Общий каталог Yamawa 2022 - 2023 - страница 1172

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Technical Description of productsInformation 12. Guide to Threads Forming Taps (Roll Taps) ○Relation between tapping speed and tapping lubricant depending on work materials. Work Material Tapping Speed Tapping lubricant Die Cast Materials Not water soluble N1 type 4 issue Aluminum and Aluminum Alloy Not water soluble N3 type 8 issue Cold Drawn, Cold Forged, Cast Die Cast Materials Zinc and Zinc Alloy Cold Drawn, Cold Forged, Cast Copper Cold Forged, Cast Brass Cold Drawn, Cold Forged Mild Steel, Medium Carbon Steel, Stainless Steel Not water soluble N3 type 8 issue Steel Not water soluble N4 type 8 issue Free Cutting Steel, Soft Magnetic Iron Note : It is necessary to carefully select a suitable tapping speed taking into consideration : machining conditions, style of tap, number of tap chamfered threads, work piece design, material being tapped, hole condition and type of tapping fluid. ■YAMAWA G class system Thread Forming Taps ○YAMAWA G class system is made by using the datum 0.0005 inch (12.7μm) in a step form in accordance with ANSI standard GH class. ○The upper deviation of G class is decided by rounding off the grade No.× 12.7 to 1 decimal. ○The lower deviation of G class is specified in the same upper tolerance of one lower step. ○The tolerances are either 12 μm or 13μm. ■Comparison of pitch diameter tolerance zone between class 2 internal threads and recommended Roll Taps G Class. M1.4×0.3 M1.6×0.35 M1.7×0.35 JIS Class 2 M1.8×0.35 YAMAWA G Class Taps M2×0.4 M2.5×0.45 M2.6×0.45 M3×0.5 M3.5×0.6 M4×0.7 M5×0.8 M6×1 M8×1.25 M10×1.5 M12×1.75 Basic Pitch Dia. Tolerance area ■Roll taps for miniature threads, Accuracy GS class ○GS class is the accuracy class special for roll taps for miniature threads. ■Comparison table of PD tolerance of GS class of roll taps for miniature threads and 4H5 internal threads. 8 18 GS1 23 GS2 28 13 GS3 33 18 GS4 23 10 20 30 40 45 S0.6×0.15 GS2 4H5 internal threads S0.7×0.175 GS3 S0.8×0.2 GS class tapGS3 S0.9×0.225 GS4 Basic pitch diameter Tolerance area (＋）μｍ Technical-21