Bolt hole circle without a mill

[Andrew Blair]

Originally Posted by sanddrag

There was the word "accurate" in there.

A decent compass is as accurate as the person using it. My hand happens to be a bit shakey evidently.

[Bill_Hancoc]

but still not quite the level of accuracy achieved by using (what i assume is) a quility lathe

[Dick Linn]

Dividers can be very accurate IF you can find the center and mark the bolt circle accurately. It's a matter of developing layout skills.

[John Gutmann]

What about on of those compases that have the thread shaft throught the middle and screw pen and closed.....That is if you know what I am talking about.....