Round Inserts Improve Profiling With Long Overhangs In Narrow Grooves
Sandvik Coromant -RM inserts for CoroCut QD for Y-axis parting enables profiling with long overhangs in narrow grooves, external profiling, the generation of recesses and undercuts, and the potential to use nonlinear turning and grooving with a full radial bottom.
Posted: October 21, 2020
Sandvik Coromant (Fair Lawn, NJ) adds round geometry (-RM) inserts to its program of CoroCut QD parting-off and grooving tools. Round geometry enables profiling with long overhangs in narrow grooves, external profiling, the generation of recesses and undercuts, and the potential to use nonlinear turning and grooving with a full radial bottom.
Benefits of using the inserts with CoroCut QD holders include better tool life and chip control with a rigid insert seat, internal over- and under-coolant for improved process security and chip evacuation, and the potential for use with a Y-axis blade.
A customer case example demonstrates potential gains. A shaft made from 42CrMo4 alloy steel required grooving operations on a Niles-Simmons N30 CNC lathe. Using a CoroCut QD holder with -RM inserts instead of a competitor’s solution doubled tool life with far better chip control. The cutting data was identical for both tools: 290-rpm spindle speed; 160–180 m/min (525–591 ft/min) cutting speed; 0.3 mm/rev (0.012 in/rev) feed rate; and 2.7 mm (0.106 inch) axial depth of cut.
Three grades are available for the inserts:
- GC1125 for finishing in all materials as well as certain roughing operations in non-ferrous metals, heat-resistant super alloys (HRSAs), and titanium.
- GC1135 for roughing in stainless steel and HRSAs.
- GC4335 for roughing steel and cast-iron workpieces.
The assortment is available in four insert sizes: 0.118-, 0.157-, 0.236-, and 0.315-inch (3, 4, 6, and 8 mm).
