Albero cardanico del trattore<\/strong><\/a> Si tratta di una trasmissione a velocit\u00e0 costante CAT 6 che collega il perno della presa di forza del trattore all'ingresso primario del riduttore del timone dell'erpice a dischi. Il design del giunto omocinetico all'interno di questo albero \u00e8 fondamentale per il campo di funzionamento dell'erpice a dischi. A differenza di un giunto cardanico convenzionale, che produce una fluttuazione di velocit\u00e0 intrinseca due volte per giro quando azionato ad un angolo, il giunto omocinetico mantiene una velocit\u00e0 angolare perfettamente uniforme durante l'intera rotazione, indipendentemente dall'angolo di deflessione tra ingresso e uscita. Ci\u00f2 elimina i carichi di coppia pulsanti, le vibrazioni e il rumore che un albero standard creerebbe quando l'erpice a dischi viene ruotato lateralmente durante il funzionamento a trazione laterale o a perno centrale.<\/p>\nAfter the main PTO drive shaft delivers power to the tongue gearbox, the gearbox splits and redirects the rotational force toward the cutterbar drive train. On swivel-hitch models such as the H7230, H7330, H7460, and H7560, a dedicated swivel gearbox is integrated into the tongue assembly to maintain the PTO shaft angle straight through turns of more than 90 degrees. This gearbox is critical because it allows the operator to execute extremely tight headland turns and cut around field obstacles without ever needing to stop and realign the machine. Power exits the tongue gearbox via an intermediate PTO driveline shaft and enters the main cutterbar drive gearbox on the frame of the implement.<\/p>\n
For the H7230, H7330, H7460, and H7560 models, one or more intermediate PTO shaft assemblies bridge the tongue gearbox to the cutterbar gearbox, often including a 55N square-profile shaft with an integrated clutch for the larger 100 HP models. The secondary disc mower PTO shaft then distributes power laterally through the MowMax cutterbar system, driving the series of individual sealed disc gearboxes mounted along the cutterbar frame. Each disc gearbox multiplies the input shaft RPM to drive the cutting discs at approximately 3,000 RPM, generating the high blade tip speed necessary for a clean, high-quality cut through dense forage crops. For the secondary shaft position on most Discbine models, CMN Transmission recommends a Category 5 Double CV configuration with the FNT34 combination clutch, ensuring smooth power delivery to the cutterbar and reliable overload protection for the gearbox chain.<\/p>\n
Il gruppo frizione FNT34 sull'albero cardanico della frizione di slittamento secondaria svolge simultaneamente due funzioni di protezione distinte ma complementari. L'elemento a disco d'attrito fornisce una soglia di slittamento di coppia calibrata: quando la barra falciante incontra un improvviso blocco, un impatto con una roccia o un corpo estraneo che produce un picco di coppia superiore al limite impostato sulla frizione, le pastiglie d'attrito slittano istantaneamente per assorbire l'energia d'urto prima che possa propagarsi attraverso il giunto cardanico, la forcella e i componenti interni del riduttore dell'albero cardanico. Questo \u00e8 il meccanismo che salva i componenti pi\u00f9 costosi da guasti catastrofici.<\/p>\n
![\"Albero](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-New-Holland-Disc-Mower-24.webp\")
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Applications of Disc Mower PTO Shaft<\/h2>\n
1. Raccolta del fieno<\/strong>
\nThe primary application for the New Holland Discbine series. The disc mower cuts grasses and legumes into windrows while the integrated conditioning rolls crimp and crack the stems to accelerate field drying before baling. A reliable PTO shaft for discbine is the critical link that transfers tractor power to the cutterbar at the consistent RPM required for a clean, high-quality cut across varied crop densities and field conditions. Any interruption in PTO shaft performance during the narrow harvest weather window directly reduces hay quality and profitability.<\/p>\n2. Raccolta del foraggio<\/strong>
\nMowing high-value crops such as alfalfa, clover, and ryegrass at the right stage of maturity requires the cutterbar to run at precise, consistent speed throughout the entire swath. The 1000 PTO shaft configuration used on the larger Discbine models delivers the RPM stability needed to maximize nutritional content and minimize leaf loss at the point of cutting, whether the crop is destined for dry hay storage or green chop for direct feeding. An accurately calibrated slip clutch on the PTO drive shafts assembly protects the gearbox investment without compromising cut quality.<\/p>\n3. Produzione di insilato<\/strong>
\nCutting crops at higher moisture levels for fermented silage storage in bunkers, pits, or wrapped bales demands fast, even cutting across the full width of the machine to ensure uniform fermentation. The 540 PTO shaft and 1000 rpm PTO shaft options across the Discbine range allow operators to match PTO speed to tractor output and silage crop type. Reliable PTO shaft parts are especially critical in silage operations because any shaft failure mid-cut results in uneven moisture in the wilted crop, which compromises fermentation quality and silage dry matter losses.<\/p>\n4. Gestione dei pascoli<\/strong>
