Mon, 20 Apr 1998 11:06:59 +0100
- Message No. 2648
From: lawrence_turner@mentorg.com (Lawrence Turner )
Subject: Bearing Axial and Radial Loadings
A few years ago I used to design mechanical equipement with bearings , this
used to be real engineering -- not playing with computers all day :-)
>From memory without looking at databooks ( so don't flame me if you know
different )
Ball bearings -- OK for Radial loading - rotational loads but very poor with
Axial loading ie thrust loads along the shaft or housing.
Taper roller bearings -- Much better where heavy axial loading is present -
requires accurate positioning and preloading for correct operation.
Needle roller bearings - Good for very heavy radial loads.
Angular contact ball bearing - Somewhere between a ball bearing and taper
roller bearing in terms of performance with axial loads - Quite often used as
clutch release bearing in cars.
Any significant axial load on a single row ball bearing is going to cause it to
fail early - so overtightening the rear spindle can overload the bearing inner
race .
If you look at any bearing design handbooks the recommended axial load is
always VERY low compared to the radial loads.
How about using a torque wrench to tighten the rear wheel spindle - this might
help ensure that the spindle is not being overtightened :-))
Have a look at :- http://www.skf.ca/products/ballbearing.html
('98 AT ready to go this week !!)
--
___________________________________________________________
Lawrence Turner
Customer Support Engineer
Mentor Graphics (UK) Ltd Tel: +44(0)1635 811411
Rivergate, Newbury Business Park, Fax: +44(0)1635 810110
London Road,Newbury, Hotline: +44(0)1635 811111
Berkshire, RG14 2QB E-mail: lawrence_turner@mentorg.com
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