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 > Can I use this bearing?

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Lynnmor

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Posted: 04/25/21 01:52am Link  |  Quote  |  Print  |  Notify Moderator

The darkened areas inside the bearing is called fretting corrosion. It is caused by the small amount of play between the spindle and the inner race and the presence of air which contains oxygen. The play is necessary to allow a slip fit for easy assembly/disassembly, there is no problem. To minimize the fretting, always apply a thin coat of grease to the spindle to help exclude oxygen.





MFL

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Posted: 04/25/21 05:11am Link  |  Quote  |  Print  |  Notify Moderator

I agree ^^^^^

OP...you did a good job with pics!

Jerry





dodge guy

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Posted: 04/25/21 07:39am Link  |  Quote  |  Print  |  Notify Moderator

I see no problems. I would run them.


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BurbMan

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Posted: 04/25/21 04:52pm Link  |  Quote  |  Print  |  Notify Moderator

Huntindog wrote:

Clean them up perfectly and examine them with an eyeloupe.


Not something typically in the driveway toolbox. Just replace the bearings, grease properly and be sure not to over torque the axle nut when you re-install.


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Huntindog

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Posted: 04/25/21 05:52pm Link  |  Quote  |  Print  |  Notify Moderator

BurbMan wrote:

Huntindog wrote:

Clean them up perfectly and examine them with an eyeloupe.


Not something typically in the driveway toolbox. Just replace the bearings, grease properly and be sure not to over torque the axle nut when you re-install.
They are very handy. Affordable too at Harbor Freight.. 3 or 4.00. for the set.


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JRscooby

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Posted: 04/25/21 06:15pm Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

I agree ^^^^^

OP...you did a good job with pics!

Jerry


No matter how good the pic, or for that matter the eye, you can only see a limited number of rollers, and a limited area on each roller. Before I could say "this is good" I must see all sides of all rollers.
But some might be better mechanics than me. I wonder how many only inspect part of the bearings they install on their snot.

alexey75

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Posted: 04/25/21 07:06pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you all!
Cleaned all the bearings this morning, looks good.

I have another question. There is some space between inner and outer bearings.
Was I supposed to fill this space with the grease?

JRscooby

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Posted: 04/26/21 04:26am Link  |  Quote  |  Print  |  Notify Moderator

alexey75 wrote:

Thank you all!
Cleaned all the bearings this morning, looks good.

I have another question. There is some space between inner and outer bearings.
Was I supposed to fill this space with the grease?


When I was taught how to pack bearings, (By Dad, late '50s, when the grease had to hold rollers in place while assembling) grease between the bearings is just wasted grease.
GM Training Center, late '60s, we where taught that space should be MT, so as bearing, and more important brakes, heat the area there will be less pressure on the seal.
Which will have least friction, steel moving past steel with 1/4 inch of air, or that same 1/4 inch full of heavy grease?

Lynnmor

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Posted: 04/26/21 05:27am Link  |  Quote  |  Print  |  Notify Moderator

alexey75 wrote:

There is some space between inner and outer bearings.
Was I supposed to fill this space with the grease?


No, just pack some reserve just inside and outside each bearing. Don't forget to add some grease between the two lips of the seal to reduce wear on it.

alexey75

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Posted: 04/26/21 07:43pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds good, thank you guys!

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