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 5910-00-012-1578
NSN 4140-00-962-6799
NSN 6645-01-250-0478
NSN 4140-01-305-6934
NSN 5965-00-527-8818
NSN 2925-00-992-5860
NSN 5905-00-040-1760
NSN 6105-00-389-7994
NSN 5910-01-431-3686
NSN 5996-01-568-4832
NSN 6220-01-117-7619
NSN 5965-00-840-8849