Steel Tooth Bit
Definition - What does Steel Tooth Bit mean?
A steel tooth bit is a type of roller cone bit used to drill through rock with a minimum of damage to the bit. The bit has three cones mounted in a conical block. Each cone ends in a grinding wheel that resembles a cog wheel with sharpened teeth around its rim.
Bit selection is based on the density and hardness of the materials through which the bore is being drilled.
Trenchlesspedia explains Steel Tooth Bit
Steel tooth bits range in size from 2 ¼-inches to 36-inches in diameter. Steel tooth bits used to drill through soft rock formations, such as chalk or limestone, are longer, more slender and more widely separated than the teeth for hard rock formations, such as granite.
Many manufacturers create the grinding wheels and teeth using precision computer numerical controlled milling processes. Steel tooth bit are also known as milled bits, even when a manufacturer used a forging process to create the cutting wheels.