1986 1024 Enco
It came about 5 gears, wired together and never used.
No mention of them in what little I have of a similar owners manual.
The machine already has a QC box.
The thread chart seems to indicate a 60-tooth gear in the geartrain.

The lathe came to me with the following gears installed:

Output gear from headstock 40T keyed
Idler gear on banjo 70T, bearing in center
Input gear to QC 40T keyed

The extra gears are,
25T keyed
25T keyed
39T approx, keyed
43T keyed
60T with hub, keyed

I can't figure out when and how these should be used.
This lathe is probably similar to an older Jet 10x24

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Rex Burkheimer
WM Automotive
Fort Worth TX