Dowel Pins

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 m6 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:

Metric Pins

• BS 8734 / ISO 8734 A / ISO 8734 B limits
• BS 8735 / ISO 8735 A / ISO 8735 B limits
• ISO 2338A / ISO 2338A (stainless)
• DIN 6325
• DIN 7979
• DIN 7
• ANSI ASME B

Imperial Pins

• BS 1804 limits
• ANSI ASME B

All the DIN types listed below are available to purchase online at www.boneham.co.uk. With catalogues available here or at Who Sells It.com

Most commonly used in Construction, Aerospace. Automotive and Agriculture Engineering, and composites.

Dowel Pin Standards and Characteristics