Table 3.
Mechanical bill of materials summary.
| Component | Qty | Cost per unit (USD) |
Total cost (USD) |
|---|---|---|---|
| Drill press stand | 1 | 46.99 | 46.99 |
| Arduino DIN rail mount | 1 | 35.00 | 35.00 |
| Driveshaft coupler | 1 | 8.99 | 8.99 |
| Stepper motor mount | 1 | 19.99 | 19.99 |
| 3-Inch vise | 1 | 14.36 | 14.36 |
| Electronics enclosure | 1 | 48.99 | 48.99 |
| Driveshaft sleeve bushings | 2 | 2.35 | 4.70 |
| M4 × 0.7 by 85 mm screw | pkg of 10 | 17.27 | 17.27 |
| M4 × 0.78, 30 mm bolts | pkg of 5 | 3.71 | 3.71 |
| M5 × 0.8, 14 mm bolts | pkg of 100 | 14.92 | 14.92 |
| M4 × 0.7 hex nut | pkg of 100 | 3.11 | 3.11 |
| DIN rail | 2 | 4.57 | 9.14 |
| Total | $178.18 |