Общий каталог Yamawa 2022 - 2023 - страница 967

Flowchart : M2 tapping PD PD Boring before tapping Engagement ratio on cutting taps Check 1 Engagement ratio on roll taps Min Internal threads Min 100% 100% Max 74.1% Internal threads M2 Internal threads Ta ps M3 Min Max Ta ps Max Length of engagement=3.1mm 74.1% 【Length of engagement】 On "middle" engagement class, 7H class can be chosen Internal threads made by roll taps are M4 in case of "L" engagement length. different from those made by cutting Ta Internal threads ps Engagement taps on the shape of minor dimameter. Unit : mm Symbol Middle classification Coarse Engagement D1 Unit : mm Fine d=2.0mm Engagement length External threads Drill size Min *Hole size for thread forming taps length classification (ref.) Max M5 S Short engagement length 4H 5H − S≦1（mm） Min Max Ta M Normal engagement length 5H 6H 7H 1＜M≦3（mm） Bored hole size 1.6 1.567 1.679 1.79 1.84 ps L Long engagement length 6H 7H 8H 3＜L（mm） Engagement ratio 92.4% 100% 74.1% Forming condition changes depending P=0.4mm D1 is minor diameter of JIS 6H(2nd Class) of internal threads on workpiece's Material and shape. Above is for customer's reference. M6 Ta ps Tolerance area of tap's pitch diameter 【Thread class of cutting taps】 M8 Class PD tolerance Ta ps 【Pitch diameter】 P1 10μｍ〜 25μｍ Diameter of imaginary cylinder or cone Internal threads P2 25μｍ〜 40μｍ Check 2 which makes equal the width of threads and width of space between the threads M1 Ta 0 P3 40μｍ〜 55μｍ ps P1 P4 55μｍ〜 70μｍ P2 P3 *Above shows the plus tolerance by setting PD basic size as "0". M1 Ta 2 Width of P4 ps threads 【Thread class of roll taps】 Width of space width Class PD tolerance M1 between threads Ta -M 8.5 G4 38μｍ〜 51μｍ ps Pitch Threading diameter G4 G5 51μｍ〜 64μｍ G5 G6 64μｍ〜 76μｍ M9 -M G6 Ta ps 24 *Above shows the plus tolerance by setting PD basic size as "0". Basic size of pitch diameter -150μm -100μm -50μm 1.740mm +50μm +100μm +150μm M2 Ta 5-M ps 48 Ⅱ G4 G5 G6 M5 P1 P1 P2 P3 P4 Ta 0-M1 ps 00 Tolerance of dies is the P2 target of external threads Fo Class of dies 6g external threads(-86〜-19) 6H internal threads(0〜90) rU thr nifie e Ta ads d NR GR GP NP Ⅱ Solid dies ps P1 Solid dies JIS 2Class external threads(-80〜-20) JIS 2Class intenal threads(0〜70) For P2 for Auto Lathe WR GR GP WP e W thr hitwo r Ta ads th ps Relative position of PD tolerance area of external threads, internal threads, taps and gages. For S crew on se threads w us Ta ing machi ed ps（ nes (–) ← Basic size of pitch diameter → (+) M）S 1.740mm For Unit : μm Unit : μm P Ta ipe th ps read Ring gage pitch diameter (for external threads inspection) Plug gage pitch diameter (for internal threads inspection) s Check 3 NR6g -96 〜 -86 GR6g -22 〜 -12 GP6H 2 〜 10 NP6H 90 〜 98 For A WRⅡ -80 〜 -72 GRⅡ -32 〜 -24 GPⅡ 4 〜 12 WPⅡ 62 〜 70 pip meric Gage check e a Ta thre n NR : NOT GO ring gage GR : GO ring gage GP : GO plug gage NP : NOT GO plug gage ps ads WR : NOT GO working ring gage WP : NOT GO working plug gage For Unit : mm Unit : mm M thr iniatu e Accuracy of external threads Accuracy of internal threads Ta ads re ps Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter 6g 1.886〜1.981 1.654〜1.721 − 6H − 1.740〜1.830 1.567〜1.679 JIS 2class 1.890〜1.980 1.660〜1.720 〜1.490 JIS 2class − 1.740〜1.810 1.567〜1.679 Sizes-3