PTO Shaft for New Idea Discbine 5512 Disc Mower

Reliable PTO Shaft for New Idea Disc Mower Models

PTO Shaft for New Idea Disc Mower Model: 5512 Disc Mower

The PTO shaft for New Idea Discbine 5512 Disc Mower from CMN Transmission is a precision-engineered tractor PTO drive shaft designed as an OEM-equivalent replacement for the factory-fitted Weasler 55N double-CV assembly. The New Idea 5512 Discbine is a demanding machine that integrates high-speed disc cutting with aggressive conditioning rolls, placing substantial cyclic torque loads on the PTO driveline shaft during every pass. Our CAT 6 Double Constant Velocity shaft absorbs those load fluctuations smoothly, maintaining consistent rotational speed delivery to the discbine gearbox regardless of the working angle between tractor and implement. The main shaft series accommodates the 1-3/8"-21 spline standard tractor output and connects to the implement's 1.5" x 23-spline input shaft without modification, making this a true drop-in replacement that saves valuable field time.

Whether you are cutting first-cut alfalfa in tight contoured fields, maintaining roadside drainage ditches, or producing fermented silage at scale, the operating geometry between a compact utility tractor and the New Idea 5512 demands a disc mower PTO shaft that can handle extreme offset angles without velocity fluctuation or vibration. This agricultural PTO shaft features dual constant-velocity joints rated to 80 degrees on the tractor half and 50 degrees on the implement half, ensuring smooth power delivery even when navigating headland turns or working on irregular terrain. Paired with a full-coverage PTO shaft guard, hardened PTO shaft yoke connections, and a telescoping PTO shaft tube assembly, this heavy duty PTO shaft is built to deliver reliable seasons of service in the most demanding hay and forage operations.

Albero principale: CAT 6 Doppio albero a velocità costante

L'equipaggiamento originale prevede un giunto Weasler da 55N a 80 gradi sul lato trattore e un giunto omocinetico a 50 gradi sulla erpice a dischi. Gli alberi di ingresso sono solitamente da 1,50" x 23 scanalature.

Specifiche tecniche

Features of PTO Shaft for New Idea 5512 Disc Mower

1. CAT 6 Double Constant Velocity Design
The dual CV joint configuration is the defining feature of this PTO drive shaft. The tractor-side CV joint is rated to 80 degrees of articulation while the discbine-side CV accommodates 50 degrees, eliminating the velocity fluctuation and vibration that plague standard cardan shaft designs at high operating angles. This translates directly to smoother operation, reduced driveline stress, and longer service life for the 5512 Discbine's internal gearbox and disc bearings.

2. Direct OEM-Fit Spline Connections
This replacement of Weasler PTO shaft maintains precise OEM spline dimensions: a 1-3/8"-21 spline PTO shaft yoke on the tractor side and a 1.5" x 23-spline connection at the implement end. No adapters, no shimming, and no machining are required. The shaft slides onto the tractor's 540 or 1000 rpm output stub and into the 5512's input gearbox in minutes, exactly as the original Weasler assembly did, making this a true drop-in tractor PTO shaft replacement.

3. Full-Length Safety Guard System
The assembly ships with a complete PTO shaft guard and PTO shaft cover that encase the entire rotating assembly from tractor yoke to implement connection. The guard is manufactured from impact-resistant polymer and is fully compliant with CE safety standards. It provides effective protection for both operators and bystanders against entanglement with the exposed rotating shaft, meeting the requirements for commercial farm operations and roadside mowing applications under international safety regulations.

4. Telescoping PTO Shaft Tube Assembly
The PTO shaft tube features a precision-machined inner and outer profile with adequate telescoping stroke to accommodate the full range of 5512 Discbine hitch positions and terrain-following lift heights. The PTO shaft tubing profile maintains sufficient overlap throughout the operating range to prevent disengagement under severe compression, such as when the mower follows a deep depression at full working speed. Tight tolerances on the PTO shaft dimensions minimize rotational slop and the associated vibration that prematurely fatigues PTO shaft u joint components.

