What should you consider when buying and using a torque wrench?
The most important question is what tightening torque do I need?
This information is given in Nm = Newton meters - it is helpful to know that 9.81 Nm corresponds to one kilo. Once you have determined your requirements, you can choose from a large number of different models and manufacturers such as Gedore, Unior, Hazet, Proxxon, Stahlwille, etc. The quality manufacturers of torque wrenches offer a large selection and very good quality. The deviation with such torque wrenches is usually 1 - 2% - which is very small. In addition to the setting range (e.g. 40 - 200 Nm), the size of the square for attaching the tool (socket) is also very important. Of course, there are torque wrenches with a square drive from ¼ up to 1".
When using the tool, ensure that the tightening motion is performed as smoothly and as smoothly as possible. A torque wrench is not a ratchet or extension bar for loosening tight screws. When the torque wrench is not in use, it should be "relaxed" – this ensures accuracy for years to come.