| 摘要 |
A tool holder movable toward work cut or reamed by the tool. The holder has a frontal head containing a tool carrier; and the latter is floatingly disposed in a marginal spring contained in the head. A coupling keeps the tool carrier from turning relative to the head, but allows the tool carrier to deviate laterally in the floating leeway in the event of irregularities or off-center conditions in the work. An intermediate ring between the tool carrier and the outer head portion has a feature to lock the tool carrier endwise in the head.
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