{"id":2246,"date":"2026-05-08T09:29:40","date_gmt":"2026-05-08T09:29:40","guid":{"rendered":"https:\/\/www.agriculturalparts.top\/application\/pto-shaft-for-disc-mower\/"},"modified":"2026-05-08T09:29:40","modified_gmt":"2026-05-08T09:29:40","slug":"pto-shaft-for-disc-mower","status":"publish","type":"post","link":"https:\/\/www.agriculturalparts.top\/it\/application\/pto-shaft-for-disc-mower\/","title":{"rendered":"PTO Shaft for Disc Mower"},"content":{"rendered":"

PTO Shaft for Disc Mower \u2014 High-Speed Power Transmission for Precision Cutting<\/h2>\n

The PTO shaft for disc mower<\/strong> is a critical drivetrain component that connects the tractor’s power take-off output to the disc mower’s cutting gearbox. Operating at speeds of 540 RPM or 1000 RPM<\/strong>, it delivers the rotational energy needed to drive multiple spinning cutting discs at blade-tip speeds exceeding 80 m\/s. Whether you’re managing hayfields, roadside verges, or pasture in the vast agricultural regions of Australia, a well-engineered disc mower PTO driveshaft<\/strong> is the difference between a clean, efficient cut and costly downtime.<\/p>\n

Disc mowers impose one of the most demanding duty cycles on PTO shafts \u2014 rapid reversal when a blade strikes a stone, constant angular deflection as the mower follows terrain contours, and sustained high-RPM operation across long daily work hours. Our disc mower power shaft<\/strong> is purpose-designed to withstand these loads through CV (constant velocity) universal joints, wide-angle articulation capability, and an integrated friction-clutch overload protection<\/strong> system.<\/p>\n

\"Disc<\/p>\n

Explore our full range of agricultural PTO shafts and drivelines<\/a> or contact us<\/a> for custom fitment advice.<\/p>\n

Technical Specifications \u2014 PTO Shaft for Disc Mower<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nStandard Value \/ Configuration<\/th>\nCustomisable Range<\/th>\n<\/tr>\n<\/thead>\n
Series \/ Profile<\/td>\nSeries 4 \/ Series 6<\/td>\nSeries 3\u20138<\/td>\n<\/tr>\n
PTO Speed<\/td>\n540 RPM (std) \/ 1000 RPM (ECO)<\/td>\n540 \/ 1000 \/ 540E RPM<\/td>\n<\/tr>\n
Max Torque Capacity<\/td>\n1,200 N\u00b7m (S6)<\/td>\n400\u20133,500 N\u00b7m<\/td>\n<\/tr>\n
Max Power Transmission<\/td>\nUp to 95 kW<\/td>\n15\u2013220 kW<\/td>\n<\/tr>\n
Compressed Length<\/td>\n680\u2013900 mm<\/td>\n450\u20131,800 mm<\/td>\n<\/tr>\n
Extended Length<\/td>\n1,050\u20131,450 mm<\/td>\n700\u20132,500 mm<\/td>\n<\/tr>\n
Tube Profile<\/td>\nLemon \/ Triangular \/ Star<\/td>\nLemon, Tri, Star, Rect, Hex<\/td>\n<\/tr>\n
CV Joint Angle (each side)<\/td>\n\u00b135\u00b0<\/td>\n\u00b125\u00b0 to \u00b180\u00b0<\/td>\n<\/tr>\n
Input Spline (Tractor)<\/td>\n1-3\/8″ \u00d7 6 spline<\/td>\n1-3\/8″\u00d76, 1-3\/4″\u00d720, 1-3\/8″\u00d721<\/td>\n<\/tr>\n
Output Spline (Machine)<\/td>\n1-3\/8″ \u00d7 6 spline<\/td>\nCustom as required<\/td>\n<\/tr>\n
Overload Protection<\/td>\nFriction clutch (std)<\/td>\nFriction \/ Shear bolt \/ Ratchet \/ Cam<\/td>\n<\/tr>\n
Clutch Slip Torque Setting<\/td>\n800\u20131,100 N\u00b7m adjustable<\/td>\n300\u20133,000 N\u00b7m<\/td>\n<\/tr>\n
Guard Material<\/td>\nPE (polyethylene) full cone<\/td>\nPE \/ PP \/ Metal half<\/td>\n<\/tr>\n
Guard Fixing<\/td>\nNylon strap + chain<\/td>\nStrap, Chain, Integrated hinge<\/td>\n<\/tr>\n
Grease Nipple<\/td>\nStd Alemite (1\/8″ BSPT)<\/td>\nBSPT \/ UNF \/ Metric<\/td>\n<\/tr>\n
Greasing Interval<\/td>\nEvery 8 operating hours<\/td>\n8\u201350 hrs (sealed option available)<\/td>\n<\/tr>\n
Surface Finish<\/td>\nHot-dip galvanised + yellow zinc plating<\/td>\nZinc \/ E-coat \/ Powder coat<\/td>\n<\/tr>\n
Material (Yoke)<\/td>\nForged 20CrMnTi alloy steel<\/td>\n20CrMnTi \/ 40Cr \/ Cast iron<\/td>\n<\/tr>\n
Material (Tube)<\/td>\nCold-drawn seamless steel<\/td>\nSeamless \/ ERW<\/td>\n<\/tr>\n
Working Temperature Range<\/td>\n-30 \u00b0C to +80 \u00b0C<\/td>\n-40 \u00b0C to +100 \u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Working Principle & Structural Composition of the Disc Mower PTO Shaft<\/h2>\n

