Logan 200 Lead Screw Speed And Chuck Removal

I've listed the change gears I have in a separate post (Logan 200 change gears)
 
Just sitting here (wasting time) you are running a feed of about .0171"/rev or 58.3 threads per inch.
Calculated as follows:
18:60 = 0.3000
30:70 = 0.457143
Reduction in one rev = 0.137143 (reductions above multiplied together)
Since Logan leads crews have a pitch of 8tpi (0.125) multiply the reduction by the 0.125 "/rev.
 
My Logan 200 came with 6 gears. Fortunately it was configured for a slow feed rate. After scratching my head for a while I realized i was missing quite a few gears and a stud to configure like Fig. 2 of the gear chart. After three ebay transactions I now have the 17 gears needed for all combinations. Realistically 15 is enough but you will be taking apart stacked gear combination. Having 2 extra gears help speed things up when changing gears.

I'm not sure what the Lathe originally came with but here's what I recommend. For most work leave the lathe configured for "next to the slowest" feed rate. The slowest rate is fine also but will require you to move more gears when you want to thread. This allows you to leave the 72 tooth gear on the idler shaft for most threading. The 72 tooth can be used in other positions for slow feed rates but they really are not that important.

Here's the gears I think you need:

24 tooth
32 (need two of these)
36
40
44
46
48
52
54
56
60
72 (on idler stud)
24/48 stacked gears on bushing
18/54 stacked gears on bushing

Here's a picture of the gears I have (note the 72 tooth on the stud) and what I would call my standard configuration.

WP_20150704_001.jpg
WP_20150704_002.jpg
 
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