Dowel Pins

Steel dowel pins are precision hardened and ground parallel pins, engineered to tight tolerance limits, for accurate locating and alignment, in drilled and reamed holes. Fine-Parts offer a complete range of hardened steel and stainless steel dowel pins, both plain and tapped (internally threaded), in either metric or imperial standard measurements. Custom pins to drawing can also be quoted and manufactured to most customer requirements. Fine-Parts also manufacture a tapped dowel pin extractor tool in metric sizes M3 – M10 and also to BSW, BSF, UNC, and UNF upon request.

Dowel pins are ground cylindrical pins primarily manufactured for precise locating devices in machinery and assemblies. Steel dowel pins are machined to tight tolerances with the DIN and ISO standard pins being M3 -M10 on the diameter. The corresponding holes are usually reamed to allow for a press fit, clearance fit or transition fit.

When designing engineered components, dowel holes are often used as reference points to control positioning alignment to attain repeatable assembly quality. When dowel pins are pressed into blind holes it is recommended that dowels with ‘air release flats’ are used to allow displacement of air preventing damage to the work piece or the ejection of the dowel.

Steel dowel pin standards include: