Ironside torque wrench 1/2 450 mm 42-210NM, IR117108

Torque is expressed in newton metres (Nm). Many manufacturers of vehicles, machines and structures specify the tightening torque for a given bolt. With a torque wrench, you follow that prescribed value, instead of working by feel.

For which tasks do you use a dynamometric wrench 1 2

A torque wrench is useful for connections where the tightening torque matters. Think of wheel nuts, parts of a vehicle or machine, flange connections and structural components. With too little torque, a connection can come loose, with too much torque the thread or bolt can be damaged. Always check the prescribed tightening torque in the documentation of the part you are installing.

What does the range of 42 to 210 Nm mean

The measuring range indicates within which values you can set the torque. A torque wrench works best in the middle of its range. If your prescribed tightening torque is close to the lower or upper limit, the accuracy is usually less good. So check whether the values you use fall well within 42 to 210 Nm. For lower torques, a wrench with a smaller range is more suitable.

How to use and maintain a torque wrench

Set the desired torque and pull the wrench on the handle with a smooth motion, until you feel or hear the signal from the wrench. Do not use the wrench to loosen bolts, and do not keep pulling beyond the signal. After use, return the wrench to the lowest setting, unless the manual states otherwise, so the spring is not kept unnecessarily tensioned. With intensive use, have the wrench checked regularly to monitor its accuracy.

Frequently asked questions

What does 1/2 mean on a torque wrench?

It is the size of the square drive of the wrench. You fit a matching socket there, so you can combine the wrench with 1/2 inch sockets.

Can I also loosen bolts with this wrench?

A torque wrench is intended for tightening to a specific torque. To loosen stuck bolts, it is better to use a regular ratchet or another wrench, to preserve the accuracy of the torque wrench.

How often should a torque wrench be checked?

That depends on how often and how intensively you use the wrench. For professional use, having it checked regularly is advisable, so the set torque remains accurate.