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Moldule and DP gears

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17/11/2009 22:14:19

I have a Leinen lathe that uses 1.25 module change wheels for screw cutting.

I would like to cut some gears that I need but am unable to find anywhere that sells a 1.25 module cutter at a reasonable price (tried Chronos, RDG, Tracy Tools, Arc Euro and generally looking on the internet).

I only need a couple of cutters for gears with higher number of teeth, upwards of 55.

Couple of questions

1. Anyone know where to get the cutters?

2. Anyone have experience of running 20 DP gears with 1.25 module ones? From my working out on a gear with a PDM of 150mm and 120 teeth that I have, it is 20.3DP, and a 6" gear with 120 teeth would have a module of 1.27 by my reckoning.

Since 20DP cutters are fairly cheap I was going to make 20DP gears and go with the slight error as the gear ratios will still be the same, just wondered what other thoughts were?

Thanks

Steve

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