Widia GTD

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


EX-HPC Extreme High-Performance Solid Carbide Taps for Through Hole Tapping




  • runs 5 times faster, lasts 4 times longer than conventional taps
  • enhanced tap precision and design for superior accuracy of product thread
  • fully cylindrical shanks for use with hydraulic or shrink-fit holders for optimal performance
  • may also be used with Tremendous Grip High Precision (TGHP) collet holders
  • common fractional or metric tap shank sizes that match solid carbide tap drill shanks (DIN 6535)
  • tap runout less than 10 microns (0.0004²) for superior thread quality and excellent tap performance
  • newly designed cutting edges modified by a patented process to resist chipping
  • patented PVD nanolayer TiAlN/TiN coated carbide grade for highest edge strength and wear resistance (other patents pending)
  • available with straight flutes or left hand spiral flutes (right hand thread)
  • left hand spiral flute taps designed for maximum chip control and free cutting in through holes
  • engineered custom solutions available upon request
  • through coolant hole, semi-bottoming chamfer, straight flute design for blind holes available on request
  • after use, can be factory reconditioned to original patented specifications and tolerances


Application Information

  • may be used at 4-5 times the tapping speed of HSS taps and still obtain 4 times life
  • designed for use on CNC machines with synchronous or rigid tapping control and precision tool holders
  • low-carbon steel
  • free-machining steel
  • medium and high plain carbon, alloy, and tool steels
  • ferritic, martensitic, and PH stainless steels (not recommended for austenitic 303, 304, 316 SS)
  • ductile (nodular) and malleable cast irons
  • gray cast iron
  • use straight fluted taps for sizes M16 and larger and for ductile and cast iron and for materials producing broken chips
  • use on high-speed drilling/tapping machines and machining and turning centers that are equipped with rigid hydraulic, shrink-fit, or TGHP precision collet tool holders