Eje de toma de fuerza para trituradoras de martillos John Deere 115, 120

Eje de toma de fuerza fiable para modelos de trituradoras de martillos John Deere

PTO Shaft for John Deere Flail Shredder Model: 115, 120

The PTO Shaft for John Deere Flail Shredders 115 and 120 is engineered to transfer full engine power from your tractor's power take-off output to the demanding drivetrain of the John Deere 100 Series drawn flail shredder. Manufactured to CAT4 Series 4 driveline standards, this PTO driveline shaft for flail shredder is constructed from cold-drawn alloy steel tubing, precision-forged yokes, and heat-treated universal joints, delivering consistent, vibration-free power at 1000 RPM PTO speeds. An integrated slip clutch provides overload protection, preventing costly gearbox and drivetrain damage when the flail rotor contacts rocks, stumps, or unexpected debris. The shaft meets ISO 9001, CE, and TS16949 quality standards and is offered as an equivalent replacement of Weasler PTO shaft and other OEM units, at significantly lower cost without any compromise in reliability or safety.

Designed for real-world agricultural workloads, this flail shredder PTO shaft excels in a wide range of vegetation management scenarios. Whether you are shredding dense corn stalks after harvest, managing overgrown pastures, clearing roadside vegetation, or maintaining orchard alleyways and vineyard rows, this PTO drive shaft for flail shredder delivers steady, reliable power transmission under continuous high-load conditions. The telescoping inner and outer steel tubes allow the PTO shaft length to adjust as the tractor and shredder pivot over uneven terrain, maintaining a constant power transfer angle. The full-length CE-certified PTO shaft guard encloses all rotating components, protecting the operator and bystanders. Whether you manage a large-scale row crop farm, a grazing pasture, a commercial roadside crew, or an orchard estate, this agricultural PTO shaft from CMN Transmission is the smart, durable, and cost-effective choice for your John Deere 115 or 120 flail shredder.

Eje principal: CAT 7/8 SFT SH serie de velocidad constante

par máximo = 6750 Nm

Serie SH RL3 Sobremarcha

John Deere Flail Shredder 115/120 Specifications

Especificaciones técnicas

Features of PTO Drive Shaft for John Deere Flail Shredder

1. Precision OEM-Compatible Fit
This PTO shaft for John Deere flail shredder is engineered to exact OEM dimensions, ensuring a direct bolt-on fit for both the John Deere 115 and 120 flail shredder models. The 1-3/8" x 21-spline tractor yoke slides straight onto the standard 1000 PTO shaft output stub without shimming, adapters, or modification. Correct PTO shaft dimensions and yoke geometry guarantee proper operating angles and eliminate the vibration that leads to premature universal joint wear. Suitable as a direct replacement of Weasler PTO shaft and other OEM units.

2. Heavy-Duty CAT4 Series Construction
Built to CAT4 / Series 4 driveline standards, this heavy duty PTO shaft uses cold-drawn alloy steel PTO shaft tubing in a high-strength lemon-profile inner and star-profile outer configuration for maximum torque capacity and axial sliding strength. Heat-treated yokes and hardened PTO shaft universal joints are rated for continuous operation at up to 1,000 Nm of transmitted torque, making this shaft suitable for the full horsepower range of the John Deere 115 and 120 100 Series shredders under the most demanding field conditions.

3. Integrated Slip Clutch Overload Protection
The built-in slip clutch PTO shaft mechanism automatically disengages the drivetrain when shock loads or sudden obstructions exceed the preset torque threshold, protecting your tractor's PTO gearbox, the flail shredder gearbox, and the entire PTO driveline shaft from catastrophic overload damage. Unlike a shear bolt PTO shaft which requires stopping work and replacing a bolt after each event, the slip clutch re-engages automatically once the obstruction clears, dramatically reducing downtime in the field. Clutch slip torque is factory-set and field-adjustable.

4. CE-Certified Full-Length Safety Guard
Operator safety is non-negotiable. The included PTO shaft cover and full-length PTO shaft guard assembly is CE-certified and fully encloses all rotating tubes, yokes, and universal joints for the entire operating length of the shaft. The guard is manufactured from impact-resistant polymer, features retaining chains to hold it stationary while the shaft rotates, and meets EU Machinery Directive 2006/42/EC and OSHA requirements. The guard telescopes with the PTO shaft tube to maintain full coverage at all extension lengths, ensuring compliance and protection in all field conditions.

5. Advanced Corrosion-Resistant Finish
All steel PTO shaft parts including the yokes, PTO shaft adapter flanges, and telescoping tubes are pre-treated with a high-adhesion phosphate conversion coating, then coated with anti-corrosion grease before assembly. This multi-layer surface protection system significantly extends the service life of the shaft when operating in wet, muddy, or chemically treated crop fields. The result is a tractor PTO shaft that resists rust and oxidation far better than standard painted or bare-steel alternatives, reducing total cost of ownership over multiple seasons of heavy use.

