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What oil to use for gearboxes and headstock on the Edgwick lathe

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Edgwick one:
Someone suggested hydraulic oil. I thought something like gearbox or diff oil may be better
Any ideas would be most welcome

mechman48:
FWIW; I would use gearbox oil, it has different additives than hydraulic oil;  pressure additives, antifoaming additives, higher viscosity etc, check out the chemical constituents from the MSDS data sheets for better info. I use car gearbox oil from my local Halfords auto store (usual disclaimer) on my lathe. Some members would offer more informed opinions, but any lubricant is better than none, I have known vegetable oil used in emergency situations  :scratch:

George.

appletree:
My Willson lathe uses Hydraulic oil in its gearbox AWS 68 if I recall, I think lots use hydraulic oil.
Hydraulic oil will get flung far and wide in the gearbox, not an EP oil works fine on the gears and lobes in hydraulic pumps.

awemawson:
Beware that some gear oils will dissolve brass or bronze bushes found in older machinery. I think it's the sulphur content that does it and is there for the extreme pressure characteristics, but someone will correct me if I got that wrong  :scratch:

John Rudd:
My new a Chinese lathe uses SAE20 grade for the gearbox...... :scratch:

YMMV.........

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