A bolt circle diameter or pitch circle diameter (PCD), sometimes simply called bolt circle or pitch circle, is a common term for when a number of screw holes for bolts are evenly distributed with their centers along an imaginary circle with a given diameter. An example of use is mounting of car rims, where the bolt circle is one of several factors that determine whether a set of rims will fit a car.
A bolt circle diameter or pitch circle diameter (PCD), sometimes simply called bolt circle or pitch circle, is a common term for when a number of screw holes for bolts are evenly distributed with their centers along an imaginary circle with a given diameter. An example of use is mounting of car rims, where the bolt circle is one of several factors that determine whether a set of rims will fit a car.
Source: Wikipedia "Bolt circle" · CC BY-SA 4.0
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