6. Custom PTO Shaft Support and OEM Flexibility
CMN Transmission supports custom PTO shaft manufacturing for buyers who need specific PTO shaft sizes, non-standard PTO shaft yoke configurations, alternative PTO shaft u-joint cross sizes, or branded OEM packaging. Whether you are a farm dealer, an equipment manufacturer, or a fleet operator needing a 1000 PTO shaft variant or a modified PTO shaft length, our engineering team can design and produce a shaft to your exact drawing or sample. Minimum order quantities are flexible, and full OEM labeling and documentation are available.

¿Cómo funciona el eje de la toma de fuerza de la trituradora de martillos?

1. Power Origination at the Tractor PTO Output
The entire power transmission chain begins at the tractor's rear PTO stub shaft. On most utility tractors paired with the John Deere 115 or 120 flail shredder, this is a standard 1-3/8" diameter, 21-spline output rotating at 1000 RPM. The tractor's engine converts fuel energy into rotational torque, and the PTO gearbox inside the tractor routes this rotation rearward to the external PTO stub shaft. The tractor PTO drive shaft yoke at the tractor end of our driveline shaft slides over this stub and locks via a spring-loaded collar pin, securing the connection and ensuring true axial alignment between the shaft centerline and the tractor PTO output axis.

2. Torque Transmission Through the Universal Joints
From the tractor-end yoke, torque flows through the first PTO shaft u-joint, a Cardan-type cross-and-bearing assembly capable of transmitting rotation through operating angles of up to 15 degrees. This angular flexibility is critical because the John Deere 115 and 120 shredders are drawn implements; as the tractor turns or the terrain undulates, the vertical and horizontal angle between the tractor PTO stub and the shredder gearbox input shaft constantly changes. The universal joint accommodates this angular misalignment smoothly, converting the offset rotation into continuous torque delivery without binding or vibration. The two universal joints, one at each end of the PTO drive shaft, work in tandem to cancel out velocity fluctuations, ensuring the gearbox input receives smooth, uniform rotational speed throughout each turn.

3. Length Compensation Through the Telescoping Tube
Between the two universal joints sits the telescoping PTO shaft tube assembly. The profiled inner tube slides within the outer tube, allowing the effective PTO shaft length to extend or contract as the distance between the tractor PTO stub and the shredder gearbox input changes dynamically during operation. The lemon or star profile of the interlocking tube cross-sections ensures that torque is transmitted through the full range of extension without slippage. A minimum tube overlap of at least one-third of the inner tube length must always be maintained to prevent separation. The surfaces of the inner and outer tubes are precisely ground and pre-lubricated with high-pressure grease to ensure smooth, low-friction telescoping motion under full load.

4. Overload Protection via the Slip Clutch
Mounted at the implement end of the driveline, the PTO shaft with slip clutch provides critical overload protection for both the tractor drivetrain and the flail shredder gearbox. The slip clutch is a spring-loaded friction disc mechanism preset to a specific torque threshold. During normal operation, the clutch engages fully and transmits power continuously. When the flail rotor suddenly strikes a rock, a thick tree branch, a buried stump, or any other obstacle that causes instantaneous torque to spike above the preset limit, the friction discs slip against each other, absorbing the shock energy and preventing the impulse from propagating backward into the tractor gearbox or forward into the shredder gearbox. Once the obstruction clears and the torque returns to normal, the clutch automatically re-engages and operation continues without stopping.

5. Power Delivery to the Flail Shredder Gearbox
The implement-end PTO shaft yoke connects directly to the input stub shaft of the John Deere 115 / 120 flail shredder gearbox. The gearbox then divides and redirects this power through internal bevel and spur gears, changing the shaft rotation axis from longitudinal (along the direction of travel) to transverse (across the width of the machine), driving the central rotor shaft at the correct speed for the flail knife blades to achieve effective cutting velocity. The PTO driveline shaft therefore acts as the critical mechanical bridge between the tractor and the shredder, and its precision engineering, correct sizing, and proper maintenance directly determine the efficiency, safety, and longevity of the entire shredding operation.

Applications of PTO Shaft for Flail Shredder

1. Trituración de tallos de cultivos
After corn, sunflower, sorghum, or soybean harvest, dense standing or fallen crop residue must be reduced to manageable pieces to allow field tillage and the next planting cycle. The John Deere 115 / 120 flail shredder driven by this heavy-duty PTO drive shafts delivers the sustained high-torque performance needed to shred thick, woody stalks in a single pass. The slip clutch protects the drivetrain when the rotor encounters compacted, tangled residue masses common after wet harvest seasons, keeping overall throughput high and downtime minimal throughout long field days.

