runner1957
Plastic
- Joined
- Sep 26, 2017
Hi all, I have a sandvik 880 drill, 34mm, running 2200 rpm and .0065 feed, 4140 annealed, in a doosan TTSY mill turn. Running less than 70% spindle load. Using Hardinge A80 collet chuck, 2-5/8" round serrated collets, max force for the chuck, according to hardinge is 10,100 pounds force. Samchully cylinder calcs out at 300psi hydraulic for 10,549#. Drill's running like butter, besides slowing the feed, what can I do to stop the material from sliding back. This is a barfeed application. Can't dead stop it. Moves back about .1-.25"
Thanks
Unrelated, anyone got good tricks for getting thread chips out of bores? Using the machine....not my hands....??
Thanks
Unrelated, anyone got good tricks for getting thread chips out of bores? Using the machine....not my hands....??