4SB.B 40hp 27*74.6 joint shear bolt Spline Yoke agricultural machinery & equipment agricultural spare parts

Introducing the 4SB.B 40hp 27*74.6 joint shear bolt Spline Yoke, a high-quality, ISO & CE certified agricultural spare part that forms an integral component of various agricultural machinery and equipment. Leveraging the robustness of 45C material and offering a 1-year warranty, this shear bolt spline yoke is designed for superior performance and longevity. With a weight of 2.3 KG and a vibrant yellow colour, it stands as a testimony to the superior quality and aesthetics.

Advantages of the Shear Bolt Torque Limiter

A shear bolt torque limiter for a PTO shaft is a simple yet effective mechanical device designed to protect agricultural machinery from torque overload. Here are some key advantages of using a shear bolt torque limiter:

1. Overload Protection: The primary function of a shear bolt torque limiter is to protect the tractor and attached implement from damage. The shear bolt is designed to break under excessive torque, disconnecting the power transfer and preventing damage to the driveline and machinery.
2. Ease of Maintenance: Due to the simple design, they require minimal maintenance. Checking and replacing the shear bolt is usually all that is needed.
3. Ease of Installation: Installing and replacing shear bolts is a straightforward process that can usually be done quickly and without specialized tools.
4. Immediate Response to Overload: In the event of a torque overload, the shear bolt breaks immediately, providing instant disconnection of the power transfer. This quick action can be crucial in preventing mechanical failures.
5. Wide Application Range: Shear bolt torque limiters can be used with a variety of agricultural implements, making them versatile components of farm machinery.

Applications of the Shear Bolt Torque Limiter

A shear bolt torque limiter on a PTO shaft is a crucial safety device in agricultural machinery, designed to protect equipment from torque overload. This simple yet effective mechanism finds its applications in various scenarios where a sudden increase in load or blockage could cause damage. Here are some common applications of shear bolt torque limiters in agriculture:

1. Harvesting Machinery: In harvesting equipment like combines and forage harvesters, shear bolt torque limiters prevent damage during heavy or obstructed harvesting operations.
2. Tillage Equipment: Used in plows, harrows, and cultivators to prevent damage from striking hidden obstacles, such as large stones or hard soil clumps.
3. Rotary Cutters and Mowers: Protects rotary cutters and mowers when they hit obstructions like rocks or thick roots, preventing damage to the blades and drive mechanism.
4. Balers: Ensures that balers, especially round balers, don't get overloaded when processing large amounts of crop material, which can cause mechanical failures.
5. Seeders and Planters: Protects seed drills and planters from damage due to clogs or excessive resistance when planting in tough soil conditions.
6. Manure Spreaders: Vital for manure spreaders, protecting the driveline from torque overload when spreading varying densities of manure.

Agricultural PTO Shaft Torque Limiter Types

In agricultural machinery, PTO shaft torque limiters are crucial for protecting equipment from damage due to torque overload. There are various types of PTO shaft torque limiters, each designed to cater to different operational needs and specifications. Here's an overview of the common types:

1. Shear Bolt Torque Limiter: This type utilizes a shear bolt that breaks under excessive torque, disconnecting the drive between the tractor and implement. Common in a variety of implements; ideal for situations where overload conditions are clear and easily detectable.
2. Friction Clutch Torque Limiter: Friction clutch limiters slip when the torque exceeds a preset level, allowing it to absorb the excess force without breaking. Used in applications where gradual overload conditions might occur and frequent replacement of shear bolts is not desirable.



3. Ratchet Torque Limiter: Features a ratcheting mechanism that allows rotation in one direction and locks or slips in the opposite direction when overloaded. Suitable for implements like augers where unidirectional operation is required.
4. Overrunning Clutch Torque Limiter: Allows free rotation in one direction and engages the clutch in the other. It can also incorporate a torque-limiting feature to disconnect under overload. Commonly used in mowers and rotary cutters, allowing the implement to overrun when the tractor slows down.

How Does the Shear Bolt Torque Limiter Work?

A shear bolt torque limiter for a PTO shaft is a simple yet effective mechanical device designed to protect agricultural machinery from torque overload. Here's how it works:

1. Normal Operation: During regular operation, the shear bolt holds the PTO shaft and the implement (like a mower, baler, or tiller) securely together. The bolt is strong enough to transmit the necessary torque from the tractor to the implement without breaking.
2. Torque Overload Detection: The key to the system is the shear bolt's designed breaking point. When the torque transmitted through the PTO shaft exceeds the safe operating limits ?? due to an obstruction, overload, or other mechanical issues ?? the increased force exceeds the shear strength of the bolt.
3. Activation: Upon reaching its threshold, the shear bolt breaks or shears off. This breakage is a mechanical response to the overload, acting as a protective mechanism.
4. Disengagement: The breaking of the shear bolt effectively disconnects the drive from the tractor to the implement. This immediate disengagement stops the transfer of excessive torque, thereby preventing potential damage to the tractor's PTO system, the implement, or other driveline components.

