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MarkL

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Reply with quote  #16 
Quote:
Originally Posted by Danny Harvey
Pete,

"the current (heating) crowds toward the inner ring of the bearing,"

By this do you mean towards the bore?

"...But if we start with a lot of very gross simplifying assumptions...)

Absolutely necessary for me to keep up.

I wonder how hot the bearing would have to get to close up the clearances in order to make the marks you have. I would also wonder if that estimate would match up with an estimate of the temperature the bearing was exposed to by a color comparison.

On suggestion might be to subject a sacrificial bearing to the same process and see what you get.  


Grr google express isn't available outside the US so cannot see what the link is.




electricpete

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Reply with quote  #17 
Quote:
Grr google express isn't available outside the US so cannot see what the link is.

Danny's google express link was a 22 quart Roaster oven from Oster like this one:
https://www.walmart.com/ip/Oster-26-Lb-Roaster-Oven-with-Self-Basting-Lid-22-Qt/47547933?wmlspartner=wlpa&adid=22222222227034933948&wl0=&wl1=g&wl2=c&wl3=76882900952&wl4=aud-273067695102😋la-149610047072&wl5=9027733&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=online&wl12=47547933&wl13=&veh=sem


Danny Harvey

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Reply with quote  #18 
I not certain that is the exact model.  I'd have to check the specs their Engineering Department developed to know exactly what size turkey roaster is right.
dnk

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Reply with quote  #19 
Danny Harvey showed image of oil bath. I think that is best way to heat bearing evenly.  Used that always until 2005 when hr decided it was to dangerous.

JuddJones

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Reply with quote  #20 
I can't disagree with that being one of the most even ways to heat the bearing, but that is a nightmare to keep clean. I think that is just as important a consideration to installing a new bearing. I cringe every time I see one of our millwrights installing fresh bearings in the shop with dirty gloves, on a dirty table, with someone welding/grinding 30 feet away.
fburgos

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Reply with quote  #21 
Quote:
Originally Posted by Big J
I can't disagree with that being one of the most even ways to heat the bearing, but that is a nightmare to keep clean. I think that is just as important a consideration to installing a new bearing. I cringe every time I see one of our millwrights installing fresh bearings in the shop with dirty gloves, on a dirty table, with someone welding/grinding 30 feet away.


Don't forget taking the grease by hand from a bucket without a lid,

This is the right way, right??
dnk

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Reply with quote  #22 
If mechanic are using dirty gloves and grinding in the area, this says all you need to know about their maintenance program. If that is their work habits it doesn't matter how they heat and mount bearings.



Quote:
Originally Posted by Big J
I can't disagree with that being one of the most even ways to heat the bearing, but that is a nightmare to keep clean. I think that is just as important a consideration to installing a new bearing. I cringe every time I see one of our millwrights installing fresh bearings in the shop with dirty gloves, on a dirty table, with someone welding/grinding 30 feet away.
 
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