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8th Aug 2020, 10:32 PM #1Novice
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Single row tapered roller bearing bore size
Hoping someone could help with dimensions or appropriate chart....
Wanted to find bore dimensions for the interference fit for the outer bearing race for Single Row tapered Roller bearings.
For example D = 50mm, what size does the Bore have to be to create the interference fit for the outer race that the bearing locates in?
The material of the bore would be 1045.
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8th Aug 2020, 10:44 PM #2Most Valued Member
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Do a search for bearing tolerances.
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8th Aug 2020, 11:19 PM #3Most Valued Member
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.001" or .04mm per inch of OD always does me solid.
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9th Aug 2020, 12:36 AM #4Novice
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How about you do that pipeclay and tell me what you find
Yeah thanks for that - been looking for a bit and wasn’t able to find anything specific....
Does that measurement change depending on the size of the bearings or it stay constant? Like 50mm OD on D compared to 150mm on D?
Also What about material....say if you were using 6061? Tolerances stay the same
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9th Aug 2020, 12:54 AM #5Mechanical Butcher
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9th Aug 2020, 11:07 AM #6Most Valued Member
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My machinery handbook has a good chapter on bearing press fits. I normally follow that rule of thumb except in plastics where you need a much tighter press. Aluminium you can be a bit tighter too but I find it does the job 99% of the time.
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9th Aug 2020, 11:49 AM #7Diamond Member
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.0005-.001" per 1" of diameter or .012-.025mm per 25mm of diameter is the general rule. so for a 50mm bearing od .025-.05mm interference.
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9th Aug 2020, 11:56 AM #8Diamond Member
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first result from googling "bearing tolerences". Should tell you all you ever need to know about bearing fits.
https://www.skf.com/au/products/roll...resultant-fits
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9th Aug 2020, 06:56 PM #9Most Valued Member
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9th Aug 2020, 07:13 PM #10Gear expert in training
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I googled recommended bearing fits and found more info on the first page of results than I knew what to do with.
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9th Aug 2020, 07:16 PM #11Most Valued Member
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Also,
If you are a tad out with your interference fit there are other options;
Too sloppy, use loctite.
Too tight, put bearing outer in freezer and/or put OD part in oven. Its amazing how small variations in temp can change a tight interference fit into a sliding fit.
Other than that, 1 thou per inch is the general rule.
Cheers,
Simon
Sent from my SM-G970F using TapatalkGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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9th Aug 2020, 09:28 PM #12Pink 10EE owner
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The first question is what is rotating and what is stationary?
Think of wheel bearings on a vehicle axle. The cups are a clearance fit, while the cone is an interference fit. Now think of a spinning shaft, the opposite is true.
The spinning part of the bearing is always an interference fit.Gold, the colour of choice for the discerning person.
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10th Aug 2020, 09:41 AM #13Most Valued Member
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10th Aug 2020, 10:03 AM #14Mechanical Butcher
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10th Aug 2020, 10:07 AM #15Mechanical Butcher
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