Page 1 of 2 12 LastLast
Results 1 to 15 of 26
  1. #1
    Join Date
    Mar 2009
    Location
    Canberra
    Posts
    19

    Default 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.

  2. #2
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
    Age
    64
    Posts
    4,887

    Default

    Do a search for bearing tolerances.

  3. #3
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    .001" or .04mm per inch of OD always does me solid.

    Sent from my SM-G973F using Tapatalk

  4. #4
    Join Date
    Mar 2009
    Location
    Canberra
    Posts
    19

    Default

    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

  5. #5
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    Quote Originally Posted by aussie260z View Post
    How about you do that pipeclay and tell me what you find
    Cheeky.

  6. #6
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    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.

  7. #7
    Join Date
    Mar 2014
    Location
    South of Adelaide
    Posts
    1,225

    Default

    .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.

  8. #8
    Join Date
    Mar 2014
    Location
    South of Adelaide
    Posts
    1,225

    Default

    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

  9. #9
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

    Default

    Quote Originally Posted by aussie260z View Post
    How about you do that pipeclay and tell me what you find
    e
    After that cheeky comment I think I would be within my rights to think ....why the f*%$ have'nt you looked a bit further your self!

    Can you post your answer here to my query here!

  10. #10
    Join Date
    Aug 2008
    Location
    Melbourne
    Age
    34
    Posts
    1,075

    Default

    I googled recommended bearing fits and found more info on the first page of results than I knew what to do with.

  11. #11
    Join Date
    Aug 2011
    Location
    Melbourne
    Posts
    4,779

    Default

    Also,

    If you are a tad out with your interference fit there are other options;

    Too sloppy, use loctite. Single row tapered roller bearing bore size

    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 Tapatalk
    Girl, 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.

  12. #12
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    6,216

    Default

    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.

  13. #13
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    57
    Posts
    2,651

    Default

    Quote Originally Posted by .RC. View Post
    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.
    Thanks RC - I've never come across that the rotating/stationary consideration before.
    Think you might have your example backwards though. Wheel bearing cups (for a stub axle design) are usually interference fit and the cones are clearance.

    Steve

  14. #14
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    Quote Originally Posted by .RC. View Post
    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.
    I haven't heard of this before.
    What is the reasoning behind it?
    Especially, a clearance fit for one of the races seems counter-intuitive.

  15. #15
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    Quote Originally Posted by simonl View Post
    Too sloppy, use loctite.
    Yes indeed.
    It's brilliant stuff.
    The only small negative is that it's not obvious if it has been used on something you are trying to take apart.
    Adding heat helps.

Page 1 of 2 12 LastLast

Similar Threads

  1. Belt grinder wheel bore size
    By ToolmanTim in forum METALWORK GENERAL
    Replies: 7
    Last Post: 9th Jun 2019, 11:20 PM
  2. Tapered Roller Bearing Cup Removal
    By Anorak Bob in forum METALWORK GENERAL
    Replies: 46
    Last Post: 17th Dec 2013, 02:14 PM
  3. Keyway in a tapered bore
    By bob ward in forum METALWORK GENERAL
    Replies: 11
    Last Post: 13th Sep 2013, 11:06 PM
  4. Heads Up: tapered roller bearings on sale
    By Graziano in forum METALWORK GENERAL
    Replies: 6
    Last Post: 10th Apr 2012, 12:37 AM
  5. Tapered Roller Spindle Bearings for the ATM260
    By dle147 in forum THE HERCUS AREA
    Replies: 3
    Last Post: 12th Nov 2011, 10:24 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •