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TECHNICAL GUIDE

PUNCHING TOOLS

3) COUNTERSINK FOR COUNTERSUNK SCREW (CHAMFERING)

TECHNICAL GUIDE

FORMING TOOLS

3) COUNTERSINK FOR COUNTERSUNK SCREW (CHAMFERING)

COUNTERSINK FOR COUNTERSUNK SCREW (CHAMFERING)

OUTLINE OF FORMING

FORMING UP
FORMING DOWN

Forming process of making a chamfer to material.

Used for sink a countersunk screw head, make chamfer to a corner after punching, guide of tapping.

TOOLING STRUCTURE (NC 1-1/4)

NOTE

  • 1） The shape of the chamfer.
    (TYPE 1) Chamfer with a straight section. (See Fig. 1)
    (TYPE 2) Chamfer without a straight section. (See Fig. 2)
    The Appearance of TYPE 1 is better than TYPE 2 when put a countersunk screw. TYPE 1 is the standard of CONIC.
    Fig.1 TYPE 1
    Fig.2 TYPE 2
  • 2） Chamfering all from top to bottom of material can not be produced, because contact with the punch and die.
    Straight section is required like Fig.4.
    Fig.3 Chamfering that can be formed by the press.
    Fig.4 Chamfering that can not be formed by the press.
  • 3）Standard countersunk screw head diameter is twice of the screw size. But some screw head diameter is smaller than the standard. So, be careful when you order.
  • 4）If a large amount of chamfer, Raised around the chamfered.
    In that case, it can be reduced by increasing the pre-hole diameter

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3) COUNTERSINK FOR COUNTERSUNK SCREW (CHAMFERING)(644KB)

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