| 摘要 |
A collet for an automatic bar feed machine tool having an outer sleeve 20 and an inner sleeve 21 reciprocable in the outer sleeve, a spring 26 to bias the inner sleeve 21 away from the gripping region 28 of the outer sleeve. Bar stock 33 is gripped in the collet by the outer sleeve end 22 acting on the end 29 of the inner sleeve, the bar being fed through the collet and short ends 36 falling away from the collet during feeding so that bar can be continuously fed through the collet without having to stop the machine to remove short ends.
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