Обший каталог Yamawa 2016 - 2017 - страница 718

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FlowcMha8r加t :工Mフ8ロtaーpping Boring before tapping Check 1 Engagement ratio on cutting taps PD Engagement ratio on roll taps PD Internal threads Min 100% Min Max 80.4% 100% TMap2s Internal threads Internal threads TMap3s Min Max Max Length of 7840.14% Length of engagement engagement=12.1mm On "middle" engagement class, 7H class can be chosen Internal threads made by roll taps are TMap4s in case of "L" engagement length. Engagement Internal threads different from those made by cutting Symbol classification Middle Coarse Unit : mm taps on the shape of minor dimameter. Fine Engagement d=8.0mm Unit : mm Engagement length External threads D1 *Hole size for thread forming taps length classification Drill size Min Max (ref.) TMap5s S Short engagement length 4H 5H S 4(mm) Min Max Bored hole size 6.8 6.647 6.912 M Normal engagement length 5H 6H 7H 4 M 12(mm) 7.36 7.49 Engagement ratio L Long engagement length 6H 7H 8H 12 L(mm) 88.7% 100% 80.4% Forming condition changes depending P=1.25mm D1 is minor diameter of JIS 6H(2nd Class) of internal threads on workpiece's Material and shape. Above is for customer's reference. TMap6s Tolerance area of tap's pitch diameter TMap8s 【Pitch diameter】 Thread class of cutting taps Diameter of imaginary cylinder or cone Iinternal threads Class PD tolerance Check 2Check 2 which makes equal the width of threads ISO2 38μm〜63μm MTa1p0s and width of space between the threads ISO2X 63μm〜88μm ISO2 *Above shows the plus tolerance ISO2X by setting PD basic size as "0". MTa1p2s Width of threads Thread class of roll taps Width of space Class PD tolerance M1T-Map7s between threads ISO2X 102μm〜114μm Threading Pitch ISO3X 114μm〜127μm diameter ISO2X *Above shows the plus tolerance M9-MTa2p4s ISO3X by setting PD basic size as "0". Basic size of pitch diameter M25-MTa4p8s -200μm -150μm -100μm -50μm 7.188mm +50μm +100μm +150μm +200μm For tUhnrTeifaaiedpdss 6g ISO2X ISO3X ← Roll taps Tolerance of dies is the ISO2 ← Cutting taps target of external threads ISO2X For WhtihtTwreaoaprdthss Class of dies 6g Solid dies 6g external threads(-146〜-28) 6H internal threads(0〜160) NR GR GP NP For Pipe tThraepadss Relative position of PD tolerance area of external threads, internal threads, taps and gages. For Pg thTreaapdss ( ) ← Basic size of pitch diameter → (+) 7.188mm Unit : m Unit : m Check 3 Ring gage pitch diameter (for external threads inspection) Plug gage pitch diameter (for internal threads inspection) Gage check NR6g -160 〜 -146 GR6g -37 〜 -23 GP6H 7 〜 17 NP6H 160 〜 170 NR : NOT GO ring gage GP : GO plug gage GR : GO ring gage NP : NOT GO plug gage Unit : mm Unit : mm Accuracy of external threads Accuracy of internal threads Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter 6g 7.760〜7.972 7.042〜7.160 − 6H − 7.188〜7.348 6.647〜6.912 Sizes-17 714 Codes shown in ( ) are available while supplies last.