Table 3 Experimental design.
Factor | Level 1 | Level 2 | Level 3 | Level 4 |
|---|---|---|---|---|
Cutting speed (m/min) | 45 (S1) | 55 (S2) | 65 (S3) | 75 (S4) |
Feed (mm/tooth) | 0.01 (F1) | 0.03 (F2) | 0.05 (F3) | 0.07 (F4) |
Depth of cut (mm) | 0.075 (D1) | 0.15 (D2) | 0.225 (D3) | 0.3 (D4) |
Lubricating medium | Dry (L1) | Compressed air (L2) | Sunflower bio-oil (L3) | 0.6 vol% Alumina-sunflower bio-oil (L4) |
