DIN 7 Dowel Pins
DIN 7 Dowel Pins are solid cylindrical pins precision manufactured to a Tolerance Class of m6, which is oversized, and h8, undersized. The tolerance range is referred to as the "limit deviations" and "tolerance zone" and varies by pin diameter. For example, an M8 m6 pin has a tolerance of +0.006 to +0.015 mm but an M8 h8 pin diameter is 0 to -0.022 mm. These parallel pins, devoid of a head, are radiused or chamfered at both ends. Press into press-fit holes and avoid impact force (striking the pins can cause them to splinter). They are used as guide and wrist pins, plug gauges, valve plungers, shafts and are well suited to align parts. Steel pins are unhardened and plain finish, rendering them susceptible to rust. Length does not include the radiused or chamfered ends, which can add 0.3 to 8.0 mm to the length depending on the dowel pin's diameter (DIN 6325, ISO 2338 and inch series dowel pins are all measured end to end).