Обший каталог Yamawa 2016 - 2017 - страница 830

20. Carbide Taps

■Toughness and Hardness of Cemented Carbide and HSS ■Chamfer wear and number of holes of Carbide taps and HSS taps

Deflective Strength (MPa) (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

HSS taps Carbide taps

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 Aluminum alloy die casting

Material Plastic with glass fibre 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 Note : In all situations, HSS taps being used are standard oues. Carbide taps, when used properly, bring out a long tool life. These datum have come from end users of carbide taps.