5. Precision CNC Machined & Heat Treated Components
Every PTO shaft parts component in this assembly is manufactured on modern CNC machining centers to tight dimensional tolerances, then subjected to controlled heat treatment processes to achieve the correct surface hardness and core toughness. The PTO shaft universal joint bearing cups are precision-ground for consistent cross-kit fit, and all cross-and-bearing assemblies are pre-greased and sealed. This manufacturing standard ensures that this heavy duty PTO shaft performs equivalently to OEM components at a fraction of the dealer replacement cost.

6. ISO 9001 & CE Certified Manufacturing
CMN Transmission's manufacturing processes for this agricultural PTO shaft are audited and certified under both ISO 9001 quality management standards and CE conformity requirements. This means every tractor PTO drive shaft leaving our facility has been produced under documented process controls covering material traceability, dimensional inspection, and final functional testing. For dealers and distributors supplying commercial operators, this certification provides the documented assurance of quality and safety compliance required when reselling PTO shaft parts into regulated markets.

Working Principle of Disc Mower PTO Shaft

The PTO driveline shaft for disc mower operation begins at the tractor's power take-off (PTO) stub shaft, which rotates at either 540 rpm or 1000 rpm depending on the tractor's selected output speed and the discbine's input requirement. The tractor's PTO stub engages with the 1-3/8"-21 spline inner yoke at the tractor end of this tractor PTO shaft assembly, creating a mechanical lock between the tractor drivetrain and the entire driveline. From this engagement point, torque flows through the tractor-side constant velocity joint, through the telescoping PTO shaft tube, and out through the implement-side CV joint before entering the disc mower input shaft.

The critical engineering advantage of this PTO drive shaft over a standard Cardan (universal joint) shaft lies in the double CV joint arrangement. In a conventional single-cardan or double-cardan fixed shaft, rotational velocity at the output end varies cyclically whenever the shaft operates at an angle, a phenomenon known as secondary couples. At typical disc mower operating speeds, these velocity fluctuations introduce torsional vibration that fatigues internal gearbox components, loosens fasteners, and accelerates wear in the disc bearing assemblies.

The 55N CAT 6 double CV design eliminates this issue by using a centering ball-and-socket assembly between the two CV joint halves. This centering mechanism bisects the operating angle automatically, so each CV joint half operates at exactly half the total shaft-to-shaft angle. Because each constant velocity joint delivers true constant velocity rotation at any operating angle within its rated range, the two halves together produce perfectly constant output speed regardless of the total articulation up to 80 degrees on the tractor side and 50 degrees on the implement side. This is why the New Idea 5512 was originally designed with a double CV disc mower PTO shaft: the machine's three-point hitch geometry and folding transport position require a shaft capable of large angular displacements without any speed variation.

As the 5512 Discbine follows ground contours, raises over obstacles, or transitions from work position to transport position, the effective distance between the tractor PTO stub and the implement input shaft changes continuously. The inner and outer PTO shaft tubing profiles of this PTO driveline shaft telescope to accommodate these length changes while maintaining the mechanical connection and the rotational drive. The profile design, typically a splined or lemon-bore cross-section, transmits torque through the telescoping joint while allowing smooth linear movement. Adequate overlap between the inner and outer tube sections must be maintained at maximum extension to prevent disengagement; CMN Transmission's PTO shaft dimensions are verified against the 5512's documented operating range to ensure compliance.

Scenari applicativi

1. Forage Harvesting
Mowing high-value forage crops such as alfalfa, red clover, and perennial ryegrass at the precise growth stage requires consistent cutting speed that only a properly functioning disc mower PTO shaft can deliver. The 55N CV assembly maintains uniform disc RPM from the first swath to the last, ensuring clean stem cuts that maximize nutritional content and minimize field losses whether the crop is destined for dry hay bales or direct-chop green feed for dairy operations.

2. Hay Harvesting
The primary application for this PTO shaft for New Idea discbine. The 5512 Discbine cuts grasses and legumes at high disc speed while the integrated conditioning rolls crimp and crack the plant stems, dramatically accelerating field drying before baling. The double CV agricultural PTO shaft maintains precise rotational speed to the disc head even at maximum hitch offset, ensuring clean, consistent cuts at full ground speed across large hay fields.

3. Produzione di insilato
Cutting crops at elevated moisture levels for fermented silage storage in bunkers, pits, or wrapped bales places even higher demands on the PTO driveline shaft due to the dense, heavy crop volumes involved. This heavy duty PTO shaft CAT 6 assembly handles the sustained high-torque loads of silage-stage cutting without heat build-up or CV joint fatigue, while the telescoping tube accommodates the faster ground speeds typical of silage-rate harvesting operations.

