Compressive strength 3000 to 6000 psi; drilling speed 50 to 100 rpm
A detachable, end cutting drilling tool with an internal thread or tapered socket at one end for attaching a rock drill rod. The opposite end is designed with two or more cutting edges for drilling into rock formation by impact and a slight rotary motion. It contains a hole or holes in the cutting for the purpose of conducting air or water to clear the hole being drilled. It is used with powered drifter drills, sinker drills, and the like.
Classification: Boring or sinking machinery, nesoi
NSN 5960-00-928-8365
NSN 6240-01-506-3911
NSN 5920-01-374-9175
NSN 5925-01-378-6857
NSN 5985-01-215-2210
NSN 5998-01-424-0606
NSN 5920-01-274-1279
NSN 5950-00-570-0352
NSN 5915-01-184-0397
NSN 6620-01-414-4578
NSN 5910-01-587-1303
NSN 6620-01-622-4980