary assembly for the Discbine's internal drive requirements. This combination is especially critical for the bent-tongue Models 1411 and 1412 and the swivel-hitch Models 1441 and 1442, where the disc mower PTO shaft must function smoothly at significant working angles during every headland turn and across rolling or sloped terrain. Whether you farm on flat plains or challenging hill country, this PTO drive shaft for discbine delivers consistent, uninterrupted power transfer through every cut.

Designed as a precision direct-fit replacement for OEM and aftermarket PTO shaft parts, this PTO driveline shaft for disc mower is manufactured from high-grade alloy steel with advanced CNC machining, induction hardening, and balanced assembly techniques. The FNT34 Combination Clutch provides dual overload protection through integrated friction-slip and overrunning mechanisms, guarding both the tractor drivetrain and the expensive Discbine cutterbar gearbox from shock loads and flywheel back-torque. Available in standard 1.375-21 spline implement configurations and accommodating either 1.375-6 or 1.750-20 tractor yoke splines, this heavy duty PTO shaft is a reliable, cost-effective alternative to OEM parts. ISO 9001, CE, and TS16949 certified, it serves dairy, hay, silage, and forage operations across six continents. Whether you are running a 540 PTO shaft configuration on a mid-horsepower tractor or a 1000 PTO shaft setup on a high-horsepower unit, this shaft is engineered to deliver season-long reliability with reduced maintenance cost and factory-direct value pricing that eliminates dealer markups on tractor PTO shafts.

Eixo principal: CAT 6 Velocidade constante

Implement input shaft is usually 1.375-21 spline. Many models come equipped with CAT4 PTO. We recommend CAT6 for improved life. Often these PTO are short (36" OAL). Beware over-turning!

Secondary PTO Shaft: Category 5 Double CV

Our recommended replacement: Category 5 Double CV

Many, but not all Discbine secondary shafts are a double CV with combination clutch

FNT34 Combination Clutch (Friction and Overrunning)

Especificações técnicas

* Custom PTO shaft dimensions, non-standard spline configurations, and OEM orders available on request. Contact our technical team for confirmation of exact PTO shaft sizes for your tractor-implement combination.

Features of PTO Drive Shaft for New Holland Discbine

1. CAT 6 Constant Velocity Main Shaft
The CAT 6 CV joint technology ensures smooth, vibration-free power transmission even when the Discbine operates at significant working angles. Unlike standard universal joints that produce sinusoidal speed fluctuations at angle, the CV joint maintains perfectly constant rotational speed throughout each revolution. This eliminates the cyclic torque spikes that cause premature wear in PTO shaft u joint bearings and accelerate fatigue in the cutterbar's input gearbox, extending overall drivetrain service life and reducing costly unplanned downtime during the critical hay harvest window.

2. FNT34 Combination Clutch Protection
The FNT34 Combination Clutch integrates both a friction slip element and an overrunning clutch into a single compact unit. The friction component protects against sudden torque surges when the cutterbar strikes rocks or buried debris, absorbing the shock energy before it reaches the implement gearbox. Simultaneously, the overrunning function prevents the inertia of the spinning disc cutterbar from back-driving the tractor's PTO system during deceleration, protecting the tractor gearbox from reverse-torque damage. This dual protection mechanism is essential for any slip clutch PTO shaft application in demanding field conditions.

3. Category 5 Double CV Secondary Shaft
The secondary shaft uses a Category 5 Double CV configuration specifically engineered for the high-articulation demands of the Discbine's offset and center-pivot tongue geometries. A double CV joint assembly allows this PTO shaft for discbine secondary drive to operate through a wide range of angles without generating vibration, reducing stress concentration at the PTO shaft yoke connections and the implement input gearbox housing. This is particularly important for the Models 1441 and 1442, which feature a swivel-hitch center-pivot tongue that creates dynamic angular changes throughout each operating pass and during headland turns.

4. Direct-Fit Spline Compatibility
Engineered to precisely match the 1.375-21 spline implement input standard used across all six Discbine models in this range. Tractor-end PTO shaft yoke options include the 1.375-6 spline for standard 540 PTO shaft applications and the 1.750-20 spline for higher-horsepower 1000 rpm PTO shaft configurations. This eliminates the need for a PTO shaft adapter in the vast majority of standard tractor-implement pairings, ensuring a clean, direct connection that minimizes angular runout and maximizes torque transmission efficiency from the tractor PTO stub shaft to the Discbine input.

5. Precision CNC Manufacturing and Heat Treatment
Every component of this agricultural PTO shaft is produced using CNC precision machining processes followed by induction hardening and controlled tempering. This manufacturing approach ensures consistent PTO shaft dimensions and tight tolerances across every unit, critical for proper CV joint operation and balanced rotation at operating PTO speeds. Advanced heat treatment achieves high surface hardness at the spline and journal contact points while maintaining core toughness, resulting in resistance to both wear and impact fracture that is essential for the demanding, high-cycle loading characteristic of commercial disc mower operation.

6. CE-Compliant Full Telescoping PTO Shaft Guard
The included PTO shaft guard is a full-length, telescoping plastic assembly compliant with CE and OSHA operator safety standards. The PTO shaft cover is constructed from UV-stabilized high-impact polymer to resist cracking and brittleness even after extended outdoor service. Integrated bearing rings allow the outer guard tube to remain stationary while the shaft rotates inside it, eliminating operator entanglement risk. Guard retention chains are included at both ends for secure attachment to the tractor and implement frames. A damaged or missing PTO shaft guard is a critical safety hazard and this component must always be in place during operation.