\nTopping and trimming pastures to control rank or stemmy growth, remove weeds, and encourage fresh and palatable re-growth for grazing animals places heavy intermittent demands on the discbine drivetrain. The combination of dense root crowns, embedded wire, stones, and sudden terrain changes makes the overrunning clutch function of the FNT34 shear bolt PTO shaft alternative especially valuable in pasture environments. A robust PTO shaft tractor interface with proper CV joint articulation ensures the machine tracks ground contours without generating destructive torque spikes during the frequent direction changes typical of irregular paddock shapes.<\/p>\n5. Terminazione della coltura di copertura<\/strong>
\nCutting down winter cover crops such as cereal rye or vetch ahead of the planting season, leaving the biomass as a protective mulch layer to suppress weeds and protect soil structure. Cover crop termination often involves mowing at high forward speeds through dense, lodged crop stands that test the torque capacity of every component in the PTO driveline shaft system. Choosing the correct PTO shaft sizes and category rating for the tractor HP being used avoids overloading the drivetrain and ensures that the cut biomass is distributed uniformly across the full cutting width for effective mulch coverage.<\/p>\n6. Roadside & Specialty Mowing<\/strong>
\nMaintaining roadsides, drainage ditches, airport buffer strips, and conservation headlands where a clean, controlled cut is needed in irregular or sensitive areas. In these applications, the center-pivot and swivel-hitch Discbine models depend entirely on the CAT 6 CV tractor PTO shafts to maintain smooth power delivery through the extreme articulation angles needed to position the cutterbar precisely along sloped banks, ditches, and corners. The PTO shaft guard and enclosed drivetrain design are also especially important in public roadside work where bystander safety standards apply.<\/p>\n![\"Albero](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-New-Holland-Disc-Mower-21.webp\")
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How to Install PTO Shaft on New Holland Discbine<\/h2>\n
1. Safety Preparation: Disengage PTO and Chock Wheels
\nBefore beginning any PTO shaft installation or removal procedure, shut off the tractor engine completely and allow all rotating components to come to a full stop. Apply the tractor parking brake firmly and chock the rear wheels to prevent any movement. Disconnect the spark plug lead on older tractors or turn the key fully to the off position on modern models. Never attempt to install or remove a PTO driveline shaft while any components are still turning, even at very low speed. Confirm that no residual hydraulic pressure remains in the discbine lift circuit that could cause the header to drop unexpectedly during the procedure.<\/p>\n
2. Measure and Confirm PTO Shaft Length Before Fitting
\nBefore sliding the new PTO shaft tube onto the tractor and implement stubs, measure the distance between the two yoke connection points with the discbine hitched to the tractor at normal operating height. The shaft should overlap by at least 1\/3 of its telescoping travel when fully compressed, and the two yoke halves should not contact each other or hit the shaft tube ends when the machine is at full articulation angle. A PTO shaft length that is too short risks disengaging the telescoping tubes under extreme articulation, while an excessively long shaft risks bottoming out and bending or cracking the PTO shaft tubing when the machine moves over ground undulations.<\/p>\n
3. Slide and Lock the Tractor-Side Yoke onto the PTO Stub
\nAlign the PTO shaft yoke spline with the tractor PTO output stub, ensuring that the correct spline profile is matched (1.375-21 or 1.750-20 as applicable to your Discbine model). Push the yoke firmly onto the stub until the spring-loaded locking collar clicks into the groove and the yoke is fully seated with no axial play. Tug the yoke firmly to confirm it is locked. Never start the tractor with an unlocked yoke. On models where a PTO shaft adapter is used to bridge a difference between tractor and implement spline sizes, confirm the adapter is correctly torqued to specification before fitting the main driveline shaft.<\/p>\n
4. Connect the Implement-Side Yoke to the Discbine Input
\nConnect the implement-side yoke to the discbine tongue gearbox input shaft using the same locking collar procedure used on the tractor side. On Discbine models using a combination clutch, ensure the clutch body faces the correct direction as marked on the FNT34 housing (the overrunning clutch must be oriented toward the implement side, not the tractor side). Check that the PTO shaft cover chain anchor points are correctly attached to both the tractor drawbar bracket and the implement frame to prevent the guard tube from rotating with the shaft. A loose or unanchored PTO shaft guard is a serious safety hazard and may cause the guard to wrap around the shaft during operation.<\/p>\n
5. Lubrication, Trial Run, and Final Checks
\nApply lithium-complex grease to all PTO shaft u joint cross-kit grease nipples until fresh grease appears at the needle roller bearing seals on all four trunnion ends. Also grease the telescoping inner and outer shaft profile tubes to prevent fretting corrosion and ensure smooth length adjustment under load. Start the tractor and engage the PTO at low throttle first, listening and observing for any unusual vibration, noise, or misalignment before bringing the machine up to full working RPM. After the first hour of operation, re-torque any visible bolt connections on the clutch and yoke assemblies, and re-check the guard chain anchor points for security. This initial inspection interval is standard practice after fitting any new agricultural PTO shaft assembly.<\/p>\n
