The sleeve provides triangulation to help resist axle bending. The
tensil loads
are not the problem. Suit yourself. Everyone has an opinion.
D
BJ8Healeys wrote:
> But, Dave..... if the distance piece is put into compression by
> torquing the nut, the stub axle will see exactly the same amount of
> TENSION, yes? This would move the tensile loads on the stub axle
> closer to its ultimate tensile strength, and reduce any margin
> available to resist bending loads from driving. Any up-bending loads
> on the axle are translated into tensile loads on its bottom surface.
>
> This is another one of those discussions that comes up on the list
> periodically. I respectfully submit that the distance piece does not
> add any strength to the stub axle. It is there only to preload the
> bearings.
>
> Steve Byers HBJ8L/36666 BJ8 Registry Havelock, NC USA
>
> -----Original Message----- From: owner-healeys@autox.team.net
> [mailto:owner-healeys@autox.team.net]On Behalf Of Dave & M Sent:
> Monday, May 22, 2006 5:56 PM To: jerry adams Cc: Healey list Subject:
> Re: Re; Front wheel bearings BN2-BJ8
>
>
> Hi folks,
>
> My take on the front axle "distance pieces". The Austin stub axles
> are a bit small/weak for the Healey applications.
>
> Since the distance pieces are considerably larger in diameter than
> the stub axles & installed in compression, 50 to 70 ft/lb of preload,
> they act to effectively increase the stub axle diameter & greatly
> reduce the bending moment on the axles. Stiffen/strengthen the axles,
> if you will.
>
> A bearing is never intended to have this much side/end load, so the
> distance piece assembly is shimmed to reduce the bearing side load
> while still maintaining a good deal of compression on the distance
> pieces to increase the axle strength.
>
> A very clever if somewhat unknown advantage of this feature.
>
> Dave Russell BN2
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