Countersunk Hole Sheet Metal

In this video i go over punching countersunk holes in sheet metal with a unipunch.

Countersunk hole sheet metal.

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. Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. Countersinking is commonly used for holes that need to accept a flat head screw or fastener. 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.

Many of the parts we produce include countersinking. These countersinks have always been drilled in with standard pillar drills or counter bits. Improper countersink through hole sizes. 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.

Note that no metal was removed to create the countersunk hole other than the hole itself. 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. Sheet metal fabrications often need to have countersunk holes ready to take countersunk screws when being screwed together. 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. 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. There is another production method that can be employed which is to form the countersink shape in a cnc punch press or fly press. We offer 3 different styles of countersinking which is shown below.

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