Working Principle of PTO Shaft for Disc Mower

1. Power Input and Tractor Connection
When the tractor's PTO lever is engaged, the rear output stub shaft begins rotating at either 540 rpm (for a standard 540 PTO shaft application) or 1000 rpm (for a 1000 rpm PTO shaft high-horsepower configuration). The tractor-end PTO shaft yoke, splined to either 1.375-6 or 1.750-20 depending on the tractor's PTO specification, locks onto this stub shaft via a spring-loaded locking pin. This mechanical coupling transmits full tractor PTO torque into the PTO drive shaft body, initiating rotation that travels through the entire driveline toward the Discbine.

2. CAT 6 Constant Velocity Joint Operation
The core technology of this discbine PTO shaft is the CAT 6 Constant Velocity joint. A conventional Cardan (cross-and-bearing) PTO shaft universal joint produces a sinusoidal speed variation when operating at any angle, with two speed peaks and two speed troughs per revolution. At the typical operating angles of the New Holland Discbine's offset and center-pivot tongue configurations, this variation can generate significant vibration, noise, and accelerated wear at every joint and bearing along the driveline. The CAT 6 CV joint eliminates this effect entirely by using a centering ball-and-socket mechanism that maintains identical input and output rotational speeds regardless of the operating angle. The result is perfectly smooth, vibration-free torque transmission at all Discbine working positions, reducing wear on the PTO shaft u joint bearing assemblies and extending the service life of the Discbine's internal cutterbar gearboxes by reducing the cyclic load reversals that cause fatigue cracks in gear teeth and shaft journals.

3. Telescoping PTO Shaft Tube Mechanism
The outer and inner PTO shaft tube sections are produced in a profiled cross-section (lemon or star profile) that allows the inner PTO shaft tubing to slide freely inside the outer while continuing to transmit full torque through the interlocking profile. As the Discbine header rises and falls over field terrain, and as the tongue pivots during headland turns, the effective distance between the tractor PTO output and the Discbine input changes continuously. The telescoping PTO shaft tube accommodates this length change fluidly while the CV and Cardan joints simultaneously accommodate angular changes. Operators must verify that the correct PTO shaft length is selected so that the shaft never reaches its mechanical minimum or maximum travel limit during any field operation, as bottoming out or full extension will cause shaft separation or structural damage.

4. FNT34 Combination Clutch: Shock and Back-Torque Protection
Positioned at the implement-input end of the PTO driveline shaft, the FNT34 Combination Clutch fulfills two essential protection roles simultaneously. During normal operation, it transmits full torque rigidly with no slippage. When the disc cutterbar encounters a sudden obstruction such as a buried rock, embedded fence post, or hard soil mound, the friction element of this PTO shaft with slip clutch slips, absorbing the instantaneous shock energy rather than transmitting it as a destructive torque spike into the Discbine's expensive modular gearbox system. The slip torque threshold is factory-set to activate before gear tooth breakage occurs. The overrunning element functions during deceleration and PTO disengagement. The New Holland Discbine's heavy rotating disc and conditioning system carries significant rotational inertia, and without overrunning protection this flywheel mass would transmit reverse torque back through the tractor PTO shaft into the tractor's gearbox and PTO brake system. The overrunning clutch allows the implement to coast freely to a stop independently of the tractor drivetrain, preventing back-torque damage in all deceleration scenarios.

5. Secondary Double CV Shaft and Guard System
The Category 5 Double CV secondary agricultural PTO shaft handles power distribution within the Discbine's internal driveline from the primary input gearbox to the cutterbar input, accommodating the wide angular range demanded by the machine's conditioning roll drive and cutterbar geometry on sloping or uneven terrain. The full-length PTO shaft guard assembly rotates freely on bearing rings around the spinning shaft, remaining stationary while the driveline turns at high speed inside it. Guard retention chains fix both ends of the guard to the tractor and implement frames, preventing rotation. This system complies fully with CE Machinery Directive guarding requirements and is essential for safe operation around the rapidly rotating PTO drive shafts of the Discbine system.

Cenários de aplicação

1. Forage Harvesting
Mowing high-value crops including alfalfa, red clover, and perennial ryegrass at the correct growth stage is essential to maximize nutritional content for livestock feed. The Discbine's precision cutting action relies on a stable, constant-speed PTO drive shaft input to maintain uniform disc speed at 3,000 rpm across all cutting modules simultaneously. Variations in PTO shaft speed caused by a worn or vibrating tractor PTO shaft result in uneven stubble height, leaf shatter losses, and reduced digestible protein content in the harvested forage, directly impacting livestock performance and farm profitability.

2. Hay Harvesting
The primary application for this disc mower PTO shaft. The Discbine cuts grasses and legumes at field speeds up to 9 mph, forming windrows or swaths for field drying. The integrated conditioning rolls crimp and crack plant stems along their full length to accelerate moisture loss before baling, and this entire process depends on the uninterrupted, smooth torque delivery of a reliable PTO shaft for disc mower. Any vibration or torque variation at the PTO driveline level directly impacts the consistency of the cut and conditioning quality of the finished windrow.

3. Silage Production
Cutting crops at higher moisture levels for fermented silage storage in bunkers, pits, or wrapped bales requires fast, even cutting to ensure uniform crop length and consistent fermentation quality throughout the clamp. The PTO shaft for New Holland discbine must deliver steady power to maintain consistent disc tip speed and cutter bar module synchronization throughout high-yield, high-density silage crop conditions. Inconsistent drive input from a worn or improperly specified PTO driveline shaft leads to uneven cut lengths and variable moisture content, creating fermentation quality issues that can compromise the entire silage clamp.