2. Mantenimiento de pastos
Controlling rank pasture growth, removing thistles, nettles, and broadleaf weeds, and distributing grass clippings evenly across grazing paddocks are essential annual tasks on cattle, sheep, and equine operations. This flail shredder PTO shaft transmits the consistent rotational power the 100 Series shredder needs to maintain an even cut height across undulating pasture ground. The PTO shaft with slip clutch is especially valuable in pasture environments where hidden rocks, old fence posts, and buried objects present a constant shock-load risk to the driveline and gearbox.

3. Mantenimiento de la carretera
Municipal road departments and private contractors use the John Deere 115 / 120 flail shredder for cutting roadside vegetation, managing sight-line clearances, and controlling encroaching shrub growth along highways and rural roads. This environment demands a tractor PTO shaft that can handle diverse plant types, litter-contaminated ground, and concealed hazards like guardrail bases and drainage culverts. The telescoping PTO shaft tube and dual universal joints keep power delivery constant even as the operator navigates curves, ditch slopes, and elevation changes at the road shoulder.

4. Mantenimiento de parques y terrenos escolares
Large public green spaces, sports fields, and school campuses require frequent and reliable vegetation management to maintain aesthetics and safety. The low-throw, enclosed-rotor design of the John Deere flail shredder makes it especially suited to areas where people or property are nearby, and this high-performance eje de toma de fuerza agrícola ensures the shredder operates at full efficiency across large open areas without interruption. Park maintenance teams benefit from the slip clutch protection when the shredder encounters buried sprinkler heads, sign posts, or playground equipment footings that occasionally protrude into mowing zones.

5. Mantenimiento de huertos y viñedos
In tree fruit orchards and vine-trained vineyards, managing the inter-row floor is critical for controlling competition weeds, reducing frost risk, and maintaining soil structure for tractor access. The compact width of the 100 Series flail shredder combined with this reliable PTO driveline shaft for flail shredder allows operators to make multiple passes per season through tight row spacings. The precise power delivery of the PTO drive shafts ensures consistent cut quality even when shredding green manure cover crops, cane prunings, or leaf litter on uneven orchard floor terrain.

6. Mantenimiento de cunetas y taludes
Drainage ditches, irrigation canal banks, and earthen berms require periodic vegetation cutting to maintain water flow capacity, structural integrity, and pest control. Operating on sloped, soft, or wet ground demands a tractor PTO drive shaft that maintains power transmission reliability when the tractor and implement are positioned at challenging angles. The telescoping design and angular capacity of this PTO shaft universal joint assembly accommodates the dynamic geometry changes experienced when the tractor traverses a bank slope while the shredder cuts the ditch floor below, ensuring continuous, effective power delivery throughout the entire pass.

Pasos de instalación

1. Pre-Installation Safety and Dimensional Check
Before installing the new PTO shaft tractor connection, shut down the tractor engine completely, engage the parking brake, and wait for all rotating components to stop. Verify that the collapsed and extended PTO shaft dimensions match the measured distance between the tractor PTO stub and the shredder gearbox input stub under both minimum and maximum hitch operating geometry. Confirm that both stub shafts are the correct spline size (1-3/8" x 21-spline for 1000 RPM) to match the yoke bore on the replacement shaft. Check that the minimum tube overlap at full extension is at least 150 mm to prevent shaft separation during work.

2. Lubricate All Grease Points Before Assembly
Before fitting the shaft, apply fresh EP2 lithium-complex grease to all four grease nipples on the PTO shaft u-joint cross bearings at both ends of the driveline, and to the telescoping PTO shaft tubing inner surface. On new shafts, a factory grease pre-coat is applied, but adding fresh grease ensures all bearing races and tube sliding surfaces are fully lubricated from the first rotation. Proper initial lubrication is the single most important step in maximizing the operational lifespan of the PTO shaft parts and preventing premature universal joint and tube wear during the break-in period.

3. Connect the Tractor-End Yoke
With the tractor engine off and PTO disengaged, slide the tractor-end PTO shaft yoke onto the tractor's rear PTO stub shaft, aligning the spline teeth carefully to avoid cross-threading. Push the yoke fully home until the spring-loaded locking collar snaps over the retention groove on the PTO stub. Pull back firmly on the yoke to confirm the collar has fully engaged and the shaft is secured. Note the yoke's phasing: both yokes on a standard Cardan driveline must be phased in the same plane (both forks parallel) to cancel velocity variation through the universal joints and ensure smooth rotation at the gearbox end.

4. Connect the Implement-End Yoke and Secure Safety Guard
Connect the implement-end PTO shaft yoke to the John Deere 115 / 120 flail shredder gearbox input stub in the same manner, verifying the locking collar clicks home. Then attach the PTO shaft guard retaining chains at both ends to secure the stationary guard cones to the tractor and implement frames. These chains prevent the guard from rotating with the shaft, which is essential for operator safety. Confirm that the guard completely encloses all rotating shaft sections and that no section of the shaft or PTO shaft cover is exposed. The guard must be installed before starting the tractor under any circumstances.

