Tap_or_Die
Cast Iron
- Joined
- Apr 4, 2014
- Location
- Oklahoma, USA
Hi everybody,
I usually dont cut 316, and this project might be a long term customer if I can get my tooling to last. It seems that we are blowing through inserts faster than I anticipated. Maybe I'm just not used to 316. I'll list my processes, speeds and feeds, along with inserts and tooling so maybe you guys can tell me whats needs changed. I know we are all busy so thanks in advance.
Facing/turning, roughing/finishing - 500 sfm /.085 max-.03 min doc /.006-.009 ipr feed(insert sandvik "ccmt 12 04 08-mm 2025")
-inserts are lasting around 3-4 parts
Thread mill 1/4-npt - 200 sfm /.0015 ipr feed / tried one pass. nope, tried 4 passes, nope, kennametal insert (grade kc635m)
-having tons a trouble with this. First insert broke, second chipped cutting edge.
-Thread milling is my main concern as it seems to hate it. A ton a vibration and inserts are not cheap. My fear is I'm getting some deflection in the spindle which is not allowing full cut on the thread. Should I try to tap it instead?
Boring, roughing/finishing - 400 sfm /.002-.004 ipr feed / .015 doc (insert is vpgt 221f, which is an older insert).
-I cant find a tool that has a 35 deg insert set at 107 deg lead like this one (https://www.mscdirect.com/product/details/51865111) but smaller. I have to clearance the insert to keep from rubbing the part. starting with 3/8 hole .210 deep.
-this insert lasts a little longer, 5-6 parts.
I usually dont cut 316, and this project might be a long term customer if I can get my tooling to last. It seems that we are blowing through inserts faster than I anticipated. Maybe I'm just not used to 316. I'll list my processes, speeds and feeds, along with inserts and tooling so maybe you guys can tell me whats needs changed. I know we are all busy so thanks in advance.
Facing/turning, roughing/finishing - 500 sfm /.085 max-.03 min doc /.006-.009 ipr feed(insert sandvik "ccmt 12 04 08-mm 2025")
-inserts are lasting around 3-4 parts
Thread mill 1/4-npt - 200 sfm /.0015 ipr feed / tried one pass. nope, tried 4 passes, nope, kennametal insert (grade kc635m)
-having tons a trouble with this. First insert broke, second chipped cutting edge.
-Thread milling is my main concern as it seems to hate it. A ton a vibration and inserts are not cheap. My fear is I'm getting some deflection in the spindle which is not allowing full cut on the thread. Should I try to tap it instead?
Boring, roughing/finishing - 400 sfm /.002-.004 ipr feed / .015 doc (insert is vpgt 221f, which is an older insert).
-I cant find a tool that has a 35 deg insert set at 107 deg lead like this one (https://www.mscdirect.com/product/details/51865111) but smaller. I have to clearance the insert to keep from rubbing the part. starting with 3/8 hole .210 deep.
-this insert lasts a little longer, 5-6 parts.