4. Manejo de Pastagens
Topping and trimming pastures to control rank or stemmy growth, remove unwanted weeds and thistles, and encourage fresh palatable re-growth for grazing animals is a high-cycle, lower-intensity application well suited to the Discbine's mowing system. This is a common secondary application for the Discbine on mixed livestock farms, and the PTO shaft with slip clutch combination clutch protection is particularly valuable when mowing established pastures where hidden rocks, roots, and hard terrain features are common obstacles that would otherwise cause gearbox damage without the friction slip protection of the FNT34 clutch assembly on this agricultural PTO shaft.

5. Roadside and Specialty Mowing
Maintaining roadsides, drainage ditches, airport buffer strips, and conservation headlands where a clean, controlled cut is required in irregular or environmentally sensitive areas represents a specialist application that benefits from the Discbine's precise height control and the Discbine's narrow-to-wide model range. In these applications the PTO drive shaft for discbine must tolerate frequent direction changes, tight headland turns, and the angular demands of banking or slope-side cutting. The CAT 6 CV joint design of this PTO shaft tractor to implement connection is especially valuable in these high-angle, high-cycle mowing scenarios where a conventional Cardan shaft would generate excessive vibration.

6. Cover Crop Termination
Cutting down winter cover crops such as cereal rye, vetch, or hairy oats ahead of planting season allows the biomass to be laid down as a protective mulch layer that suppresses weed emergence and protects soil structure. The Discbine provides a clean, precise cut height that leaves the stubble at the correct height for effective mulching without soil disturbance. The heavy duty PTO shaft from CMN Transmission ensures reliable power transmission through the often-dense, lodged, or frost-damaged biomass characteristic of overwintered cover crop stands, which can place intermittent high loads on the disc mower drivetrain throughout the termination operation.

Disc Mower PTO Shaft Installation Steps

Step 1: Ensure Full Machine Safety Before Beginning
Before fitting this eixo da tomada de força for disc mower, disengage the tractor PTO completely, reduce engine speed to idle, shut off the engine, remove the ignition key, and wait for all rotating components to come to a complete stop. Place the tractor in park with the parking brake fully applied. Ensure the Discbine is supported safely on level ground with no bystanders in the work area. Wear heavy leather gloves and safety glasses throughout the installation process, as the PTO shaft yoke and spline components have sharp edges that can cause cuts and abrasions if handled carelessly.

Step 2: Verify PTO Shaft Dimensions and Length
Before installation, couple the tractor and Discbine together at the normal operating hitch setting and measure the actual center-to-center distance between the tractor PTO output stub shaft and the Discbine input stub shaft with both units in the operating height position. Verify that the PTO shaft length allows a minimum of 1 in (25 mm) of overlap in the telescoping tubes at maximum extension and that the inner tube does not bottom out at minimum length. Note that the standard PTO shaft dimensions for these Discbine models are approximately 36 in OAL and the shaft is notably short. Beware of over-turning on tight headland maneuvers, which can overextend the shaft beyond its safe travel range.

Step 3: Confirm Spline Compatibility at Both Ends
Verify the tractor-end PTO shaft yoke spline matches your tractor's PTO output shaft specification. A 1.375-6 spline yoke suits standard 540 rpm tractors, while the 1.750-20 spline is for 1000 rpm high-horsepower tractors. Confirm the implement-end 1.375-21 spline yoke mates cleanly with the Discbine's input shaft. Never force a mismatched spline. If a PTO shaft adapter is genuinely required, confirm it is rated for the torque being transmitted before use. An incorrect adapter can fail catastrophically under load, creating a serious safety hazard to the operator and bystanders near the machine.

Step 4: Lubricate All Joints Before First Use
Apply EP2-grade lithium grease through all provided grease nipples on the CV joint, any Cardan joints, and the sliding yoke splines before the first operation. Apply a generous coat of grease along the full inner surface of the outer PTO shaft tube and the full outer surface of the inner tube before assembling the telescoping sections. Correct pre-lubrication before first use is one of the most important steps in maximizing the service life of the PTO shaft u joint bearing assemblies and the telescoping PTO shaft tubing. Failure to lubricate at installation will cause premature spline wear and joint seizure within the first hours of operation.

Step 5: Fit and Secure the Shaft and Guard Assembly
Slide the tractor-end yoke onto the tractor PTO stub shaft, aligning the splines, and push firmly until the spring-loaded locking pin clicks into the groove on the PTO stub shaft. Attach the implement end to the Discbine input shaft in the same manner. Once both ends are seated and locked, attach the guard retention chain or strap from the tractor-end PTO shaft cover to a fixed point on the tractor chassis, and the implement-end chain to the Discbine frame. These chains must be attached to prevent the PTO shaft guard from spinning with the shaft. Never operate the Discbine with the guard removed, missing, or damaged under any circumstances.

Step 6: No-Load Test and Final Inspection
With all guards secured and all bystanders well clear of the machine, start the tractor and engage the PTO at low engine speed with the Discbine header raised clear of the ground. Observe the shaft in operation from a safe distance, checking that the guard assembly remains stationary and that the shaft telescopes and articulates smoothly without binding or unusual noise. Gradually increase to the rated operating PTO speed and listen for any vibration, knocking, or resonance. If any abnormal noise, vibration, or resistance is detected, disengage the PTO immediately, shut down, and investigate before proceeding. Only proceed with field cutting after a satisfactory no-load run of at least 2 to 3 minutes confirms correct installation.

Dicas de manutenção

1. Regular Greasing (Every 8 Hours)
All CV joints, Cardan joints, and sliding PTO shaft yoke splines require greasing via the provided nipples every 8 hours of operation or at minimum once per day during peak seasonal use. Use only EP2-grade lithium-based grease approved for agricultural driveline components. Grease until fresh lubricant is seen emerging from the joint seals, confirming all bearing surfaces have been reached. This is the single most effective maintenance action for extending PTO shaft universal joint and CV joint service life in the abrasive, moisture-laden field environment.

