Article
Article
Taper pin
Article By:
Black, Paul H. Department of Mechanical Engineering, Ohio University, Athens, Ohio.
Last reviewed:June 2020
DOI:https://doi.org/10.1036/1097-8542.677800
A tapered self-holding pin used to connect parts. Standard taper pins have a diametral taper ¼ in. in 12 in. (0.6 cm in 30 cm) and are driven in holes drilled and reamed to fit. The pins are made of soft steel or are cyanide-hardened. They are sometimes used to connect a hub or collar to a shaft (see illustration). Taper pins are frequently used to maintain the location of one surface with respect to another. A disadvantage of the taper pin is that the holes must be drilled and reamed after assembly of the connected parts; hence they are not interchangeable.
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