What is FDR please?

They will not run together as a pair, the DPs need to match

Edited By Brian Wood on 10/10/2020 14:03:07

FDR Feedrate?

They will run together but not for long as both will wear badly but ratio will be the same as if matching DP

Jason,

They can't both be the same diameter and have the same number of teeth, the 24 DP wheel will be smaller in diameter for the same number of teeth if that is chosen as the governing parameter.

If I remember the earlier post correctly, Sorceror has a 24 tooth wheel and a 127 tooth wheel, both in 24 DP. He could retain those to run together and operate the first part of the train in 20 DP as Martin Cleeve did, having a 20DP and 24DP pair coupled together to make the transition

Brian

24dp change gears do come up from time to time on EBay, I've bought a number from that source. I think Exe lathes might have used them, but stand to be corrected on that. The gears that I've purchased have has a 7/16 in. bore, but that is pretty easy enough to change.

As Jason says above, 1MOD (MOD1) are readily available and very similar diameter to 24dp, but won't run meshed with them. As well as being available for the various mini lathes they are also available from other sources, particularly suppliers that sell parts for home build robots. One supplier that I've done business with and been happy with their products is Technobots, but I'm sure that there are many more, try checking with bearing suppliers as they usually do other drive train products as well.

I'd go with someone like Beltingonline for most of them, a 50T would be half the price of a 50T Myford gear and if you saw it in half then you can get two out of one which makes it 1/4 the price. SC4 127T from ARC is £22.

Leave all the gears that are in the head 24DP and just change from the output shaft down to the leadscrew which are the ones you will want to be swapping about for screwcutting.