How to Calculate PCD (Pitch Circle Diameter)?
PCD is the short form of
Pitch Circle Diameter; the Pitch Circle Diameter (PCD) is the diameter of
that circle that passes through the center of all the bolt holes or wheel bolts
or wheel rim holes or studs. The
best example is Flanges, there are multiple holes in the Flanges, the circle through
the center of these holes is known as the pitch circle, and the diameter of this
circle is known as Pitch Circle Diameter, in short PCD. Look at the figures and
find the PCD of different stud arrangement circles.
Studs: the definition of a stud is “a
large-headed piece of metal that pierces and projects from a surface,
especially for decoration”, shown in the figure as different forms of stud
arrangement, such as 3 studs means 3 holes; 4 stud means 4 holes; 5 stud means 5
series of holes and so on.