4. Cover Crop Termination
Cutting down established winter cover crops such as cereal rye, hairy vetch, or Austrian winter peas ahead of planting season is an increasingly common use for disc mower setups. The high disc speed of the 5512 produces a uniform, finely-cut biomass layer that lies flat and suppresses early-season weed pressure while decomposing quickly into the soil surface. A reliable PTO drive shaft for discbine ensures maximum ground speed during the tight window between termination and planting.

5. Pasture Management
Topping and trimming grazing pastures to remove rank, stemmy growth and control weeds is a recurring task that demands a reliable tractor PTO shaft capable of starting and stopping frequently across irregular paddock terrain. The double CV design is particularly valuable in pasture work, where small tractors with short wheelbases operate the discbine at tighter turning radii and sharper hitch angles than typical broad-acre haymaking operations. Consistent cut quality encourages fresh, uniform re-growth for grazing livestock.

6. Roadside & Specialty Mowing
Maintaining roadsides, drainage ditches, airport buffer strips, and conservation headlands requires precise, controlled cutting in geometrically irregular areas where the tractor frequently changes heading and hitch angle. The 80-degree tractor-side CV articulation of this PTO shaft for New Idea disc mower comfortably handles the tight offset angles encountered in these applications, while the full-coverage PTO shaft guard provides essential debris-containment protection when operating near infrastructure, traffic, or the public.

Installation of PTO Drive Shaft for Disc Mower

1. Safety Preparation
Before beginning any PTO shaft installation, disengage the tractor PTO, place the transmission in park or neutral, apply the parking brake, and shut off the engine. Allow all rotating components to come to a complete stop. Verify that the old PTO shaft assembly has been fully removed and that the tractor PTO stub and implement input shaft are clean, undamaged, and free of corrosion or impact deformation that might prevent proper spline engagement.

2. Verify PTO Shaft Length
Before mounting, measure and confirm the correct PTO shaft length in both the working position (fully lowered to cutting height) and the transport/raised position. Ensure that the telescoping PTO shaft tube does not fully compress or fully extend under either condition. A minimum of one-third overlap in the compressed position is required to maintain adequate torque transmission through the PTO shaft tubing profile without risk of tube separation.

3. Attach Implement End First
Begin installation at the implement end. Slide the 1.5" x 23-spline PTO shaft yoke onto the New Idea 5512's input shaft, aligning the splines carefully. Push the yoke fully onto the stub shaft and secure it using the locking pin or snap ring as specified in the original equipment manual. Verify that the locking mechanism has positively engaged and that the yoke cannot be pulled off by hand before proceeding to the tractor connection.

4. Connect Tractor End
With the tractor stationary, slide the 1-3/8"-21 spline yoke of the tractor side CV half onto the tractor's PTO stub shaft. Rotate the yoke slightly if necessary to align the splines, then push fully onto the stub shaft until the locking collar clicks positively into the stub's retaining groove. Tug the assembled Albero cardanico del trattore rearward to confirm secure engagement. Never operate the tractor with an unlocked or partially engaged PTO yoke connection.

5. Secure the Safety Guard
Attach the PTO shaft guard chain or strap anchors to the fixed points on both the tractor and the implement to prevent the guard from rotating with the shaft. Ensure the PTO shaft cover is fully seated over the entire shaft assembly with no gaps that expose rotating parts. The guard must remain stationary during operation; a spinning guard is itself a safety hazard and indicates that anchor chains have not been connected properly.

6. Initial Run and Inspection
After completing the installation, engage the PTO at low engine RPM and observe the shaft assembly for any unusual vibration, noise, or wobble. Disengage and re-inspect all connection points if any anomaly is detected. After the initial test run, shut down and apply grease to all specified lubrication points on the PTO shaft u joint cross kits and the telescoping tube profile according to the maintenance schedule. Check again after the first hour of cutting operation.