The driveline runs from the tractor’s rear PTO stub \u2014 located centrally at the rear axle \u2014 through a constant-velocity (CV) universal joint<\/strong> at the tractor end, along a telescoping shaft tube assembly, and into a second CV joint at the disc mower’s input gearbox. The telescoping inner and outer tubes allow the shaft to change length dynamically as the mower pivots on its hitch and rises or falls over undulating ground, while the CV joints maintain smooth torque delivery at articulation angles up to \u00b135\u00b0 per side.<\/p>\n

When a cutting disc strikes an embedded rock or stump, rotational energy spikes instantaneously. Without protection, this shock load would fracture the gearbox. The integral friction disc clutch<\/strong> seated in the tractor-end bell housing slips at a pre-set torque threshold (typically 800\u20131,100 N\u00b7m for a 3-metre disc mower), decoupling the inertial load of the spinning blades from the drivetrain in milliseconds. Once the obstruction clears, the clutch re-engages automatically \u2014 no operator intervention required.<\/p>\n

\"PTO<\/p>\n

Core Advantages of Our PTO Shaft for Disc Mower<\/h2>\n
\n
\n

Precision-Forged Yokes<\/strong><\/p>\n

Die-forged 20CrMnTi alloy steel yokes undergo heat treatment to 28\u201332 HRC, delivering 3\u00d7 the fatigue life of cast alternatives common in budget shafts.<\/p>\n<\/div>\n

\n

\u2699\ufe0f Wide-Angle CV Joints up to \u00b135\u00b0<\/strong><\/p>\n

Purpose-built for disc mowers that hitch high and fold for transport \u2014 no binding, no vibration, even at maximum tractor-to-mower angle.<\/p>\n<\/div>\n

\n

\ufe0f Automatic Friction Clutch<\/strong><\/p>\n

Field-adjustable slip torque protects your \u20ac4,000+ disc mower gearbox in the same fraction of a second it takes a blade to hit a stone.<\/p>\n<\/div>\n

\n

Telescoping Precision Fit<\/strong><\/p>\n

Cold-drawn seamless tube pairs machined to H7\/g6 tolerance \u2014 no slop, no rattle, consistent length feedback for operators setting hitch height.<\/p>\n<\/div>\n