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How to Choose the Right PTO Shaft for Disc Mower<\/h2>\n
1. Confirm Your Exact Discbine Model Number<\/strong>
\nThe model number (H7220, H7230, H7320, H7330, H7450, H7460, H7550, or H7560) determines not only the PTO shaft category and PTO shaft dimensions required, but also whether your machine uses one, two, or three shaft positions in the drivetrain. The shaft requirements for a 65 HP H7220 are fundamentally different from those of a 100 HP H7460, and ordering the wrong category will result in a shaft that either does not physically fit or is under-rated for the torque load it must transmit. Always locate the model plate on the tongue frame before placing an order, and note the production year if possible for variant identification.<\/p>\n2. Identify Your Tractor PTO Speed: 540 or 1000 RPM<\/strong>
\nThe H7220 and H7320 are 540 RPM only, requiring a standard 540 PTO shaft configuration. The H7450, H7460, H7550, and H7560 require a 1000 PTO shaft. The H7230 and H7330 can run on either 540 or 1000 RPM, so the shaft must be selected to match the tractor PTO output speed in actual field use. Running a discbine on the wrong PTO speed will either dramatically overspeed the cutterbar discs (creating a dangerous blade failure risk at 1000 RPM on a 540-designed machine) or underspeed them (producing a poor quality cut with excessive crop plugging). Verify the tractor PTO speed selector position before finalizing the shaft specification.<\/p>\n3. Verify Tractor Spline Size and Hitch Height<\/strong>
\nThe CAT 6 CV main shaft is available with either a 1.375-21 spline (6-spline, common on 65-80 HP tractors) or a 1.750-20 spline (21-spline, used on 90-100+ HP tractors). Measure the PTO stub diameter precisely if you are unsure, or refer to the tractor operator manual for the specified PTO output shaft profile. Additionally, the distance between the tractor drawbar pin and the tractor PTO centerline affects the effective shaft angle at working height. If this distance is non-standard due to a modified hitch bracket or an unusual tractor-implement combination, our engineering team can calculate the correct PTO shaft length and provide a custom configuration to suit the exact geometry.<\/p>\n4. Choose Clutch Type Based on Operating Conditions<\/strong>
\nFor most Discbine applications, the FNT34 combination clutch on the secondary slip clutch PTO shaft position is the preferred choice, offering both friction slip protection and overrunning capability in one compact assembly. However, in some very rocky or obstructed fields where extreme impact loads are frequent, a shear bolt PTO shaft or PTO shaft shear bolt design may be preferred because the shear bolt provides an absolutely definite, positive torque limit and is quickly replaceable in the field with a standard hardware item. Our CMN Transmission technical team can advise on the appropriate clutch selection for your specific field conditions, crop type, and typical obstacle frequency to ensure the right level of drivetrain protection is specified from the start.<\/p>\n![\"Albero](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-New-Holland-Disc-Mower-20.webp\")
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Common PTO Driveline Shaft Troubleshooting<\/h2>\n
1. Vibrazioni eccessive durante il funzionamento
\nVibration in the PTO drive shaft during mowing is most commonly caused by worn or damaged PTO shaft universal joint cross-kits, a bent or kinked PTO shaft tube, misaligned yoke phasing (the two yokes must be in the same plane, not 90 degrees offset), or a shaft running at an excessive operating angle for its category rating. Inspect the cross-kit needle rollers for wear or seizure by checking for any play or rough rotation at each trunnion journal. Replace the cross-kit assembly immediately if any roughness or looseness is felt, as a failed U-joint can disintegrate under load and cause significant secondary damage to the machine and a serious safety hazard for the operator.<\/p>\n
2. Clutch Slipping Under Normal Load
\nSe la frizione FNT34 sull'albero della presa di forza slitta durante il normale funzionamento sul campo senza alcun apparente sovraccarico, le cause pi\u00f9 probabili sono l'usura delle guarnizioni del disco di attrito, la contaminazione delle superfici di attrito con grasso o olio, oppure un precarico della molla errato dopo un precedente intervento di manutenzione. Non tentare di aumentare il precarico della molla della frizione oltre le specifiche del produttore come soluzione temporanea, poich\u00e9 ci\u00f2 annullerebbe la funzione di protezione dal sovraccarico e rischierebbe di danneggiare il cambio al successivo impatto con una roccia. Invece, smontare la frizione, ispezionare le condizioni del disco di attrito, pulire accuratamente tutte le superfici di accoppiamento, sostituire eventuali componenti usurati e reimpostare il precarico della molla al valore di coppia specificato prima di rimettere in servizio i componenti dell'albero della presa di forza.<\/p>\n
3. Telescoping Tube Seizing or Difficult to Extend
