I am a complete mechanical dimwit, so I have a dumb question on oil. I recently acquired a free Delta/Rockwell/Homecraft 8" disc sander. I am in the process of cleaning it up and getting it ready for use. I noticed there is a port on the sander for what I assume to be oil. If so, what type of oil do I use? It's likely bone dry inside, because it looks like it's been sitting for awhile.
Machine Oil Question
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It really depends on the type of bearings, but 3 in 1 would probably be the right choice for those. It probably has bronze bushings. If it had roller bearings, then you would see seals at the arbor. If it were roller bearings and they were not sealed already, then a heavier oil would be better for a few reasons.LeeComment
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It really depends on the type of bearings, but 3 in 1 would probably be the right choice for those. It probably has bronze bushings. If it had roller bearings, then you would see seals at the arbor. If it were roller bearings and they were not sealed already, then a heavier oil would be better for a few reasons.
In a pinch some 30wt motor oil.
Never use WD-40 for this. It's not really a lubricant.Last edited by LCHIEN; 05-20-2015, 06:49 PM.Loring in Katy, TX USA
If your only tool is a hammer, you tend to treat all problems as if they were nails.
BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questionsComment
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20 weight non-detergent oil - or at least that's what Delta specifies in the manual. 3 in 1 may also be OK - the manufacturer says it is 20W - but I'm not sure what else might be in the oil, such as detergents, so it would not be my first choice.
You could probably get by with detergent oil - it's getting harder to find non-detergent oil - but avoid synthetics. Some people use Marvel Mystery oil and claim good results, but I have always use the specified 20W oil in my Homecraft lathe, and it has worked well for years.
BTW, you don't need to fill it, just add a few drops every four to eight hours of use. It's normal for the bearings to seep oil a little, and if you overfill it, they will seep much more.Last edited by woodturner; 05-20-2015, 07:26 PM.--------------------------------------------------
Electrical Engineer by day, Woodworker by nightComment
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3-in-1 for motors (blue container, not the red) is non-detergent. It is exactly what is called for in this case.Comment
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Not an expert here, but considering that is pulley-driven, and it appears heavy, I'm inclined to think that normal 3-in-1 is much too light an oil to provide adequate lubrication. IMO, a light machine oil is designed for just that...light-weight use, like for sewing machines, small motor, and similar mechanisms that not under load stress. I'd be more inclined to use a 20 wt non-detergent oil for this particular device.
CWSThink it Through Before You Do!Comment
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Not an expert here, but considering that is pulley-driven, and it appears heavy, I'm inclined to think that normal 3-in-1 is much too light an oil to provide adequate lubrication. IMO, a light machine oil is designed for just that...light-weight use, like for sewing machines, small motor, and similar mechanisms that not under load stress. I'd be more inclined to use a 20 wt non-detergent oil for this particular device.
CWS
http://www.3inone.com/products/motor-oil/Comment
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Not an expert here, but considering that is pulley-driven, and it appears heavy, I'm inclined to think that normal 3-in-1 is much too light an oil to provide adequate lubrication. IMO, a light machine oil is designed for just that...light-weight use, like for sewing machines, small motor, and similar mechanisms that not under load stress. I'd be more inclined to use a 20 wt non-detergent oil for this particular device.
CWS
I don't think 3-in-1 is a light oil; I would not use it for... sewing machines, fishing reels or watches.
It's probably the right stuff for your sander bushing.
Incidentally the 3 uses are lubricating, penetrating, cleaning. that's what the "3" in 3-in-1 stands for.Loring in Katy, TX USA
If your only tool is a hammer, you tend to treat all problems as if they were nails.
BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questionsComment
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Hey, I said I wasn't an expert!
'3-IN-1' (red and black label) appears to be the same viscosity as Gunk 'Super Oil' which is labelled as a "premium machine oil ", "ideal for lubricating hinges, locks, casters, springs, wheels, firearms, fishing reels, sewing machines, appliances... " etc. They may have different properties. I'm not familiar with the 3-IN-1 blue label. I've always used the Gunk product and 3-IN-1 for lightweight applications and 20 and 30 wt oils for heavy motors and bearings that may be under load.
CWSThink it Through Before You Do!Comment
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You do know that mechanical things like that DO have a "smoke" box inside, don't you. Just don't puncture that box and let the smoke out! Oil it good!Hank Lee
Experience is what you get when you don't get what you wanted!Comment
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20 weight non-detergent oil - or at least that's what Delta specifies in the manual. 3 in 1 may also be OK - the manufacturer says it is 20W - but I'm not sure what else might be in the oil, such as detergents, so it would not be my first choice.
Just in case you missed it, I posted a link to the manual for your sander in my prior reply (it seems like links are not so obvious in the new software - just click on the blue "manual" word in the prior reply--------------------------------------------------
Electrical Engineer by day, Woodworker by nightComment
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