\n

Full PE Safety Guard<\/strong><\/p>\n

OSHA \/ AS 4024-compliant full-cone polyethylene guard with nylon strap restraint shipped assembled \u2014 fit and run within minutes.<\/p>\n<\/div>\n

\n

OEM Cross-Reference Database<\/strong><\/p>\n

Over 12,000 cross-references on file; we confirm fit before dispatch, eliminating costly trial-and-error returns.<\/p>\n<\/div>\n<\/div>\n

Brand Compatibility, Spare Parts & Cross-References<\/h2>\n

Our pto shaft for disc mower<\/strong> is engineered as a direct drop-in replacement<\/strong> for shafts supplied as original equipment on the following brands: Kuhn, Claas, Kverneland, Morra, P\u00f6ttinger, New Holland, JF-Stoll, Vicon<\/strong>. We maintain a live cross-reference database of over 12,000 entries to confirm fit before dispatch.<\/p>\n

\u26a0\ufe0f Disclaimer: Brand names are referenced solely to assist equipment owners in identifying compatible replacement parts. We have no affiliation with these manufacturers.<\/em><\/p>\n

Spare parts available separately:<\/strong> Cross-kits (standard & sealed) \u00b7 Locking yoke collars \u00b7 Friction disc sets \u00b7 Shear bolt kits \u00b7 Guard sets \u00b7 Replacement cones \u00b7 Grease nipples \u00b7 Bearing cups<\/p>\n

\u2192 Browse all PTO shaft spare parts and accessories<\/a><\/p>\n

Regulations, Compliance & Regional Demand<\/h2>\n

Applicable Standards:<\/strong> Australia & New Zealand (AS\/NZS 4024.3601), CE marking (EN ISO 5673-1:2014+A1:2019), ASABE S203.12 dimensional standards. In Queensland and Western Australia, guarding compliance is required under Work Health & Safety Regulations 2011 for all PTO-driven machinery.<\/p>\n

Key Australian Demand Regions:<\/strong> Popular search regions: Victoria Wimmera wheat belt, South Australia Riverland, NSW Central West, Tasmania dairy country, WA Great Southern grain zone.<\/p>\n

Our products are shipped from bonded warehouse with full compliance documentation including: CE Declaration of Conformity (where applicable), ISO material certifications, dimensional inspection reports, and surface treatment test data. All products are invoiced in AUD with Australian GST where applicable.<\/p>\n

Quick Selection Guide \u2014 PTO Shaft for Disc Mower<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Selection Parameter<\/th>\nHow to Determine<\/th>\nGuidance<\/th>\n<\/tr>\n<\/thead>\n
Tractor PTO HP<\/td>\nMeasure from tractor spec sheet<\/td>\nSelect series rated \u2265 tractor HP; e.g., 80 HP \u2192 Series 5<\/td>\n<\/tr>\n
Mower working width<\/td>\n2.0\u20134.0 m typical<\/td>\nWider mower = higher torque demand<\/td>\n<\/tr>\n
PTO speed<\/td>\n540 or 1000 RPM<\/td>\nMatch mower input shaft spec exactly<\/td>\n<\/tr>\n
Hitch height \/ angle<\/td>\nMeasure max angle at full lock<\/td>\nNeeds CV joint if >20\u00b0<\/td>\n<\/tr>\n
Shaft compressed\/extended length<\/td>\nMeasure hitch to mower input<\/td>\nAllow 100 mm overlap min at full extension<\/td>\n<\/tr>\n
Overload protection<\/td>\nStone frequency in field<\/td>\nFriction clutch standard; ratchet for very rocky terrain<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Step-by-Step Installation Guide \u2014 PTO Shaft for Disc Mower<\/h2>\n
    \n
  1. [Safety]<\/strong> Disengage PTO and shut off tractor engine \u2014 place in park.<\/li>\n
  2. [Hitch setup]<\/strong> Attach disc mower to tractor’s 3-point linkage; set height so shaft angle < 30\u00b0.<\/li>\n
  3. [Tractor connection]<\/strong> Slide PTO shaft tractor-end yoke onto PTO stub, push until locking pin clicks.<\/li>\n
  4. [Mower connection]<\/strong> Attach machine-end yoke to disc mower input shaft; secure with locking collar.<\/li>\n
  5. [Length check]<\/strong> Check compressed length: overlap \u2265 1\/3 of inner tube length.<\/li>\n
  6. [Guard fitment]<\/strong> Attach safety guard nylon strap to tractor chassis bracket and machine bracket \u2014 guard must not rotate.<\/li>\n
  7. [Run-in check]<\/strong> Start tractor, engage PTO at low throttle, check for vibration or rubbing.<\/li>\n
  8. [Lubrication]<\/strong> Apply grease to all nipples (CV joints \u00d7 4, sliding profile \u00d7 2); torque yoke bolts per spec.<\/li>\n<\/ol>\n