\nIf the inner and outer PTO shaft tubing profiles are binding or seizing when the machine is hitched at an angle, the root cause is almost always lack of lubrication on the sliding profile surfaces, combined with the abrasive fretting wear that accumulates when the tubes are operated dry for extended periods. Clean the inner and outer profile sections with a clean rag, apply a generous coat of lithium-based grease, and cycle the shaft through its full extension range several times to distribute the grease evenly. For severely corroded profiles, a light application of penetrating oil followed by careful clean-up and fresh grease may be needed. Regularly greasing the PTO shaft tube sliding interface at the same service interval as the cross-kits prevents this issue from recurring.<\/p>\n
4. Noisy Operation or Clicking from PTO Shaft Area
\nClicking, knocking, or rhythmic noise from the tractor PTO shaft area during operation typically indicates a failing cross-kit needle roller bearing, loose or damaged PTO shaft yoke locking collar, or a worn overrunning ratchet mechanism inside the FNT34 combination clutch. Locate the source of the noise carefully by running the discbine at low speed on flat ground with the cutterbar raised, observing the shaft from a safe distance while listening for the click cycle frequency. A click that repeats at shaft rotation frequency (once per revolution) usually indicates a cross-kit problem, while a click that occurs irregularly often points to the overrunning clutch ratchet engagement. Address the noise source promptly as continued operation with a damaged component accelerates wear dramatically and increases the risk of sudden shaft failure.<\/p>\n
5. PTO Shaft Guard Damage or Breakage
\nA cracked, missing, or non-rotating PTO shaft cover is both a safety compliance failure and a maintenance indicator. The guard should rotate freely on its bearing relative to the inner shaft, and the chain anchor must be securely attached at both ends. A guard that has seized onto the shaft and is rotating with it generates significant friction heat and will wear through the plastic rapidly. Always replace a damaged PTO shaft guard immediately and never operate the discbine with an exposed rotating shaft, as the entanglement risk to operators is severe. Our replacement guard kits are designed to match the exact diameter and length of our CMN agricultural PTO shaft assemblies and include all anchor chains, end caps, and fitting hardware.<\/p>\n
![\"Albero](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-New-Holland-Disc-Mower-28.webp\")
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Albero cardanico e riduttore della falciatrice a dischi<\/h2>\n
The disc mower PTO shaft is the primary mechanical link between the tractor and the entire disc mower drivetrain. It is responsible for transferring engine torque from the spinning PTO output stub, through the working length of the hitch connection, and into the input gearbox of the disc mower or discbine implement. On the New Holland Discbine series, this shaft must accommodate the unique geometric demands of a machine that can pivot, swivel, and articulate at steep angles during operation and field headland turns, which is why the CAT 6 Constant Velocity design is specified for the main shaft position. The PTO drive shaft for discbine also incorporates safety protection in the form of the FNT34 combination clutch, which shields both the tractor and implement drivetrain from shock loads and overrunning inertia forces. Without a properly functioning tractor PTO drive shaft, no power reaches any part of the disc mower cutting or conditioning system, making it the single most critical mechanical component in the entire implement powertrain from the perspective of operational availability.<\/p>\n
CMN Transmission manufactures and supplies the complete PTO shaft for disc mower range to match every configuration in the Discbine lineup, from the compact 540 RPM side-pull models to the high-output 1000 RPM center-pivot wide-cut machines. Each shaft assembly is designed and tested to deliver the rated HP and torque capacity of the implement without vibration, noise, or premature wear throughout its full service life.<\/p>\n
The disc mower gearbox, also known as the cutterbar gearbox or disc drive gearbox, is the power distribution hub that receives the input torque from the PTO shaft driveline and converts it into the high-speed rotational output needed to drive the individual cutting discs. On the New Holland Discbine MowMax cutterbar system, each cutting disc is driven through its own individually sealed gearbox module with a dedicated oil reservoir, which means there is a series of gearboxes linked in sequence along the cutterbar. Each gearbox module multiplies the input shaft speed from the 540 or 1000 RPM PTO input up to the cutterbar disc operating speed of approximately 3,000 RPM, which is the speed required for clean, high-velocity blade-tip cutting through dense forage crops. The cutterbar gearboxes are connected in series by short lateral shaft segments, creating a continuous mechanical power chain from the primary input at one end of the cutterbar to the final disc gearbox at the opposite end.<\/p>\n
The essential interdependence between the PTO driveline shaft for disc mower and the disc mower gearbox is direct and absolute: the gearbox cannot function without the PTO shaft delivering input power, and the PTO shaft serves no purpose if the gearbox fails to receive and distribute that power correctly. In practice, the two components must be correctly matched in torque capacity and rotational speed to ensure that neither is overloaded relative to the other. When replacing either component, it is best practice to inspect both simultaneously: a worn or failed gearbox is often the root cause of abnormal torque spikes that have already accelerated PTO shaft wear, and vice versa.<\/p>\n
