Online Knurling Calculator

[mklotz]

PJ's
is there a Site? or is it just the chart? I may be having a reeree moment here but wannted to make sure cause the way I read it it allowed you to input data to get computational data back for knurling work Yes?
Thanx either way

You don't really need a program if you have a calculator, even better if the calculator is programmable. Way back in post #22 of this thread, I wrote...

There's a knurling diameter calculator on my page (see my sig for URL) but, like PJ, it's a victim of the march of time. It's written to run in DOS so you need to install a DOS emulator to run it. The procedure is described on my page.

Actually, the calculation is quite straightforward and can be done with a calculator. It depends on the fact that the circumference of the workpiece should be an integral multiple of the pitch of the knurl.

Calculate the circular pitch of the knurl (p) by dividing the knurl circumference (pi * diameter) by the number of teeth on the knurl.

Divide the circumference of the workpiece (pi * diameter) by p to obtain a number (n). In general n will not be an integer. Truncate n to an integer.

Calculate the workpiece knurling diameter = n*p/pi

If you save the values of the circular pitch, once calculated, for each knurl, then only the last two steps are needed for each new workpiece.

Note that you must "truncate" n to an integer, not round it. As an example, 3.9 rounded to an integer is 4 but truncated the value is 3.