Compressive strength 9000 to 12000 psi; drilling speeds 40 to 80 rpms; gage type a tooth
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 6685-01-550-7126
NSN 6145-01-220-7398
NSN 5915-00-434-1682
NSN 5975-01-058-6672
NSN 6650-00-938-9233
NSN 6320-01-162-5977
NSN 6130-00-725-0066
NSN 6645-01-605-1485
NSN 6320-01-473-9024
NSN 6645-01-536-6111
NSN 5920-01-362-3866
NSN 5905-01-546-6241