My friend needs new threads cut for the filter base that an air dryer filter threads on to(basicaly looks like a large oil filter). This is an air dryer system for the air brakes on a unimog.
He swears that the new filter he gave me is American with standard threads, but on further inspection it looks like it's metric. So I set up the lathe for metric and cut the threads, but it's still a no go.
How can I figure out the thread count when I have nothing in the shop for determining metric threads, I'm 99.9% sure I have it correct at M39 x 1.5 . Maybe I don't have my cutter shapened properly, is it okay to assume that the threads are still cut at 60 degree Sharp-V. Or is there another thread pitch I should sharpen it to.
Thanks in advance, Chad
He swears that the new filter he gave me is American with standard threads, but on further inspection it looks like it's metric. So I set up the lathe for metric and cut the threads, but it's still a no go.
How can I figure out the thread count when I have nothing in the shop for determining metric threads, I'm 99.9% sure I have it correct at M39 x 1.5 . Maybe I don't have my cutter shapened properly, is it okay to assume that the threads are still cut at 60 degree Sharp-V. Or is there another thread pitch I should sharpen it to.
Thanks in advance, Chad