Tighten screws


Also, when they are found in almost every area and are very widely used, tightening screws requires knowledge and experience. Below we have compiled information for you how to tighten screws properly.

Tighten different screws correctly

Screws are used when solid connections are required, which above all must be solved again. But they are also used where other joining techniques are not possible or of bad effect. Roughly speaking, screws are distinguished as follows:

  • Screws that cut their own counter thread
  • Screws that are screwed into a mating thread

Tighten screws that cut their own counter thread

Wood screws, in the far sense even tapping screws, and also the screws that are turned into various other materials fall into this category. The functional principle is very simple. First, the thread is cut into the material. The thread in the screw creates pressure on the cut thread so that the screw is tight.

If the screw is over-twisted, it tears off the mating thread, the screw stops. The tightening of the screw must therefore be done with feeling. This requires above all practical experience. Especially with screws in relatively porous materials such as plasterboard should therefore be practiced in advance.

Tighten screws that are turned into a counter thread

Again, the same principle of operation exists. However, the counter thread of high strength, which is why very strong screw can be made. However, even threads made of alloys have their physical limits. If such metal screws are tightened too tight, this can result in various damages.

The thread of the screw can break, the screw head can be turned round. In the worst case, the screw can even tear off.]

Dealing with torque wrench

Nevertheless, in order to be able to tighten metal screws to the maximum, the force used for this purpose must be precisely metered. This is done using a torque wrench. Depending on the bolt alloy and bolt thickness as well as the material into which the bolt is turned, a certain torque is specified for tightening the bolt.

If necessary, observe an order with several screws

If several screws are tightened, this can even lead so far that the screws are tightened in several steps and in a defined sequence (hand-tight, first torque, second torque, crosswise or spiral-shaped). For metal screws you should therefore always know the necessary torque.

Tips & Tricks

Screws that have been tightened too tight can tear off during further tightening, but also when loosening. Here we show you in detail how to drill out a broken screw.


Video Board: Why Do Screws Tighten Clockwise?