2. Guard Inspection After Every Use
Inspect the PTO shaft cover and full-length guard assembly after each use for cracks, splits, impact deformation, or UV degradation that has caused the plastic to become brittle. Remove all trapped crop residue, soil, and debris from inside the guard to prevent binding against the rotating shaft. Confirm the bearing rings at each end of the guard allow the outer guard tube to rotate freely relative to the inner shaft body. A guard that binds or drags against the shaft will heat up, distort, and ultimately fail, exposing the operator to entanglement risk from the high-speed rotating PTO drive shaft.

3. Spline Wear Check (Monthly / Seasonal)
Periodically disconnect the shaft and inspect both the tractor-end and implement-end PTO shaft yoke splines for wear, fretting corrosion, or tooth deformation. Rocking the yoke by hand should reveal no perceptible angular play between the yoke and the stub shaft splines. Any detectable play indicates that spline wear has begun. Worn splines accelerate stress concentration at the CV joint and can cause the yoke to slip under peak torque, leading to sudden shaft disconnection under load. Replace worn yoke assemblies or complete shaft assemblies from CMN Transmission's PTO shaft parts range before the wear progresses to a safety-critical level.

4. Telescoping Tube Lubrication and Inspection
At least once per season, fully separate the telescoping PTO shaft tube sections, clean both inner and outer PTO shaft tubing surfaces with a dry cloth, remove any rust scale or contamination, and apply a fresh coat of EP2 grease along the full length of the inner tube profile before reassembling. Check the inner tube for any bending, denting, or surface corrosion that could cause binding or unbalanced rotation. Inspect the safety chain or cable that prevents the shaft from fully separating during field use and replace it if it shows signs of stretching, kinking, or corrosion. This chain is a critical retention safety device.

5. Friction Clutch Setting Verification
The FNT34 Combination Clutch friction element is spring-loaded to a factory-set slip torque specification. Verify annually that the clutch slip torque remains within the correct range by using a torque wrench test method or by observing clutch behavior during controlled testing: the clutch should not slip during normal mowing of standing grass crop but should slip cleanly when a sudden overload is applied. If the clutch slips under normal load, increase spring pressure or inspect friction discs for wear. If the clutch never slips even on hard impacts, suspect a seized or corroded friction element. Correct clutch function is critical for protection of this PTO shaft with slip clutch and the Discbine gearbox system it protects.

6. End-of-Season Storage Preparation
Before long-term storage, remove the agricultural PTO shaft from both tractor and implement, clean all external surfaces thoroughly with a dry brush, grease all joints and splines via the grease nipples, and coat the inner telescoping tube with a heavy layer of fresh grease to prevent seasonal corrosion. Store the shaft horizontally in a clean, dry location away from UV exposure and chemical contact. Inspect the guard assembly for any damage sustained during the season and order replacement guard sections or bearing rings before the next season begins. Replace any shear bolt PTO shaft shear elements that show corrosion or deformation to ensure correct protective function at season startup.

Common Troubleshooting of PTO Shaft for Discbine

1. Vibração excessiva durante a operação
Abnormal vibration felt through the tractor seat or steering wheel during Discbine operation is most commonly caused by the PTO shaft length being incorrect: either the telescoping tube is near fully extended or near fully compressed, causing the shaft to run out of its correct balance range. Also inspect for a bent PTO shaft tube, worn or seized PTO shaft u joint cross-and-bearing assemblies, or a loose yoke connection. A severely worn CV joint with excessive play in its centering mechanism will also produce vibration at operating speed. Disconnect and inspect all components before resuming field operation.

2. PTO Shaft Running Hot at CV Joint
Heat generation at the CV joint area during operation is a clear indicator of insufficient lubrication, severely worn joint bearings, or an operating angle that exceeds the rated maximum for the joint. First re-grease the CV joint through its nipple and run briefly to allow the grease to distribute. If overheating continues after greasing, inspect the CV joint centering ball and bearing races for wear or pitting. Verify the actual PTO shaft tractor to implement angle during field operation does not exceed the manufacturer's specified maximum angle for the CAT 6 CV configuration.

3. Clutch Slipping Under Normal Mowing Load
If the slip clutch PTO shaft friction element slips continuously during normal grass or alfalfa mowing without any impact event, the clutch spring pressure has likely decreased due to spring fatigue, or the friction disc material is worn below the minimum thickness specification. Disassemble the FNT34 clutch and measure friction disc thickness against the service manual limit. Inspect the spring stack height. Replace worn friction discs or springs and reset the clutch to the correct torque specification. Also check for oil contamination of the friction disc surface, which causes uncontrolled slip at much lower torque levels than the intended setting.

4. Clunking or Knocking During PTO Engagement
Clunking or knocking sounds at PTO engagement or during directional changes typically indicate worn splines in the PTO shaft yoke connections or worn PTO shaft universal joint cross-and-bearing assemblies with excessive angular play. Disconnect the shaft and manually check all joints for play by gripping adjacent yoke arms and attempting to flex them. Any detectable movement in a bearing cup relative to the journal cross indicates a worn joint. Worn PTO shaft parts at this level should be replaced promptly to prevent progressive component failure that could ultimately result in shaft disconnection under field load.

5. PTO Shaft Guard Rotating With the Shaft
If the PTO shaft guard is observed to rotate with the driveline shaft rather than remaining stationary, the bearing rings at one or both ends of the PTO shaft cover have failed, or the guard retention chains have detached from the tractor or implement frames. Stop operation immediately as a spinning guard presents a severe operator entanglement hazard. Do not resume operation until the bearing rings have been replaced and the retention chains are correctly re-attached to fixed frame points at both ends. Guard bearing ring replacement is a straightforward low-cost repair that must be treated as an urgent safety matter.

