A Power Take-Off (PTO) shaft assembly is a mechanical component used to transfer power from a tractor or engine to an implement or attachment. It is a critical part of agricultural, industrial, and construction machinery, enabling the operation of equipment such as mowers, balers, pumps, and generators. The assembly typically consists of a shaft, universal joints, safety shields, and yokes, designed to transmit torque efficiently while accommodating misalignment between the power source and the driven equipment.
Our PTO shaft assemblies are engineered to meet high standards of performance and reliability. Below are the detailed specifications for our standard models:
| Model | Length Range (mm) | Diameter (mm) | Max Torque (Nm) | Max RPM | Spline Size | Weight (kg) |
|---|---|---|---|---|---|---|
| PTO-100 | 500-1200 | 30 | 400 | 1000 | 1-3/8" 6-spline | 5.2 |
| PTO-200 | 800-1500 | 40 | 800 | 900 | 1-3/8" 21-spline | 7.8 |
| PTO-300 | 1000-2000 | 50 | 1200 | 800 | 1-3/4" 20-spline | 10.5 |
| PTO-400 | 1200-2500 | 60 | 1800 | 700 | 2" 20-spline | 14.0 |
Note: Custom lengths, diameters, and spline configurations are available upon request to suit specific machinery requirements. All assemblies are tested for balance, fatigue resistance, and compliance with ISO and ANSI safety standards.
What is the purpose of a PTO shaft assembly?
A PTO shaft assembly transfers mechanical power from a power source, like a tractor, to an attached implement, enabling it to perform tasks such as cutting, pumping, or drilling without an independent motor.
How do I choose the right PTO shaft assembly for my equipment?
Consider factors like the required torque, RPM, length, spline size, and the type of implement. Match these to the specifications of your tractor's PTO output and the implement's input requirements. Consulting the equipment manual or a specialist is recommended.
What maintenance does a PTO shaft assembly require?
Regular lubrication of universal joints and sliding parts, inspection for wear or damage, and ensuring safety shields are intact. Replace worn components promptly to avoid failure and maintain safety.
Are PTO shaft assemblies universal?
No, they come in various sizes and configurations. Key differences include spline type (e.g., 6-spline vs. 21-spline), diameter, length, and torque capacity. It's essential to select one compatible with both the power source and implement.
What safety precautions should I take with PTO shafts?
Always engage the PTO only when the implement is properly attached and shields are in place. Never operate without safety guards, avoid loose clothing, and keep bystanders clear. Regularly check for shield integrity and secure connections.
Can a PTO shaft assembly be repaired or must it be replaced?
Minor repairs like replacing U-joints or shields are possible if the shaft tube is undamaged. However, if the shaft is bent, cracked, or heavily worn, replacement is safer to ensure reliability and avoid accidents.
What does the RPM rating on a PTO shaft mean?
It indicates the maximum rotational speed (revolutions per minute) the shaft can safely handle without risking imbalance, vibration, or failure. Exceeding this rating can lead to dangerous situations and equipment damage.
How do I measure the correct length for a PTO shaft assembly?
Measure the distance between the tractor's PTO stub and the implement's input shaft when both are in their operating positions. The shaft should be slightly shorter to allow for telescoping movement without binding, typically with a overlap of 1/3 to 1/2 of the telescoped length.