![\"Riduttore](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/0_Disc-Mower-Gearbox-1.webp\")
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Perch\u00e9 scegliere gli alberi cardanici agricoli di CMN Transmission?<\/h2>\n
CMN Transmission (Korea) \u00e8 uno dei principali fornitori mondiali di soluzioni per la trasmissione di potenza in ambito industriale e agricolo, con una gamma di prodotti che comprende alberi di trasmissione PTO, riduttori agricoli, cilindri idraulici, riduttori epicicloidali, riduttori a vite senza fine, ingranaggi conici, pignoni a catena, catene, cremagliere, pulegge, boccole coniche, giunti e molto altro. Con sede centrale ad Ansan-si, Gyeonggi-do, Corea, e una base produttiva e oltre 10 stabilimenti in cooperativa, manteniamo un inventario di oltre 150.000 prodotti standard a magazzino e serviamo clienti in oltre 53 paesi tra Nord America, Europa, Sud America, Medio Oriente, Africa, Sud-est asiatico e Oceania.<\/p>\n
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 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.<\/p>\n
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 dimensions, and clutch specifications for your exact tractor and implement combination. We offer custom PTO shaft manufacturing for non-standard applications and provide detailed dimensional drawings upon request. Our PTO shaft parts catalog covers the full range from compact 540 PTO shaft configurations to high-output 1000 rpm PTO shaft assemblies, with shear pin PTO shaft, slip clutch PTO shaft, and combination clutch variants all available from stock.<\/p>\n
After the sale, our 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. Contact us today for pricing, technical specifications, and delivery information on the PTO shaft for New Holland Discbine models that match your operation.<\/p>\n
![\"Attrezzatura](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/03\/Factory-Equipment-3.webp\")
![\"Attrezzatura](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/03\/Factory-Equipment-1.webp\")
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Domande frequenti<\/h2>\n
Q: What PTO shaft configuration does the New Holland Discbine H7450 require?<\/strong>
\nA: The H7450 is a 1000 RPM center-pivot model requiring 90 PTO horsepower. It uses a 55N Double 80\/50 CV primary main shaft for standard configurations, or a 55N standard shaft when used with the optional swivel hitch tongue. The secondary shaft position uses a 55N standard configuration. There is no intermediate shaft on the H7450. The implement input shaft is typically a 1.375-21 spline. When ordering, confirm whether your machine has the standard drawbar hitch or the optional swivel hitch, as this determines the primary shaft specification. Our technical team can confirm the exact part numbers based on your serial number if needed.<\/p>\nQ: What is the difference between a 540 PTO shaft and a 1000 RPM PTO shaft for disc mowers?<\/strong>
\nA: A 540 PTO shaft is designed for tractors with a 540 RPM PTO output, typically used with implements requiring up to around 65-80 PTO horsepower, such as the H7220, H7230, H7320, and H7330 Discbine models. A 1000 PTO shaft operates at 1000 RPM and handles higher power densities in the same shaft diameter, making it the standard for high-output implements requiring 90-100 HP or more, as used on the H7450 through H7560 series. The spline count and shaft profile differ between 540 and 1000 RPM specifications, so these shafts are not interchangeable. Running a 540-designed shaft at 1000 RPM will cause catastrophic failure due to excessive centrifugal forces on the cross-kits and tubing. Always match the shaft specification to the tractor PTO speed setting in actual use.<\/p>\nQ: Can I use a CMN Transmission shaft as a direct replacement for Weasler PTO shaft on my Discbine?<\/strong>
\nR: S\u00ec. CMN Transmission produce il nostro albero cardanico per erpice a dischi New Holland come equivalente dimensionale diretto degli alberi OEM Weasler originariamente installati sui modelli di erpice a dischi della serie H. Tutti i profili delle scanalature del giunto, i diametri del foro, le dimensioni della sede del kit trasversale e le lunghezze del tubo telescopico sono realizzati con le stesse dimensioni di riferimento degli alberi di trasmissione originali Weasler. Ci\u00f2 significa che i nostri alberi si avvitano direttamente ai supporti della staffa e alle interfacce del collare di bloccaggio esistenti sulla vostra macchina senza bisogno di adattamenti o modifiche. Lo stesso principio di montaggio diretto si applica anche agli alberi originali Bondioli e Pavesi. In caso di dubbi sulle specifiche corrette per l'anno di produzione della vostra macchina, contattate il nostro team tecnico fornendo il numero di serie per conferma prima di effettuare l'ordine.<\/p>\nQ: What is an FNT34 combination clutch and why is it important on the discbine PTO shaft?<\/strong>
