dowelpins

DowelPins are cylindrical rods used to precisely locate, align or fasten components in mechanical assemblies and woodworking. Available in a range of materials and forms, they serve as removable or permanent alignment features that control relative position and resist shear loads.

Common types include solid (cylindrical) dowel pins, split or spring dowel pins (slotted to allow press-fit flexibility), tapered pins (for tight alignment and easy removal), and wooden dowels used in furniture joinery. Metal dowel pins are typically made from carbon steel, stainless steel, brass or other alloys and may be hardened or ground for accurate dimensions; nonmetallic variants include nylon for corrosion resistance and isolation.

Standards from bodies such as ISO and DIN specify dimensional tolerances, fits and material treatments to ensure interchangeability. Installation methods vary: press-fit (interference fit) achieved by driving a pin into reamed holes, slip-fit for removable alignment, or adhesive bonding when required. Proper hole preparation and tolerance control are essential for reliable performance.

Applications span machine tools, automotive assemblies, jigs and fixtures, and furniture. Advantages include high positional accuracy, simplicity and low cost. Limitations are reduced capacity for tensile loads unless combined with fasteners, and the need for precise machining. Removal techniques include punching, extraction tools or drilling when pins are seized.