6. Shaft Difficult to Connect or Disconnect
Difficulty connecting the yoke to the tractor PTO stub shaft is most commonly caused by corrosion on the male or female spline surfaces, a damaged or weak spring-loaded locking pin, or misalignment between the tractor and Discbine caused by uneven ground during hitching. Clean and lightly oil the tractor PTO stub shaft splines, and inspect the locking pin for correct protrusion distance and spring force. Ensure the tractor and Discbine are on flat, level ground with the hitch fully aligned before attempting to connect. If the locking pin is damaged or weak, replace it from the PTO shaft parts catalog before field use.

Disc Mower PTO Shaft and Disc Mower Gearbox

The disc mower PTO shaft and the disc mower gearbox are two inseparable elements of the New Holland Discbine's complete drivetrain system. These two components work in series to transform the relatively low rotational speed of the tractor's PTO output (540 or 1000 rpm) into the high-speed, high-torque output required to spin each individual cutting disc at approximately 3,000 rpm. Neither component can function correctly without the other, and the health of one directly affects the service life of the other.

A disc mower gearbox is a heavy-duty sealed bevel or helical gear transmission that receives rotary power from the PTO driveline shaft and converts it into the high-speed rotary output required by the Discbine's cutting system. In the New Holland Discbine's modular cutterbar design, there are two distinct gearbox levels: the primary input gearbox at the machine end of the main PTO drive shaft, which distributes power to the conditioning rolls and the cutterbar series; and the individual disc module gear cases within the cutterbar beam itself, each of which is an independently sealed gear housing with its own hardened alloy drive shaft connecting it to the next module in the series. Each module's gear case steps the shaft speed up to the final 3,000 rpm disc cutting velocity. The precision-forged gears in these disc modules are the direct recipients of every torque load that the tractor PTO shaft introduces into the system, making the quality and condition of the PTO shaft absolutely fundamental to gearbox longevity.

The torque path begins at the tractor PTO output and travels through the main agricultural PTO shaft via its CV joint and telescoping tube to the Discbine primary input gearbox. This gearbox splits power to both the conditioning rolls and the secondary PTO driveline shaft that drives the cutterbar entry point. From there, each disc module's sealed gear case transmits and multiplies speed along the cutterbar chain. At every stage of this power path, the quality of the PTO shaft for New Holland discbine determines the smoothness, consistency, and safety of the torque being delivered. A worn or vibrating PTO shaft introduces cyclic torque variations and shock pulses that fatigue gear teeth, crack bearing races, and ultimately cause premature module failure. The FNT34 Combination Clutch on the PTO shaft with slip clutch acts as the critical buffer between all tractor-side disturbances and the expensive disc gearbox series.

When replacing either the disc mower PTO shaft or the disc mower gearbox, it is best practice to inspect both components simultaneously. A new PTO drive shaft for discbine fitted to a worn or damaged input gearbox will experience accelerated wear because the gearbox's worn input bearing creates runout and vibration that loads the new shaft's CV joint unevenly. Conversely, a rebuilt or new disc gearbox connected to an old, worn heavy duty PTO shaft with worn Cardan joints will not achieve its rated service life because the vibration from the worn shaft introduces fatigue loads into the new gear teeth from day one. CMN Transmission supplies both disc mower PTO shafts and disc mower gearboxes for the New Holland Discbine 1409 to 1442 series from a single integrated manufacturing source, allowing operators to source fully compatible, dimensionally verified components from one trusted supplier with complete technical support from pre-sale specification through to after-sales service.

Por que escolher os eixos de tomada de força (PTO) agrícolas da CMN Transmission?

CMN Transmission (Korea) stands as one of the world's leading suppliers of industrial and agricultural power transmission solutions, with a product range spanning PTO drive shafts, agricultural gearboxes, hydraulic cylinders, planetary gearboxes, worm gearboxes, bevel gears, chain sprockets, chains, gear racks, pulleys, taper bushes, couplings, and more. Headquartered in Ansan-si, Gyeonggi-do, Korea, with a production base and over 10 shareholding cooperative factories, CMN maintains an inventory of more than 150,000 standard stock products and serves customers in over 53 countries across North America, Europe, South America, the Middle East, Africa, Southeast Asia, and Oceania.

What sets CMN Transmission apart in the agricultural PTO shaft market is a commitment to factory-direct pricing without sacrificing quality. As an integrated manufacturing and trading company, CMN eliminates the multiple dealer markups that inflate the cost of OEM replacement parts. Every tractor PTO shaft produced is manufactured using advanced CAD design, precision CNC machining, modern heat treatment processes, and rigorous multi-stage quality testing before dispatch. CMN's products carry ISO 9001, CE, and TS16949 certifications, ensuring compliance with international safety and performance standards across all agricultural and industrial markets. The TS16949 automotive-grade quality management certification in particular demonstrates the level of process discipline and manufacturing precision applied to every PTO driveline shaft that leaves the CMN production line.

Beyond product quality, CMN offers a level of technical customer support that large OEM brands often cannot match. The technical team provides pre-sale consultation to confirm spline configurations, PTO shaft dimensions, and clutch specifications for your exact tractor and implement combination. Customized PTO shaft parts for non-standard applications are available with detailed dimensional drawings upon request. After the sale, CMN's one-stop after-sales service ensures that replacement components, technical guidance, and warranty support are always accessible. When you choose CMN Transmission, you are choosing a partner committed to keeping your equipment running efficiently, reliably, and safely, season after season, harvest after harvest.

