The trapezoidal thread according to the TR thread table is a metric thread with a 30° flank angle. It is particularly striking due to its unusual profile. The TR thread is not a pointed thread, but rather has the shape of an isosceles triangle. This striking shape also ensures that the threads in the TR thread table are particularly wide. As you can see from the TR thread table, this also leads to higher pitch dimensions.
Classic areas of application for the TR thread according to the table are lead screws, such as those found on lathes and screw presses. The large pitch facilitates power transmission and also enables the trapezoidal thread to withstand high axial forces. The good self-locking effect, on the other hand, ensures that the lead screw does not move on its own without the application of force.
The thread designation is made up of three components, as you can see in the TR thread table. The first is the abbreviation Tr, which serves to clearly distinguish it from other metric thread types. This abbreviation is followed by the nominal diameter and then the pitch.
In our TR thread table, you will find thread sizes from Tr 8 x 1.5 to Tr 300 x 12. Other values that you can find in our TR thread table are the core diameter of the external thread - i.e. the screw - and the core diameter of the internal thread - i.e. the nut. Thanks to our TR thread table, you have all the information you need to work with the TR thread.