5. Set Slip Clutch Torque and Test Run
Before the first full field operation, verify the slip clutch PTO shaft torque setting by consulting the spring compression adjustment on the clutch body. The factory setting is calibrated for the John Deere 115 / 120 gearbox's rated input torque. Engage the tractor PTO at low engine speed first to confirm the driveline rotates freely without vibration, noise, or guard interference. Gradually increase speed to full 1000 RPM PTO speed and listen for any abnormal sound from the universal joints or telescoping tube. Confirm the shredder engages and operates at the expected performance level before committing to full-load field operation.

6. Disengage and Inspect After First Hours of Use
After the first 8 to 10 hours of operation with the new tractor PTO shafts, stop work, shut off the engine, and re-inspect all yoke locking collars for secure engagement, re-grease all universal joint nipples, check the telescoping tube for smooth sliding action, and confirm the guard chains remain properly attached. This break-in inspection is important because new spline connections and universal joint bearing races settle slightly under load, and early re-lubrication prevents the micro-fretting wear that can shorten universal joint life significantly if neglected during the critical first hours of service.

Maintenance Tips for PTO Driveline Shaft

1. Regular Universal Joint Lubrication Every 8 Hours
The PTO shaft u-joint cross-and-bearing assemblies are the highest-wear components in the driveline. Apply EP2 lithium-complex grease through all four grease nipples on each cross journal until fresh grease appears at the bearing seal lips, confirming full purge of the old grease and contaminants. Perform this lubrication cycle every 8 hours of field operation or at minimum once per working week during peak season. In sandy, gritty, or wet operating environments, shorten the interval to every 4 hours to prevent abrasive ingress into the needle bearing races, which is the primary cause of premature PTO shaft universal joint failure.

2. Telescoping Tube Cleaning and Relubrication
The sliding inner and outer PTO shaft tube surfaces accumulate crop residue, soil, and moisture, all of which increase sliding resistance and promote corrosive attack on the tube profile surfaces. At the end of each working day during high-intensity seasons, retract the shaft to its minimum length, clean both tube surfaces with a dry brush or compressed air, and apply a fresh coat of EP2 grease to the inner tube profile before extension. This maintenance step takes less than five minutes but dramatically extends the service life of the PTO shaft tubing by preventing the profile wear that eventually causes play, vibration, and loss of torque capacity in the telescoping joint.

3. Guard Inspection and Repair
Inspect the full-length PTO shaft guard at the start of every working week for cracks, fractures, missing retaining chain clips, or sections that have become dislodged from the cone support brackets. A damaged or missing guard is not only a legal safety violation in most jurisdictions but also exposes the rotating shaft to direct contact with crop material, which can cause sudden stall and shock loads on the driveline. Replace cracked or broken guard sections immediately with original CMN Transmission replacement PTO shaft cover parts to maintain full CE compliance. Do not operate the shredder with an incomplete or damaged guard under any circumstances.

4. Slip Clutch Inspection and Annual Adjustment
The friction discs and spring pack inside the slip clutch PTO shaft assembly require annual inspection for wear, glazing, and spring fatigue, especially on shafts used in high-frequency obstruction environments. Remove the slip clutch cover at the end of each season, inspect the disc surfaces for scoring or heat discoloration, measure the spring free length against the specification, and replace any worn components before the next season begins. Re-set the spring compression to the correct torque-slip specification after reassembly and verify clutch operation before returning to work. Neglecting this maintenance is the leading cause of slip clutch failure to disengage under overload, resulting in costly drivetrain damage.

5. Off-Season Storage Preparation
When storing the flail shredder and PTO drive shaft for winter or extended periods, clean all external shaft surfaces thoroughly, apply a liberal coating of rust-preventive grease to exposed metal on the yokes and tube profiles, and grease all universal joint nipples to a full purge. Collapse the telescoping tubes to their minimum extension and store the shaft horizontally in a dry, sheltered location away from fertilizers or agrochemicals that accelerate corrosion. If the shaft will be stored for more than three months, consider removing it from the shredder completely and hanging it vertically on a wall hook to prevent flat-spotting of the guard and allow any residual moisture to drain away from the bearing assemblies.

Solución de problemas comunes

1. Problema: Vibración excesiva durante el funcionamiento
Cause and Solution: Vibration in a PTO driveline shaft most commonly results from worn or damaged PTO shaft universal joint needle bearings, incorrect yoke phasing, a bent shaft tube, or operating at excessive angular misalignment above the shaft's rated angle. Check both universal joints for free rotation and play in all directions. Re-inspect yoke phasing to confirm both forks are in the same plane. Measure the operating angle between tractor PTO stub and implement gearbox input to confirm it does not exceed 15 degrees at maximum articulation. Replace any worn cross-and-bearing sets immediately, as a failed universal joint at operating speed can cause severe equipment and personal safety incidents.

