jason udall | 01/08/2014 20:25:54 |
2032 forum posts 41 photos | As to length...any draw collet like 5c etc. Will pull back further ( even if hydralic rather than drawbar) if part is smaller and vice versa... Now how much effect will depend on taper of collet and variation of part... A dead stop of any kind that moves with collet will suffer the same A dead stop that doesn't move with collet will need to"displace" the part against the collet jars as they pull back.. How we fixed this in production was a dead stop on the turret Inset part .turret /stop in . Part to stop ..close collet. .. A sprung stop in the collet keeps the part against stop... Even so some pull back can still happen... But only the final fraction of the collet close travel.... Dead length collets like the Crawford collet multibore systems fix this by keeping the collet still and moving the tapered seat. |
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