| 单词 | jig borer |
| 释义 | > as lemmasjig borer jig borer n. (a) a machine for drilling holes in or machining the surfaces of a component (esp. a jig (sense 6e)), usually having a vertical spindle mounted above a table which can be accurately positioned relative to the spindle; (b) (see quot. 1972). ΘΚΠ society > occupation and work > equipment > machine tool > other specific machine tools > [noun] > machine for drilling template jig borer1932 society > occupation and work > worker > workers according to type of work > manual or industrial worker > workers with specific materials > metalworker > [noun] > borer, slotter, or chamferer slotter?1881 broaching machinist1921 chamferer1921 jig borer1932 1932 A. P. Gwiazdowski & C. B. Lord Econ. Tool Engin. xiii. 189 A Swiss firm..developed a large jig borer that derives its accuracy from its lead screws. 1941 W. C. Durney Machine Shop Pract. v. 149 In the majority of modern engineering establishments, manufacturing jigs and fixtures in any quantity, these pieces of vital auxiliary apparatus are usually machined up in jig borers. 1959 Times 5 Oct. (Switzerland Suppl.) p. vii/3 Over one thousand sip jig-borers are installed in the United Kingdom to-day. 1972 Classif. of Occup. (Dept. Employment) III. 290/2 Jig borer, [one who] sets up and operates a jig boring machine to drill and bore holes in workpieces to extra fine limits of accuracy. < as lemmas |
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