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Old 10-04-2021, 09:33 AM   #1
CA Victoria
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Post Spindle & Drum Combos

I’m sure this has been covered but I could not find the info concerning merging 37-48 drums with spindles.
I have 46-48 drums and 37-41 spindles. Do I need to match like Year drums with spindles in this year range?
Unless I’m missing something, It appears the early spindle axle is to short to fully insert thru the later drum....

Thanks, T.
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Old 10-04-2021, 10:12 AM   #2
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Default Re: Spindle & Drum Combos

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Originally Posted by CA Victoria View Post
I’m sure this has been covered but I could not find the info concerning merging 37-48 drums with spindles.
I have 46-48 drums and 37-41 spindles. Do I need to match like Year drums with spindles in this year range?
Unless I’m missing something, It appears the early spindle axle is to short to fully insert thru the later drum....

Thanks, T.

You've picked a very interesting subject to consider. It is interesting in that no matter we have two distinctly different-looking spindle designs (which we commonly refer to as "Round-back" ('37-'41), and "Square-back" ('42-'48), BOTH are functionally able to accept ANY factory brake drum from 1937 thru 1948.

1937 thru 1939 drums are of the "Wide-five" variety, and 12" in diameter. 1937-'38 drums are CABLE operated, and '39 is the first Hydraulic brake drum, yet all three are dimensionally equitable. All three will bolt-on and function properly on Any '37-'48 spindle.

1940 thru 1948 Drums are also of the 12" variety, and all hydraulically actuated. 1940 & '41 drums actually come from the factory in a couple of different versions (different vertical stampings), but both styles have the HUB manufactured INSIDE the drum. They will bolt-on any 1937 thru '48 spindle. Although these are both REAR drums pictured below, front drums are similar in appearance for the two different versions I speak of ABOVE ....1940 & '41.








1942 thru 1948 drums all look alike, and are 12" in diameter. 1942 thru '48 drums have an easily-recognizable flange/hub assembly which is assembled on the OUTSIDE of the drum. Although the two basic "inside drum/outside drum" designs appear quite different, they are BOTH dimensionally alike, and can be used on any '1937 thru '48 spindle.

There are OTHER differences in spindles between 1937 & 1948 that MAY preclude them being mixed & matched on a particular year front end, but ALL drums will interchange successfully with ALL spindles manufactured 1937 thru 1948. DD
.

.


.
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Old 10-04-2021, 10:13 AM   #3
19Fordy
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Default Re: Spindle & Drum Combos

V8 COOPMAN'S advice is solid gold. Good to know and good to go.

Last edited by 19Fordy; 10-04-2021 at 10:27 AM.
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Old 10-04-2021, 12:59 PM   #4
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Default Re: Spindle & Drum Combos

He's right, of course, but that '40-'41. looks like it has been sitting in a mud puddle for the last twenty years.
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Old 10-04-2021, 01:13 PM   #5
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Default Re: Spindle & Drum Combos

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He's right, of course, but that '40-'41. looks like it has been sitting in a mud puddle for the last twenty years.

Yup....Denny is right! But what is interesting about that pic is that it is only the "cast iron" outer piece of the drum that is eaten-up. The stamped-steel center looks almost perfect. DD


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Old 10-04-2021, 01:36 PM   #6
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Default Re: Spindle & Drum Combos

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First time assembling these parts together. 39-41 spindles & 46 drums.
I’m heading out to pull the drums again but I’m stumped.
I do not have enough thread for the castle nut to seat. Typ nut & washer.
My drum is covering the backing plate with about 1/4” of plate edge showing.
About 1/8 shy.......wrong seal maybe? But the bearings seem like they are seated.....
Checking again........
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Old 10-04-2021, 02:04 PM   #7
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Default Re: Spindle & Drum Combos

Quote:
Originally Posted by CA Victoria View Post
First time assembling these parts together. 39-41 spindles & 46 drums.
I’m heading out to pull the drums again but I’m stumped.
I do not have enough thread for the castle nut to seat. Typ nut & washer.
My drum is covering the backing plate with about 1/4” of plate edge showing.
About 1/8 shy.......wrong seal maybe? But the bearings seem like they are seated.....
Checking again........

OK, do your drums look like this '46-'48 with exposed flange?





Do your spindles look like these "round backs"? DD





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Old 10-04-2021, 04:36 PM   #8
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Default Re: Spindle & Drum Combos

Yup, 37-41s & 46 drums
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Old 10-04-2021, 05:43 PM   #9
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Default Re: Spindle & Drum Combos

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Yup, 37-41s & 46 drums

Look at the spindles in this picture. Pay attention to the SNOUT ....the SHINY part of the spindle where the bearings and seal ride. At the UPPER end just BEFORE the gray round-back, there is a surface slightly larger in diameter that the seal rides upon. This is also the surface that limits the INNER bearing moving inward. Sometimes, you really need to sort of jam the seal onto that surface. Is this possibly why you can't get the drum on the last 1/4" or so? DD


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Old 10-04-2021, 07:14 PM   #10
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Default Re: Spindle & Drum Combos

Thanks DD
So far:
Seal fit is normal
Drum isn’t contacting spindle
Washer fit is normal, no dragging.

Will knock out a seal and inspect inner bearing tomorrow. Visually i can see the radius inside the bearing bore but if it or the race isn't sitting properly it could hold the drum out.
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Old 10-07-2021, 01:59 PM   #11
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Default Re: Spindle & Drum Combos

Hey DD,
I overlooked the obvious!
I removed the hub seal to inspect the components and as I was going thru my box of bearings and seals I found the culprit.....Guess where the difference was...notice the thin axle nut in your photo. I was using the early nuts which are deeper.
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Old 10-07-2021, 09:30 PM   #12
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Default Re: Spindle & Drum Combos

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Originally Posted by CA Victoria View Post
Hey DD,
I overlooked the obvious!
I removed the hub seal to inspect the components and as I was going thru my box of bearings and seals I found the culprit.....Guess where the difference was...notice the thin axle nut in your photo. I was using the early nuts which are deeper.
Ah ....We were just talking about these nuts a month & a half ago while discussing 1936 spindles. "Rich b" had posted these two pictures showing exactly how these early/late nuts can save the day. Glad you worked through your glitch! DD











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