hi everyone. i m trying to make some gear cutting hob 1.5 module and i am having a bit of a problem. i followed some instructions i found online but i am stuck. i made a lathe tool that has 40 degrees tip and when i try to create the necessary rack form all hell comes loose. i tried it on a mini 7x12 lathe and on a C6 with the same results. when getting 2mill deep the lathe starts either vibrating or making a high pitch sound and some times just grabs in and stops. i tried various speeds and angles on the tool with always the same result. the best behavior i had was at around 100 rpm but the lathe did not have torq that low. stock diameter is 20mm and the depth of cut 5.1mm
any ideas?
please help.
thanks
Greg