\nA: The FNT34 is a specific type of combination clutch that integrates both a friction disc clutch and an overrunning (freewheeling) ratchet clutch in a single compact housing, mounted on the secondary PTO drive shaft for discbine. The friction element limits the peak torque that can be transmitted through the shaft to a calibrated maximum, protecting the cutterbar gearboxes and U-joints from sudden overload impacts caused by rock strikes or foreign object hits. The overrunning element prevents the high rotational inertia stored in the spinning disc cutterbar from back-driving the tractor transmission when the PTO is disengaged or the engine is suddenly unloaded. Both protection mechanisms are critical for reliable, cost-effective operation of the New Holland Discbine, and the FNT34 assembly should be inspected and serviced at the intervals specified in the implement operator manual to maintain correct slip torque calibration.<\/p>\nQ: What spline size does the New Holland Discbine tractor-side PTO stub use?<\/strong>
\nA: The New Holland Discbine range accommodates two common tractor PTO spline sizes: the 1.375-inch diameter 21-spline (also written as 1-3\/8 inch x 21 spline or 1.375-21), which is standard on most tractors in the 65-80 HP class used with H7220, H7230, H7320, and H7330 models; and the 1.750-inch diameter 20-spline (also written as 1-3\/4 inch x 20 spline or 1.750-20), which is used on larger tractors in the 90-100 HP class running the H7450 through H7560. The implement input shaft is most commonly a 1.375-21 spline across all models. If your tractor has an unusual PTO shaft adapter requirement between these standard sizes, CMN Transmission can supply the appropriate adapter coupling as part of the shaft assembly order.<\/p>\nQ: What is a CAT 6 Constant Velocity PTO shaft and why does the Discbine need it?<\/strong>
\nA: Category 6 (CAT 6) refers to the torque and size class of the heavy duty PTO shaft, capable of transmitting up to approximately 3,000 Nm of torque in the primary shaft position. The Constant Velocity (CV) joint design within this shaft uses a double-joint assembly that maintains identical input and output angular velocity regardless of the deflection angle, which is fundamentally different from standard single Cardan joint designs that produce cyclical speed variation at any working angle. The Discbine requires CV technology on the main shaft because the center-pivot and swivel-hitch tongue designs allowthe machine to articulate far beyond the operating angle range of a standard single Cardan shaft. Without a CV joint, running a discbine at extreme tongue angles would generate severe vibration, rapid U-joint wear, and unacceptable noise levels at both 540 and 1000 RPM operating speeds.<\/p>\nQ: How do I know when my disc mower PTO shaft needs to be replaced?<\/strong>
\nA: The key signs that your PTO shaft for disc mower requires replacement or major service include: noticeable vibration or shaking in the machine at normal operating RPM; clicking, knocking, or grinding noise from the shaft area; visible radial play or roughness in the PTO shaft u joint cross-kit when rotated by hand; visible cracking, bending, or denting in the PTO shaft tubing; a slip clutch that no longer holds under normal cutting load (indicating worn friction disc linings); difficulty telescoping the inner and outer shaft profiles; or a seized, cracked, or non-rotating PTO shaft guard. Annual inspection at the start of the cutting season and after any known impact events is recommended. Replacing worn components proactively during the off-season is far less costly than an emergency breakdown mid-harvest.<\/p>\nQ: Can CMN Transmission manufacture custom PTO shaft lengths for non-standard installations?<\/strong>
\nA: Yes. CMN Transmission offers a full custom PTO shaft manufacturing service for applications where standard catalog lengths do not fit the tractor-implement geometry, for modified machines with altered hitch heights, or for non-standard implement input shaft configurations. To order a custom shaft, provide us with the extended length, compressed length, tractor-side spline specification, implement-side yoke interface dimensions, maximum operating angle, required torque rating, and clutch type preference. Our engineering team will calculate the correct telescoping profile overlap, tube diameter, and wall thickness for the application and provide a dimensional drawing for approval before production. Custom PTO shaft dimensions are typically available within 10-15 business days from drawing approval, and we accept custom OEM orders for agricultural equipment manufacturers requiring private-label driveline solutions as well.<\/p>\nQ: What is the difference between Category 5 and Category 6 PTO shaft categories?<\/strong>
\nA: PTO shaft sizes are classified into categories based on torque capacity and outer tube diameter. Category 5 (CAT 5) shafts are rated for approximately 1,800 Nm of continuous torque and use a specific cross-kit and tube profile sized for mid-range power applications, making them appropriate for the secondary and intermediate shaft positions on the Discbine. Category 6 (CAT 6) shafts are larger and rated for approximately 3,000 Nm of continuous torque with a correspondingly larger tube outer diameter and cross-kit size, making them appropriate for the main primary shaft position that must handle the full tractor PTO output in high-HP applications. Using a CAT 5 shaft in a position that requires a CAT 6 will result in shaft failure under normal operating loads. CMN Transmission clearly identifies the correct category for each shaft position in our Discbine-specific product listings.<\/p>\nQ: Does the PTO shaft guard meet CE safety standards and what maintenance does it require?<\/strong>
