Countersunk Hole Sheet Metal

Improper countersink through hole sizes.

Countersunk hole sheet metal.

In this video i go over punching countersunk holes in sheet metal with a unipunch. There is another production method that can be employed which is to form the countersink shape in a cnc punch press or fly press. Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. This month we will discuss another common issues that we encounter on sheet metal part prints.

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. 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. 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. Sheet metal fabrications often need to have countersunk holes ready to take countersunk screws when being screwed together.

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. We offer 3 different styles of countersinking which is shown below. By just tightening the rapid load holder sold separately into your drill or drill driver you can quickly insert or eject hex shank drill bits and screw driving tips as necessary. 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.

Countersinking is commonly used for holes that need to accept a flat head screw or fastener. These countersinks have always been drilled in with standard pillar drills or counter bits. Depending on part configuration material type and thickness countersink size etc we can employ two methods of adding countersinks to parts. Many of the parts we produce include countersinking.

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. No c sink needed no metal removed from the sheet metal and more strength at the area of the screw head.