Check out the LittleMachineShop.com YouTube Channel.

Videos showcasing our machines, our tools, simple How-To's and NOW videos from Frank Hoose and his wealth of information on bench top machining. LEARN MORE 

Menu

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 
 
 
SPECIAL OF THE WEEK
Transfer Punch Set 3/32" to 1/2" $14.95

More information
Transfer Punch Set 3/32" to 1/2"
Metal Transmission Gear Kit, Mini Lathe
  • Replaces both plastic transmission gears with metal
  • Fits mini lathes and 3MT mini mills
  • Small Gear: 12 Teeth / 20 Teeth, 12 mm Bore, 4 mm Keyway
  • Large Gear: 21 Teeth / 29 Teeth, 30 mm Bore, 5 mm Keyway

$67.95

More products like this
Lathe Dog Set, 0-40mm
  • Set of 5 lathe dogs for material up to 1.5" (40 mm)
  • M6 and M8 drivers

$39.95

More products like this
Machinist Calc Pro 2 Machinists Calculator
  • The first dedicated handheld machining math and reference tool
  • Calculate speeds and feeds, right triangle solutions, bolt patterns and much more

$99.95

More products like this