Annular Hole HSS Broach Bit

One way to avoid ripples and burrs when drilling holes in pipes and tubing is to use annular cutters. Since annular cutters are hollow inside, there is no dead zone resistance to overcome.

Using a twist drill to drill holes in pipes or tubing can raise concerns about hole roundness, location accuracy, hole finish, chip extraction, burr and drilling duration.

The focal point of these concerns is the most notable feature of the twist drill; its point. This is not actually a point, but the tangent line where two cutting angles intersect in the drill bore, or the so-called "dead zone." This dead zone causes the surface speed of the cutting edges to drop to zero.

Lower surface speed reduces cutting efficiency and requires greater thrust, or feed pressure, for the cutting edges to push the material.

Compared to traditional tools (twist drills, etc.), annular cutters can multiply your cutting speed by up to 3 times, while providing longer tool life, more accurate hole making, better finishing and no burrs. The cutting edges distribute the cutting load evenly, making cutting faster.

Annular cutters convert a smaller area into chips, requiring less power and thrust. This feature provides longer tool life and less vibration. The slug also offers a higher scrap value than loose chips and shavings.

Specifications

• Perfect stable start
• Internal conical surface
• Precise center pilot fit
• Ground clamp surface
• Faster, because each tooth cuts
• More accurate
• Greater drilling depth
• Stronger, therefore less fragile
• Guaranteed slug ejection