2. Problem: Shaft Slipping or Power Loss Under Load
Cause and Solution: If the slip clutch PTO shaft slips repeatedly under normal operating conditions rather than only during genuine overloads, the friction disc springs may have fatigued, reducing the clutch's preset engagement torque below the nominal level required to transmit rated power. Alternatively, moisture contamination or grease migration into the friction disc surfaces can cause sustained slip under normal loads. Open the slip clutch assembly, clean all friction disc faces with a dry cloth or brake cleaner, replace fatigued springs with new components, and reset the spring compression to the correct specification. If the problem is a genuine overload, reduce forward travel speed or cutting depth rather than increasing clutch pressure above its designed limit.

3. Problem: Overheating at the Universal Joints
Cause and Solution: Heat buildup at the PTO shaft u-joint cross bearings is a reliable indicator of lubrication failure or bearing damage. Stop operation immediately if you detect burning smell or see heat discoloration near the cross journals. Inspect the needle bearing races for seized or missing needles, which indicate a bearing that has collapsed from lack of grease or has ingested abrasive material. Purge old grease from all nipples completely with fresh EP2 grease before resuming work. If the bearings show any scoring or roughness, replace the entire cross-and-bearing set as a unit rather than attempting to regrease and continue. Running on damaged bearings leads to rapid cross journal galling and full PTO shaft parts failure.

4. Problem: Telescoping Tube Sticking or Binding
Cause and Solution: Resistance or binding when the PTO shaft tubing tries to extend or collapse indicates that the inner and outer tube profiles have become loaded with dried crop residue, soil paste, or rust from operating without lubrication. Remove the inner tube completely from the outer, clean both mating surfaces with a wire brush or solvent-dampened rag until all debris and oxidation are removed, and re-inspect the profile surfaces for any raised burrs or impact marks that could cause mechanical binding. Smooth any raised metal with a fine file, then apply a heavy bead of EP2 grease to the full length of the inner tube profile before re-assembly. Establish a routine daily cleaning and greasing schedule going forward to prevent recurrence.

5. Problem: Guard Rotation With the Shaft
Cause and Solution: If the PTO shaft guard is observed rotating with the driveline instead of remaining stationary, one or both of the retaining chains has detached from either the tractor frame bracket or the implement frame bracket. A rotating guard creates a serious entanglement hazard and must be corrected before operation continues. Stop immediately, disengage the PTO, shut off the engine, and re-attach the chain at both anchor points using the correct chain hooks or cotter pins. Inspect the anchor brackets on both the tractor and the shredder for damage. If chain hooks are missing or bent, replace them with the correct retaining hardware before resuming work. Never operate the shredder with a guard that is rotating freely.

Eje de toma de fuerza de la trituradora de martillos y caja de engranajes de la segadora de martillos

The flail shredder PTO shaft is the mechanical link between the tractor and the flail mower or shredder. It is a telescoping, two-universal-joint driveline assembly that transmits the rotational torque produced at the tractor's PTO output shaft to the input stub of the flail shredder's main gearbox. Without a properly sized, correctly installed, and well-maintained PTO driveline shaft for flail shredder, the shredder cannot operate regardless of how powerful the tractor is or how well the shredder's internal components are maintained.

The key engineering characteristics of a flail shredder PTO shaft include its driveline series rating (which determines maximum torque capacity), the spline configuration at each end (which must match both the tractor PTO stub and the gearbox input stub), the overall collapsed and extended length, the operating angle range of the universal joints, and the type of overload protection device fitted. For demanding applications like the John Deere 115 and 120 flail shredders, a CAT4 or Series 4 shaft with an integrated slip clutch is the recommended specification, providing both the torque capacity for heavy vegetation shredding and the overload protection to handle the frequent impact loads inherent in flail shredder operation. CMN Transmission's PTO shaft for John Deere flail shredder is engineered to all of these specifications and is available with custom yoke configurations, tube lengths, and clutch settings for OEM and aftermarket buyers worldwide.

The flail mower gearbox, also referred to as the flail shredder gearbox or mulcher gearbox, is the mechanical heart of the shredder machine. It receives the longitudinal rotational input delivered by the PTO driveline shaft and transforms it into the transverse, high-speed rotor rotation required to drive the flail knife blades at the effective cutting velocity needed to shred heavy vegetation. In the John Deere 100 Series flail shredders, the gearbox achieves this through a combination of bevel gears (to redirect the axis of rotation by 90 degrees) and spur gear stages (to achieve the correct speed ratio between the 1000 RPM PTO input and the flail rotor's operating speed).

