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Bolt Circle Calculator

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Enter values below to calculate the coordinates of the holes in a bolt circle.

Number of Holes N
Diameter of Bolt Circle D   in  mm
Diameter of Holes d 
Angle of First Hole A  degrees
Offset of Center X     Y 
 
 
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  • Set of ten R8 round collets in metric sizes
  • Hardened and ground to close tolerance
  • Made of high grade tool steel
  • 7/16" -20 drawbar thread
  • 0.0007" (0.018 mm) maximum runout

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