How to Choose the Right PTO Shaft for Discbine

1. Match the Spline Specification Exactly
The single most critical selection criterion for any tractor PTO shafts replacement is confirming the spline count and diameter at both ends. The New Idea 5512 uses a 1.5" x 23-spline input shaft on the implement side, while most compact and utility tractors use the 1-3/8"-21 spline output on the 540 PTO shaft speed range. Verify your tractor's actual spline specification in its operator manual before ordering. Some tractors offer both 540 and 1000 rpm stubs with differing spline counts.

2. Measure the Required PTO Shaft Length
Measure the distance from your tractor's PTO stub to the implement input shaft center in both the working position and the fully raised position. Choose a PTO shaft length that provides adequate compressed length without bottoming out the tube and adequate extended length without reducing overlap below the safe minimum. If possible, compare the PTO shaft dimensions of the replacement with those printed on the original shaft's data label. For custom PTO shaft requirements, CMN Transmission can supply to specific dimensions.

3. Select the Correct CV Angle Rating
The New Idea 5512 Discbine was factory-specified with a 55N 80-degree tractor-side and 50-degree implement-side CV shaft for a reason: the machine's geometry requires those angle ratings. Using a PTO drive shaft with lower CV angle ratings can result in binding at full articulation, premature CV joint failure, and driveline vibration. Always match or exceed the OEM CV angle rating when selecting a replacement of Weasler PTO shaft or any aftermarket alternative for this application.

4. Choose the Appropriate Overload Protection
For rocky fields or silage-rate cutting applications where disc blade strikes are frequent, a slip clutch PTO shaft configuration provides automatic torque limiting and instant re-engagement without stopping to replace hardware. For lighter-duty hay applications on cleaner fields, a shear pin PTO shaft or shear bolt PTO shaft offers simpler, lower-cost overload protection. Consider the field conditions, crop density, and frequency of obstruction strikes when choosing between slip clutch and shear bolt overload protection on your PTO shaft parts assembly.

5. Verify Certification and Quality Standards
When sourcing an aftermarket agricultural PTO shaft, request confirmation of ISO 9001 and CE certification from the supplier. These certifications indicate that the shaft has been manufactured under audited process controls and tested to defined performance standards. Price-only purchasing decisions for rotating driveline components are a false economy. A sub-standard PTO shaft u joint or PTO shaft yoke failure at full working speed can cause serious implement damage or, in the worst case, a safety incident involving the PTO shaft guard and the PTO driveline assembly.

6. Confirm Supplier Technical Support
For non-standard applications, unusual PTO shaft sizes, or when migrating between tractor models with different spline specifications using a PTO shaft adapter, choose a supplier whose technical team can verify compatibility before shipping. CMN Transmission's pre-sale consultation service confirms spline configurations, PTO shaft dimensions, and clutch specifications for your exact tractor-implement combination, eliminating costly returns and delays at the start of the cutting season.

Risoluzione dei problemi più comuni

1. Vibrazioni eccessive durante il funzionamento
Vibration in the PTO driveline shaft is most commonly caused by worn or seized PTO shaft u joint cross-and-bearing kits, a bent inner tube in the PTO shaft tube assembly, or inadequate lubrication in the telescoping profile. Check all U-joint bearings for play or roughness by hand, inspect the PTO shaft tubing for visible bending, and re-grease all lubrication nipples. If the CV joints feel rough when rotated by hand at zero torque, replace the cross kit immediately before the next operation to prevent progressive failure.

2. Shaft Disconnects Under Load
If the tractor PTO drive shaft assembly separates from the tractor stub or implement input during operation, the most likely cause is a worn or incorrectly seated locking collar, a damaged locking groove on the stub shaft, or an undersized yoke bore that no longer grips the splines correctly. Inspect the locking mechanism on both PTO shaft yoke connections and replace worn locking collars immediately. Operating with an unsecured PTO shaft adapter or yoke connection is a serious safety hazard that can result in the shaft becoming a projectile at operating speed.

3. Slip Clutch Slipping Continuously
A slip clutch PTO shaft that slips constantly during normal cutting, not just after a blade strike, indicates that the clutch spring preload has been set too low, or that the friction discs are worn and no longer transmitting adequate torque at the specified spring compression. Refer to the manufacturer's torque specification for the New Idea 5512 input and re-adjust the slip clutch to the correct preload setting. If the discs are glazed or scored, replace the friction disc set rather than simply increasing spring preload to compensate for worn surfaces.

