No 5 & No 7 Circular Pitch Gear Cutters

No 5 & No 7 Circular Pitch Gear Cutters

This topic has 3 replies, 2 voices, and was last updated 7 January 2019 at 20:05 by Brian H.

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7 January 2019 at 15:26 #389852
Brian H
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@brianh50089
On eBay at the moment are 2 sets of circular pitch gear cutters described as No 5 and No 7.

The pitch on the No 5 is given as .6283 on 2 of the cutters and .4488 on the No 7 gears.

I imagine that the No refers to which number in a standard set of 8 cutters but the Circular Pitches given don't seem to match with any of the tables.

Can someone enlighten me?

Brian
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7 January 2019 at 15:26 #26384
Brian H
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@brianh50089
7 January 2019 at 15:46 #389856
Anonymous
A CP of 0.4488 is 7DP and 0.6283 is 5DP. Correct on the 5 and 7.

Andrew
7 January 2019 at 20:05 #389898
Brian H
Participant
@brianh50089
Many thanks Andrew, It never occured to me that they might be DP cutters.

Brian
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