Table 5
ANOVA table − TF, SR and BH.
| ANOVA for thrust force | ||||||
|---|---|---|---|---|---|---|
| Source of variation | DoF | Sum of squares | Mean sum of squares | F | P | Contribution (%) |
| Feed rate | 2 | 66.331 | 33.166 | 13.3 | 0.017 | 78.58 |
| Drill material | 2 | 8.107 | 4.054 | 1.63 | 0.304 | 9.60 |
| Pooled error | 4 | 9.976 | 2.494 | 11.82 | ||
| Total | 8 | 84.414 | 100 | |||
| ANOVA for Surface Roughness | ||||||
| Feed rate | 2 | 5.926 | 2.9632 | 8.12 | 0.039 | 18.78 |
| Spindle speed | 2 | 24.172 | 12.0859 | 33.10 | 0.003 | 76.59 |
| Pooled error | 4 | 0.146 | 0.3651 | 04.63 | ||
| Total | 8 | 31.5584 | 100.00 | |||
| ANOVA for Burr Height | ||||||
| Feed rate | 2 | 20.028 | 10.014 | 50.4 | 0.019 | 44.89 |
| Spindle speed | 2 | 18.512 | 9.256 | 46.59 | 0.021 | 41.49 |
| Drill material | 2 | 5.679 | 2.839 | 14.29 | 0.065 | 12.73 |
| Residual error | 2 | 0.397 | 0.199 | 0.89 | ||
| Total | 8 | 44.616 | 100.00 | |||
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