4. Frequent Shear Bolt Failures
If the PTO shaft shear bolt on a shear bolt PTO shaft configuration fails repeatedly without obvious blade strikes, the cause is often the use of an incorrect-grade replacement bolt. The shear pin PTO shaft system is calibrated for a specific bolt grade and diameter; substituting a harder or softer grade changes the protection threshold. Always use the exact shear bolt specification in the parts manual. Frequent shear bolt breakage without obstruction contact can also indicate excessive disc blade imbalance or a partially seized disc gearbox bearing that spikes torque under load.

5. Difficulty Telescoping / Stuck Tube
A PTO shaft tube that is difficult to extend or retract is almost always caused by dry, contaminated, or corroded profiles in the inner and outer PTO shaft tubing bore. This is particularly common in older shafts where the guard chain holes have allowed water ingress. Separate the two tube sections, clean the profile bores thoroughly of old dried grease and any debris, apply a fresh coat of high-pressure grease specifically formulated for spline telescoping applications, and reassemble. In severe cases of internal corrosion, the tube set should be replaced to prevent binding under field conditions.

6. Guard Spinning with the Shaft
A PTO shaft guard that rotates with the shaft during operation is an immediate safety hazard and a common source of operator confusion after a shaft replacement. The guard must be anchored at both ends using the supplied chain or strap connections to fixed points on the tractor and implement, respectively. Verify that both anchor points are connected and taut before each use. If the bearing at either end of the PTO shaft cover that allows the guard to remain stationary while the shaft rotates is seized or worn, the bearing should be replaced as a standalone maintenance item.

Disc Mower PTO Shaft & Disc Mower Gearbox

The disc mower PTO shaft is the mechanical link between the tractor's power take-off output and the disc mower's internal input shaft. Its function is deceptively simple in description but demanding in execution: transfer rotating power from a moving tractor to a separate, independently suspended implement over a continuously changing angular and linear offset. The double CV design of this PTO shaft for New Idea disc mower ensures that rotational speed delivered to the implement's input remains perfectly constant, a non-negotiable requirement for disc mower operation, where any speed variation at the input translates directly into uneven disc tip speed, poor cut quality, and accelerated disc head gearbox wear.

The PTO driveline shaft must also accommodate the range of movement imposed by the three-point hitch throughout the working cycle. The telescoping PTO shaft tube extends and compresses with each change of implement height, while the CV joints articulate smoothly through headland turns and terrain-following movements. A quality agricultural PTO shaft rated to the correct PTO shaft sizes and equipped with the appropriate PTO shaft guard and overload protection, therefore, a core safety and performance component, not a simple accessory.

The disc mower gearbox, also known as the disc mower cutterbar gearbox or center gearbox, receives the rotational input from the PTO drive shaft and distributes power across the cutting discs through an internal gear train of bevel and spur gears. On a machine like the New Idea 5512 Discbine, the central gearbox drives individual disc gearboxes at each cutting disc station along the cutterbar, each spinning its disc at extremely high RPM to achieve the blade tip speed required for clean, efficient grass cutting.

The relationship between the PTO shaft for New Idea discbine and the disc mower gearbox is a performance partnership: the quality and specification of the PTO shaft determines the quality of the rotational input the gearbox receives. A worn or mismatched tractor PTO shaft that introduces speed fluctuations, vibration, or angular shock loads into the system will shorten gearbox bearing and gear life dramatically, often causing expensive internal failures that far exceed the cost of the PTO shaft itself. Equally, a gearbox with worn seals or damaged input bearing will generate heat and vibration that shortens the PTO shaft u joint and CV joint life prematurely. For this reason, CMN Transmission recommends inspecting and, if necessary, replacing both the disc mower PTO shaft and the disc mower gearbox simultaneously when either component shows signs of advanced wear.

Perché scegliere gli alberi cardanici agricoli di CMN Transmission?

CMN Transmission (Korea) stands as one of the world's leading suppliers of industrial and agricultural power transmission solutions. Our product range spans 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, we maintain an inventory of more than 150,000 standard stock products and serve 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 our commitment to factory-direct pricing without sacrificing quality. As an integrated manufacturing and trading company, we eliminate the multiple dealer markups that inflate the cost of OEM replacement PTO shaft parts. Every tractor PTO shaft we produce is manufactured using advanced CAD design, precision CNC machining, modern heat treatment processes, and rigorous quality testing. Our products carry both ISO 9001 and CE certifications, ensuring compliance with international safety and performance standards. We also hold the TS16949 automotive quality management certification a standard that exceeds typical agricultural parts manufacturing requirements and reflects our commitment to precision and process control across our full product range.

