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Forum topic by totalrewind posted 07-21-2019 10:48 PM 227 views 0 times favorited 1 reply Add to Favorites Watch
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totalrewind

52 posts in 2720 days


07-21-2019 10:48 PM

Topic tags/keywords: miter saw repair tool repair bearing dewalt

My chop saw started making the DeWalt death squeal, so I pulled it apart to replace the bearings just like this video:

https://www.youtube.com/watch?v=Z3ylXSlh9IE

Problem is, replacing both end bearings doesn’t fix it for me. Now, I admit, I was using a 6202-Z that I happened to have on hand rather than the original 6202-LU. And though it’s not as good (possibly even inadequate) bearing , I think should at least hear a difference. But, alas, no. :(

The thing that really concerns me though is that this bearing slides into the saw with only mild hand-pressure—no tapping/pressing required. Even when installed, the entire armature can wobble up/down quite a lot. Maybe 3/4” or more at the end!

On the other hand, I don’t see any abnormalities in the surface. In fact, there seems to be an o-ring slotted in around the bearing. Why would they do that? Wouldn’t a good, tight machining seal it well enough? Unless they wanted it to be this loose!???

What do you think?
1) Is the saw is designed for this kind of sloppy fit?
2) or do you think my housing has somehow become damaged?

(And, if #2 is there anything I can do about it – besides cry?)

-- For more projects (not just woodworking) check out my project blog at http://theheadlesssourceman.wordpress.com


1 reply so far

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totalrewind

52 posts in 2720 days


#1 posted 07-25-2019 08:30 PM

To whom it may concern:

I’ve found a few different options for sloppy bearing housings.

The “real” answer is to bore out the housing, press in a bushing, and then bore that out to size. Not gonna do that.

Loctite green:
https://www.amazon.com/Vibra-TITE-542-Strength-Anaerobic-Retaining/dp/B004UMP266/ref=sr_1_26?keywords=Loctite+green&qid=1564085624&s=gateway&sr=8-26
https://www.amazon.com/Loctite-LOC640482-Grams-Bearing-Mount/dp/B0053ZNOFK/ref=pd_rhf_se_p_img_2?_encoding=UTF8&psc=1&refRID=3PXPBWNY6R20KW5H40GW

Metalized epoxy: (Looks like JB-Weld to me, but what to I know)
https://www.youtube.com/watch?reload=9&v=bvgjo3IiG1k

Expand the existing metal manually with a punch:
https://www.grainews.ca/2014/12/10/how-to-deal-with-a-loose-bearing-race/

Ball bearing shim rings:
https://www.mcmaster.com/catalog/118/1163
https://www.mcmaster.com/cadinlnord/null

Of all the options, I’m leaning towards loctite, being a little less permanent, and if I have everything assembled while it cures, it should account for any alignment, in case that’s what the manufacturer intended (I’d still like to know). The shim races would be my second favorite for similar reasons.

-- For more projects (not just woodworking) check out my project blog at http://theheadlesssourceman.wordpress.com

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