June 2021 Tip: Coordinate Constants from Outside

Coordinate Constants from Outside:

These are used for establishing coordinate hole locations from

the outside of a bolt circle with equally spaced holes. The holes
can be aligned to a reference point on a centerline or equally spaced on both sides of the centerline.

• To use these values, first, select the required number of holes for the bolt circle. 

• Next, choose the appropriate type of coordinate reference location (either on the centerline or between the holes). 

• Then, multiply the diameter of the bolt circle by the constant value shown in the chart. 

The resulting answers represent the coordinate locations of the holes from the "X" and "Y" reference edges for the specified diameter of the bolt circle.

The full PDF can be downloaded and includes coordinate constants for 3 to 12 holes. Contact me if you prefer that I email this to you instead.

Sample: Coordinate constants from outside for 4 holes

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