\nA: Yes. The complete PTO shaft cover supplied with CMN Transmission Discbine drivelines is designed and tested to comply with CE Machinery Directive requirements for rotating shaft guards, including minimum coverage length, radial clearance from the rotating shaft, end cap design, and chain anchor point strength. The guard tube should be inspected visually at each grease service interval for cracks, splits, or brittleness in the plastic, which can develop with age and UV exposure. Confirm that the guard rotates freely on its bearing relative to the shaft (it must not turn with the shaft) and that both anchor chains remain correctly attached. A worn bearing inside the guard end cap that allows the guard to rotate with the shaft must be replaced promptly, as the resulting friction will quickly destroy the guard and expose the rotating driveline.<\/p>\n![\"Albero](\"https:\/\/korea-transmission.com\/wp-content\/uploads\/2026\/04\/PTO-Shaft-for-New-Holland-Disc-Mower-22.webp\")
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Recensioni dei clienti<\/h2>\n
Marcus Hollingsworth, responsabile dell'azienda agricola, Stati Uniti<\/strong>
\n\"Utilizziamo un H7450 nella nostra azienda agricola di erba medica di 180 acri in Ohio da quasi sette anni. L'albero principale originale Weasler si \u00e8 finalmente usurato a livello del giunto omocinetico dopo quattro stagioni di taglio complete. Ho ordinato il ricambio CAT 6 da CMN Transmission marted\u00ec e l'ho ricevuto a casa gioved\u00ec. L'accoppiamento era perfetto, la scanalatura 1.750-20 si \u00e8 inserita senza problemi e si \u00e8 bloccata correttamente. Abbiamo gi\u00e0 accumulato oltre 200 ore di lavoro con il nuovo albero in tre tagli e non abbiamo avuto alcun problema. La qualit\u00e0 della protezione \u00e8 anche nettamente migliore rispetto all'originale, onestamente. Ordinerei di nuovo da CMN senza nemmeno cercare altrove.\"<\/p>\nKlaus Bergmann, Farmer, Germany<\/strong>
\n\u201cNella nostra azienda agricola in Baviera utilizziamo una mietitrebbia H7560 e avevamo urgente bisogno di un albero di trasmissione di ricambio nel pieno della stagione del raccolto. CMN Transmission aveva a disposizione il set completo di alberi: albero principale, albero intermedio 55N con frizione e albero secondario. La consegna in Germania \u00e8 avvenuta in soli quattro giorni lavorativi. La frizione combinata FNT34 \u00e8 realizzata con assoluta precisione e il limite di coppia \u00e8 impostato in modo molto uniforme. Per la nostra applicazione da 100 CV a 1000 giri\/min, \u00e8 esattamente ci\u00f2 di cui abbiamo bisogno. Il rapporto qualit\u00e0-prezzo \u00e8 nettamente superiore all'alternativa OEM offerta dal concessionario.\u201d<\/p>\nThomas Whitaker, Agricultural Contractor, Australia
\n<\/strong> \"Gestisco un'impresa di contoterzismo a Victoria, in Australia, con due macchine H7460 che lavorano per diversi clienti nel settore lattiero-caseario. Quando si programmano tagli consecutivi in \u200b\u200bdiverse propriet\u00e0, non ci si pu\u00f2 permettere tempi di fermo macchina. Da tre anni, CMN Transmission \u00e8 il mio fornitore di fiducia per i componenti dell'albero cardanico. Gli alberi secondari standard da 55N che ho ordinato la scorsa stagione sono arrivati \u200b\u200bpre-ingrassati, dimensionalmente perfetti e con la frizione preimpostata correttamente, quindi ho potuto montarli e partire senza problemi. Questo tipo di affidabilit\u00e0 \"monta e dimentica\" \u00e8 esattamente ci\u00f2 di cui ha bisogno un contoterzista. Ho consigliato CMN ad altri due contoterzisti della mia zona e ora sono entrambi clienti abituali.\"<\/p>\nDavid Hartley, Hay Farmer, Canada
\n<\/strong> \"Utilizziamo un H7230 da 10 anni nella nostra azienda agricola di fieno misto in Ontario. In questo periodo, la macchina ha avuto tre diversi alberi cardanici, tra cui due costosi alberi Weasler acquistati dal concessionario New Holland. Quando anche il secondo ha avuto bisogno di essere sostituito, su consiglio di un vicino, mi sono rivolto a CMN Transmission. L'albero principale con giunto omocinetico 55N e l'albero secondario con doppio giunto omocinetico H8 sono arrivati \u200b\u200bben imballati e in ottime condizioni. L'albero principale \u00e8 ormai alla sua terza stagione di taglio completa senza alcun problema. In termini di costi, ho risparmiato circa 35-401 TP3T rispetto ai prezzi del concessionario. Il team tecnico ha risposto alla mia domanda sulle dimensioni delle scanalature via e-mail lo stesso giorno, cosa che ho apprezzato molto.\"<\/p>\nJean-Pierre Morin, Farmer, France<\/strong>
\n\u201cLa nostra azienda agricola nel Loiret utilizza un H7330 dal 2017. L'albero di presa di forza originale Bondioli & Pavesi si \u00e8 rotto dopo sei stagioni e i tempi di consegna del concessionario erano inaccettabili durante l'alta stagione. CMN Transmission ci ha spedito il kit di ricambio standard 55N dalla Corea in meno di una settimana. La qualit\u00e0 costruttiva \u00e8 davvero paragonabile all'originale, i giunti cardanici ruotano senza gioco e il profilo telescopico scorre perfettamente. Il servizio clienti \u00e8 stato molto professionale; parlano un ottimo inglese e hanno risposto a tutte le nostre domande tecniche. Un fornitore affidabile che consigliamo ai nostri colleghi agricoltori.\u201d<\/p>\nJames MacIntyre, Farm Owner, New Zealand<\/strong>
