The thread shown in the S thread table is the metric saw thread in accordance with DIN 513. Saw threads are characterized by their striking profile, which is asymmetrical. It actually resembles a saw tooth, from which the name is derived. This means that saw threads such as those in the S thread table are particularly designed for high axial loads acting on one side and are often used as movement threads. Typical areas of application for the saw thread according to the S thread table are, for example, screw presses or lifting presses. Although the metric saw thread according to DIN 513 is only one of several saw threads, it is the most common of these. Saw threads according to other standards - such as the DIN 20401 standardized thread with an identical structure but opposite tooth direction - are used more in specialized work environments such as mining.
The special geometry of the metric saw thread must also be taken into account when using the S thread table. The flank angle of the metric saw thread is 33°, although you need to look at this specification more closely than with other thread types. This is because the flank angle is made up of two values. A distinction must be made here between the load-bearing and the non-load-bearing flank. For the saw thread according to the S thread table, there is a 30° angle between the non-load-bearing flank and an imaginary line running perpendicular to the axis. The remaining 3° lie between this imaginary line and the load-bearing flank. The pitch P in the S thread table refers to the distance between two load-bearing flanks.
The thread designation used in the S thread table is made up of the abbreviation S, the nominal dimension and the pitch. All specifications are in mm. The S thread table covers a wide range of thread sizes, from the smallest value S 10 x 2 up to S 300 x 24. Also shown in the S thread table is the bolt diameter required for a particular size. We have also indicated the correlating core hole diameters for the nut threads in the S thread table.