Roasting speeds are generally attained by using a worm gear reduction.

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WB
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"F Murtz" wrote in message
ond.com...
This question will be a bit hard to answer.
With a smallish lathe (600 mm centre)and a small drill mill which module
cutter set would be the best to to cut the sort of general purpose gears?
not tiny ones for model making.
one instance would be a gearbox to turn a pig on a spit.
maybe the gears on the end of a sheet metal roller or a swage & jenny
machine,or replacement thread turning gears for a lathe.
Module 1 or 1.5 or 2 etc?