Why hard turn? Basically, because lathes are relatively cheaper than grinders, multiple operations are done in single in kind setup, and more metal is frequently removed (as compared to, grinding). Hard turning incorporates single-point turning tangled skein contours to low microinch finishes (typically 8 to 12 [micro]in.). without an additional machine tool.
When machining hardened dirk it's important to keep in mind that the range can be up to 68 Rockwell (C); part continuance to. diameter ratio should be 4:1 for unsupported work and up to 8:1 for supported work; and the machine (base and