Perguntas frequentes

Q: What type of PTO shaft do I need for a New Holland Discbine 1441 or 1442?
A: The New Holland Discbine 1441 and 1442 models require a heavy-duty equipped with a CAT 6 Constant Velocity main shaft and a Category 5 Double CV secondary shaft. These wide-cut 12-disc models transmit significant torque across wide operating angles during the swivel-hitch tongue movements, making the CV joint design essential for smooth, vibration-free power delivery. A combination clutch incorporating both friction-slip and overrunning functions is strongly recommended for protection against rock strike damage and drivetrain back-torque on both these large models.

Q: What is the difference between the CAT 4 and the CAT 6 PTO shaft for the Discbine?
A: CAT 4 (Category 4) PTO shaft parts are factory-fitted to many New Holland Discbines but are rated for lighter-duty torque transmission. CMN Transmission recommends upgrading to a CAT 6 configuration for improved service life and higher torque capacity. The larger PTO shaft tube diameter, heavier-wall PTO shaft tubing, and more robust CV joint assembly of the CAT 6 provide significantly better durability under the continuous high-load conditions of commercial hay and forage harvesting, particularly on the larger 10-disc and 12-disc Discbine models.

Q: What spline configuration do I need for the tractor end of the PTO shaft?
A: Most tractors paired with New Holland Discbines use either a 1.375-6 spline for standard 540 PTO shaft applications, or a 1.750-20 spline for higher-horsepower 1000 rpm PTO shaft configurations. The implement input end uses a 1.375-21 spline as standard across all Discbine 1409 through 1442 models. Please confirm your tractor's PTO output shaft PTO shaft sizes specification before ordering to ensure correct PTO shaft yoke selection and eliminate the need for a PTO shaft adapter.

Q: What is the standard overall PTO shaft length (OAL) for these Discbine models?
A: The standard PTO shaft length for the New Holland Discbine 1409-1442 series is approximately 36 inches OAL. This is a notably short shaft and operators must pay careful attention to PTO shaft dimensions when connecting to different tractor models. Verify that the shaft neither fully collapses nor fully extends during any field operation or headland turn. Over-turning on tight headlands is the primary risk with this short shaft configuration and can cause the telescoping tubes to bottom out, resulting in shaft damage or dangerous disconnection. Custom PTO shaft length options are available from CMN Transmission for non-standard tractor-implement distance requirements.

Q: What is the FNT34 Combination Clutch and why does the Discbine need it?
A: The FNT34 Combination Clutch is a dual-function torque protection device that combines a friction slip element with an overrunning (freewheel) element. As a PTO shaft with slip clutch, the friction component slips to absorb shock loads when the cutterbar strikes a rock or hard obstacle, preventing gear breakage in the expensive disc modules. The overrunning element allows the heavy rotating Discbine cutterbar and conditioning system to coast to a stop independently after PTO disengagement, preventing dangerous reverse torque from damaging the tractor's drivetrain. Both functions together provide comprehensive protection that a simple shear bolt PTO shaft or shear pin PTO shaft cannot match, because they activate immediately and continuously rather than requiring manual shear pin replacement after each event.

Q: Is this PTO shaft compatible with both 540 rpm and 1000 rpm PTO shafts?
A: Yes. The CMN Transmission PTO shaft for New Holland discbine is compatible with both 540 PTO shaft and 1000 rpm PTO shaft tractor configurations. The difference lies in the tractor-end yoke spline selection: 1.375-6 for 540 rpm tractors and 1.750-20 for 1000 rpm high-horsepower tractors. The shaft body, CV joints, FNT34 combination clutch, and PTO shaft universal joint assemblies are rated for both operating speeds. Confirm your tractor's PTO speed setting and the corresponding output stub shaft spline before placing your order, and our technical team will confirm the correct yoke specification.

P: Como a transmissão CMN se compara ao eixo PTO da Weasler como opção de substituição?
A: O eixo de tomada de força (TDF) agrícola da CMN Transmission é um substituto de alta qualidade para o eixo de TDF da Weasler e unidades similares de marcas premium. Ambos utilizam construção em aço liga, usinagem de precisão e processos de tratamento térmico. A principal vantagem da CMN Transmission é o preço direto da fábrica: como fabricante integrada, sem a intermediação de revendedores, a CMN normalmente oferece uma economia de 20 a 35% em comparação com produtos equivalentes de marcas OEM. Os produtos da CMN possuem certificações ISO 9001, CE e TS16949, atendendo ou superando os padrões de qualidade de alternativas de marcas renomadas, e o suporte técnico pré-venda da equipe de engenharia da CMN garante a especificação correta para a combinação exata de eixo de TDF e implemento do seu trator antes de qualquer pedido ser feito.

P: Como faço para medir corretamente o comprimento do eixo da tomada de força (PTO) da minha Discbine?
R: Para medir o comprimento correto do eixo da tomada de força (TDF) para o seu conjunto trator-ensaio de discos, acople o trator e o implemento na posição normal de operação do engate e meça a distância entre os centros do eixo de saída da TDF do trator e do eixo de entrada do ensaio de discos, com ambas as unidades em sua altura normal de trabalho. O eixo montado na posição de operação não deve apresentar os tubos telescópicos em curso mínimo ou máximo. Para os modelos de ensaio de discos com eixo curto, verifique também o eixo em ângulos de giro de cabeceira completos para garantir que não haja sobre-extensão. Entre em contato com a equipe técnica da CMN Transmission com essa medida e confirmaremos as dimensões corretas do eixo da TDF para sua aplicação.

