dowelstift

A dowelstift, also known as a dowel pin, is a cylindrical rod used to align or join two components. It is typically inserted into matching holes to hold parts in precise relative position and to transfer shear forces. Dowelstifte are common in both woodworking and mechanical engineering, where they enable repeatable assembly and accurate alignment.

Common forms include solid cylindrical dowel pins, stepped dowel pins, and grooved or knurled variants. Some pins are designed for interference fits (slightly oversized relative to the hole) for a fixed connection, while others rely on a clearance fit for easy assembly and disassembly. In woodworking, wooden or composite dowels are used to reinforce joints and maintain alignment without hardware.

Materials vary by application. Wooden dowelstifte are popular in furniture and cabinetry for discreet joints. Metal dowel pins are typically made from steel or stainless steel and may be hardened for higher strength or knurled for better grip in a hole. Other materials include brass and various plastics for specialized tasks, such as reduced friction or non-marring surfaces.

Sizing and installation depend on hole dimensions and the desired fit. Holes are drilled or reamed to a precise diameter, and the pin is pressed or tapped into place with a hammer or press. Misalignment or damage to the hole can impede proper seating, so alignment during assembly is important. Lubricants or coatings may aid insertion when needed.

Applications range from furniture and cabinetry to machinery assemblies, automotive, and DIY projects. Dowelstifte offer a simple, economical means of achieving accurate alignment, repeatable assembly, and load transfer without visible fasteners.