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Thinning Down Grease #4690002
03/09/18 08:35 PM
03/09/18 08:35 PM
Joined: Jan 2018
Posts: 538
San Antonio, TX
das_peikko Offline OP
das_peikko  Offline OP
Joined: Jan 2018
Posts: 538
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.

Re: Thinning Down Grease [Re: das_peikko] #4690011
03/09/18 08:46 PM
03/09/18 08:46 PM
Joined: Sep 2014
Posts: 2,177
US-WA
Dyusik Offline
Dyusik  Offline
Joined: Sep 2014
Posts: 2,177
US-WA
I'm no professor in this topic, but wouldn't an EP gear lube be more appropriate for this endeavor.


95 Cherokee 190K DELO 10W30, XG8
07 IS250 103K Napa 10w30, FULL
04 YZF-R1 19K DELO 15w40, XG7317
99 HD XL1200S 21K VR1 20w50, NG1515
14 RX450h 35k PP MIX, NG7047
Re: Thinning Down Grease [Re: Dyusik] #4690017
03/09/18 08:56 PM
03/09/18 08:56 PM
Joined: Jan 2018
Posts: 538
San Antonio, TX
das_peikko Offline OP
das_peikko  Offline OP
Joined: Jan 2018
Posts: 538
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.

Re: Thinning Down Grease [Re: das_peikko] #4690050
03/09/18 09:40 PM
03/09/18 09:40 PM
Joined: Feb 2016
Posts: 686
NJ, USA
MotoTribologist Offline
MotoTribologist  Offline
Joined: Feb 2016
Posts: 686
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.

Re: Thinning Down Grease [Re: das_peikko] #4690228
03/10/18 06:44 AM
03/10/18 06:44 AM
Joined: Dec 2009
Posts: 762
Battle Creek, MI
SVTCobra Offline
SVTCobra  Offline
Joined: Dec 2009
Posts: 762
Battle Creek, MI


Think twice, speak once.
Re: Thinning Down Grease [Re: das_peikko] #4690366
03/10/18 09:45 AM
03/10/18 09:45 AM
Joined: Jan 2011
Posts: 1,066
Columbus Nebraska
old1 Offline
old1  Offline
Joined: Jan 2011
Posts: 1,066
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.


2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 15/40 Delo
1929 ford model A No filters, and 15/40 oil
Re: Thinning Down Grease [Re: das_peikko] #4690502
03/10/18 12:36 PM
03/10/18 12:36 PM
Joined: Dec 2016
Posts: 7,142
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,142
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!!


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Thinning Down Grease [Re: MotoTribologist] #4690522
03/10/18 12:58 PM
03/10/18 12:58 PM
Joined: Dec 2016
Posts: 7,142
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,142
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.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Thinning Down Grease [Re: Linctex] #4690882
03/10/18 08:29 PM
03/10/18 08:29 PM
Joined: Jan 2018
Posts: 538
San Antonio, TX
das_peikko Offline OP
das_peikko  Offline OP
Joined: Jan 2018
Posts: 538
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

Re: Thinning Down Grease [Re: das_peikko] #4690952
03/10/18 09:50 PM
03/10/18 09:50 PM
Joined: Dec 2016
Posts: 7,142
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,142
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."
Re: Thinning Down Grease [Re: das_peikko] #4691146
03/11/18 07:04 AM
03/11/18 07:04 AM
Joined: Jan 2012
Posts: 422
hawthorne, Ca.
46Harry Offline
46Harry  Offline
Joined: Jan 2012
Posts: 422
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.

Re: Thinning Down Grease [Re: das_peikko] #4702376
03/21/18 06:23 PM
03/21/18 06:23 PM
Joined: Apr 2012
Posts: 2,697
West Michigan
buck91 Offline
buck91  Offline
Joined: Apr 2012
Posts: 2,697
West Michigan
I thinned out some moly paste with synthetic ATF and it worked well. Just used too much ATF in the mixture.


2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop

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