Countersunk Hole Sheet Metal

We offer 3 different styles of countersinking which is shown below.

Countersunk hole sheet metal.

Note that no metal was removed to create the countersunk hole other than the hole itself. There is another production method that can be employed which is to form the countersink shape in a cnc punch press or fly press. In this video i go over punching countersunk holes in sheet metal with a unipunch. These countersinks have always been drilled in with standard pillar drills or counter bits.

Creating a countersink in the metal allows the head of the screw to rest below the surface of the metal and provides the full structural strength of the screw. After drilling a hole in the table for the screw you will be using and the matching hole in the sheet metal use this punch to make a depression in the sheet metal so the screw head sits below the surface of the sheet metal. Depending on part configuration material type and thickness countersink size etc we can employ two methods of adding countersinks to parts. Countersunk holes made with a large number of flutes and cutting edges to lightly shear off material these tools repair and clean out holes for machining between centers.

Machined countersinks are created with a drill press and formed countersinks are made with punch press tooling the best option depends on your project and part geometry. Countersinking is commonly used for holes that need to accept a flat head screw or fastener. Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. When placing an order or requesting a quote please specify the required dimensions based on the diagrams shown on the right side of the picture for each style.

Get a fast and efficient way to switch get a fast and efficient way to switch from screw driving to hole drilling and back with the dewalt steel countersink set. Improper countersink through hole sizes. A countersink screw has a taper that is largest at the head and reduces in size until it reaches the threaded shaft of the screw. These were created with a dimple die punch which could create a countersunk hole through multiple sheets of aluminum.

Many of the parts we produce include countersinking. No c sink needed no metal removed from the sheet metal and more strength at the area of the screw head.