welding damage to bearings? - The Combine Forum
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post #1 of 16 (permalink) Old 05-24-2019, 12:23 PM Thread Starter
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welding damage to bearings?

can you damage a bearing if you are welding and ground goes thru it .

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post #2 of 16 (permalink) Old 05-24-2019, 12:59 PM
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Yes. Don't do it.


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post #3 of 16 (permalink) Old 05-24-2019, 02:18 PM
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It definitely pits up the mating pieces but I’ve never actually had a bearing fail that I accidentally done it to.

I did mess up a $2000 carbon fiber drive shaft on my pulling truck by grounding through the thin aluminum paper can that the fiber was wound on. That was a sad day.
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post #4 of 16 (permalink) Old 05-24-2019, 10:39 PM
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can you damage a bearing if you are welding and ground goes thru it .

You already did it, didn't you?
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post #5 of 16 (permalink) Old 05-24-2019, 11:15 PM
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you already did it, didn't you?
lol
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post #6 of 16 (permalink) Old 05-24-2019, 11:25 PM
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Old cat mechanic said you could bugger clutches up in those cats when corking if you put the ground on the hitch. Lol

Any equipment first thing I do before welding is disconnect the the battery grounds. Doesn’t hurt to unplug any monitors as well. Long as your ground is at where you’re welding the chances of buggering up stuff is slim.
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post #7 of 16 (permalink) Old 05-24-2019, 11:28 PM
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can you damage a bearing if you are welding and ground goes thru it .
Only if it's a Chinese bearing and you ground it through the rubber tire.

But seriously would this be a "weld on the rim and ground to the frame" type scenario? My question is if you have a good ground to the part you are welding on current wouldn't travel around the machine through bearings? I know computers are a sensitive thing but I have a hard time believing enough current would indirectly go astray so to wreck a bearing...
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post #8 of 16 (permalink) Old 05-24-2019, 11:48 PM
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I know computers are a sensitive thing but I have a hard time believing enough current would indirectly go astray so to wreck a bearing...

This old myth comes up regularly. My ground is next to where I'm welding. I have yet to disconnect a battery on anything I'm welding on. I have yet to cause any damage other than the turkeyshit mess I generally make with the stick or torch. The electrons will take the shortest path available to them.
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post #9 of 16 (permalink) Old 05-24-2019, 11:56 PM
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This old myth comes up regularly. My ground is next to where I'm welding. I have yet to disconnect a battery on anything I'm welding on. I have yet to cause any damage other than the turkeyshit mess I generally make with the stick or torch. The electrons will take the shortest path available to them.

This is exactly what to do, always think of where the current flow will go, never put the ground where current can flow through a bearing
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post #10 of 16 (permalink) Old 05-25-2019, 01:53 AM
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Whenever I am welding on a shaft or near a shaft where there is a chance of striking accidentally on the wrong piece, I hook a jumper cable from the shaft to the frame. One of Murphy's laws, a welding rod won't strike a clean piece of metal intentionally, but accidentally get too close to a painted pulley that isn't grounded and it will arc every time.

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