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04-16-2011, 08:49 PM | #1 |
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Join Date: May 2010
Location: Kalamazoo, MI
Posts: 80
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Rocky Mountain brake drums
Today we had our spring safety check and a couple of the 1931 A's had the Rocky Mountain cast drums in the front. The question among us today was if Ford ever put this type of cast drum on the rear or were they only put on the front.
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04-17-2011, 01:53 AM | #2 | |
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Re: Rocky Mountain brake drums
Quote:
I always thought the name came from the after market rear brakes that were sold to be installed for better "mountain" braking then the "transmission" brake normally on T's.
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04-17-2011, 06:25 AM | #3 |
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Re: Rocky Mountain brake drums
Mike, I'm gonna try to answer part of your questions by what I do know. Yes the drums (both front & rear) were cast. Yes the fronts were spoked but the rears weren't. I can only speculate that the fronts were spoked to aid in cooling but for the rears, due to the design of the emergency brake probably did not lend to being able to use the spoke design on those. The original-style rear cast drums are similar in aesthetics to what the repro cast drums look like however the location of the strengthening rib and it's shape are a little off on the brand of repro drums I use. I have not studied all the other brands in that regard but if you want to get a basic idea, look in the J/S to see a sectional crossview of the original cast rear drum.
I, like Vince don't know where that name came from on those. I suppose it is possible that Rocky Mtn's business had fallen off after Model T sales had dwindled and so they became a vendor to Ford on manufacturing these drums no different than Zenith, Sparton, etc.? I do know that I have looked at several spoked drums looking for a name cast into it and have never found anything. Maybe others have?? . I as |
04-17-2011, 07:13 AM | #4 |
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Re: Rocky Mountain brake drums
Thank you guys!!!
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What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II |
04-18-2011, 07:11 AM | #5 |
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Re: Rocky Mountain brake drums
How can you tell the difference between steel and cast iron brake drums setting side by side?
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04-18-2011, 08:03 AM | #6 |
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Re: Rocky Mountain brake drums
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04-18-2011, 08:45 AM | #7 |
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Location: Kalamazoo, MI
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Re: Rocky Mountain brake drums
thanks guys for sorting this out.
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04-18-2011, 09:51 AM | #8 |
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Re: Rocky Mountain brake drums
The steel drums will have a hollow pocket at the rolled edge, and the cast has a similar shape, but is solid.
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