Self-Propelled Rotary Tool
Self-propelled rotary tool (SPRT) is a general term which is usually entitled to a family of round cutting tools in the form of circular inserts that spin around their axis during machining operation (Shaw et al. 1952; Venuvinod and Rubenstein 1983; Armarego et al. 1991, 1993, 1994a, b). The SPRTs offer a superior performance over the conventionally used cutting tools where the tool rotates continuously which provides a fresh part of the cutting edge into the cutting area. The insert spinning around its center provides a way for carrying the fluid to the tool point as in the case of a journal bearing. This rotation allows the tool to be cooled down; hence, it significantly reduces the adverse effects of temperature on the tool life as well as the workpiece surface quality. In addition, employment of self-propelled rotary tools results in a higher material removal rate (MRR) in machining difficult to cut materials such as...
- Shaw M, Smith P, Cook N (1952) The rotary cutting tool. Trans ASME 74(Aug):1065–1076Google Scholar