PTO Shaft Shear Bolt Torque Limiters Troubleshooting

Troubleshooting issues with PTO (Power Take-Off) Shaft Shear Bolt Torque Limiters is important for maintaining the functionality and safety of your agricultural machinery. Here are common problems and troubleshooting steps for these devices:

1. Frequent Shearing of the Bolt: Causes: Excessive load or incorrect use of the implement. Incorrect bolt size or grade not matching the manufacturer's specification. Solutions: Ensure the implement is used as per guidelines. Replace the bolt with one that matches the exact specifications (size, grade, and shear strength) recommended by the manufacturer.
2. Bolt Not Shearing When Expected: Causes: The bolt used may be too strong or of a higher grade than necessary. The implement may not be experiencing enough load to reach the shear point. Solutions: Verify that the correct shear bolt is being used. Check if the implement is being used correctly and under appropriate conditions.
3. Difficulty in Removing Sheared Bolt: Causes: Corrosion or rusting of the bolt in place. Bolt sheared off in a way that makes it difficult to grip. Solutions: Apply penetrating oil to the bolt remnants and allow it to soak in to loosen. Use proper tools like vise grips or extractors to remove the broken bolt.
4. Uneven Wear or Damage to the Limiter: Causes: Continuous operation under high stress. Lack of maintenance or improper installation. Solutions: Regularly inspect the torque limiter for wear or damage and replace parts as necessary. Ensure the torque limiter and the shear bolt are correctly installed.

Maintenance of Shear Bolt Torque Limiter

Maintaining a shear bolt torque limiter in agricultural machinery is crucial for ensuring safety and preventing mechanical damage. Regular maintenance helps ensure that the torque limiter functions correctly when needed. Here are key maintenance steps for a shear bolt torque limiter:

1. Regular Inspection: Regularly inspect the torque limiter for any signs of wear, corrosion, or damage. Pay particular attention to the condition of the shear bolt and its housing. Ensure that the shear bolt is not showing signs of premature wear or bending. Any deformation may indicate an incorrect bolt or excessive loads.
2. Correct Shear Bolt Replacement: Always use shear bolts that match the manufacturer's specifications in size, length, grade, and shear strength. Using incorrect bolts can lead to failure in protecting the machinery. Always have spare shear bolts available. After a shear bolt breaks (which indicates it has done its job), it needs to be replaced before using the equipment again.
3. Proper Installation of Shear Bolts: When installing a new shear bolt, tighten it to the torque specified by the manufacturer. Over-tightening can increase the force required for the bolt to shear, while under-tightening may cause it to shear prematurely. Ensure that the bolt is properly aligned and seated in its housing.
4. Cleaning and Lubrication: Keep the area around the torque limiter clean from dirt, debris, and rust. Accumulated dirt can affect the function of moving parts. Some torque limiters may have components that require lubrication.

Why Choose HZPT's Shear Bolt Torque Limiter for PTO Shaft?

HZPT Drive Shaft Co., Ltd., located in Hangzhou Zhejiang City, two hours to the Pudong Airport and one hour to the Xiaoshan Airport & the East of Hangzhou Station, Covered more than 12,000 m2 with over 100 people on staff. We specialize in developing, manufacturing, and marketing PTO shafts, agricultural gearboxes, PTO shaft accessories, PTO shaft u-joints, torque limiters, PTO shaft tubes, PTO shaft yokes, PTO shaft adaptors, industrial cardan shafts, car driveshafts, u-joint coupling shafts, etc. The annual turnover is 60 million RMB, 9 Million Dollars, and It??s increasing year by year. Our products gained a great reputation from European, American, Asia, Australian, and North American customers. We are the top professional OEM supplier for many agricultural implement factories in the domestic market. HZPT Driveshaft insisted on our principles: Quality first, Deliver quickly, and Price Competitive. We already have the CE, TS/16949, and ISO9001 certificates with systematic manufacturing types of equipment and a QC team to guarantee our quality and delivery. We warmly welcome every friend to visit us and establish a mutually beneficial long-term relationship cooperation.

At HZPT, we take pride in our professionalism, international certifications, customized services, state-of-the-art production facilities, and comprehensive after-sales services. We are committed to delivering the highest quality products that meet and exceed our clients' expectations. Our relentless pursuit of excellence has enabled us to establish a strong foothold in the market and cater to a global clientele.

Check out this introduction video for more insights into our shear bolt torque limiter:

Author: Yjx