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On 1/30/20 2:11 AM, van.mulders.marcel--- via Fot wrote:
> Barry, if that is true about the rollers/races, how do you explain the
> prescripion about the front wheel bearings : you need to back off the
> stub axle nut to get some play for the bearings?
> Marcel
Likewise with Series Land Rover wheel bearings. Leave them tight and
they quickly die.
TeriAnn
>
> ------------------------------------------------------------------------
> *Van: *"fot" <fot@autox.team.net>
> *Aan: *"fubog1" <fubog1@aol.com>, "Bob Kramer" <rkramer56@gmail.com>
> *Cc: *"fot" <fot@autox.team.net>
> *Verzonden: *Woensdag 29 januari 2020 19:02:55
> *Onderwerp: *Re: [Fot] Differential Pre-load
>
> Preload is more for the life of the bearings than the gears. You
> preload a bearing to take up manufacturing tolerances and account for
> the anticipated (by the manufacturer of the bearings) wear during
> their life time. There does need to be some 'squeeze" between the
> bearing races and the rollers or the rollers will not roll in
> lubrication. If any of you have ever rebuilt the rear outer suspension
> on old XKEs, the tapers roller bearing in the outer wishbone pivots
> wear out because the wishbone only moves up and down a few degrees.
> The tapered roller bearings never fully rotate and cause the rollers
> and race to pit. Roller bearing must roll 360 degrees around to
> survive. Preload makes them do that.
>
> Barry
>
> On Wednesday, January 29, 2020, 09:41:34 AM EST, Bob Kramer via Fot
> <fot@autox.team.net> wrote:
>
>
> I think the main reason a specified amount of preload is required is
> that it sets it up so that the bearings roll under mild tension. To
> tight and the components slide over each other. Too loose and they
> cock in place. Without rolling, bearings will soon fail the same way a
> lifter that doesn't spin fails.
>
> Bob Kramer
>
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<div class="moz-cite-prefix">On 1/30/20 2:11 AM,
van.mulders.marcel--- via Fot wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1663705529.6361055.1580375498550.JavaMail.zimbra@telenet.be">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 10pt; color: #000000">
<div>Barry, if that is true about the rollers/races, how do you
explain the prescripion about the front wheel bearings : you
need to back off the stub axle nut to get some play for the
bearings?</div>
<div>Marcel</div>
</div>
</blockquote>
Likewise with Series Land Rover wheel bearings. Leave them tight and
they quickly die.<br>
TeriAnn<br>
<blockquote type="cite"
cite="mid:1663705529.6361055.1580375498550.JavaMail.zimbra@telenet.be">
<div style="font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 10pt; color: #000000">
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>Van: </b>"fot"
<a class="moz-txt-link-rfc2396E"
href="mailto:fot@autox.team.net";><fot@autox.team.net></a><br>
<b>Aan: </b>"fubog1" <a class="moz-txt-link-rfc2396E"
href="mailto:fubog1@aol.com";><fubog1@aol.com></a>, "Bob Kramer"
<a class="moz-txt-link-rfc2396E"
href="mailto:rkramer56@gmail.com";><rkramer56@gmail.com></a><br>
<b>Cc: </b>"fot" <a class="moz-txt-link-rfc2396E"
href="mailto:fot@autox.team.net";><fot@autox.team.net></a><br>
<b>Verzonden: </b>Woensdag 29 januari 2020 19:02:55<br>
<b>Onderwerp: </b>Re: [Fot] Differential Pre-load<br>
</div>
<div><br>
</div>
<div data-marker="__QUOTED_TEXT__">
<div class="ydpcdfacf56yahoo-style-wrap"
style="font-family:'helvetica neue' , 'helvetica' , 'arial'
, sans-serif;font-size:13px">
<div dir="ltr">Preload is more for the life of the bearings
than the gears. You preload a bearing to take up
manufacturing tolerances and account for the anticipated
(by the manufacturer of the bearings) wear during their
life time. There does need to be some 'squeeze" between
the bearing races and the rollers or the rollers will not
roll in lubrication. If any of you have ever rebuilt the
rear outer suspension on old XKEs, the tapers roller
bearing in the outer wishbone pivots wear out because the
wishbone only moves up and down a few degrees. The tapered
roller bearings never fully rotate and cause the rollers
and race to pit. Roller bearing must roll 360 degrees
around to survive. Preload makes them do that.</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Barry</div>
<br>
</div>
<div id="ydpf5f47a82yahoo_quoted_0792558679"
class="ydpf5f47a82yahoo_quoted">
<div style="font-family:'helvetica neue' , 'helvetica' ,
'arial' , sans-serif;font-size:13px;color:#26282a">
<div> On Wednesday, January 29, 2020, 09:41:34 AM EST, Bob
Kramer via Fot <a class="moz-txt-link-rfc2396E"
href="mailto:fot@autox.team.net";><fot@autox.team.net></a> wrote: </div>
<br>
<br>
<div>
<div id="ydpf5f47a82yiv1894590979">
<div>
<div dir="ltr">I think the main reason a specified
amount of preload is required is that it sets it
up so that the bearings roll under mild tension.
To tight and the components slide over each
other. Too loose and they cock in place. Without
rolling, bearings will soon fail the same way a
lifter that doesn't spin fails.
<div><br clear="all">
<div>
<div
class="ydpf5f47a82yiv1894590979gmail_signature"
dir="ltr">
<div dir="ltr">Bob Kramer</div>
</div>
</div>
<br clear="none">
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
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