Общий каталог Yamawa 2022 - 2023 - страница 999

Flowchart : M12 tapping PD PD Check 1 Boring before tapping Engagement ratio on cutting taps Engagement ratio on roll taps Min Internal threads Min 100% 100% Max 82.3% Internal threads M2 Internal threads Ta ps M3 Min Max Ta ps Max Length of engagement=18.1mm 82.3% 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 taps on the shape of minor dimameter. ps Engagement Unit : mm Symbol Middle Coarse classification d=12.0mm Engagement D1 Fine Unit : mm Engagement length External threads length classification Drill size Min Max *Hole size for thread forming taps (ref.) M5 S Short engagement length 4H 5H − S≦6（mm） Min Max Ta M Normal engagement length 5H 6H 7H 6＜M≦18（mm） Bored hole size 10.3 10.106 10.441 11.09 11.23 ps L Long engagement length 6H 7H 8H 18＜L（mm） Engagement ratio 89.7% 100% 82.3% Forming condition changes depending P=1.75mm 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】 P2 20μｍ〜40μｍ Diameter of imaginary cylinder or cone Internal threads which makes equal the width of threads P3 40μｍ〜60μｍ Check 2 and width of space between the threads M1 0 P4 60μｍ〜80μｍ Ta ps P2 P3 P5 80μｍ〜100μｍ P4 *Above shows the plus tolerance M1 Width of P5 by setting PD basic size as "0". Ta 2 ps threads 【Thread class of roll taps】 Width of space Class PD tolerance M1 between threads Ta -M Pitch G8 89μｍ〜102μｍ ps 8.5 Threading diameter G9 102μｍ〜114μｍ G8 *Above shows the plus tolerance M9 G9 by setting PD basic size as "0". Ta -M ps 24 Basic size of pitch diameter -200μm -150μm -100μm -50μm 10.863mm +50μm +100μm +150μm +200μm M2 Ta 5-M ps 48 Ⅱ G8 G9 P1 M5 Ta 0-M1 P2 P3 P4 P5 ps 00 Tolerance of dies is the P2 target of external threads Fo Class of dies 6g external threads(-184〜-34) 6H internal threads(0〜200) rU thr nifie e NR GR GP NP Ta ads d Ⅱ Solid dies ps P1 Solid dies JIS 2Class external threads(-180〜-50) JIS 2Class intenal threads(0〜160) For P2 for Auto Lathe WR GR GP WP W thr hitwo e rth Ta ads 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 mach ed (–) ← Basic size of pitch diameter → (+) ps（ ines SM ） 10.863mm Unit : μm Unit : μm For P Ta ipe thr Ring gage pitch diameter(for external threads inspection) Plug gage pitch diameter(for internal threads inspection) ps ead s Check 3 NR6g -202 〜-184 GR6g -51 〜-33 GP6H 7 〜 17 NP6H 200 〜 210 For WRⅡ -180 〜-172 GRⅡ -62 〜-54 GPⅡ 4 〜 12 WPⅡ 152 〜 160 A 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 e ps r Major diameter Pitch diameter Minor diameter Major diameter Pitch diameter Minor diameter 6g 11.701〜11.966 10.679〜10.829 − 6H − 10.863〜11.063 10.106〜10.441 JIS 2class 11.760〜11.950 10.683〜10.813 〜9.803 JIS 2class − 10.863〜11.023 10.106〜10.441 Sizes-35