20. Carbide Taps Description of products ■Toughness and Hardness of Cemented Carbide and HSS ■Chamfer wear and number of holes of Carbide taps and HSS taps (MPa) Deflective Strength (HRA) Hardness Cutting Condition Tap : M5×0.8P4 Chamfer : 3 pitches Machine : Machine with multi spindles Hole Size : 4.2mm Thread Length : 10mm Through Fluid : water soluble Workpiece : GG-25 Indicator drop chamfer wear HSS taps Deflective Strength Carbide taps Hardness P50 UF A UF B SKH51 SKH58 (SKH9) (AISI M7) Number of holes Cemented Carbide HSS ■Carbide Tap examples and comparison of tool life Size M2×0.4 M8×1.25 M6×1 M8×1.25 M10×1.25 Classification Material Plastic with glass fibre Aluminum alloy die casting GG-25 GG-25 GG-25 (Si = 12%) Workpiece Part's name Electric Parts Car Parts Electric Parts Car Parts Car Parts Tapping Hole. 1.6 Through 6.7 Blind 5.0 Blind 6.7 Blind 8.7 Blind Thread condition Condition Tapping Length 4mm 18mm 10mm 16mm 18mm Machine Special Machine Special Machine 4 spindle Machine Multi Spindle Machine Special Machine Condition Cutting Speed 6.3m/min 8.5m/min 8m/min 6m/min 5.7m/min of Use Fluid Dry Water soluble Water soluble Water soluble Water soluble Carbide Tap 10.000 75.400 53.000 18.860 38.500 Number HSS Tap 200 1.000 1.000 300 500 of Holes Comparison 50 75.4 53 62.9 77 of Life Information Note : In all situations, HSS taps being used are standard oues. Technical Carbide taps, when used properly, bring out a long tool life. These datum have come from end users of carbide taps. Technical-55 826