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TECHNICAL GUIDE

PUNCHING TOOLS

5) COUNTERSINK BURRING

TECHNICAL GUIDE

FORMING TOOLS

5) COUNTERSINK BURRING

COUNTERSINK BURRING

OUTLINE OF FORMING

FORMING UP
FORMING DOWN

Forming process for making tube of threading for screw, and at the same time make a chamfer in the entrance part.

Used for threading for screw. Used to guide at the time of tapping.

TOOLING STRUCTURE (NC 1-1/4)

NOTE

  • 1)Please indicate the dimension of A, B and angle(C),
    when you order.
  • 2) If the gap appear between chamfered plate and burring plates,
    when joined by a countersunk screw, please use the countersink burring.
    Standard tap burring
    Countersink burring

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