Tapered drill equipment also provides a hexagonal chuck section
to provide leverage for the rotation chuck bushing, which usually
also has a forged collar to maintain the proper shank striking
face position in the rock drill, and match a tapered bit at the
socket end, Holes are typically drilled in 0.6m increments to
accommodate the air-leg feed length. With higher penetration,
straighter holes, longer service life and lower cost per meter
drilled than integral steel, tapered drill equipment is grabbing
market share from integral drill steel, especially in mining
applications and the dimensional stone industry.