Direction: A disc of 200 mm outer and 80 mm inner diameter is faced at a feed of 0.1 mm/rev with a depth of cut of 1 mm. The facing operation is undertaken at a constant cutting speed of 90 m/min in a CNC lathe. The main (tangential) cutting force is 200 N.
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Neglecting the contribution of the feed force towards cutting power, the specific cutting energy in J/mm3 is
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- 0.2
- 2
- 200
- 2000
- 0.2
Correct Option: B
| Specific cutting energy (SCE) = | = | = 2 J / mm3 | ||
| d × f | 0.1 × 1 × 1000 |