\n\"Gestiamo un'azienda agricola su larga scala specializzata nella produzione di insilato di loietto nell'Isola del Sud della Nuova Zelanda, con tre trinciatrici a dischi: una H7450 e due H7550. Reperire i ricambi per l'albero cardanico era un vero incubo logistico, data la distanza dai principali fornitori. CMN Transmission ha cambiato completamente la situazione. Il loro sistema di ordinazione online \u00e8 chiaro, il selettore dell'albero specifico per modello ha semplificato la scelta della corretta configurazione a doppio giunto cardanico da 55N per la H7450 e la spedizione \u00e8 arrivata ad Auckland entro sei giorni lavorativi. Tutti e tre gli alberi che abbiamo ordinato nelle ultime due stagioni si sono montati al primo tentativo senza bisogno di modifiche. Un prodotto solido, un buon prezzo e una velocit\u00e0 di consegna che rispetta davvero le esigenze degli agricoltori.\"<\/p>\nCarlos Eduardo Mendes, produttore rurale, Brasile<\/strong>
\n\u201cUtilizziamo una mietitrebbia H7460 nel Rio Grande do Sul per la raccolta di loietto e trifoglio destinati a fieno e insilato. Quando l'albero di trasmissione si \u00e8 rotto nel bel mezzo della raccolta, ho contattato urgentemente CMN Transmission. Mi hanno risposto in meno di due ore con le specifiche corrette per l'albero da 55N con frizione combinata per il modello da 1000 giri\/min. Il prodotto \u00e8 arrivato ben imballato e in perfette condizioni. La qualit\u00e0 della lavorazione \u00e8 nettamente superiore rispetto all'albero generico che utilizzavamo in precedenza: nessun gioco nelle forcelle e il profilo telescopico si muove senza resistenza. Acquisteremo sicuramente di nuovo da loro e li abbiamo gi\u00e0 consigliati ad altri produttori della regione.\u201d<\/p>\nRichard Pemberton, responsabile dell'azienda agricola, Regno Unito
\n<\/strong> \"Gestisco un'azienda agricola mista di 500 acri nello Shropshire e da anni utilizziamo un H7320 sul nostro sistema di presa di forza 540. Ci\u00f2 che apprezzo di pi\u00f9 di CMN Transmission \u00e8 la loro competenza tecnica, non solo i prezzi. Quando non ero sicuro se mi servisse l'albero 35N CV o l'albero quadro 35N per la mia posizione secondaria, li ho chiamati e ho parlato con qualcuno che conosceva a fondo la gamma di prodotti Discbine. Mi hanno guidato nella procedura di identificazione e hanno confermato la specifica corretta in cinque minuti. L'albero \u00e8 arrivato in due giorni e si \u00e8 montato senza problemi. Questa combinazione di conoscenza del prodotto e logistica efficiente \u00e8 ci\u00f2 che mi spinge a tornare da loro. Da allora ho ordinato separatamente il gruppo frizione a slittamento come ricambio per la manutenzione.\"<\/p>\nAlejandro Ruiz, Titolare, Argentina<\/strong>
\n\"Nella nostra azienda di servizi agricoli nella provincia di Buenos Aires utilizziamo principalmente un trattore H7230 per il taglio di erba medica e pascoli migliorati. L'albero cardanico originale si era usurato in corrispondenza del giunto universale dopo cinque stagioni e i costi del rivenditore locale erano proibitivi. CMN Transmission ci ha offerto l'albero cardanico di ricambio 55N a 40% in meno rispetto al prezzo del ricambio originale. La consegna \u00e8 avvenuta a Buenos Aires in otto giorni lavorativi, tutto era corretto e l'imballaggio intatto. Il montaggio \u00e8 stato perfetto, senza bisogno di adattatori. Ora stiamo completando due intere stagioni di taglio senza alcun problema. Il team del servizio clienti \u00e8 molto chiaro e disponibile nelle comunicazioni via e-mail.\"<\/p>","protected":false},"excerpt":{"rendered":"CMN Transmission manufactures high-quality PTO shafts for New Holland Discbine models H7220, H7230, H7320, H7330, H7450, H7460, H7550, and H7560 disc mower-conditioners. Each disc mower PTO shaft is engineered as a direct replacement for the original Weasler or Bondioli & Pavesi factory-installed units, with no modifications required for installation. Whether you operate a compact 65 HP side-pull H7220 or a heavy-duty 100 HP center-pivot H7560, our agricultural PTO shaft lineup covers the full power range from 540 RPM entry-level models right through to 1000 RPM high-output configurations.<\/p>","protected":false},"featured_media":6981,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[222,262],"product_tag":[232,228,242,234,264,233,226,229,263,265,235,243,225,230,231,224],"class_list":{"0":"post-6998","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-pto-shafts","7":"product_cat-pto-shaft-for-discbine","8":"product_tag-1000-pto-shaft","9":"product_tag-540-pto-shaft","10":"product_tag-agricultural-pto-shaft","11":"product_tag-custom-pto-shaft","12":"product_tag-disc-mower-pto-shaft","13":"product_tag-heavy-duty-pto-shaft","14":"product_tag-pto-drive-shafts","15":"product_tag-pto-driveline-shaft","16":"product_tag-pto-shaft-for-disc-mower","17":"product_tag-pto-shaft-for-discbine","18":"product_tag-pto-shaft-for-tractor","19":"product_tag-pto-shaft-manufacturers","20":"product_tag-pto-shafts","21":"product_tag-pto-shafts-for-sale","22":"product_tag-tractor-pto-drive-shaft","23":"product_tag-tractor-pto-shaft","25":"first","26":"instock","27":"shipping-taxable","28":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/product\/6998","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/comments?post=6998"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/media\/6981"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/media?parent=6998"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/product_brand?post=6998"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/product_cat?post=6998"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/it\/wp-json\/wp\/v2\/product_tag?post=6998"}],"curies":[{"name":"parola chiave","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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