The relationship between the flail shredder PTO shaft and the flail mower gearbox is one of mutual dependency. The gearbox specifies the exact input spline size, torque capacity, and speed ratio that the PTO shaft must match. If the PTO shaft transmits more shock torque than the gearbox is rated to absorb, internal gear failure results. Conversely, if the PTO shaft is undersized and slips or fails during peak loading, the shredder loses productivity and the PTO shaft itself wears prematurely. CMN Transmission manufactures both flail shredder PTO shafts and flail mower gearboxes as complementary product lines, allowing customers to source a matched, optimized power transmission system for their specific John Deere or other brand flail shredder from a single, certified supplier.

¿Por qué elegir los ejes de toma de fuerza agrícolas de CMN Transmission?

CMN Transmission is a specialist manufacturer of agricultural PTO shafts, tractor PTO drive shafts, flail mower gearboxes, and related drivetrain components, supplying customers across six continents from a state-of-the-art 20,000 m² production facility. Founded on the principle that farmers, contractors, and equipment dealers deserve access to precision-engineered driveline components without paying premium OEM prices, CMN has spent years building a manufacturing capability and quality management system that competes directly with the world's leading Western agricultural drivetrain brands.

Our facility holds ISO 9001, CE, and TS16949 certifications, independently audited annually to verify that every PTO driveline shaft we produce meets or exceeds the dimensional accuracy, material specification, heat treatment, and surface finish requirements demanded by professional agricultural users. We operate complete in-house processing including forging, CNC turning and milling, heat treatment, grinding, phosphate treatment, and assembly, giving us full control over quality at every stage of production without reliance on sub-contractors.

We specialize in serving B2B customers including agricultural machinery OEMs, regional equipment dealers, and large farm operations who require reliable supply, responsive technical support, competitive pricing, and the flexibility to specify custom PTO shaft configurations. Our engineering team can work from your drawing, sample, or verbal description to produce matched, optimized shaft solutions for any tractor-implement combination. Contact the CMN Transmission team today for product specifications, custom shaft configurations, bulk pricing, OEM partnership inquiries, and fast global shipping on PTO shaft for flail shredder products. Our technical sales team is ready to help you find the exact agricultural PTO shaft solution for your John Deere 115, 120, or any other flail shredder application.

Preguntas frecuentes

Q: What PTO shaft size fits the John Deere 115 and 120 flail shredders?
A: The John Deere 115 and 120 drawn flail shredders use a standard 1-3/8" x 21-spline tractor-end connection for 1000 RPM PTO operation. The implement-end yoke also uses a 1-3/8" x 6-spline connection to mate with the shredder gearbox input stub. CMN Transmission's CAT4 / Series 4 PTO shaft for John Deere flail shredder is supplied with these exact spline specifications as standard, with a 1-3/8" x 21-spline 1000 RPM version available on request for tractors equipped with 1000 RPM PTO outputs.

Q: Is this a direct replacement of a Weasler PTO shaft for the John Deere 115 / 120?
A: Yes. CMN Transmission's PTO driveline shaft for the John Deere 115 and 120 flail shredders is engineered as a dimensional equivalent to the Weasler OEM shaft supplied with these machines. The collapsed and extended lengths, yoke spline sizes, series torque rating, and guard dimensions all match the original Weasler specification, enabling a direct bolt-on replacement of Weasler PTO shaft without modification. Customers consistently confirm that the CMN shaft installs without shimming, adapters, or adjustment to any tractor or implement component.

Q: What is the difference between a 540 PTO shaft and a 1000 PTO shaft, and which do I need?
A: The 540 PTO shaft standard uses a 1-3/8" diameter stub with 6 splines and rotates at 540 RPM at rated engine speed. The 1000 PTO shaft or 1000 rpm PTO shaft uses a 1-3/8" diameter stub with 21 splines (or a 1-3/4" stub with 20 splines for heavy-duty 1000E applications) and rotates at 1000 RPM. For the John Deere 115 and 120 shredders, which are rated for tractors in the 40-75 HP range, the standard 540 RPM configuration is correct. If your tractor only has a 1000 RPM PTO output, please contact CMN Transmission for the appropriate custom PTO shaft configuration.

Q: What is a slip clutch PTO shaft and why is it important for flail shredders?
A: A slip clutch PTO shaft incorporates a friction disc clutch assembly set to disengage automatically when the transmitted torque exceeds a preset limit. This is critically important for flail shredders because the flail rotor frequently strikes rocks, thick stumps, and buried objects during operation, generating instantaneous torque spikes that can be five to ten times the normal operating torque. Without a slip clutch, these spikes propagate through the driveline and can shatter the shredder gearbox internals or damage the tractor's PTO output gear. Unlike a shear bolt PTO shaft, which requires stopping and replacing a bolt after each overload event, the slip clutch re-engages automatically once the torque returns to normal, dramatically reducing downtime.

