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 6135-01-027-7543
NSN 6685-01-399-8584
NSN 6240-00-097-8505
NSN 4140-01-047-4093
NSN 5895-01-413-6364
NSN 6150-00-113-5249
NSN 5915-01-057-9688
NSN 5999-01-429-5297
NSN 7035-00-238-3662
NSN 6130-01-352-6112
NSN 4140-01-340-2579
NSN 5930-00-227-3929