[Utah Smitty]

I found this link when looking for a way to calculate the bolt circle diameter for the drive flange on my Honda GX610 engine.

http://littlemachineshop.com/mobile/bolt_circle_dia.php

You just enter the number of evenly spaced holes in the circle and the center to center distance between two adjacent holes. It works in metric and English measurements.

To determine the center to center distance accurately, use a dial caliper and measure the outside to outside distance between the holes, (the inside tips at the top of the calipers work good for this) then measure the circle diameter, and subtract it from your hole to hole measurement.

Hope you find it useful.

Smitty

 

[Bill 76]

Thanks Smitty,I got to print that out and put it in the garage.Someone showed me how to do it using math but it was a mind blower,this looks a ton easier.

 

[Utah Smitty]

Yeah, I know there's a way to do it with math, but this works faster.

Smitty

 

[KennyP]

Very nice calculator, Smitty! That could come in handy!

 

[ducky]

Thanks Smitty! That is neat.

 

[KC9KAS]

Thanks, Now I can get rid of this!

 

[Utah Smitty]

Thanks, Now I can get rid of this!

LOL!!!

Smitty

 

[Utah Smitty]

The other obvious advantage is in determining bolt center diameter for wheels with an odd number of holes- 3, 5, 7 :smilewink:

etc.

Smitty