Moly drill bits work well with mild steel. Cobalt bits are expensive and best choice for the abuse common in farm shops, but…drill bits by definition are “consumable items.” The differences ...

steer away from this option as carbon steel though strong, tend to heat up too fast. Countersink drill bit sets made of cobalt are extremely strong and durable. They are basically composed of ...

Description: Set Content: 1/16" - 1/2" x 65ths, Jobber length 135° split point Grade: M35 Steel Spec. DIN1412-ANSI Standard-N Includes: Metal Case * Meets A.N.S.I. standards ...

It turns out that a hot solution of alum (ammonium aluminum sulfate), which is available in the spice rack of your local supermarket, will dissolve the steel drill bit without reacting with the brass.

Common materials of construction include high-speed steel, cobalt, carbide, and diamond PCD. Drill bits may be coated to assist in cutting lubricity and/or add abrasion resistance for longer tool life ...

whereas cobalt is typically used for harder materials like cast iron or stainless steel. Tungsten-carbide tipped (TCT) and ...

Metal: If you’re drilling through metal, high-speed steel (HSS) bits or cobalt bits will give you the durability and cutting power you need. Concrete or Brick: Masonry bits should be your go-to ...

There are a number of different types of drill bits. Steel Tooth Rotary Bits are the most common types of drill bits, while Insert Bits are steel tooth bit with tungsten carbide inserts.

So it’s always a joy to pick up a new trick, especially one as simple as putting a hardened edge on mild steel using a drill bit as a filler rod. This tip comes to us by way of [Jody], aka ...