Dowel Pins Technical Information

Dowel pins are cylindrical instruments intended to firmly attach various workpieces together within equipment. They work well for reassembling electronics in alignment.

dowel pin

Diagram of dowel pin

Materials:

Alloy steel is the strongest of all steel types. It has high tensile strength and offers excellent resistance to wear, fatigue, and galling.

Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat. It is used in high-stress, outdoor, and corrosive applications.

Standards:

DIN regulates German standards for a variety of parts and industries, but its first standard – published in 1918, according to the DIN Timeline – regulated the manufacturing of taper pins. As the organization grew, it encompassed a wider range of standards with a focus on quality assurance. It joined ISO in 1961 after establishing itself as a leading voice in European standards.

DIN 6325 Dowel Pins are headless parallel pins hardened and ground to a precise diameter. One end is chamfered 15° and radiused to aid with insertion while the other end is radiused.

ISO is perhaps the most well-known standard organization in existence, as it owns almost 25,000 standards in industries. In the fastener realm, many ISO standards originated as DIN standards; such standards may now have different names, but they are essentially the same thing (some slight variations exist). For example, ISO 133337 used to be known as DIN 7346 . The two names represent the same standard, which regulates the dimensions of metric light-duty roll pins.

The ISO 8734 dowel pins are straight headless shear fasteners that have chamfered ends. An ISO 8734 Dowel Pin helps aid its insertion and alignment. The ISO 8734A Plain Steel Parallel Dowel Pin helps keep the parts aligned in place. These pins are manufactured in precise fractional diameters and lengths.