Beyond product quality, we offer a level of customer support that large OEM brands often cannot match. Our technical team provides pre-sale consultation to confirm spline configurations, PTO shaft length and PTO shaft dimensions, and clutch specifications for your exact tractor and implement combination, whether you need a standard 540 PTO shaft, a 1000 rpm PTO shaft, or a fully custom PTO shaft built to non-standard specifications. We offer customized PTO shaft parts for non-standard applications and provide detailed dimensional drawings upon request.

After the sale, our one-stop after-sales service ensures that replacement components, technical guidance, and warranty support are always accessible. Our warehouse of 150,000+ stocked SKUs means that even urgent repeat orders are fulfilled rapidly, minimizing downtime during critical harvesting windows. When you choose CMN Transmission, you are choosing a partner committed to keeping your equipment running efficiently, reliably, and safely, whether you are a single-farm operator replacing one disc mower PTO shaft, or an international distributor placing multi-container annual orders for the full range of tractor PTO shafts and PTO driveline shaft products across six continents.

Domande frequenti

Q: Is this PTO shaft a direct replacement for the original Weasler 55N unit on the New Idea 5512 Discbine?
A: Yes. This assembly is engineered as a direct replacement of Weasler PTO shaft for the factory-installed 55N double CV unit on the New Idea 5512. The tractor end uses the identical 1-3/8"-21 spline connection, the implement end uses the 1.5" x 23-spline yoke, and the CV articulation angles of 80 degrees on the tractor side and 50 degrees on the implement side match the OEM specification. No adapters, modifications, or additional hardware are required for installation on an unmodified 5512 Discbine.

Q: What is the difference between a 540 PTO shaft and a 1000 PTO shaft for disc mower applications?
A: A 540 PTO shaft is designed for tractors operating at 540 rpm PTO output, which is standard on most compact to mid-range utility tractors. A 1000 PTO shaft (also called a 1000 rpm PTO shaft) is designed for tractors operating at 1000 rpm PTO output, common on higher-horsepower row-crop and larger utility tractors. The New Idea 5512 Discbine can be configured for either input speed consult your implement's original specifications and your tractor's PTO output to confirm the correct operating speed and associated spline specification before ordering.

Q: Can I order just the tractor-side or implement-side CV half, rather than the complete assembly?
A: Yes. CMN Transmission offers all three configurations: the complete 55N 80x50 double CV assembly, the implement-side 55N 50-degree CV half (with 1.5" x 23-spline yoke), and the tractor-side 55N 80-degree CV half (with 1-3/8"-21 spline yoke). If only one end of your existing PTO driveline shaft is damaged and the other remains serviceable, ordering the half-shaft is a cost-effective repair option. Contact our technical team to confirm part compatibility with your remaining components.

Q: How do I measure the correct PTO shaft length for my New Idea 5512 setup?
A: With the 5512 Discbine attached to your tractor at the working hitch setting, measure the distance between the face of the tractor PTO stub shaft and the face of the implement input shaft. Then raise the implement to its maximum transport height and measure again. The correct PTO shaft length must accommodate both measurements: it should not compress so far that the tube sections bottom out, and it should not extend so far that tube overlap drops below one-third of the total PTO shaft tube length. If you are uncertain, send us both measurements and we will confirm the correct shaft specification.

Q: What is the correct grease type and lubrication interval for this agricultural PTO shaft?
A: Use a high-quality NLGI Grade 2 lithium-complex or moly-fortified grease for all PTO shaft u joint cross kits and grease nipples. Lubricate the cross-and-bearing assemblies every 8 operating hours or at the start of each working day during intensive season use. The inner and outer telescoping PTO shaft tubing profiles should be cleaned and re-greased with a tube grease or anti-seize compound every 50 operating hours or at the beginning and end of each season. The CV joint centering ball should be greased via its dedicated nipple according to the maintenance schedule.

