FINAL WEEK - BENCH LATHE SALE!!!

All BENCH LATHES are on SALE through OCTOBER!... View Sale Products!

Menu

Bolt Circle Diameter Calculator

Calculator Menu

Enter values below to calculate the diameter of a bolt circle.

Number of Holes N
Center Distance Between Adjacent Holes in mm
 

Tip:

To measure the center distance between two holes of equal diameter with an electronic caliper.

1. Use the inside jaws to measure the diameter of one of the holes. Before you remove the caliper from the hole, press the button to zero the caliper while it is set to the diameter of the hole.

2. Still using the inside jaws, measure the distance between the far surfaces of the two holes. The caliper reading is the distance between centers of the two holes.

 
SPECIAL OF THE WEEK
Keyless Drill Chuck, 5/8" $39.95

More information
Keyless Drill Chuck, 5/8"
HiTorque 7350 Deluxe Mini Lathe - 7x16
  • Features of 5100 (most powerful, most low-speed torque, gearless spindle, cam-lock TS, 4" chuck)
  • Includes DRO readouts on compound rest, cross slide, and tailstock
  • Metal hand wheels and chrome levers
  • Includes 0XA wedge-type quick change tool post and five tool holders
  • CHUCK GUARD HAS NOW BEEN REMOVED

$1,899.00

More products like this
SpillMaster Container
  • Avoid workbench spills
  • Holds cutting fluids and lubricants
  • Will NOT spill, even when upside down
  • Durable polyethylene for long life
  • Spill proof container includes applicator brush

$10.95

More products like this
Upgrade Kit, Mini Mill
  • Includes 2258 Air Spring Kit and 2560 Mini Mill Belt Drive Kit
  • Much quieter operation
  • Spindle speed up to 4300 RPM
  • Allows travel to the top of the column while providing better support for the mill head
  • No more broken drive gears

$219.95

More products like this