P: Com que frequência o eixo da tomada de força (TDF) de uma ceifadeira-de-discos New Holland deve ser lubrificado?
R: Todas as juntas homocinéticas, juntas cardan e estrias do garfo deslizante do eixo da tomada de força (TDF) devem ser lubrificadas a cada 8 horas de operação no campo ou, no mínimo, uma vez por dia durante o uso sazonal intensivo. Utilize graxa de lítio ou de complexo de lítio de grau EP2, adequada para aplicações em transmissões de alta velocidade. Lubrifique até que o lubrificante fresco seja expelido pelas vedações da junta, confirmando a lubrificação completa de todas as superfícies de contato. A lubrificação regular é a ação de manutenção mais importante para prolongar a vida útil das juntas universais e homocinéticas do eixo da TDF. Negligenciar os intervalos de lubrificação é a principal causa de falhas prematuras nos eixos da TDF de tratores de todas as marcas e especificações.

P: A CMN Transmission pode fornecer um eixo de tomada de força (PTO) personalizado para aplicações não padronizadas?
R: Sim. A CMN Transmission oferece fabricação completa de eixos de tomada de força (TDF) personalizados e serviço OEM. Se a sua aplicação exigir um comprimento de eixo de TDF não padrão, configuração de estrias incomum, tipo de embreagem diferente, tamanhos alternativos de eixo de TDF ou dimensões específicas de eixo de TDF não cobertas por itens de catálogo padrão, nossa equipe de engenharia analisará os requisitos, fornecerá um desenho dimensional para confirmação e preparará um orçamento. Eixos de transmissão de TDF personalizados geralmente exigem uma quantidade mínima de pedido e um prazo de entrega de 15 a 25 dias úteis, dependendo da complexidade. Entre em contato com a equipe técnica informando o modelo completo do seu trator, modelo do implemento, velocidade de operação da TDF e a distância medida entre os eixos para iniciar o processo.

P: Quando devo substituir a proteção do eixo da tomada de força?
A: A proteção e a tampa do eixo da tomada de força (TDF) devem ser substituídas sempre que apresentarem rachaduras, fissuras, deformações por impacto ou degradação por raios UV que tornem o plástico quebradiço ou descolorido. Substitua a proteção se os anéis de rolamento não permitirem mais que o tubo externo da proteção permaneça estacionário enquanto o eixo gira dentro dele, o que indica falha nos anéis de rolamento. Inspecione a proteção no início de cada temporada e após qualquer impacto conhecido. Uma proteção rachada, quebrada ou girando representa um sério risco à segurança do operador e nunca deve ser utilizada nessas condições. Seções de proteção, anéis de rolamento e correntes de retenção de reposição estão disponíveis individualmente no estoque de peças para eixos de TDF da CMN Transmission para reparos com ótimo custo-benefício.

Avaliações de clientes

Marcus Thompson, Gerente de Fazenda, Estados Unidos
"Usamos um trator New Holland 1411 em nossa plantação de alfafa de 73 hectares no meio-oeste americano há cerca de seis anos, e o eixo da tomada de força original finalmente quebrou no outono passado após o impacto de uma pedra grande. Encomendamos a embreagem CV de reposição CAT 6 da CMN Transmission depois de pesquisar sobre o sistema de embreagem combinada deles. Recebi em cerca de 10 dias, o que honestamente me surpreendeu para um pedido internacional. Encaixou perfeitamente na entrada do implemento 1.375-21 sem necessidade de calços, e a extremidade do trator 1.375-6 travou diretamente no eixo da tomada de força do nosso trator 540 sem qualquer problema. Usamos por cerca de 220 horas durante a temporada de corte da primavera e tem se mostrado absolutamente sólido, sem vibração, sem acúmulo de calor na extremidade da CV. A embreagem deslizou perfeitamente quando atingimos um dreno no mês passado e salvou a caixa de câmbio. Honestamente, melhor que a original. Compraria novamente sem hesitar e recomendo aos colegas da nossa cooperativa agrícola."

James O'Brien, Empreiteiro de Feno, Austrália
"Operamos quatro Discbines aqui na bacia Murray-Darling, cortando feno de azevém e trevo para fazendas leiteiras locais. A substituição do eixo da tomada de força (TDF) faz parte da nossa rotina de manutenção nessa escala. Ao longo dos anos, experimentamos alguns fornecedores diferentes, mas a CMN Transmission tem sido a mais consistente em termos de qualidade e prazo de entrega. O último lote de três eixos CV CAT 6 com a embreagem combinada FNT34 levou cerca de 12 dias para chegar a Albury, vindo da Coreia. Os três se encaixaram perfeitamente em nossos modelos 1441 e 1442, sem qualquer problema. As proteções são sólidas, não o plástico fino e frágil que às vezes encontramos em peças de reposição baratas, e o movimento telescópico dos tubos é muito suave. Atualmente, dois dos eixos já acumularam mais de 300 horas de uso e continuam funcionando perfeitamente. Com certeza faremos novos pedidos quando necessário."

Pierre Dubois, produtor de leite, França
"Tenho um trator New Holland 1412 e o eixo original já havia sido reparado uma vez antes da junta homocinética secundária se desgastar completamente. Consultei os preços de peças de reposição originais na concessionária local e fiquei sinceramente chocado. Encontrei a CMN Transmission online e enviei a eles os números do modelo e as especificações das estrias existentes. A equipe técnica deles retornou em poucas horas confirmando a configuração correta, incluindo o eixo secundário com junta homocinética dupla e a embreagem FNT34, e o preço era extremamente competitivo. O envio para a Normandia levou cerca de 14 dias e chegou muito bem embalado. O eixo da tomada de força encaixou exatamente como descrito, a estria da extremidade do implemento 1.375-21 era perfeita. Três cortes sem nenhum problema. Excelente custo-benefício e ótimo serviço."

