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Warco Super Major Milling Machine - Gearbox Oil

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Lee Jones 625/05/2020 10:37:06
223 forum posts
123 photos

Just putting my Warco Super Major Milling Machine gearbox back together.

The operating instructions say to use a non-detergent SAE 30 oil.

I don't have SAE 30, but I do have ISO 68 (which Harrison recommends).

According to the conversion chart below, they are very similar.

My question is, would it be suitable to use ISO 68 instead?


thaiguzzi25/05/2020 10:49:59
698 forum posts
131 photos

Yes, no probs, or use 80/90w gearbox oil, whichever is easier to hand.

Dave Halford25/05/2020 11:10:07
1022 forum posts
9 photos

SAE 30 is VW Beetle aircooled engine oil, diff oil is OK if there's no bronze in the box

Edited By Dave Halford on 25/05/2020 11:10:37

SillyOldDuffer25/05/2020 11:27:04
6454 forum posts
1421 photos
Posted by Dave Halford on 25/05/2020 11:10:07:

... diff oil is OK if there's no bronze in the box


Lathes and mills aren't fussy about oil, but watch out for performance oils. High pressure oils often contains additives that attack Copper, and Copper is used in some bearings and gears. Check the Oil's label for any mention of incompatibilities. Plain oils are fine.


Lee Jones 625/05/2020 12:22:13
223 forum posts
123 photos

This is what I have:


AdrianR25/05/2020 12:42:09
488 forum posts
25 photos

I went through the what oil to use a while back. The advise I got here is ISO VG 68/ SAE 30 Hydraulic oil is fine. Also a lot cheaper than the little bottles of 'special' lathe/mill oil some companies sell.


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