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Bolt Circle Calculator

Calculator Menu

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

Number of Holes N
Diameter of Bolt Circle  in  mm
Diameter of Holes
Angle of First Hole degrees
Offset of Center     Y 
 
 
Tap & Die Set, 39-Piece Solid Round Dies
  • 39-piece machine screw & fractional tap and solid round die set
  • Machine screw and fractional sizes of plug style taps plus 1" solid round dies
  • Includes three tap handles and two die stocks
  • 18-leaf standard thread pitch gauge and screwdriver
  • Plastic case with lift-out tray

$269.95

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Sensitive Drill Feed and 1/8" (3 mm) Keyless Drill Chuck
  • Fingertip control for drilling small holes
  • Helps prevent drill breakage
  • 0JT taper, 1/2" diameter precision ground straight shank
  • Spring loaded 3/4” travel fits most drills, mills, lathes or jig borers
  • Capacity: 0” - 1/8" (0 - 3mm ) Keyless drill chuck

$164.95

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Bench Grinder, 8" Low Speed
  • Powerful 1 HP motor
  • No load speed 1750 RPM
  • Adjustable tool rests
  • Adjustable safety eye shield and spark resistors

$299.95

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