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#4690002 - 03/09/18 08:35 PM Thinning Down Grease
das_peikko Offline


Registered: 01/01/18
Posts: 495
Loc: San Antonio, TX
The most common grease has an NLGI viscosity of 2. I haven't been able to find any NLGI 00 grease, so this afternoon I was trying to thin down some NLGI 2 grease with Walmart SAE 30 oil. I was absolutely amazed by how much oil it takes to thin down grease. You almost have to mix it 50/50 to get it freed up. I'm trying to make NLGI 00 grease when I actually have never seen NLGI 00 grease. All I've heard is that it's closer to an apple sauce consistency.

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#4690011 - 03/09/18 08:46 PM Re: Thinning Down Grease [Re: das_peikko]
Dyusik Offline


Registered: 09/26/14
Posts: 1978
Loc: US-WA
I'm no professor in this topic, but wouldn't an EP gear lube be more appropriate for this endeavor.
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#4690017 - 03/09/18 08:56 PM Re: Thinning Down Grease [Re: Dyusik]
das_peikko Offline


Registered: 01/01/18
Posts: 495
Loc: San Antonio, TX
Good question. The application is the bevel gears inside a 4.5 inch right angle grinder. Gear oil would be ideal, but the gear case is not completely sealed like a gearbox is in a car. Spinning at 11,000 RPM, the gears are going to throw the gear oil out.

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#4690050 - 03/09/18 09:40 PM Re: Thinning Down Grease [Re: das_peikko]
MotoTribologist Offline


Registered: 02/03/16
Posts: 560
Loc: NJ, USA
I believe Dyusik was referring to using EP gear oil as the diluent instead of SAE 30 engine oil. An engine oil like that will offer little to no extreme pressure protection. Bevel gears usually take some high loads, though I'm not familiar with the forces on the parts of an angle grinder, so maybe I'm mistaken.

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#4690228 - 03/10/18 06:44 AM Re: Thinning Down Grease [Re: das_peikko]
SVTCobra Offline


Registered: 12/11/09
Posts: 701
Loc: Battle Creek, MI
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#4690366 - 03/10/18 09:45 AM Re: Thinning Down Grease [Re: das_peikko]
old1 Offline


Registered: 01/04/11
Posts: 999
Loc: Columbus Nebraska
If you have a Snapper OPE dealer near you, they all have "00" grease for the Snapper equipment. They may sell you a small amount if you bring your own container. I always stocked it in quart bottles.
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#4690502 - 03/10/18 12:36 PM Re: Thinning Down Grease [Re: das_peikko]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: das_peikko
Good question. The application is the bevel gears inside a 4.5 inch right angle grinder. Gear oil would be ideal, but the gear case is not completely sealed like a gearbox is in a car. Spinning at 11,000 RPM, the gears are going to throw the gear oil out.


I have always just added a tablespoon of STP.

yes, it weeps at the seam a little.... but nothing to really complain about.

It will NOT "Fly off" the gears!!
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#4690522 - 03/10/18 12:58 PM Re: Thinning Down Grease [Re: MotoTribologist]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: MotoTribologist
I believe Dyusik was referring to using EP gear oil as the diluent instead of SAE 30 engine oil. An engine oil like that will offer little to no extreme pressure protection. Bevel gears usually take some high loads, though I'm not familiar with the forces on the parts of an angle grinder, so maybe I'm mistaken.


There's never more than just a minuscule dab of grease from the factory.

They need a good tacky lube, Like the STP I put in there.
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"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4690882 - 03/10/18 08:29 PM Re: Thinning Down Grease [Re: Linctex]
das_peikko Offline


Registered: 01/01/18
Posts: 495
Loc: San Antonio, TX
I've tried all kinds of different greases inside the grinder. Every time I flip the switch to ON the gear housing would immediately get super hot. So last night just for giggles, I removed all the grease from the gear case. Now it runs cool as a cucumber. smile

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#4690952 - 03/10/18 09:50 PM Re: Thinning Down Grease [Re: das_peikko]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: das_peikko
I've tried all kinds of different greases inside the grinder. Every time I flip the switch to ON the gear housing would immediately get super hot. So last night just for giggles, I removed all the grease from the gear case. Now it runs cool as a cucumber. smile


No thermal transfer happening?

I always add a little extra lube to the angle grinder gear case,
I have never had one "get hot" as a result.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4691146 - 03/11/18 08:04 AM Re: Thinning Down Grease [Re: das_peikko]
46Harry Offline


Registered: 01/08/12
Posts: 406
Loc: hawthorne, Ca.
NLGI #00 grease is available from most of the oil and grease suppliers. Check with dealers that sell in farm and industrial equipment as I know that many gear cases in farm equipment use a 00 grease. Trying to thin a #2 grease with engine oil most likely won't work out well. I would think that WW Grainger would have a #00 grease as they do sell Mobil lubricants.

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#4702376 - 03/21/18 07:23 PM Re: Thinning Down Grease [Re: das_peikko]
buck91 Offline


Registered: 04/17/12
Posts: 2449
Loc: West Michigan
I thinned out some moly paste with synthetic ATF and it worked well. Just used too much ATF in the mixture.
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