Обший каталог Yamawa 2016 - 2017 - страница 796

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12. Guide to Threads Forming Taps (Roll Taps) Description of products Relation between tapping speed and tapping lubricant depending on work materials. Work Material Tapping Speed Tapping lubricant Aluminum and Aluminum Alloy Die Cast Materials Insoluble oil Cold Drawn, Cold Forged, Cast Zinc and Zinc Alloy Die Cast Materials Cold Drawn, Cold Forged, Cast Copper Cold Forged, Cast Brass Cold Drawn, Cold Forged Steel Mild Steel, Medium Carbon Steel, Stainless Steel 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. Accuracy of roll taps ■Comparison of pitch diameter tolerance zone between ISO6H internal threads and recommended Roll Taps Sizes Basic Pitch Dia. (+)μm M 1.4 0.3 ISO 2X ISO 3X M 1.6 0.35 ISO 2X ISO 3X Tap class for 6H ISO2X M 1.8 0.35 ISO 2X ISO 3X Tap class for 6G ISO3X M 2 0.4 ISO 2X ISO 3X Internal threads 6H M 2.2 0.45 ISO 2X ISO 3X M 2.5 0.45 ISO 2X ISO 3X M 3 0.5 ISO 2X ISO 3X M 3.5 0.6 ISO 2X ISO 3X M 4 0.7 ISO 2X ISO 3X M 5 0.8 ISO 2X ISO 3X M 6 1 ISO 2X ISO 3X M 8 1.25 ISO 2X ISO 3X M 10 1.5 ISO 2X ISO 3X M 12 1.75 ISO 2X ISO 3X ■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 S0.7×0.175 4H5 internal threads GS3 Technical Information S0.8×0.2 GS3 GS class tap S0.9×0.225 GS4 Basic pitch diameter Tolerance area (+)μm Technical-21 792