Q: How do I measure the correct PTO shaft length for my John Deere 115 or 120?
A: To measure the correct PTO shaft length for your specific tractor and shredder combination, first hitch the shredder to the tractor in the working position at the minimum anticipated hitch extension. Measure the center-to-center distance from the tractor PTO stub face to the shredder gearbox input stub face. This measurement should fall within the collapsed length range of the shaft with a minimum of 150 mm of tube overlap remaining. Then measure at maximum hitch extension to confirm the shaft can extend adequately without the inner tube pulling fully out of the outer tube. If in doubt, contact CMN Transmission with your measurements for PTO shaft dimensions verification and recommendation.

Q: Can I order a custom PTO shaft with non-standard dimensions or spline sizes?
A: Yes. CMN Transmission specializes in custom PTO shaft manufacturing for OEM equipment builders, agricultural machinery dealers, and fleet operators who require specific PTO shaft sizes, tube lengths, spline configurations, PTO shaft yoke styles, or branded packaging. We support custom cross-and-bearing sizes for non-standard PTO shaft u-joint applications, alternative clutch torque settings, and modified PTO shaft adapter flanges for non-standard gearbox input configurations. Minimum order quantities for custom production are flexible and competitive. Please contact our technical sales team with your drawing, sample, or detailed specification.

Q: How often should I grease the PTO shaft on my John Deere flail shredder?
A: We recommend greasing all PTO shaft parts including the universal joint cross-and-bearing nipples and the telescoping tube profile every 8 hours of field operation under standard agricultural conditions. In dusty, sandy, or wet working environments, shorten this interval to every 4 hours. Use EP2 lithium-complex grease and purge each nipple until fresh grease appears at the bearing seal lip to confirm full replacement of old, contaminated grease. Consistent lubrication is the single most cost-effective maintenance action you can take to extend the service life of your agricultural PTO shaft.

Q: Are PTO shaft guards required by law, and is the guard included with this shaft?
A: Yes, a PTO shaft guard is legally mandatory in virtually all jurisdictions under agricultural machinery safety regulations, including OSHA standards in the USA, EU Machinery Directive 2006/42/EC in Europe, and equivalent national legislation in Australia, Canada, and most other agricultural markets. The CMN Transmission PTO shaft for John Deere 115 / 120 includes a full-length CE-certified PTO shaft cover with retaining chains as standard equipment. The guard telescopes with the shaft to maintain full coverage at all operating lengths and must be installed and both chains attached before the tractor PTO is engaged. Operating without the guard is both illegal and extremely hazardous.

Q: What certifications does CMN Transmission's PTO shaft hold?
A: CMN Transmission's PTO drive shafts are produced under ISO 9001 quality management system certification, CE certification confirming compliance with applicable EU machinery safety directives, and TS16949 automotive quality management certification, reflecting the precision manufacturing standards applied throughout our production facility. These certifications are verified by independent third-party auditors and full certification documentation is available to customers upon request. Our manufacturing facility covers over 20,000 m² and is equipped with complete in-house forging, heat treatment, machining, assembly, and testing equipment to maintain rigorous quality control at every production stage.

Q: What is the difference between a shear pin PTO shaft and a slip clutch PTO shaft for flail shredders?
A: A shear pin PTO shaft or PTO shaft shear bolt design uses a sacrificial metal pin or bolt that breaks under overload, physically separating the driveline halves to prevent damage. While effective, this design requires stopping work, disassembling the coupling, and replacing the PTO shaft shear bolt every time an overload occurs, which can be frequent in flail shredder operation. A PTO shaft with slip clutch, by contrast, uses spring-loaded friction discs that slip momentarily when overloaded and then re-engage automatically once the torque returns to normal. For flail shredders that encounter frequent obstructions, the slip clutch design is significantly more productive and is the recommended choice for the John Deere 115 and 120 applications.

Opiniones de los clientes

Marcus Hollingsworth, Gerente de Granja, Estados Unidos
"Been running a John Deere 120 on our 120-acre cattle farm in central Texas for the better part of six years now, and we went through two Weasler shafts before I found CMN Transmission online. Ordered the CAT4 unit with slip clutch as a replacement of Weasler PTO shaft and honestly didn't expect much for the price difference. Thing is, it slid straight onto our 1-3/8" x 6-spline stub without any adapter or shimming needed. We've had it on the machine for just over a full season now, probably 220 hours, cutting heavy brush and thick Johnson grass along the fence lines. Zero slippage, zero vibration, guard is still solid. Build quality is noticeably better than the last aftermarket unit we tried. Would order again without a second thought."

James. Thornton, Agricultural Contractor, Australia
"Run a contracting business in Queensland, shredding everything from green cane trash to dried kikuyu pasture on behalf of about eight different farm clients. The conditions here are brutal on equipment, especially on the driveline. I ordered a Series 4 heavy duty PTO shaft from CMN after my original unit on the 115 developed play in both U-joints after about 600 hours. The new shaft arrived in 12 days to Brisbane, which I was happy with. Fit was dead on. I've since put over 300 hours on it across five different properties, including some extremely tough cane trash work, and the universal joints are still tight, the tube slides smoothly, and the slip clutch hasn't given me any trouble. For the price, the quality is really impressive. I'm recommending CMN to a mate who runs a similar setup on a 120."

