Abstract: A removable head assembly for a combination rotary, including: a body; a rotatable element connected to the body and including an indentation or protrusion for fixing a pad assembly to the rotatable element; and a locking assembly including first and second elements. The body is connectable to a combination rotary tool and is rotatable about a first axis; the rotatable element is rotatable about a second axis; the indentation or protrusion is aligned with a third axis substantially parallel to the second axis; and the first element is displaceable to displace the second element to rotationally fix the rotatable element with respect to the body so that the first and third axes are co-linear, and the second axis is out of alignment with the first and third axes.

Abstract: A fastener (20) is adapted to be mounted in a hole provided on a wall (W). The fastener broadly includes an elongated tubular body (21) having a first end (23) and a second end (24), having an outwardly-extending flange (25) adjacent the first end, having an intermediate portion (26), and having a plurality of circularly-shaped longitudinally-extending cantilevered tangs (28, 28, 28, 28) extending from the intermediate portion to the second end. A nut (22) is adapted to be positioned within the cantilevered portions. The nut has an outer polygonal surface (36) and has an internally-threaded through-bore (39). The distal ends of the tangs are plastically deformed or in-turned about the nut to hold the nut within the body.

Abstract: A cutting machine having guides and comprising a crosshead with bearings wherein the bearings are used for guiding the crosshead as it reciprocates between the guides without the use of added lubricants. The bearings comprise ball bearings or bearing inserts. A body comprising a first member defining first member pin holes and a second member defining second member pin holes, and a connecting member used for connecting the first member to the second member, the first member and second member defining ball bearing recesses therebetween. Ball bearings received in each of the ball bearing recesses with the pins positioned through the first pin holes and second pin holes and used for securing the ball bearings in the ball bearing recesses. The ball bearings used for rolling over the guides. In another embodiment the crosshead comprises a body having sides and defining bearing component recesses in the sides. A pair of guides each having inwardly sloping walls that meet define V-shaped recesses.