Klaus Steinberg, empreiteiro agrícola, Alemanha
"Como prestador de serviços, preciso de peças que cheguem rápido e funcionem de forma confiável. A CMN Transmission me impressionou com a rapidez com que sua equipe técnica respondeu, fornecendo as dimensões exatas do eixo e as especificações da embreagem para minhas ceifadeiras-debulhadoras 1409 e 1410, ambas com configurações de estrias diferentes. Os eixos chegaram bem dentro do prazo prometido, ambos configurados corretamente e instalados sem necessidade de qualquer modificação. Após uma temporada completa de corte comercial de feno em diversas fazendas de clientes, com aproximadamente 400 horas de uso combinadas entre os dois eixos, não tive um único problema. A qualidade da proteção do eixo da tomada de força é visivelmente superior à de peças de reposição mais baratas que experimentei de outros fornecedores. Farei pedidos diretamente da CMN Transmission para toda a nossa frota daqui para frente."

William Fraser, criador de ovelhas e gado bovino, Nova Zelândia
"Estamos na Ilha Sul, operando uma New Holland 1441 em pastagens bastante acidentadas e montanhosas. Os eixos da tomada de força sofrem bastante aqui, pois frequentemente trabalhamos em ângulos acentuados em terrenos íngremes. O eixo que eu usava antes era uma peça barata e sem marca, e durou menos de uma temporada antes da junta homocinética falhar completamente. O eixo homocinético CMN Transmission CAT 6 tem sido uma experiência completamente diferente. A junta homocinética suporta o trabalho em ângulos acentuados sem vibração ou aquecimento, e a embreagem combinada salvou a caixa de engrenagens da Discbine de danos por impacto de pedras pelo menos duas vezes nesta temporada. Fiz o pedido no início de dezembro e chegou antes do Natal, o que é impressionante considerando a distância de envio da Coreia para a Ilha Sul. O preço foi muito justo em comparação com o que a concessionária New Holland queria por uma peça original."

Robert Whitmore, produtor de feno, Canadá
"Usamos uma Discbine 1442 em nossa fazenda de feno em Saskatchewan e encontrar peças de reposição locais para os modelos mais antigos pode ser um verdadeiro desafio. A CMN Transmission tinha o eixo CV CAT 6 correto com embreagem combinada FNT34 em estoque e pronto para envio, sem necessidade de encomenda especial. A entrega para Saskatchewan levou 11 dias da Coreia, mais rápido do que eu esperava. Encomendei a opção de garfo para trator 1.750-20 para o nosso trator Versatile mais antigo e encaixou sem a necessidade de adaptador. A extremidade do implemento alinhou-se perfeitamente no eixo de entrada da 1442. Usamos a máquina durante toda a temporada de feno, cortando uma mistura de alfafa e timóteo, cerca de 350 horas no total. Nenhum problema. Bom produto, bom atendimento. Transação direta do pedido à instalação."

Tom Harrington, Empreiteiro Agrícola, Reino Unido
"Utilizo duas Discbines em Wiltshire para serviços de corte de grama por contrato, uma 1410 e uma 1412. Encomendei um eixo de tomada de força (TDF) de reposição para a 1412 da CMN Transmission depois que a unidade Weasler original finalmente parou de funcionar. O preço da CMN foi cerca de 30% menor do que o orçamento da concessionária para um equivalente da Weasler, e a qualidade é realmente comparável. A entrega levou 10 dias. O condicionador de martelos da 1412 exerce muita pressão no eixo de transmissão da TDF, e a embreagem combinada já salvou a caixa de câmbio uma vez quando atingimos um poste de cerca antigo enterrado em um campo recuperado. Construção de boa qualidade, proteção bem acabada e fácil de instalar. É ótimo lidar com um fornecedor que realmente conhece as especificações técnicas dos modelos específicos da Discbine, em vez de me dar respostas genéricas."

Carlos Mendoza, Gerente de Fazenda, Brasil
"Operamos uma grande fazenda de gado leiteiro com cultivo de alfafa irrigada na região do Paraná e utilizamos a ceifadeira-debulhadora New Holland Discbine 1441 para múltiplos cortes por mês durante a safra principal. A substituição do eixo da tomada de força (TDF) é um item de manutenção programada para nós, dada a intensidade de uso. Após a recomendação de um gerente de fazenda em Mato Grosso do Sul, entramos em contato com a CMN Transmission e ficamos muito impressionados com o suporte técnico, incluindo desenhos dimensionais detalhados para o eixo principal CV CAT 6 e o ​​eixo secundário CV duplo CAT 5 antes do pedido. Os eixos chegaram em cerca de 16 dias ao nosso endereço logístico em Curitiba. A instalação foi simples. Já estamos na nossa primeira safra completa, com múltiplos cortes por mês, e o eixo está se comportando extremamente bem. O torque de deslizamento da embreagem combinada está corretamente ajustado e consistente. Ótimo produto e preço de fábrica competitivo."

Diego Gutierrez, produtor de alfafa, Argentina
"Cultivo alfafa na província de Mendoza e meu trator New Holland 1441 é o coração da nossa operação de colheita. Quando o eixo da tomada de força (TDF) original começou a apresentar desgaste na junta homocinética secundária após várias temporadas de uso intensivo, eu precisava de uma peça de reposição confiável rapidamente, antes do início da temporada principal de colheita. A CMN Transmission confirmou a especificação correta para o 1441 em um dia útil, incluindo a embreagem combinada, o eixo secundário com junta homocinética dupla e o garfo correto para o trator. O envio para Mendoza levou 18 dias. O eixo encaixou sem necessidade de qualquer modificação. Duas temporadas completas de colheita depois, ele continua funcionando sem nenhum problema. A qualidade da proteção telescópica completa também superou minhas expectativas para um produto de reposição. Excelente custo-benefício e serei um cliente recorrente."