Torque wrenches
This category groups together measuring and tightening tools designed to apply a precise and verifiable torque. It meets the need to ensure the reliability of mechanical assemblies and to avoid damage caused by over-tightening or under-tightening.
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Selection guide for a torque wrench
Choosing a torque wrench is primarily based on defining the target torque and selecting the tool format suited to your working environment.
The torque range is the main technical criterion. A tool should not be used below 20% or above 80% of its maximum capacity to guarantee its accuracy and longevity. It is advisable to verify that the torque value required for your assemblies falls within the middle zone of the selected tool's range.
The wrench format determines its ergonomics and accessibility. Ratchet models are preferred for their versatility and ability to adapt to different intervention angles. Disc or beam models are often more compact, making them essential for work in confined spaces.
Reading accuracy is essential for the final result. Modern wrenches integrate locking mechanisms for the set torque to prevent accidental changes during use. Clear graduations and an ergonomic grip facilitate visual control and comfort during repeated tightening operations.
Technical selection criteria
| Criterion | Selection advice |
|---|---|
| Torque range | Verify that the torque value required for your assembly corresponds to the measurement range of the tool. Prefer a tool whose range covers the target value without exceeding it too much. |
| Format and ergonomics | Select the format (ratchet, beam, disc) based on the space available around the tightening point and the need to adapt the intervention angle. |
| Locking system | Ensure that the wrench has a locking mechanism for the set torque to guarantee that the defined value does not vary accidentally during use. |
| Socket type | Check the drive square size (e.g., 1/4", 1/2" or 3/8") to ensure compatibility with the sockets and bits you usually use. |
Frequently asked questions about torque wrenches
How to choose the right torque range for my wrench?
The torque range must cover the target value for your assembly. It is recommended to use the tool in its middle zone, generally between 20% and 80% of its maximum capacity, to guarantee optimal accuracy.
What is the difference between a ratchet wrench and a beam wrench?
The ratchet wrench is versatile and adapts to various intervention angles thanks to its ratchet mechanism. The beam wrench is more compact and linear, making it ideal for very tight spaces where a ratchet wrench could not pivot.
How to set the torque on a torque wrench?
Torque is usually adjusted by rotating the grip of the tool to raise or lower the value indicated on the scale. Once the target value is reached, the locking mechanism must be activated to fix the setting.
What drive square size should I choose?
The choice of drive square (1/4", 1/2", 3/8") depends on the sockets and torques to be applied. Small squares are suitable for low torques and narrow spaces, while larger squares are designed for higher torques.