Real simple- They are tapered. As the piece is tightened, it is forced
farther onto the shaft, therefore, the progressively smaller diameter is
being forced onto the progressively larger one. They aren't just fit on to
each other- they are actually tightened into place.
Scott
----- Original Message -----
From: "Pete & Aprille Chadwell" <pandachadwell@mac.com>
To: "Triumphs Mailing List" <triumphs@autox.team.net>
Sent: Thursday, October 25, 2001 6:31 PM
Subject: What's the deal with tapered shafts?
> Obviously, I'm not an engineer
> otherwise I suspect I wouldn't need
> to ask this question:
>
> Why is it, exactly, that tapered shafts which fit into tapered bores
> are such a royal pain the a** to disassemble? Cases in point: TR6
> rear inner axle shafts/drive flanges, TR6 outer stub axle/hub, TR6
> front stub axle/vertical link, upper ball joints, tie rod ends and
> the list goes on.
>
> Why on Earth are these things so stubborn when there's not even a NUT
> holding them together anymore?! Seems like they oughtta just come
> right apart once the nut is loosened and removed.
>
> I'm installing new front stub axles, and while the driver's side stub
> axle came out with just a few good whacks with a ball peen hammer,
> the passenger side does not want to come apart at all, even when
> pounded on mercilessly with a 5 pound sledge. All this struggling
> motivates me to finally seek an understanding of what's behind this,
> because it has always puzzled me.
>
> --
> Pete Chadwell
> 1973 TR6
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