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Hello David, you are right about the weakness of the stub axle without the =
spacer. But, your information is 50 yrs. old. With the new roller bearing=
kits you keep the spacer. I went with the rollers after I replaced the ba=
ll bearings and there was too much endplay and no way to adjust. With the =
rollers you can shim them for proper end play. I only have about 5000 mile=
s on them but they seem to be working just fine. Many people prefer the ba=
ll bearings but I think the new roller kits are a reasonable alternative. =
(my view is from a street use, not racing. I have no experience with racin=
g set ups.)
Here is an article that explains exactly what you were mentioning:
https://www.mgexp.com/article/mg-midget-and-sprite-front-wheel-bearings.271
Jack
[https://www.asnstatic.com/article/mgb/mg-midget-wheel-bearings/original-be=
arings.jpg]<https://www.mgexp.com/article/mg-midget-and-sprite-front-wheel-=
bearings.271>
MG Midget & Sprite Front Wheel Bearings : How-To Library : The MG Experienc=
e<https://www.mgexp.com/article/mg-midget-and-sprite-front-wheel-bearings.2=
71>
Here's an interesting thing: there should be no reason why tapered roller b=
earings could not be used in the Midget hub. If the inner bearing that is u=
sed has the necessary 2mm radius to clear the base of the stub axle, and if=
the whole assembly is shimmed properly, using the spacer between the two b=
earings (following the MGB shimming procedure).
www.mgexp.com
________________________________
From: Spridgets <spridgets-bounces@autox.team.net> on behalf of David Doiro=
n via Spridgets <spridgets@autox.team.net>
Sent: Monday, October 25, 2021 10:49 PM
To: Spridgets <spridgets@autox.team.net>
Subject: [External] [Spridgets] Roller bearings...again
Dear List,
Every so often the old chestnut of putting roller bearings in the
front hubs of Sprites is resurrected.
Seems like a good idea no?
NO!!!
Just saw it again in an article in the November Healey Marque on
converting a Sprite to disc brakes. Here is my experience.
When I changed my Sprite to front disc brakes back in the mid 60s,
I went right out and got the roller bearings and did that conversion
as well.
And then I broke a swivel axle. "Bad part" I thought, and fitted a
new one. Some months later the other side broke.
Then the old heads at the shop clued me in:
The weak link in the Sprite front suspension is NOT the bearing!
I went back to the ball bearings WITH the correct distance piece,
and have in the following 53 years put a cumulative 450,000 miles on
3 of my Sprites. There have been no further swivel axle failures.
The "why" goes something like this:
Ball bearings with spacer done up tight give the swivel axle an
effective diameter that includes the inner races as well as the spacer.
Roller bearings cannot use the spacer, so the net size of the swivel
axle (read "strength") is effectively less than factory design.
Add to that the age of the parts, the variation in the materials over
the years, and (the biggie) the wider tires used today.
The risk of breaking a swivel axle is greatly increased with roller bearing=
s,
UNLESS you NEVER drive the car in a Spritely manner!
In both of the cases where my swivel axles broke, steering became unpredict=
able.
If I had been on a mountain road, or crossed over into opposing traffic,
my fate would have also been unpredictable.
The original designers at Austin had it right.
Please call with any questions,
W David Doiron...ex BMC mechanic
602-550-3583
------------------------
spridgets@autox.team.net
www.team.net%2Fdonate.html&data=3D04%7C01%7Cjorkin%40emory.edu%7Cb5ddcd=
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<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
Hello David, you are right about the weakness of the stub axle without=
the spacer. But, your information is 50 yrs. old. With the new=
roller bearing kits you keep the spacer. I went with the rollers aft=
er I replaced the ball bearings and there was too much
endplay and no way to adjust. With the rollers you can shim them for=
proper end play. I only have about 5000 miles on them but they seem =
to be working just fine. Many people prefer the ball bearings but I t=
hink the new roller kits are a reasonable alternative.
