A gear with 84 teeth is to be machined using a milling process with indexing. The index plate has the following four hole circles: 36, 38, 42, 48. The change gear ratio required is

A gear with 84 teeth is to be machined using a milling process with in

1.	A gear with 84 teeth is to be machined using a milling process with indexing. The index plate has the following four hole circles: 36, 38, 42, 48. The change gear ratio required is
A.	8/21
B.	10/21
C.	21/10
D.	21/8
Answer» C. 21/10

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A gear with 84 teeth is to be machined using a milling process with indexing. The index plate has the following four hole circles: 36, 38, 42, 48. The change gear ratio required is

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