540 PTO Shaft
A 540 PTO shaft is a standardized mechanical component used in agricultural machinery to transfer power from a tractor to an implement, such as mowers, balers, or tillers. Operating at 540 revolutions per minute (RPM), it uses a splined connector to ensure a secure fit. This shaft allows the tractor engine to efficiently drive external equipment, making it essential for farming operations.
540 PTO Shaft Dimensions


540 PTO Shaft Size Chart
Series | Shortest Length | Extended Length | Tractor End | Implement End | Common Uses |
1 | 27 | 34 | 1-3/8” x 6 QD | 1-3/8” x 6 QD | Fertilizer Spreader |
3 | 40 | 54 | 1-3/8” x 6 QD | 1-3/8” x 6 QD | Finishing Mower, Tiller |
4 | 30 | 40 | 1-3/8” x 6 QD | 1-3/8” Round | Finishing Mower, Tiller |
4 | 32 | 42 | 1-3/8” x 6 QD | 1-3/8” Round | Rotary Cutter |
4 | 36 | 43 | 1-3/8” x 6 QD | 1-3/8”x6 Clutch | Rotary Cutter, Tiller |
4 | 37 | 50 | 1-3/8” x 6 QD | 1-3/8” Round | Rotary Cutters, Pond |
4 | 42 | 58 | 1-3/8” x 6 QD | 1-3/8” Round | Post Hole Digger |
4 | 48 | 65 | 1-3/8” x 6 QD | 1-3/8” x 6 QD | Post Hole Digger |
4 | 53 | 74 | 1-3/8” x 6 QD | 1-1/4” Round | Post Hole Digger |
5 | 42 | 57 | 1-3/8” x 6 QD | 1-3/8” Round | Rotary Cutters |
12 | 48 | 64 | 1-3/8” x 6 QD | 1-1/4” Round | Heavy Duty Digger |
14 | 37 | 49 | 1-3/8” x 6 QD | 1-3/8” Round | Post Hole Digger |
14 | 56 | 77 | 1-3/8” x 6 QD | 1-3/8” Round | 5’ & 6’ Pull Cutters |
540 PTO Drive Shaft Accessories

Description | Female | Male | Extends* (in) | Weight (lbs) |
Reducer | 1-3/8” x 6 | 1-1/8” x 6 | 3-5/16 | 1.4 |
Increaser | 1-1/8” x 6 | 1-3/8” x 6 | 3-5/8 | 1.3 |
Extender | 1-3/8” x 6 | 1-3/8” x 6 | 3-5/16 | 2.2 |
Adapter | 1-3/8”x21 | 1-3/8”x6 | 3-1/4 | 2.0 |
Sleeve Increaser, 2” for Ford | 1-1/8” x 6 | 1-3/8” x 6 | 0 | 0.1 |
Sleeve Increaser, 2.25” | 1-1/8” x 6 | 1-3/8” x 6 | 0 | 0.1 |
Sleeve Increaser, Closed end | 1-1/8” x 6 | 1-3/8” x 6 | 1/2 | 0.2 |
Extender for Gresen Pump | 1-3/8” x 6 | 1-3/8” x 6 | 11-5/8 | 6.0 |
Spline Adapter, Screw Lock | 1-3/4” x 20 | 1-3/8” x 21 | 4-5/8 | 4.2 |
1-3/4” x 20 | 1-3/8” x 6 | 4-5/8 | 6.1 | |
Spline Adapter, Quick Release | 1-3/8” x 21 | 1-3/8” x 6 | 3-7/8 | 2.5 |
1-3/8” x 6 | 1-3/8” x 21 | 4-1/8 | 2.5 | |
Extender, Quick Release | 1-3/8” x 6 | 1-3/8” x 6 | 4-3/8 | 2.8 |
1-3/8” x 21 | 1-3/8” x 21 | 4-1/8 | 3.2 | |
Overrunning Clutch, Roll Pin | 1-1/8” x 6 | 1-3/8” x 6 | 3-13/16 | 5.0 |
1-3/8” x 6 | 1-3/8” x 6 | 3-13/16 | 5.0 | |
Overrunning Clutch, Quick Release | 1-3/8” x 6 | 1-3/8” x 6 | 3-7/8 | 7.2 |
Overrunning Clutch, QR, 100 HP | 1-3/8” x 6 | 1-3/8” x 6 | 4-3/4 | 9.0 |
Slip Clutch, Female Quick Release | 1-3/8” x 6 | 1-3/8” x 6 | 5 | 20.1 |
1-3/8” x 6 | 1-1/4” Round | 5 | 20.1 |
What is the 540 PTO Shaft with Slip Clutch?
The 540 PTO shaft with slip clutch is a critical component used to transfer mechanical power from a tractor to an attached implement, such as a mower, tiller, or wood chipper. The “540” refers to the standard rotational speed of 540 revolutions per minute (RPM), which is common in tractors under 100 horsepower.
The slip clutch is a torque-limiting safety mechanism integrated into the PTO shaft to protect both the tractor and the implement from damage due to excessive torque or sudden obstructions, like rocks or roots. It consists of friction discs, springs, and bolts that allow the clutch to slip when the torque exceeds a set threshold, reducing stress on the driveline. The clutch is adjustable, with spring tension set to match the implement’s requirements, and requires periodic maintenance to prevent rust or seizing. These shafts often include safety shields and can extend telescopically to accommodate varying implement lengths.

