Threading Tools 2018 by Sumitomo

More catalogs by Sumitomo | Threading Tools 2018 | 23 pages | 2018-07-11

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Page 5 of Threading Tools 2018

sec-threading tools basics of threads ■ parts of the thread thread angle thread thread root lead angle i root diameter effective diameter d internal external root diameter effective diameter d helix lead angle r length of one revolution pitch p effective diameter d external thread lead angle internal thread effective diameter (d) thread groove width that has a virtually comparable cylinder diameter to the thread width pitch (p) adjoining thread distance lead ( i ) thread movement amount after one revolution ● how to calculate a lead angle i tan r x×d 1 section threads are comparable with the pitch n×p x×d lead angle(α) a corner that forms a right angled flat surface between the thread helix and thread axis r lead angle i lead n number of threads p pitch d effective thread diameter ■ basic profile of major thread forms bsw bsp r0.137p external thread external thread internal thread 5/16p 60° unj r external thread rpt bspt r0.137p 1°47′ 90° external thread internal thread 30° 30° npt 90° 1°47′ external thread 1/4p unc unf f internal thread un 60° h external thread basic profile unef 1/8p external thread grooving internal thread 30° 30° cut-off h gpf r0.137p internal thread 27.5° 27.5° unified thread r0.137p rcpt bspt application symbol taper us pipe thread w external thread basic profile internal thread h internal thread r0.137p 55° h witworth thread external thread rpps 55° taper pipe thread 1/8p r0.137p gpf application symbol taper us pipe thread h m internal thread internal thread h 60° basic profile threading tools metric thread internal thread 1/4p application symbol h basic profile thread for aerospace parallel threads for pipe instruments application symbol nptf threading 90° 1°47′ external thread ■ holder and insert selection guide sste type/ssti type left threading right threading external diameter spindle forward rotation internal diameter spindle forward rotation external diameter spindle reverse rotation external holder internal holder sste type ssti type external holder sste type inserts for external machining inserts for internal machining inserts for external machining 16er type 16ir type 16er type shim shim shim ye3-3p/ye3-2p ye3-1p/ye3/ye3-1n yi3-3p/yi3-2p yi3-1p/yi3/yi3-1n ye3-3p/ye3-2p ye3-1p/ye3/ye3-1n external holder internal holder external holder sste type ssti type sste type inserts for external machining inserts for internal machining inserts for external machining 16er type 16ir type 16er type shim ye3-2n/ye3-3n shim yi3-2n/yi3-3n shim ye3-2n/ye3-3n ■ threading method and angle of insert right threading insert shim ≒ lead angle (e) shim angle standard tilting angle of holder (1.5° ) left threading ≒ negative lead angle (e) insert shim angle shim standard tilting angle of holder (1.5° ) f67