Patent ID: 8371397

Claim:
A cartridge feed screw nut for engaging a feed screw of a drilling system, the drilling system comprising a drill having a drifter cylinder and a front cylinder washer secured to the drifter cylinder, the front cylinder washer defining a recess, the cartridge feed screw nut comprising: a body having a tubular threaded opening defined therein, the tubular threaded opening having a longitudinal axis and being adapted to directly threadingly engage the feed screw, the body also having side portions including: a plurality of lateral surfaces including a first lateral surface and a second lateral surface, a plurality of end surfaces, wherein the lateral surfaces and the end surfaces form a profile of the body, the profile being shaped for complementary receipt within the recess of the front cylinder washer, wherein, following receipt of the cartridge feed screw nut within the recess of the front cylinder washer, the profile of the body is configured to prevent rotation of the cartridge feed screw nut relative to the front cylinder washer through engagement between at least one of the lateral surfaces or the end surfaces of the body and the front cylinder washer; and a pin hole extending through the body from the first lateral surface to the second lateral surface, the pin hole being spaced from the tubular threaded opening of the body and being generally transverse to the longitudinal axis of the tubular threaded opening of the body, the pin hole being adapted to receive a locking pin such that the cartridge feed screw nut is secured in place relative to the front cylinder washer.