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Old 03-28-2022, 08:02 PM
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Default Pneumatic angle grinder question

Grinder is starting to sound real crunchy, how do I lube this fitting? Just stab a grease needle in there?
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  #2  
Old 03-28-2022, 08:50 PM
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Gimpy, I would take the grinder apart and look at the bevel gears.
Those things get by for an amazing long time without service. You may have a broken tooth, they come apart really easy and you can lube it with white grease then, it gears are intact.
As to your question, the one I have could be oiled by putting the spout of a pump oilcan up to it and push in the ball and give it a squirt.
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Old 03-28-2022, 10:00 PM
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Those fittings require a "ball oiler" for proper application of lubricant. They show up quite often on lathes and other machine tools. As far as I'm concerned they're a proper pain in the ass--an antiquated system that has somehow managed to hang on this long. The correct oilers are hard to find--I've never had one.

That said, I'm with Gerry in suggesting that some light grease is a better choice for lubricant. In any case those import air tools are so cheap that I've never bothered to service any that I've ever had...
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Old 03-29-2022, 06:25 AM
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I see chainsaw bar nose grease guns for sale at TSC and other places pretty cheap, some are pre-loaded disposable ones.
https://www.ruralking.com/catalog/pr...view/id/114851
https://www.acehardware.com/departme...3&gclsrc=3p.ds
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Old 04-21-2022, 08:14 PM
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Those harbor freight cheapies are meant to be thrown away once they get crunchy. I would know, I owned a few. Thankfully they added a new line that comes from a much better supplier. Their "Chief" line is similar to the house-brand from Northern Tool, and even match some AirCat models. They are much, much, much better than the $8.99 models. You can even find them BNIB on ebay for half of what they cost in the store.
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Old 04-27-2022, 06:10 PM
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I see I never updated this thread, my bad.
Turns out it was the retaining nut coming loose. I tightened it up and it's much better now. I did find a grease needle and added a bit to feel better.

Didn't notice any change in sound.
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