4 1/2 grinder head lubricant

[Tgrasher]

I've regreased this Milwaukee angle grinder head shortly after I got it and now it's the same way. All the grease is slung to the side and top leaving the gears running dry. Since I'm using it today, it's going back together with a little more bearing grease, and with STP to fill the void left by the grease. Is there a better grease for this purpose?

 

[1948CaseVAI]

Interesting question - never thought about it. I have never paid more than about $30 for an angle grinder so when they go belly up I throw it away and get another off my shelf. Always figured they get abused in normal use so just treated them like a commodity.

 

[Hdonly]

I have thought about drilling and installing a grease zerk in the head somewhere and just give it an occasional shot from the grease gun. I just recently had to buy a new one and I think it will be the one I try this on.

 

[Brian G. NY]

Redistributing the grease in angle grinders and drills is a good idea. You can get a lot more mileage out of them by doing that. Even the cheap HF tools can benefit. I usually get away with simply "redistributing" the grease that's already there. In only one case, did I clean out the old grease and replace it. I happened to have some CV Joint grease and it seemed to look similar and have the same consistency. How's that for science? Anyway, it seems to be working fine. I still have a really good Craftsman angle grinder with real ball bearings from the 60s or 70s that I periodically do this with.

 

[JimKS]

One thing most people do not realize is if you over grease high speed gear boxes and bearings it will cause over heating and failure.
Jim

 

[Geo-TH,In]

I would use white lithium grease. It doesn't seem to dry and harden.

 

[Mark-Ia]

corn head grease

 

[Bret4207]

I'm still using my original $9.00 angle grinder I bought at Woodworkers Warehouse probably 25 years ago. The gearbox started getting hot about 5 years in. I pulled it apart and added a mixture of grease and oil and made up a sort of runny grease. It's still going strong!

 

[CenTex Farmall]

I use plenty of regular grease and add some gear oil to it. Still using a B&D angle grinder I bought back in the mid 90's. I last had it open 10 or 15 years ago. It's so old that it was made in the US.

It's gotten to where I don't use a new power tool much before I take it apart and check the grease. It seems they put very little in there these days. Probably hard to care when you make min wage on the china assembly line.

 

[glennster]

i use the Stihl grease for the string trimmer heads works good

 

[kevinj54]

I use the same #2 lithium grease that everything else gets.

 

[showcrop]

I use white lithium. It is soft so that it will redistribute itself pretty well.

 

[Ozlander]

(quoted from post at 07:55:53 04/18/21)
I would use moly-disulfide grease.