540 PTO Drive Shaft Features
(1) Standardized RPM Output
The 540 PTO shaft operates at an industry-standard 540 revolutions per minute (RPM), ensuring compatibility with a wide range of agricultural implements, including mowers, balers, and spreaders, for seamless operation across equipment.
(2) Splined Connection Design
It features a splined connection, typically with six splines, to provide a secure, slip-resistant fit between the tractor and the implement. This design minimizes power loss and enhances operational stability during heavy-duty tasks.
(3) Durable Construction Materials
Built from high-grade steel or alloy materials, the 540 PTO drive shaft is resistant to bending, corrosion, and wear. This durability ensures reliable performance, even under demanding agricultural workloads and harsh environmental conditions.
(4) Telescoping Shaft Mechanism
A telescoping design allows the shaft to adjust to varying lengths, accommodating different distances between the tractor and the implement. This flexibility enhances compatibility and ensures smooth power transfer over uneven terrain.
(5) Safety Guard Features
Equipped with protective shields or covers, the 540 rpm PTO shaft minimizes the risk of accidental contact with moving parts. These safety features comply with industry standards, ensuring operator protection during equipment operation.
(6) High Torque Transfer Capability
Designed to handle significant torque, the 540 PTO shaft efficiently transmits power from the tractor to heavy-duty implements. It ensures consistent performance, even during demanding agricultural operations like plowing or harvesting.
540 PTO Shaft Parts
- Yoke: The 540 PTO shaft yoke is a critical connecting component of the PTO shaft that links the shaft to the tractor and implement. It is designed with splines or grooves, ensuring a precise and secure fit for smooth power transfer without slippage.
- Universal Joints: Universal joints allow the PTO drive shaft to operate at various angles, accommodating movement between the tractor and the implement. These joints ensure consistent power delivery, even when operating over uneven terrain or during sharp turns.
- Telescoping Tube: The telescoping tube allows the PTO driveline shaft to adjust its length, enabling compatibility with different equipment setups. It ensures flexibility, prevents binding, and provides smooth operation in varying working conditions and distances.
- Steel Tube: The steel PTO shaft tube is the primary structural component of the PTO shaft. Made from durable, high-strength steel, it is designed to handle heavy loads, resist bending, and provide long-lasting performance under demanding agricultural tasks.
- Plastic Shield: The plastic shield is a safety feature that covers the rotating parts of the PTO driveline shaft. It protects operators from accidental contact with moving components, reducing the risk of injuries during operation.
- Security Chain: The security chain secures the plastic shield to the tractor or implement, preventing it from rotating with the shaft. This ensures the safety cover remains stationary, providing continuous protection during use.
- Shear Pin or Slip Clutch: A shear pin or slip clutch acts as a safety mechanism to protect the tractor PTO shaft and equipment from damage due to overload. It disengages or breaks under excessive force, preventing costly repairs.
- Cross and Bearing Kit: The cross and bearing kit is a vital component of the universal joints, allowing the PTO drive shaft to rotate smoothly. It ensures durability, reduces friction, and supports consistent performance under high torque and heavy loads.

