Общий каталог Widia 2017 - страница 608

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TopThread™ Catalogue Numbering System TopThread Insert Identification System NDC38RDR75 N D C 3 8RD R 75 Type Insert Additional Insert Industry Thread Hand Definition Additional of Insert Information Size Identification of Insert of Insert Information N — TopThread™ B — Buttress Indicates API or R — Right Hand drilling industry form designation F — Fine pitch (e.g., 10RD, L — Left Hand 8RD, .038) S — Stub Acme or controlled root radius threading C — Cresting inserts indicate the root radius in 0,025 P — Positive rake increments (NJ,NJF, NJP, NJK) or K — Fine pitch, positive M indicates metric ISO thread • Threads per inch or pitch (for metric) T • “A” or “B” type Buttress insert • Taper per foot — API threads A — Acme TopThread insert dimensions D — API or NPT A T J — UNJ thread insert size mm mm I — Internal thread 1 2,54 2,54 T — 60° V thread 2 5,56 3,81 E — External thread (used only if internal and external thread 3 8,74 4,95 forms are different) W — 55° V Whitworth 4 11,51 6,48 M — Multiple tooth 5 17,48 9,65 6 11,51 9,73 K — Standard chip control 8 7,93 11,13 C — Coarse pitch NJF NDC-V-M NTC D — Dryseal NA NT NT-K F10 widia.com