Agricultural PTO Drive Shafts | Custom & Replacement Solutions
High-Torque Performance: Engineered for Heavy-Duty Agricultural Demands.
Browse PTO Drive Shaft Range
Each implement places different demands on the driveline. Browse our application-matched PTO shaft categories below to find assemblies with the right torque rating, clutch protection, and joint angle for your equipment.High Demand
PTO Shaft for Square Balers
Heavy-duty shafts with shear-bolt or friction-disc clutch protection, engineered for the high-inertia cyclic loads of plunger-type square balers. Series 6 and above recommended.
PTO Shaft for Round Balers
Continuous-rotation PTO assemblies with overrunning clutch protection. Sized for 540 RPM operation with wide-angle CV joints to handle tight tractor-to-baler geometry during turns.
PTO Shafts for Sale
Browse our full in-stock inventory of agricultural PTO drive shafts. Series 1 through 8 assemblies, ready to ship with CE-compliant guards, available in standard and wide-angle configurations.
PTO Shaft for Feed Mixers
Designed for sustained low-speed, high-torque mixing operations. Equipped with slip-clutch or cam-over protection to absorb sudden load spikes from tangled feed or frozen material.
PTO Shaft for Flail Shredders
Reinforced shafts rated for continuous high-RPM operation. Impact-resistant U-joints and heavy-wall telescoping tubes handle the shock loads generated by high-speed flail impact on debris.
PTO Shaft for Discbines
Precision-balanced PTO assemblies for disc mower-conditioners. Features constant-velocity joints for smooth power delivery at operating angles up to 80 degrees during header swing.
How to Choose the Right Agricultural PTO Drive Shaft
Selecting the wrong PTO shaft can lead to premature U-joint failure, gearbox damage, or unsafe operating conditions. Follow these five steps to match your tractor and implement correctly.
Match Horsepower & Torque Rating
The PTO shaft must exceed the implement's required horsepower. For a 120 HP rotary cutter, specify at least a Series 6 shaft rated for 150+ HP to maintain a safe operating margin.
Verify PTO Speed — 540 or 1,000 RPM
Most tillage and mowing implements run at 540 RPM, while large balers and forage harvesters require 1,000 RPM. Always check the implement manual before ordering.
Measure Compressed & Extended Length
Measure from the tractor PTO stub to the implement input shaft with the implement in its closest working position (compressed) and fully extended during turns. Allow a minimum 6-inch overlap of telescoping tubes.
Identify Spline Count & Yoke Type
Common tractor-side splines: 1-3/8" 6-spline (540 RPM), 1-3/4" 20-spline (1,000 RPM), or 1-3/8" 21-spline (540/1,000 RPM). Confirm implement-side yoke bore and connection style.
Choose Clutch Protection Type
Shear-bolt clutches suit intermittent shock (mowers, tillers). Friction-disc clutches handle cyclic overloads (balers). Overrunning clutches prevent implement fly-back when the PTO disengages under load.
PTO Shaft Series Quick Reference
| Series | Cross Kit (mm) | HP Rating | Typical Application |
|---|---|---|---|
| Series 1 | 22 × 54 | Up to 20 HP | Light-duty mowers, small augers |
| Series 2 | 23.8 × 61.3 | Up to 30 HP | Finish mowers, spreaders |
| Series 3 | 27 × 70 | Up to 40 HP | Post hole diggers, seed drills |
| Series 4 | 27 × 74.6 | Up to 60 HP | Rotary cutters, tillers |
| Series 5 | 30.2 × 80 | Up to 75 HP | Round balers, feed mixers |
| Series 6 | 30.2 × 92 | Up to 120 HP | Square balers, large mowers |
| Series 7 | 35 × 106.5 | Up to 180 HP | Forage harvesters, large spreaders |
| Series 8 | 42 × 106.5 | Up to 250 HP | Heavy grain carts, industrial pumps |
Replacement PTO Shaft Series
Each implement places different demands on the driveline. Browse our application-matched PTO shaft categories below to find assemblies with the right torque rating, clutch protection, and joint angle for your equipment.High Demand
PTO Shaft Replacement of Walterscheid
PTO Shaft Replacement of Weasler
PTO Shaft Replacement of Bondioli & Pavesi
Agricultural PTO Drive Shaft FAQ
Common questions from farmers, fleet operators, and implement dealers across Canada and the United States.
What is an agricultural PTO drive shaft and how does it work?
An agricultural PTO drive shaft is a telescoping mechanical assembly that transfers rotational power from a tractor’s Power Take-Off (PTO) output stub to an implement’s input shaft. It typically consists of two yokes connected by universal joints, inner and outer telescoping tubes (lemon, star, or triangular profile), a plastic safety guard, and an overload protection device such as a shear bolt or friction-disc clutch. The PTO output rotates at either 540 or 1,000 RPM, and the shaft transmits that torque across the variable distance and angle between the tractor and implement as they move through the field.
How do I measure the correct length for a replacement PTO shaft?
Measure the distance from the end of the tractor PTO stub to the input shaft of the implement with the implement in its closest working position — this is your compressed length. Then extend the implement to its maximum travel and measure again for the extended length. The replacement shaft must telescope to cover both extremes while maintaining at least 6 inches (150 mm) of tube overlap to prevent the inner and outer tubes from separating during operation.
What is the difference between 540 RPM and 1,000 RPM PTO shafts?
A 540 RPM PTO uses a 1-3/8″ diameter stub with 6 splines and is the standard for most tillage, mowing, and light-to-medium duty implements. A 1,000 RPM PTO uses a 1-3/4″ diameter stub with either 20 or 21 splines and is designed for high-power implements such as large square balers, forage harvesters, and high-capacity grain carts. Some modern tractors offer a 540/1,000 economy mode with a 1-3/8″ 21-spline stub. Never connect a 540 RPM shaft to a 1,000 RPM output or vice versa without proper adaptor verification.
How often should I grease my PTO drive shaft?
For greaseable U-joints, apply NLGI Grade 2 lithium-based grease to each cross bearing every 8 operating hours. The telescoping tube profiles should be greased with a thin film of lithium or moly grease before the start of each season and again at mid-season. If you are using sealed (maintenance-free) U-joints, no routine greasing is needed at the cross bearings, but the telescoping tubes still require seasonal lubrication. Always check the guard bearings at the same interval.
Can EPG Canada supply custom-length PTO shafts for non-standard implements?
Yes. We manufacture PTO drive shafts in custom compressed and extended lengths. Provide us with the tractor model, implement type, compressed and extended measurements, PTO speed (540 or 1,000 RPM), and spline specifications. Our team will recommend the appropriate series, yoke profile, and clutch protection type, and deliver a fully assembled, guarded shaft ready to install. Contact Effie at <a href=”mailto:[email protected]“>[email protected]</a> or call <a href=”tel:+16047192870“>+1-604 719 2870</a> for a same-day quotation.