View Full Version : Need Help! Thread Mills

02-13-2010, 07:28 AM
Hi All,
does anyone know of a supplier of off the shelf thread mills, 40 tpi, with a 55 degree whitworth form, perferably in the uk.

Thanks in advance


02-13-2010, 09:30 AM
I have on occassion, taken a mill that was half the thread count (i.e. 20 tpi) and made two passes. Not horribly efficient, but functional for a few parts.

02-13-2010, 09:36 AM
ehhh, nm, wasn't thinking of your thread form, bad advice

02-16-2010, 11:01 PM
If you have a single toothed thread cutter, you can have any tpi with it, though the process would be less efficient.

02-16-2010, 11:15 PM
OD or ID thread and what size.

If it is OD you can cut just about any size using a lathe threading tool in the spindle, but as mentioned it is not efficient.

You can also mill internal threads using a latge tool but then your ID has to be larger than about 1" because the tip sweeps out a circle larger than the bar it is mounted on.

02-22-2010, 03:51 PM
If you can't find a supplier, you could try what JustGary did in this thread. (http://www.cnczone.com/forums/showthread.php?t=75806&highlight=threadmill)

Larry O