Pierre Lefebvre, Farmer, France
"I use my John Deere 115 to shred crop residues in my cereal fields in the Beauce region. When I needed a new PTO shaft I checked several suppliers but CMN offered the best price without compromising on certifications. The shaft arrived quickly, well packaged, and the PTO shaft dimensions were exactly as specified. I especially appreciated the detailed installation guide included in the box. The slip clutch saved my gearbox twice already during the first season when I hit some buried stones I didn't know were there. Very happy with the purchase. For the price versus quality ratio, it's hard to beat for a European farmer watching costs carefully this season."

Klaus Weber, Farm Owner, Germany
"As a farmer in Bavaria with ISO and CE compliance expectations for all equipment I run, I was naturally skeptical about sourcing a PTO shaft for John Deere flail shredder from a Chinese manufacturer. But CMN provided full documentation: ISO 9001 certificate, CE declaration of conformity, and the TS16949 certificate, which no other supplier at this price point could offer. The technical data sheet matched our existing Walterscheid unit in every critical dimension. We installed the shaft on our 120 in April and have been running it through hay and straw work until October without a single issue. The engineering precision is evident when you hold it next to the OEM part. A professional product at a fair international price. We have already ordered two more units for our other machines."

William Blackmore, Estate Manager, United Kingdom
"I manage a 600-acre estate in Lincolnshire and we use the John Deere 115 shredder extensively for hedgerow base management and grass strip maintenance across the whole property. I was a bit hesitant about the customer service side when ordering from overseas but the CMN team responded to every email within a day and gave me the exact shaft specification I needed including a 1000 PTO shaft version for our 1000 RPM tractor. The shaft itself is well made, heavier than I expected which suggests they haven't skimped on material, and the guard is decent quality. Delivery to the UK took nine working days which was fine. I'd mark them down slightly only because the tracking information wasn't updated regularly during transit, but the product is exactly what we needed."

Rafael Monteiro, Crop Contractor, Brazil
"I work as an agricultural services contractor in the interior of São Paulo and use the John Deere 120 for shredding sugarcane straw and brachiaria grass. I purchased a CAT4 PTO shaft for the straw shredder from CMN and the cost was very competitive compared to local distributors. The product arrived in 14 days, with excellent packaging and no damage. The fit onto the 6-spline hub was perfect, with no play. I have already operated the shaft for over 400 hours and it is performing very well so far. The overload clutch functioned perfectly on at least ten occasions when the rotor hit stumps on the ground. I am very satisfied with the purchase. I have already recommended it to two colleagues who also work with John Deere shredders in the region."

David Kowalski, Farmer, Canada
"Located in southern Ontario. Ordered a CAT4 tractor PTO drive shaft for my John Deere 115 to replace a shaft that was showing visible wear on the U-joint cups after about four seasons. The CMN unit arrived quickly from their warehouse and the fitment was straightforward. The new shaft installed in under fifteen minutes with basic tools. I greased everything before first use as instructed and have been running it through late-season corn stalk shredding and cover crop mulching without any issue. The slip clutch engagement feels very positive and I've confirmed it kicks out properly on a couple of test overloads. Build quality feels solid, heavier steel than some of the budget aftermarket units I've seen. Genuinely happy with this purchase and would recommend it to other John Deere 115 / 120 operators in Canada."

Gianni Ferrara, Agricultural Parts Dealer, Italy
"We are an agricultural parts dealership in Emilia-Romagna and have been selling cardan shafts to agricultural professionals for twenty years. I compared the CMN product with Italian and German brand shafts in the same category and can say that the construction quality and dimensional tolerances are absolutely competitive. The universal joints are robust, the tube profiles slide very smoothly, and the slip clutch is well calibrated. The price allows us attractive resale margins without compromising end-customer satisfaction. We have added the models for John Deere 115 and 120 to our official catalog. CMN is a professional supplier that is a pleasure to work with; they respond quickly and the quality documents are always complete and correct."

Michael Tanner, Farm Owner, New Zealand
"Running a mixed sheep and crop farm in the Waikato and I've had the John Deere 115 for about eight years. The original PTO shaft finally gave out a couple of seasons back and I went with a CMN unit on recommendation from a farmer contact in Hawke's Bay. The shaft has now done two full seasons of fairly intensive work, including some very tough thistle and gorse seedling shredding on paddocks being brought back into production. I grease it every week during peak season and the U-joints and tube are still in excellent condition. The after-sales support from CMN was also impressive when I had a question about the slip clutch adjustment; they responded with a clear technical explanation within 24 hours. For value and durability in the NZ context, I'm very satisfied and would buy from CMN again."