Widia GTD

Widia GTD (formerly Greenfield) EX-HPC Solid Carbide Taps

 

  Straight Flute
Plug Chamfer Taps
Recommended
For Right Hand Threads Left Hand Spiral Fluted Plug Chamfer Taps Recommended
Workpiece Material Group Examples Hardness SFM m/min SFM m/min
low carbon steel (<0.25% C) 1018 <220 HB 300-400 100-130
free machining steel 12L14 <275 HB 250-350 80-120
medium and high plain-carbon, alloy, and tool steels 1040, 4340, H13, D2 <320 HB
<32 HRC
200-300 70-100
ferritic, martensitic, and
PH stainless steels
430, 410, 17-4PH <320 HB
<32 HRC
150-210 50-70
ductile (nodular) and
malleable cast irons
A47, A536 <300 HB 250-400 80-130 250-400 80-130
gray cast iron Class 20-50 <300 HB 250-400 80-130