Bolt Circle Coordinates

For 3, 4, 6, and 8 Hole Bolt Circles

Information Generously Provided to Metal Web News
By: Sparro Machine Products

3-Hole and 6-hole Bolt Circle

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4-hole bolt circle
( rotated 45 O )

and 8-hole bolt circle

 

Measure the Un-Measurable

When It's Not Possible to Measure Across a Bolt Circle

( Odd Number of Holes, Hub or Shaft Interference )

Or to check the hole spacing on a known bolt circle

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Note: To Measure Center Distance, see: Locating Center Distances for Holes

 

find a B.C.

check a B.C.

E ÷ .866

B.C. x .866 = E

 

find a B.C.

check a B.C.

E ÷ .707

B.C. x .707 = E

 

find a B.C.

check a B.C.

E ÷ .588

B.C. x .588 = E

 

find a B.C.

check a B.C.

E ÷ .500

B.C. x .500 = E

 

find a B.C.

check a B.C.

E ÷ .383

B.C. x .383 = E

 

find a B.C.

check a B.C.

E ÷ .309

B.C. x .309 = E

 

find a B.C.

check a B.C.

E ÷ .259

B.C. x .259 = E


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Created: 06/16/2001
Last Rev: