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Old 04-25-2017, 04:24 PM   #1
Mike the Grump
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Default Measuring axel and hub wear

I suspect I have a wear issue. I've not pulled the drums/hubs yet. Is there a a way to determine if the axel, hub, or both are worn.

I have new cast drums. I had planned to reuse the hubs but, if they are on the outside edge of serviceable it seems short sided not to replace them.
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Old 04-25-2017, 05:54 PM   #2
1931 flamingo
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Default Re: Measuring axel and hub wear

What makes you think they're worn??
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Old 04-25-2017, 06:39 PM   #3
Tom Wesenberg
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Default Re: Measuring axel and hub wear

I wonder if that's the right nut for the axle?
How close is the drum to the backing plate?
It would be best to remove the wheel and check the condition of the two tapers.
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Old 04-25-2017, 06:45 PM   #4
Big hammer
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Default Re: Measuring axel and hub wear

Isn't he missing a seal under the washer?
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Old 04-25-2017, 06:47 PM   #5
BRENT in 10-uh-C
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Default Re: Measuring axel and hub wear

Quote:
Originally Posted by Mike the Grump View Post
I suspect I have a wear issue. I've not pulled the drums/hubs yet. Is there a a way to determine if the axel, hub, or both are worn.

I have new cast drums. I had planned to reuse the hubs but, if they are on the outside edge of serviceable it seems short sided not to replace them.

Use a bore scope (available for your phone for about $20.00) that allows you to go inside the tapered portion of the hub and check for scoring or galling. If there is, you can use a tapered reamer if you have one to lightly take the high-places out, but for most people, the better solution is to purchase a new hub. And if you have a good axle, you can use Prussian Blue pressure grease to check the fit in the taper.

Also, you need to check the bearing surface of the hub and use a telescoping bore gauge to mic it. Often times, poor (-or lack of) grease causes this to wear which creates a centering issue.
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Old 04-25-2017, 06:56 PM   #6
Art Newland
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Default Re: Measuring axel and hub wear

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I think Tom's correct, that nut doesn't look deep enough.
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Old 04-27-2017, 02:07 PM   #7
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Default Re: Measuring axel and hub wear

Sorry for the delay. Yes, I was viewing the fit of the cotter pin in relation to the castle nut to be a potential sign of wear. It could very well be the wrong nut.

Brent, I appreciate the ideas on how to evaluate it. Had not heard of Prussian blue before.

It may be awhile before I get it apart.

Thank you.
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Old 04-27-2017, 04:00 PM   #8
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Default Re: Measuring axel and hub wear

There are a number of less than desirable rear axle nuts out there in Model A supplier land.

Even Ebay is challenged to provide a sufficiently strong nut.

Fastenal can provide grade 2 and possibly grade 5 in a slightly different style.

https://www.fastenal.com/products/details/0169109?r=~|categoryl1:%22600000%20Fasteners%22|~% 20~|categoryl2:%22600072%20Nuts%22|~%20~|categoryl 3:%22602449%20Castle%20Nuts%22|~%20~|sattr01:^5/8%22$|~%20~|sattr02:^18$|~

We've spoken earlier about getting grade 8 castle nuts - they're available if you buy a box of 500 for considerable cost.

I ended up getting axle nuts from Dorman, who assures me the 5/8-18 nuts they sell are between Grade 5 and Grade 8 (european grading apparently) and probably the equal of original Ford fasteners in this application. (ANSI grading of fasteners had yet to be developed in 1928 and Ford doubtless would consider any nut to be "proprietary" and only to be sourced from Ford Authorized dealers. "Gyp parts" concerns cited.)

Here's the Dorman axle nuts.
https://www.amazon.com/Dorman-814-06...llated+Hex+Nut

If anyone else has a suggestion for quality axle nuts?

Joe K
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Old 04-27-2017, 04:17 PM   #9
john in illinois
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Default Re: Measuring axel and hub wear

This is not traditional. I use grade C steel lock nuts. Very strong. You need to add about 10 ft lbs for prevailing torque from nut.

https://www.grainger.com/product/GRA...op-Lock-26LH33

Original nuts are best,but getting harder to find. I have not found any modern castle nuts that have tight enough threads.

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Old 04-27-2017, 04:19 PM   #10
Tom Wesenberg
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Default Re: Measuring axel and hub wear

That link shows only one left in stock, but at $18.58 for one nut, they might have it in stock for quite a while.
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Old 04-27-2017, 05:06 PM   #11
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Default Re: Measuring axel and hub wear

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Originally Posted by Tom Wesenberg View Post
That link shows only one left in stock, but at $18.58 for one nut, they might have it in stock for quite a while.
Maybe. But that price includes shipping.

Summit Racing does a bit better in price.

https://www.summitracing.com/parts/r...JIwaAhod8P8HAQ

The page header indicates Free shipping on that Summit version - but the web page says "fast" shipping.

I wonder which it is?

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Old 04-28-2017, 06:55 AM   #12
Kurt in NJ
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Default Re: Measuring axel and hub wear

I did some looking, I feel the nut is something in the range or excedes the metric 12.9 rating--
grade 8 ---33-39
grade 12.9===39-44

file will cut below 45-50, file skates without cutting in the 55-65 range
\
original nuts a file won't cut, only very slight scratches so I would say it is over 50, Ford liked to use many different alloy steels and heat treat them, the axle nuts, spring U-bolt nuts---S18, case hardened

just because it is "OLD" doesn't mean it can't be a higher quality steel than is common today, it was a special nut then too


---from old book on banjo rebuilding from the era--
if the wheel bearing surface is scored, pitted or worn in excess of .010 for more than 1/2 the width of the bearing the housing should be replaced
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