Poor Tolerences on New Wheel Bearings?
#1
Poor Tolerences on New Wheel Bearings?
So after weeks of tracking down parts and waiting for them to arrive I started putting my front hubs back together.
I used Timken all around, and I've found the the inner bearing (387A) doesn't slide onto the spindle.
The diameter of the spindle is 2.25" at the bearing surface.
But the bore of my bearing measures 2.10".
Is the fifthteen thousandths due to the bearing being cold? It's only about 45*F around here.
What do you think?
I used Timken all around, and I've found the the inner bearing (387A) doesn't slide onto the spindle.
The diameter of the spindle is 2.25" at the bearing surface.
But the bore of my bearing measures 2.10".
Is the fifthteen thousandths due to the bearing being cold? It's only about 45*F around here.
What do you think?
#2
I had the same issue both times I've rebuilt my axle. Tried multiple brands and ended up concluding it was my spindle, but I've since ran into others with the same issue of the same bearing. I believe it is a manufacturing issue, only thing i can think if. Its a big difference, but you may be able to heat the inner race of the bearing up enough to get it on. \
#3
I had the same issue both times I've rebuilt my axle. Tried multiple brands and ended up concluding it was my spindle, but I've since ran into others with the same issue of the same bearing. I believe it is a manufacturing issue, only thing i can think if. Its a big difference, but you may be able to heat the inner race of the bearing up enough to get it on. \
How did you end up getting the hub back on? Taking a torch to the bearing doesn't seem like a good idea. Lol...
This whole project has been a PITA. From finding correct parts to having idiots send me the wrong parts multiple times to *******es who assembled the axle for the PO and installed the parts backwards or not at all...
The trucks been on stands for nearly a month. I'm pretty fed up.
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#8
It almost has to be an issue with the wrong bearing. Timken lists the 387A as having an inner diameter of 57.15mm which equals 2.25". If you're seeing that much less than that, I'd say you have a bum bearing.
Here, check it out.
That's disconcerting, to say the least.
Here, check it out.
That's disconcerting, to say the least.
#9
It almost has to be an issue with the wrong bearing. Timken lists the 387A as having an inner diameter of 57.15mm which equals 2.25". If you're seeing that much less than that, I'd say you have a bum bearing. Here, check it out. That's disconcerting, to say the least.
Makes you wonder how the bearing passed QC being that far out.
I guess now I get to wait another week for a new bearing...
#10
#11
Something sure doesn't seem right. I've never run across any bearing, much less a Timken, that's 0.015" out of tolerance. I think the tolerance for the bearing fit is supposed to be in the order of tenths of a thousandth.
Makes me wonder if it could be a counterfeit. Or, just the wrong bearing, is the part number clearly engraved or etched on it?
Really frustrating. I wouldn't try to make it fit, 0.015" is way too much interference fit and something will go wrong.
Bob
Makes me wonder if it could be a counterfeit. Or, just the wrong bearing, is the part number clearly engraved or etched on it?
Really frustrating. I wouldn't try to make it fit, 0.015" is way too much interference fit and something will go wrong.
Bob
#12
Something sure doesn't seem right. I've never run across any bearing, much less a Timken, that's 0.015" out of tolerance. I think the tolerance for the bearing fit is supposed to be in the order of tenths of a thousandth. Makes me wonder if it could be a counterfeit. Or, just the wrong bearing, is the part number clearly engraved or etched on it? Really frustrating. I wouldn't try to make it fit, 0.015" is way too much interference fit and something will go wrong. Bob
I bought these bearings from RockAuto, and wondered about their legitimacy after noticing the price. $9 for a bearing you pay $20 for someplace else?
#15
Bob