Обший каталог Yamawa 2016 - 2017 - страница 796

12. Guide to Threads Forming Taps (Roll Taps)

<Condition of use>

Relation between tapping speed and tapping lubricant depending on work materials. Tapping Speed Work Material Tapping lubricant Die Cast Materials Insoluble oil Aluminum and Aluminum Alloy 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 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

■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 tap GS3 S0.9×0.225 GS4

Basic pitch diameter Tolerance area

(+)μm