    \"PTO<\/p>\n

    \ufe0f PTO Shaft Troubleshooting \u2014 Common Issues & Solutions<\/h2>\n
    \n\u26a0\ufe0f Excessive vibration at 540 RPM<\/summary>\n
    \n

    Root Cause:<\/strong> Shaft out of phase (yoke timing); worn CV joint bearing<\/p>\n

    Fix:<\/strong> Disassemble, reassemble yokes in-phase (same plane); replace CV cross-kit<\/p>\n<\/div>\n<\/details>\n

    \n\u26a0\ufe0f Clutch slipping under light load<\/summary>\n
    \n

    Root Cause:<\/strong> Friction discs glazed; spring preload too low<\/p>\n

    Fix:<\/strong> Clean discs with brake cleaner; increase spring preload by 1\/4 turn increments<\/p>\n<\/div>\n<\/details>\n

    \n\u26a0\ufe0f Shaft difficult to telescope \/ binding<\/summary>\n
    \n

    Root Cause:<\/strong> Dirt ingress into profile tubes; dented tube<\/p>\n

    Fix:<\/strong> Flush with WD-40; clean profile; replace tube if deformed<\/p>\n<\/div>\n<\/details>\n

    \n\u26a0\ufe0f Loud click on engagement<\/summary>\n
    \n

    Root Cause:<\/strong> Worn spline on tractor PTO stub<\/p>\n

    Fix:<\/strong> Inspect stub and shaft spline; replace worn component<\/p>\n<\/div>\n<\/details>\n

    \n\u26a0\ufe0f Guard overheating \/ melting<\/summary>\n
    \n

    Root Cause:<\/strong> Guard contact with spinning tube \u2014 strap not anchored<\/p>\n

    Fix:<\/strong> Reattach and tension guard retaining strap properly<\/p>\n<\/div>\n<\/details>\n

    Engineer’s Field Notes \u2014 Australian Case Studies<\/h2>\n
    \n
    \n

    Horsham, Victoria<\/p>\n

    John \u2014 320 ha cereal\/hay operation<\/p>\n

    “Replaced a worn OEM Kuhn shaft mid-season. “Drop-in fit, no modification, and the CV joint angle is noticeably smoother than the original. Cut 180 ha without a slip event.””<\/p>\n<\/div>\n

    \n

    Clare Valley, SA<\/p>\n

    Grange Vineyards \u2014 inter-row mowing<\/p>\n

    “”We run three disc mowers across vine rows. Having a supplier with the right compressed length saved us two weeks wait versus ordering through a dealer.””<\/p>\n<\/div>\n

    \n

    Tamworth, NSW<\/p>\n

    Luke \u2014 beef cattle grazing management<\/p>\n

    “”Shaft arrived in 4 days. Friction clutch saved our gearbox first day out when we hit a buried fence post. Best AU$340 I’ve spent.””<\/p>\n<\/div>\n

