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A countersink in sheet metal to put bolt head under surface
Choose type A or type B as bolt head
Need punch correct hole before countersink forming. Advised 0.2mm of bolt sinking
Formdown type is popular. Replacable insert type is optional.
Thick turret countersink tooling is a specialized forming tool used in CNC turret punch presses.
1.Its primary purpose is to create the conical recess (the "countersink") needed to seat flat-head screws or rivets flush with the surface of the sheet metal.
2.The key benefit is the elimination of a secondary operation like drilling or deburring, allowing the part to be completed entirely within the punch press, which significantly boosts efficiency.
3.Core FeaturesForming, Not Cutting: Unlike a standard punch, a countersink tool displaces the material rather than removing a slug.
4.The conical shape is created by pressing the sheet metal down into a matching die shape.
5.Pilot Punch and Form Ring: The tool typically operates in two stages within a single stroke:Pre-Piercing/Pilot: A preliminary hole must exist or be punched immediately before the countersink tool is used.Forming: The punch tip, which has the desired countersink angle (e.g., 82°or 90°), descends and presses the material around the pre-pierced hole into the die cavity, forming the recess.
Key Applications
The primary driver for using thick turret countersink tooling is to achieve flush fastening while consolidating manufacturing steps.
Electronic Enclosures and Cabinets: Used extensively for access panels and chassis where the outer surface must be perfectly
smooth to allow mating parts to fit closely or for aesthetic reasons.
Appliance and Commercial Equipment: Components for refrigerators, ovens, HVAC systems, and vending machines that
require flat surfaces for proper assembly and appearance.Vehicle and Transportation Components:
Parts where exposed fasteners are required to be flush to reduce aerodynamic drag or for safety/snag avoidance.
Any Application Requiring Secondary Operations Elimination: The most compelling application is in high-volume production runs
where removing drilling, tapping, or grinding processes from the workflow provides immense time and cost savings.
This single-stroke approach streamlines the entire fabrication sequence.Mounting Points: Creating precise recesses for
flat-head screws that need to be completely flush with the sheet metal surface for internal components to be mounted flatly on top.
