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Shear Bolt Torque Limiter for PTO Shaft

Shear bolt torque limiters type SB is devices able to interrupt power transmission when the torque transmitted exceeds the setting. This interruption in power is caused by the shearing of a bolt. This bolt must be replaced before power can be restored. The use of shear bolt torque limiters is recommended to avoid damage to drivelines mounted on implements subject to accidental overloads or torque peaks.

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Shear Bolt Torque Limiter for PTO Shaft

Shear Bolt Torque Limiter

Shear bolt torque limiters type SB is devices able to interrupt power transmission when the torque transmitted exceeds the setting. This interruption in power is caused by the shearing of a bolt. This bolt must be replaced before power can be restored. The use of shear bolt torque limiters is recommended to avoid damage to drivelines mounted on implements subject to accidental overloads or torque peaks.

Note: For the safety of the operator and the reliable function of the driveline, replace the bolt only with one equal in length, diameter, and grade to the original.

The torque setting for shear bolt torque limiters is usually two or three times the median torque M and must never exceed the maximum torque of the driveline (Max). Standard settings for each size of SFT driveline are in the table to the right. SB torque limiters size S1 to S4 have a pushpin attachment to the splined shaft. Larger sizes use a taper-pin attachment.

Shear Bolt Torque Limiter

Shear Bolt Torque Limiter Specification

Model Number Shear Bolt Torque Limiter
Function Power transmission Yoke
Use PTO shafts
Place of Origin Zhejiang, China (Mainland)
Brand Name PRECISE
Yoke Type push pin/quick release/ball attachment/collar/double push pin/bolt pins/split pins
Processing Of Yoke Forging
Spline Type 1 3/8" Z6; 1 3/8 Z21 ;1 3/4 Z20;1 1/8 Z6; 1 3/4 Z6; 8*42*48*8; 8*32*38*6

Shear Bolt Torque Limiter Parameter

Series Torque Spline A(mm) B(mm) C(mm) D(mm)
1SB 570 1 3/8" Z6 95 20 35 M6*40
1SBT1 740 45
2SB 740 98 45 M6*40
2SBT1 790 48
3SB 1110 102 21 38 M8*45
3SBT1 1200 40
4SB 1400 107 48 M8*50
4SBT1 1600 55 M8*50
5SB 1600 114 21 46 M8*45
5SBT1 2100 60 M10*50
6SB 1750 137 55 M8*55
6SBT1 2500 55 M10*55
32SB 1600 114 24 46 M8*45
32SBT1 2100 46 M10*50
7SB 2050 152 45 M10*60
7SBT1 3200 49 M12*65

Shear Bolt Torque Limiter Parts

Shear Bolt Torque Limiter

  1. Yoke
  2. Grease nipple
  3. Steel ball
  4. Hub
  5. Pushpin
  6. Shear bolt&Nut

How Do Shear Pin Torque Limiters Work?

Shear pin torque limiters are a simple, cost-effective design for protecting equipment from torque overloads. When torque is being transmitted from the driving to the driven load, the pin experiences a shear force. If the transmitted torque causes a force that exceeds the pin’s shear strength, the pin breaks and the driving and driven loads are immediately de-coupled. This immediate de-coupling of the load makes the shear pin design a type of “disconnect” torque limiter.

It limits the torque thanks to the shearing of a bolt, which must be replaced to reset the transmission of power. The intervention torque depends on the distance of the bolt from the axis of transmission, its diameter and class of resistance.

When the torque exceeds that supported by the bolt, the latter shears and the power transmitted is annulled. To restore the transmission, the sheared bolt must be replaced with one having the same characteristics (diameter, class of resistance, threaded portion and length) as the original bolt. Special design on request. Works in both directions of rotation.

PTO Slip Clutch VS PTO Shear Bolt

Replacing sheared bolts requires stopping work, getting off the tractor, and swapping bolts out. You need to keep a good supply of shear bolts to hand when using your machinery. Whereas the PTO slip clutch allows for the drive to be stopped when needed and resume the torque when free of any obstructions.

Other PTO Shaft Accessories

PTO Shaft Accessories

Shear Bolt Torque Limiter Manufacturers

HZPT covers an area of more than 12000 square meters and employs more than 100 people. We specialize in developing, manufacturing, and selling PTO shafts, industrial universal shafts, automobile drive shafts, universal joint coupling shafts, universal joints, etc. The annual turnover is 60 million yuan and 9 million US dollars, increasing year by year. Our products enjoy a high reputation among customers in Europe, the United States, Asia, Australia, and North America. We are the top three professional OEM suppliers of many agricultural tool factories in the domestic market. HZPT transmission shaft adheres to our “QDP” principle: quality first, rapid delivery, and competitive price. We have obtained CE, TS / 16949, and ISO9001 certification, and have systematic production equipment and a QC team to ensure our quality and delivery. We warmly welcome friends from all walks of life to visit and establish mutually beneficial long-term cooperative relations.

Our Services

1) Competitive price and good quality

2) Used for transmission systems.

3) Excellent performance, long using life

4) Can develop according to your drawings or samples

5) Following the customers' requirements or as our usual packing

6) Brand name: EPT or we can make according to every customer's requirement.

7) Flexible minimum order quantity

8) Sample can be supplied

For more information about us, contact us right away.We will do our best to meet your requirement of the product and provide the most perfected after-sales services for you.Feel free to take a closer look around our pages, and if you have interested in, please enquiry to us your favorite items.

Triangular End Yoke for PTO Shaft

PTO Shafts & Agricultural Gearboxes are Available.

A PTO shaft is a highly sophisticated mechanism that allows implements to draw energy from an engine. It works with a mechanical agricultural gearbox. A PTO shaft can be mounted on a vehicle's transmission, and is an essential part of the system. A high-quality PTO shaft should be durable enough to withstand torsion and minimize vibration.

The agricultural PTO gearbox is designed to change the output speed of a PTO drive shaft. It can be used as a decreasing or increasing ratio gearbox. With the decreased ratio gearbox, it reduces the PTO shaft's speed from 1000 rpm to 540 rpm, allowing you to use equipment designed for 540 rpm. On the other hand, an increasing ratio gearbox increases the speed of the PTO shaft from 540 rpm to 1000 rpm.

HZPT manufactures a wide range of durable PTO shafts and agricultural gearboxes to meet all your requirements.

PTO Shaft and Agricultural Gearbox

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Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

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