Carbide coating types

Bestend millcoating for aluminum

Remove the starter bit from the drill. Now, insert the larger bit into the drill. Chuck it in tightly. Rotate the drill briefly to make sure that the bit is centered in the chuck.

Extended Reach Tool Holder Holds 1/8” (0.125”) diameter tools. 6 inches overall length. Extremely small 3/8” (0.375”) overall diameter.

End mill coatingsfor aluminum

Choose a bit with a diameter that matches the final hole size you plan to drill, then choose a starter bit with a diameter about half that size. For example, if you want a 1/4-inch diameter hole, choose a 1/8-inch starter bit. Just be cautious of using extremely thin bits, as they may break.

Once you become proficient, the half-sized hole may not be necessary. Just start the correctly-sized bit at close to 90 degrees until it digs in enough to catch as the angle is changed.

End millcoating for hardened steel

End mill coatingsChart

Drilling at an angle by hand sometimes comes up with home improvement projects. While it's usually best to drill at an angle with a pocket jig or a drill press, basic angled holes are possible with just a drill, a drill bit, and a lot of careful positioning.

Lee has over two decades of hands-on experience remodeling, fixing, and improving homes, and has been providing home improvement advice for years.

Pull the starter bit back from the horizontal hole. Move the drill to the desired angle and insert the bit back into the hole. Make sure that the bit is firmly seated in the hole—if it is too close to the edge, it will lose grip and dance away; if it is too deep, you will not be able to angle the drill.

With the correctly sized drill bit, enlarge the angled hole to its final size. Go as slow as possible, since high speeds may cause the bit to move away from the pilot hole.

With the starter bit, begin to drill a hole at 90 degrees to the face of the workpiece. Do not complete the hole. Stop the drill when the bit is about 1/16-inch to 1/8-inch into the material. The goal is to drill a hole just deep enough to hold the tip of the bit for the next step, in which you will change the angle of the hole.