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A straight teeth slab milling cutter of 100 mm diameter and 10 teeth rotating at 150 r.p.m. is used to remove a layer of 3 mm thickness from a steel bar. If the table feed is 400 mm/minute, the feed per tooth in this operation will be:
1. 0.26 mm
2. 0.4 mm
3. 0.5 mm
4. 0.6 mm

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Correct Answer - Option 1 : 0.26 mm

Concept:

Table speed in mm/minute = f× Z × N

where, N = RPM, Z = no. of teeth, ft = Feed per tooth

Calculation:

Given:

Z = 10, N = 150 rpm, ft = ?, fm = 400 mm/min

Table speed in mm/minute, 400 = 150 × 10 × ft

ft = 0.26 mm

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