Even if they can be found in almost all areas and are very widespread, tightening screws requires knowledge and experience. In the following we have put together information for you on how to properly tighten screws.
Tighten different screws correctly
Screws are used when fixed connections are required that, above all, have to be loosened again. However, they are also used where other connection techniques are not possible or are of poor effect. A rough distinction is made between screws as follows:
- Also Read - Lengthening a Screw
- Also read - screw in screws
- Also read - Fix screws
- Screws that cut their own mating thread
- Screws that are screwed into a mating thread
Tighten screws that cut their own mating thread
Wood screws, in the distant sense even sheet metal 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 builds up pressure on the cut thread so that the screw sits firmly.
If the screw is overtightened, it pulls out the mating thread and the screw no longer holds. Tightening the screw must therefore be done with feeling. Above all, this requires practical experience. You should therefore practice beforehand, especially with screws in relatively porous materials such as plasterboard.
Tighten screws that are turned into a mating thread
The same functional principle applies here as well. However, the mating thread is also of high strength, which is why very strong screw connections can be made. However, threads made from alloys also have their physical limits. Tightening such metal screws too tightly can cause various types of damage.
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 wrenches
In order to still be able to tighten metal screws to the maximum, the force used must be precisely metered. This is done using a torque wrench. Depending on the screw alloy and screw strength as well as the material into which the screw is turned, a certain torque is specified for tightening the screw.
Possibly a sequence to be observed with several screws
If several screws are tightened, it can even go so far that the screws have to be tightened in several steps and in a defined sequence (hand-tight, first torque, second torque, crosswise or in a spiral). You should therefore always know the required torque for metal screws.Tips & Tricks Screws that have been tightened too tightly can tear off when tightened further or when loosened. Here we show you in detail how to drill out a broken screw.