How Does a 540 RPM PTO Shaft Work?
The PTO driveline shaft is connected to the tractor’s PTO output, typically using a splined yoke that fits securely onto the tractor’s PTO stub. The splines ensure a slip-resistant connection, allowing efficient power transfer. Once engaged, the tractor’s engine drives the PTO stub, causing the shaft to rotate. The rotating motion of the tractor PTO shaft is then transmitted to the implement, powering its internal components, such as blades, augers, or pumps.
The shaft incorporates universal joints that allow it to operate at various angles, which is essential when the implement and tractor are not perfectly aligned. Telescoping tubes in the shaft enable length adjustments, accommodating different distances between the tractor and the implement. Additionally, safety features like plastic shields and security chains protect operators from accidental contact with moving parts.
To prevent damage from sudden overloads, the shaft may include a shear pin or slip clutch, which disengages or absorbs excess torque. This mechanism safeguards both the 540 RPM PTO shaft and the connected equipment, ensuring reliable and safe operation during heavy-duty agricultural tasks.



Custom Your 540 PTO Shaft
As a leading 540 PTO shaft manufacturer and supplier, we tailor to meet the diverse needs of agricultural machinery. Our 540 PTO drive shafts are designed to power a wide range of equipment, including rotary cutters, flail shredders, feed mixers, rotary tillers, rotary mowers, snowblowers, discbines, spreaders, sprayers, mulchers, round balers, square balers, and post hole diggers. With a strong commitment to customization and innovation, AGKNX leverages its advanced R&D team and state-of-the-art manufacturing facilities to deliver solutions that enhance efficiency and reliability in agricultural operations.
Choose AGKNX now, your trustworthy agricultural PTO shaft manufacturers, to make your agribusiness more efficient and successful!
540 PTO Shaft vs 1000 PTO Shaft
Feature | 540 PTO Shaft | 1000 PTO Shaft |
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Rotational Speed | Operates at 540 revolutions per minute (RPM). | Operates at 1000 revolutions per minute (RPM). |
Shaft Diameter | Typically 1-3/8 inches (approximately 35 mm). | Typically 1-3/8 inches for small 1000 PTO, or 1-3/4 inches for large 1000 PTO. |
Number of Splines | 6 splines. | 21 splines (small 1000 PTO) or 20 splines (large 1000 PTO). |
Yoke Type | Standard six-spline yoke. | 21-spline quick-release yoke (small) or 20-spline yoke (large). |
Horsepower Capacity | Suitable for up to 50-60 HP due to torque limitations. | Can handle higher horsepower, often doubling capacity (up to 100+ HP). |
Common Tractor Size | Used on smaller or older tractors (under 80-90 HP). | Used on larger, modern tractors (90+ HP). |
Implement Compatibility | Compatible with medium-duty implements like mowers, tillers, and small balers. | Designed for heavy-duty implements like large balers, grain carts, and big mowers. |
Torque Requirements | Higher torque required due to lower speed, stressing driveline components. | Lower torque required at higher speed, reducing stress on components. |
Equipment Availability | More common, with a wider range of 540 RPM implements available. | Less common, fewer implements designed for 1000 RPM. |
Fuel Efficiency | May require higher engine RPMs, potentially increasing fuel consumption. | Allows lower engine RPMs for same implement speed, saving fuel. |
Maintenance Frequency | Less frequent maintenance due to lower speed. | May require more frequent maintenance due to higher speed and stress. |
Cost | Generally less expensive due to simpler design and widespread use. | More expensive due to higher performance capabilities. |
Safety Mechanisms | Often uses shear pin or slip clutch for overload protection. | Typically uses slip clutch for reusable protection in high-power applications. |
Application Environment | Better suited for dry, non-abrasive environments. | Suitable for wet, abrasive environments due to higher speed. |
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540 PTO Shaft | 1000 PTO Shaft |
540 PTO Driveline Shaft FAQ
What is the purpose of a Round Shaft to 540 PTO Adapter?
What is a 540 CV PTO Shaft?
What is a 540 PTO Shaft Coupler?
A 540 PTO shaft coupler is a connector that links the PTO shaft to the implement’s input shaft. It ensures secure and stable attachment, allowing for smooth power transfer. Couplers come in various designs to fit different shaft sizes and spline configurations.
What Is the Use of the 540 PTO Shaft Extension?
A 540 PTO Shaft Extension increases the length of the PTO shaft, providing additional reach for attaching implements that are positioned farther from the tractor. It helps improve operational flexibility and allows the use of larger or specialized equipment that requires extra spacing.