I have no idea of what they are worth, if you are interested pick a number. The ELS is "An Electronic Leadscrew" The leadscrew is driven by a stepper motor controlled by a "Pic". Screwcutting of just about any pitch metric or imperial is possible together with feeds suitable for Turning. Look at htt...

The change wheels I have are as follows

16 x 2
20
28 x 2
32 x 4
40
44 x 2
48
66+18
72+18 x 2
80 x 2
100 x 2 but one has had broken teeth someone tried to repair by brazing

Plus the reversing assembly with idlers

On my machine the Apron face to the leadscrew is .750, the screw is .750 therefore face to centre of half-nut is 1.125. The top and bottom half nuts fitted are .087 spaced away from the Apron face. However I have an additional half of a half-nut, the top one. I assume that the bottom half was damage...

Taylon,
Are you still looking for change wheels for your Viceroy? If so I have a selection that I do not need.

Richard

Whilst in the process of sorting my Viceroy I find that the surfacing Worm and Wheel are knacked!
Anyone know of a source for these?

I'm not sure the changewheel lathes ever had a thread/feed plate actually on the machine - it may have been only in the manual. Which I do not have. All I have seen are the ones with a gearbox. I believe that the arrangement and gears would be very similar to a Boxford, which has the following gears...

[quote="Andy B"]The CH series drawing/part numbers were used for all plates & labels - for spindle speeds, nameplates, 'wear eye protection', threads & feeds, etc. I'm guessing you have these 2 plates for your lathe but you are missing the threadcutting plates. You guess correctly Is yours a gearbox...

Those drawings are the Charts 151 and 155 - have you any other info to go from ? Are these other posts helpful... ? https://www.denfordata.com/bb/viewtopic.php?t=933 https://www.denfordata.com/bb/viewtopic.php?t=994 https://www.denfordata.com/bb/viewtopic.php?t=930 I am sure that they will be when ...

As you correctly guessed not really what I want. I actually require the original Charts 151 and 155 which I assume will show the change wheels required for different screwcutting and surfacing pitches. Thanks for your very prompt help on return to work and a very happy New Year to you and all on the...

Does anyone have Charts 151 and 155 which give change wheel info for screwcutting and surfacing. I would be obliged to have sight of them.