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A straight teeth slab milling cutter of 100 mm diameter and 10 teeth rotating at 200 rpm 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
  • a)
    0.2 mm
  • b)
    0.4 mm
  • c)
    0.5 mm
  • d)
    0.6 mm
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A straight teeth slab milling cutter of 100 mm diameter and 10 teeth ...
F = fT x Z x N where f = table feed;
fT = feed / tooth; Z = Number of teeth
N = RPM
So, 400 = FT x 10 x 200
fT = 400/2000
= 0.2 mm
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Most Upvoted Answer
A straight teeth slab milling cutter of 100 mm diameter and 10 teeth ...
Given data:
- Diameter of the milling cutter: 100 mm
- Number of teeth on the milling cutter: 10
- Rotational speed of the milling cutter: 200 rpm
- Thickness of the layer to be removed: 3 mm
- Table feed: 400 mm/minute

Feed per tooth:
Feed per tooth is the distance traveled by the milling cutter in one revolution divided by the number of teeth on the cutter.

Calculating feed per tooth:
- Circumference of the milling cutter = π * diameter
= 3.14 * 100 mm
= 314 mm
- Distance traveled by the milling cutter in one revolution = circumference of the milling cutter
= 314 mm
- Feed per tooth = Distance traveled by the milling cutter in one revolution / Number of teeth on the cutter
= 314 mm / 10
= 31.4 mm

Converting feed per tooth to mm:
Since the table feed is given in mm/minute, we need to convert the feed per tooth to mm/minute.

- Feed per tooth = 31.4 mm
- Feed per tooth in mm/minute = Feed per tooth * Rotational speed of the milling cutter
= 31.4 mm * 200 rpm
= 6280 mm/minute

Comparing feed per tooth to table feed:
- Feed per tooth in mm/minute = 6280 mm/minute
- Table feed = 400 mm/minute

Since the feed per tooth is greater than the table feed, it means that each tooth of the milling cutter removes more material than the table feed in one minute. Therefore, the feed per tooth in this operation will be 0.2 mm (option A).
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A straight teeth slab milling cutter of 100 mm diameter and 10 teeth rotating at 200 rpm 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 bea)0.2 mmb)0.4 mmc)0.5 mmd)0.6 mmCorrect answer is option 'A'. Can you explain this answer?
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