(my view is from a street use, not racing. I have no experience with=
racing set ups.) </div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
Here is an article that explains exactly what y<span style=3D"color: rgb(0,=
0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt=
;">ou were mention</span><span style=3D"color: rgb(0, 0, 0); font-family: C=
alibri, Arial, Helvetica, sans-serif; font-size: 12pt;">ing:</span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<span style=3D"color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,=
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</span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<span style=3D"color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,=
sans-serif; font-size: 12pt;"><a href=3D"https://www.mgexp.com/article/mg-=
midget-and-sprite-front-wheel-bearings.271" id=3D"LPlnkOWALinkPreview">http=
s://www.mgexp.com/article/mg-midget-and-sprite-front-wheel-bearings.271</a>=
</span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
Jack</div>
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1">
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t: 12px; height: 199.125px; overflow: hidden; width: 240px;">
<a target=3D"_blank" id=3D"LPImageAnchor131203" href=3D"https://www.mgexp.c=
om/article/mg-midget-and-sprite-front-wheel-bearings.271"><img id=3D"LPThum=
bnailImageId131203" alt=3D"" height=3D"199" style=3D"display: block;" width=
=3D"240" src=3D"https://www.asnstatic.com/article/mgb/mg-midget-wheel-beari=
ngs/original-bearings.jpg"></a></div>
</td>
<td style=3D"width: 100%;">
<div id=3D"LPTitle131203" style=3D"font-size: 21px; font-weight: 300; margi=
n-right: 8px; font-family: wf_segoe-ui_light, "Segoe UI Light", &=
quot;Segoe WP Light", "Segoe UI", "Segoe WP", Taho=
ma, Arial, sans-serif; margin-bottom: 12px;">
<a target=3D"_blank" id=3D"LPUrlAnchor131203" href=3D"https://www.mgexp.com=
/article/mg-midget-and-sprite-front-wheel-bearings.271" style=3D"text-decor=
ation: none; color: var(--themePrimary);">MG Midget & Sprite Front Whee=
l Bearings : How-To Library : The MG Experience</a></div>
<div id=3D"LPDescription131203" style=3D"font-size: 14px; max-height: 100px=
; color: rgb(102, 102, 102); font-family: wf_segoe-ui_normal, "Segoe U=
I", "Segoe WP", Tahoma, Arial, sans-serif; margin-bottom: 12=
px; margin-right: 8px; overflow: hidden;">
Here's an interesting thing: there should be no reason why tapered roller b=
earings could not be used in the Midget hub. If the inner bearing that is u=
sed has the necessary 2mm radius to clear the base of the stub axle, and if=
the whole assembly is shimmed properly,
using the spacer between the two bearings (following the MGB shimming proc=
edure).</div>
<div id=3D"LPMetadata131203" style=3D"font-size: 14px; font-weight: 400; co=
lor: rgb(166, 166, 166); font-family: wf_segoe-ui_normal, "Segoe UI&qu=
ot;, "Segoe WP", Tahoma, Arial, sans-serif;">
www.mgexp.com</div>
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</tr>
</tbody>
</table>
</div>
</div>
<br>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<span style=3D"color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,=
sans-serif; font-size: 12pt;"><br>
</span></div>
<div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Spridgets <spridge=
ts-bounces@autox.team.net> on behalf of David Doiron via Spridgets <s=
pridgets@autox.team.net><br>
<b>Sent:</b> Monday, October 25, 2021 10:49 PM<br>
<b>To:</b> Spridgets <spridgets@autox.team.net><br>
<b>Subject:</b> [External] [Spridgets] Roller bearings...again</font>
<div> </div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
>
<div class=3D"PlainText">Dear List, <br>
Every so often the old chestnut of putting roller bearings in the <br>
front hubs of Sprites is resurrected. <br>
Seems like a good idea no? <br>
<br>
NO!!!<br>
<br>
Just saw it again in an article in the November Healey Marque on <br>
converting a Sprite to disc brakes. Here is my experience.<br>
When I changed my Sprite to front disc brakes back in the mid 60s, <br>
I went right out and got the roller bearings and did that conversion <br>
as well. <br>
<br>
And then I broke a swivel axle. "Bad part" I thought, and fitted =
a <br>
new one. Some months later the other side broke. <br>
<br>
Then the old heads at the shop clued me in: <br>
The weak link in the Sprite front suspension is NOT the bearing! <br>
I went back to the ball bearings WITH the correct distance piece, <br>
and have in the following 53 years put a cumulative 450,000 miles on<br>
3 of my Sprites. There have been no further swivel axle failures. <br>
<br>
The "why" goes something like this: <br>
Ball bearings with spacer done up tight give the swivel axle an <br>
effective diameter that includes the inner races as well as the spacer. <br=
>
Roller bearings cannot use the spacer, so the net size of the swivel <br>
axle (read "strength") is effectively less than factory design. <=
br>
<br>
Add to that the age of the parts, the variation in the materials over <br>
the years, and (the biggie) the wider tires used today. <br>
<br>
The risk of breaking a swivel axle is greatly increased with roller bearing=
s, <br>
UNLESS you NEVER drive the car in a Spritely manner! <br>
<br>
In both of the cases where my swivel axles broke, steering became unpredict=
able. <br>
If I had been on a mountain road, or crossed over into opposing traffic, <b=
r>
my fate would have also been unpredictable. <br>
<br>
The original designers at Austin had it right. <br>
<br>
Please call with any questions, <br>
W David Doiron...ex BMC mechanic <br>
602-550-3583<br>
------------------------<br>
<br>
spridgets@autox.team.net<br>
<br>
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