OnlineShop

Leading types for hand- and machinetaps

An important parameter for the function and the application range of the tool is the lead type. Since the thread quality and last but not least the tool life are influenced by the lead type, its selection should be made carefully. In general, the following five standardized gate shapes are distinguished:

Lead Form A according to DIN 2197

  • straight flutes
  • for short through holes

Lead Form B according to DIN 2197

  • straight flutes with spiral point
  • for through holes in long chipping materials

Lead Form C according to DIN 2197

  • straight or spiral flutes
  • for blind and through holes

Lead Form D according to DIN 2197

  • straight or spiral flutes
  • for blind an through holes with long thread outlets

Lead Form E according to DIN 2197

  • straight or spiral flutes
  • for blind holes with short thread outlets