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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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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...

Measure twice and cut once...or...wait, was that the other way around?
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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.
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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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