    \n

    Eyre Peninsula, SA<\/p>\n

    Paddy \u2014 mixed farming<\/p>\n

    “”Ordered two shafts for our Kverneland mowers. Exact same dimensions, cross-reference confirmed. No issues across the entire hay season.””<\/p>\n<\/div>\n

    \n

    Narrogin, WA<\/p>\n

    Merino wool property \u2014 pasture management<\/p>\n

    “”The sealed grease option means we get 50-hour intervals instead of 8 \u2014 massive time saver on a large sheep station.””<\/p>\n<\/div>\n<\/div>\n

    \u2753 Frequently Asked Questions<\/h2>\n
    \nWhat is the correct PTO shaft length for a disc mower?<\/summary>\n
    Measure the distance from the tractor PTO stub face to the mower input shaft face with the mower in working position. The shaft compressed length should be that distance minus 50\u201380 mm. At full extension the overlap should remain \u2265 1\/3 of the inner tube length to prevent tube separation.<\/div>\n<\/details>\n
    \nCan I use a standard cross-joint shaft instead of a CV shaft on my disc mower?<\/summary>\n
    Most disc mowers require a CV-type PTO shaft because the mower lifts significantly during transport, creating angles that exceed 20\u00b0. Standard cross-joint shafts cause vibration and premature wear above 20\u00b0. CV joints are recommended for all disc mower applications.<\/div>\n<\/details>\n
    \nHow often should I grease the disc mower PTO shaft?<\/summary>\n
    Standard shafts require greasing every 8 operating hours \u2014 CV joints (\u00d74 nipples) and the sliding profile (\u00d72 nipples). Sealed-bearing variants extend intervals to 50 hours. Never run without grease; dry CV bearings fail within minutes at 1000 RPM.<\/div>\n<\/details>\n
    \nWhat does the friction clutch setting mean?<\/summary>\n
    The slip torque (e.g., 900 N\u00b7m) is the maximum torque the clutch transmits before slipping. Factory default protects typical 3\u20133.5 m disc mowers. Increase slightly for wider\/heavier mowers or reduce for lighter mowers with smaller input gearboxes \u2014 always within the mower manufacturer’s recommended range.<\/div>\n<\/details>\n
    \nIs your shaft compatible with my Kuhn FC 280 G disc mower?<\/summary>\n
    Yes \u2014 we hold cross-references for all major Kuhn FC, GMD, and Merge Maxx series disc mowers. Provide your mower model and tractor PTO size when ordering and we confirm before dispatch.<\/div>\n<\/details>\n

    Related Products \u2014 Agricultural Gearboxes & PTO Accessories<\/h2>\n

    We manufacture the complete drivetrain ecosystem<\/strong> around PTO shafts. Our agricultural gearboxes<\/a> are engineered to pair perfectly with our PTO shafts for reduced system vibration and matched torque ratings.<\/p>\n

    \n
    \n\"Agricultural<\/p>\n

    Agricultural PTO Gearbox<\/p>\n

    Right-angle, inline, and multi-output gearboxes for all drive configurations.<\/p>\n

    View Gearboxes<\/a>\n<\/div>\n

    \n\"PTO<\/p>\n

    PTO Cross-Kit & Repair Sets<\/p>\n

    Full range of S3\u2013S8 cross-kits, bearing cups, and yoke repair components.<\/p>\n

    View Accessories<\/a>\n<\/div>\n

    \n\"PTO<\/p>\n

    PTO Safety Guards & Cones<\/p>\n

    Full-cone and half-cone PE guards, retaining chains, and strap kits.<\/p>\n

    View Guards<\/a>\n<\/div>\n<\/div>\n

    Partner with Us \u2014 OEM, Wholesale & Direct Supply<\/h2>\n
    \n

    Ready to Source a Reliable PTO Shaft for Disc Mower?<\/h3>\n

    Whether you need a single replacement shaft or are sourcing for a dealer network or OEM production programme, our team is ready to help. We offer:<\/p>\n