Q: What does the PTO shaft guard and cover include, and does it meet safety standards?
A: The assembly includes a full-length PTO shaft guard and PTO shaft cover system that encases the entire rotating assembly from tractor yoke to implement connection. The guard is manufactured from impact-resistant polypropylene and is designed to remain stationary while the shaft rotates, using anchor chains attached to fixed points on the tractor and implement. The guard system meets CE machinery directive requirements and is compliant with international agricultural machine safety standards (ISO 11684). Always attach both anchor chains before engaging the PTO.

Q: Can CMN Transmission supply a custom PTO shaft if my application has non-standard dimensions?
A: Yes. CMN Transmission offers custom PTO shaft manufacturing for non-standard PTO shaft dimensions, unusual PTO shaft sizes, or applications requiring a PTO shaft adapter to connect mismatched spline specifications. Provide us with the required compressed and extended lengths, both end spline specifications, the operating angle, and the target torque rating, and our engineering team will produce a dimensional drawing for approval before manufacture. Custom and OEM orders are a core part of our business and are supported by our full factory processing equipment.

Q: Why is a double CV joint necessary on the New Idea 5512, rather than a standard cross-shaft design?
A: The New Idea 5512 Discbine's three-point hitch geometry and the required clearance for disc mower head movement create a large angular offset between the tractor PTO stub and the implement input during normal working and headland turn conditions. A standard cardan PTO shaft universal joint design produces velocity fluctuation proportional to the operating angle at the angles required by the 5512, this fluctuation would generate unacceptable vibration in the disc head, accelerate gearbox and bearing wear, and reduce cut quality. The double CV design eliminates this entirely, which is why New Idea specified the Weasler 55N double CV as original equipment and why a correctly-rated double CV is the only appropriate replacement.

Q: Is this PTO shaft suitable for both 540 and 1000 rpm PTO tractors?
A: The 55N CAT 6 double CV disc mower PTO shaft is available in configurations for both 540 PTO shaft and 1000 rpm PTO shaft applications. The standard tractor-end yoke described in this listing uses the 1-3/8"-21 spline connection, which is the standard for 540 rpm PTO tractors. For 1000 rpm PTO tractors using a 1-3/8"-6 or 1-3/4"-20 spline stub, a different yoke specification is required. Confirm your tractor's PTO speed and spline type before ordering, or contact our technical team with your tractor make and model for a definitive recommendation.

Q: How does a slip clutch PTO shaft differ from a shear bolt PTO shaft, and which is better for disc mower use?
A: A slip clutch PTO shaft uses friction discs pre-loaded to a specific torque limit; when peak torque is exceeded, the clutch slips momentarily and then automatically re-engages no hardware replacement is required. A shear bolt PTO shaft uses a calibrated bolt that fractures at a specific torque; after a blade strike, the broken PTO shaft shear bolt must be replaced before work can resume. For disc mower applications in stony or trash-heavy fields where blade strikes are frequent, a slip clutch PTO shaft saves significant time and eliminates the need to carry replacement bolts. For cleaner conditions, a shear pin PTO shaft provides adequate protection at lower cost and complexity.

Recensioni dei clienti

James Holloway, Farm Operator, United States
"Been running a New Idea 5512 on our 200-acre alfalfa operation for going on seven years now. The original Weasler shaft finally gave up at the start of second cut this past June, one of the U-joint cups fractured clean. Ordered the 55N 80x50 double CV from CMN Transmission on a Tuesday and had it in hand by Friday. Slid straight onto the 1-3/8-21 stub with no fuss at all, and the implement end went onto the 23-spline input like it was made for it, which I suppose it basically was. Cut nearly 300 acres since then and the shaft is running smooth and quiet. Good quality build on the guard too not that cheap thin stuff you sometimes see. Definitely ordering from CMN again when I need PTO shaft parts."

Klaus Richter, Parts Manager, Germany
"We are a farm equipment dealer based in Lower Saxony and we have been sourcing replacement PTO drive shafts from CMN Transmission for about two seasons now. The quality is consistent, the dimensional tolerances are correct, and we have not had a single warranty claim from our customers on these disc mower PTO shaft units. The CE certification documentation was provided without any problems, which is important for our European sales compliance. Shipping to Germany is usually reliable, with 8 to 12 business days from order placement. Price point is significantly better than sourcing from the OEM parts channel, which allows us to offer competitive retail pricing while maintaining healthy margins. Will continue placing orders."

