Abstract: A rotary cutting tool with enhanced bump-off capability is disclosed. The cutting tool includes a tool shank having a pocket. A replaceable cutting head is at least partially disposed within the pocket of the tool shank with an interference fit. A coupling pin assembly is at least partially received within a bore of the tool shank. The coupling pin assembly comprises a sleeve member and a coupling pin at least partially disposed within the sleeve member. The sleeve member includes an upper portion and a lower portion having a non-circular cross-sectional shape with a bump-off surface. An actuation screw contacts the coupling pin assembly and causes the replaceable cutting head to move relative to the tool shank. The bump-off surface of the lower portion of the sleeve member extends radially outward with respect to the coupling pin by a distance, D, thereby providing enhanced bump-off capability.

Abstract: A rotary cutting tool with enhanced bump-off capability is disclosed. The cutting tool includes a tool shank having a pocket. A replaceable cutting head is at least partially disposed within the pocket of the tool shank with an interference fit. A coupling pin assembly is at least partially received within a bore of the tool shank. The coupling pin assembly comprises a sleeve member and a coupling pin at least partially disposed within the sleeve member. The sleeve member includes an upper portion and a lower portion having a non-circular cross-sectional shape with a bump-off surface. An actuation screw contacts the coupling pin assembly and causes the replaceable cutting head to move relative to the tool shank. The bump-off surface of the lower portion of the sleeve member extends radially outward with respect to the coupling pin by a distance, D, thereby providing enhanced bump-off capability.

Abstract: A modular drill apparatus (100) includes: a shank (110) having a pocket (112); a cylindrical post (117) centrally secured within a bottom (114) of the pocket (112); a cutting tip (130) including a lower portion (131) including a central bore (136) which receives the cylindrical post (117), an upper portion (132) and a channel (134) therebetween; and an insert assembly (150) interfitted within and supported by the channel (134), the insert assembly (150) being expandable along a length thereof for securing the cutting tip (130) to the shank (110) within the pocket (112) by providing an interference fit and retractable along the length thereof for releasing the cutting tip (130) from the pocket (112) by overcoming the interference fit.

Abstract: A rotary cutting tool with enhanced bump-off capability is disclosed. The cutting tool includes a tool shank having a pocket. A replaceable cutting head is at least partially disposed within the pocket of the tool shank with an interference fit. A coupling pin assembly is at least partially received within a bore of the tool shank. The coupling pin assembly comprises a sleeve member and a coupling pin at least partially disposed within the sleeve member. The sleeve member includes an upper portion and a lower portion having a non-circular cross-sectional shape with a bump-off surface. An actuation screw contacts the coupling pin assembly and causes the replaceable cutting head to move relative to the tool shank. The bump-off surface of the lower portion of the sleeve member extends radially outward with respect to the coupling pin by a distance, D, thereby providing enhanced bump-off capability.

Abstract: A rotary cutting tool includes a tool shank, a replaceable cutting head mounted on the tool shank, a coupling pin, and an actuation member. In one embodiment, the coupling pin has a cylindrical portion with a reduced-diameter portion defined by a pair of angled side walls separated by a bottom surface for cooperating with a non-threaded portion at one end of the actuation member. In another embodiment, the coupling pin has a cylindrical portion with a notch with a pair of side walls for cooperating with a frustoconical member at one end of the actuation member. When assembled, a pair of V-shaped contact surfaces on the cutting head engage a pair of oppositely facing V-shaped contact surfaces on the tool shank to provide stability against the momentum created by cutting forces in two different directions and securely hold the cutting head in place during machining operations.

Abstract: A rotary cutting tool includes a tool shank, a replaceable cutting head mounted on the tool shank, a coupling pin, and an actuation member. In one embodiment, the coupling pin has a cylindrical portion with a reduced-diameter portion defined by a pair of angled side walls separated by a bottom surface for cooperating with a non-threaded portion at one end of the actuation member. In another embodiment, the coupling pin has a cylindrical portion with a notch with a pair of side walls for cooperating with a frustoconical member at one end of the actuation member. When assembled, a pair of V-shaped contact surfaces on the cutting head engage a pair of oppositely facing V-shaped contact surfaces on the tool shank to provide stability against the momentum created by cutting forces in two different directions and securely hold the cutting head in place during machining operations.