Direction: Data for a plain milling operation are given below. Length of workpiece 200 mm Cutter diameter 100 mm No. of teeth 4 Cutter speed 100 rpm Feed 200 mm/min Depth of cut 2 mm Total clearance (entry and exit) 5 mm
-
Machining time for one single pass (in seconds) is
-
- 60
- 66
- 126
- 150
Correct Option: B
| AP = | (D - √D² - d²) | 2 |
= √d(D - d)
= √2(100 - 2) = 14 mm
| Time/cut = | = | × 60 | fm | 200 |
= 65.7 s ≈ 66 s