Patrick Moreau, Dairy Farmer, France
"I was a bit unsure about ordering a PTO shaft for New Idea disc mower equipment from an online supplier for the first time, but the CMN technical team was very helpful. I sent them the model number of my 5512 and described the original shaft and they confirmed straight away that the 55N double CV unit was the correct replacement. The shaft arrived well-packaged and all the CV joints moved smoothly out of the box. Installation took about 20 minutes. Only thing I would say is that the fitting instructions inside the box were basic a QR code link to a more detailed video installation guide would be a nice addition. But the shaft itself is performing well, now 6 weeks into the hay season. Four stars, would be five with better documentation."

Brett Sanderson, Mixed Farm, Australia
"Ordered the implement-side CV half only the 55N 50-degree CV half on the discbine end since my tractor-side CV was still good. The 1.5 inch 23-spline yoke fit the New Idea input shaft perfectly, no play whatsoever. I was honestly a bit surprised at the build quality for the price; the yoke forging looks heavy and the bearing cross kit feels tight and smooth, not loose and gritty like some of the cheap aftermarket stuff I have tried in the past. This is the second component I have bought from CMN Transmission. First was a gearbox. Both have been good experiences. Shipping to Australia took about 10 days, which is about as fast as you can expect."

Alejandro Vásquez, Farm Equipment Dealer, Argentina
“We purchased the complete power take-off shaft for our New Idea 5512 mower the version with the double 80x50 CV joints. The fit was perfect from the very first moment, without the need for any adapters. We have now used this PTO shaft for three mowing seasons and it has not presented any problems. The price was approximately half of the quote provided by the official distributor, and the quality is comparable. Customer service responded to our technical questions by email quickly and precisely. Highly recommended for any agricultural machinery operator in South America who needs quality replacement parts at a reasonable price.”

Graeme Tūhoe, Contracting Operator, New Zealand
"I manage a contracting business doing about 4,000 acres of hay a year across the North Island. We run two 5512 Discbines and go through a PTO shaft every couple of seasons on each machine. The terrain here is hilly enough that the shafts really work for their living. Started using CMN Transmission about three years ago and have purchased four shafts from them since. Not a single early failure. The guard tubes are a better fit than some of the other aftermarket brands we tried before. Logistics to New Zealand are what they are, but CMN uses reliable freight forwarders and gives good tracking. Happy to keep recommending them to other contractors."

Ricardo Almeida, Parts Distributor, Brazil
"We supply farm equipment parts to dealers across southern Brazil and have been evaluating CMN Transmission as a supplier for the past two years. The PTO shaft for disc mower range is strong good selection, consistent quality, competitive FOB pricing, and the ISO and CE certifications are in order, which matters for our import documentation. Lead times from Korea are predictable, typically 15 to 20 days to port. The CMN sales team is responsive and willing to discuss volume pricing, which is important for our distribution model. We have placed four container orders so far and plan to expand our range with them. A reliable and professional supplier."

Marco Ferretti, Agricultural Cooperative Manager, Italy
"Our cooperative operates seven disc mowers of various makes across about 1,800 hectares of grassland in the Po Valley. We replaced the PTO shaft on our New Idea 5512 using the CMN complete 55N 80x50 double CV assembly last spring. Fit and function are identical to the Weasler original. We always verify spline specifications before ordering, and the CMN product data sheet clearly listed the 1-3/8-21 and 1.5 x 23 spline details, so we had full confidence before placing the order. The shaft has now completed one full hay season, three cuts on approximately 300 hectares without any issues. Good value for money and good technical support from the CMN team during the pre-purchase phase."

Pieter Merwe, Hay Farmer, South Africa
"I run a small but busy hay operation in the Western Cape, and getting parts for older New Idea machines in South Africa is genuinely difficult. The local dealer network for New Idea is thin. Found CMN Transmission through an online search for PTO shaft for New Idea discbine and sent an inquiry. The response came back the same day with a confirmed part match and a proforma invoice. Shaft arrived in 14 days, which honestly beat my expectations for a shipment from Korea. Quality is solid, the guard clips fitted properly and the CV joints are smooth with no rough spots. This company clearly knows its product. Will definitely use again and recommend to other operators in the region."