US 11,883,888 B2
Modular drill with enhanced bump-off capability
Ruy Frota de Souza Filho, Latrobe, PA (US); Marcelo Euripedes Silva, Piracicabo (BR); and Nicholas J. Henry, Greensburg, PA (US)
Assigned to KENNAMETAL INC., Latrobe, PA (US)
Filed by Kennametal Inc., Latrobe, PA (US)
Filed on Jun. 28, 2021, as Appl. No. 17/359,977.
Prior Publication US 2022/0410285 A1, Dec. 29, 2022
Int. Cl. B23B 51/02 (2006.01)
CPC B23B 51/02 (2013.01) [B23B 2231/0204 (2013.01); B23B 2251/02 (2013.01); B23B 2251/082 (2013.01); B23B 2251/408 (2013.01); B23B 2251/50 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rotary cutting tool with enhanced bump-off capability, comprising:
a tool shank having a pocket;
a replaceable cutting head at least partially disposed within the pocket of the tool shank with an interference fit;
a coupling pin assembly at least partially received within a bore of the tool shank, the coupling pin assembly comprising a sleeve member and a coupling pin at least partially disposed within the sleeve member, the sleeve member including an upper portion and a lower portion extending radially outward with respect to the upper portion and having a non-circular cross-sectional shape with a bump-off surface, the coupling pin including an upper portion and a lower portion configured to make partial contact with the bore of the tool shank; and
an actuation screw for contacting the coupling pin assembly and causing the replaceable cutting head to move relative to the tool shank,
wherein 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, and contacts the actuation screw when moving the replaceable cutting insert from a clamped position to a bump-off position, thereby providing enhanced bump-off capability.