a tool used for cutting the thread of a screw, typically having a toothed edge which is pressed against the object as it is turned on a lathe.
| 单词 | θ212349 |
| 释义 | society > occupation and work > equipment > machine tool > other specific machine tools > [noun] > machine for cutting screw-threads > tools (3) screw tool1797 a tool used for cutting the thread of a screw, typically having a toothed edge which is pressed against the object as it is turned on a lathe. chaser1847 A tool used for cutting the threads of screws. hob1873 (Also hub.) ‘A hardened, threaded spindle, by which a comb or chasing-tool may be cut’ (E. H. Knight Pract. Dict. Mech.). Also: a master tap. |
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