45 rear brake cam bearing surface diameter

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thepigstye
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45 rear brake cam bearing surface diameter

#1

Post by thepigstye » Wed Oct 09, 2019 10:44 pm

Anybody got a NOS -41 45 rear brake cam they can measure the diameter? I need to see if this backing plate is worn or the cam itself is worn. The i.d. of the hole in the backing plate measures just under .570. The cam bearing surface only measures .545" It's super sloppy



fenderguitarleo
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Re: 45 rear brake cam bearing surface diameter

#2

Post by fenderguitarleo » Fri Oct 11, 2019 1:46 am

I measured a very good quality new cam I have from 45 Parts Depot and it is .556. My backing plate is about the same as yours .570. There is no replacement bushing for the WLA listed in any parts book. The big twin ones are a different size. Samwel Supply in Europe makes them but he is wholesale only. They have a few vendors in the US that do order from him and it seems Samwel is temporarily out of them as of the beginning of the this year.

Leo
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thepigstye
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Re: 45 rear brake cam bearing surface diameter

#3

Post by thepigstye » Fri Oct 11, 2019 2:01 am

seems like someone would reproduce the cam in .010" over to repair worn holes ???????? They would have to grind them as far, so it would save them time !!!! Guess I'll be machining a bronze bushing to press in there.

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Re: 45 rear brake cam bearing surface diameter

#4

Post by RUBONE » Fri Oct 11, 2019 3:28 am

thepigstye wrote:
Fri Oct 11, 2019 2:01 am
seems like someone would reproduce the cam in .010" over to repair worn holes ???????? They would have to grind them as far, so it would save them time !!!! Guess I'll be machining a bronze bushing to press in there.
Why would they for the minuscule numbers they would sell in a year! Sometimes demand isn't nearly enough to create supply....

thepigstye
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Re: 45 rear brake cam bearing surface diameter

#5

Post by thepigstye » Fri Oct 11, 2019 1:25 pm

What's the difference? It's basically teh exact same part that they are already making, it's less work for the grinder and the maker is there only to make money. People can't buy what isn't available and if it's there, ya never know who will buy it.
That's like saying no one would buy an oversized brake pedal pivot pin, but Colony makes them and I buy them a lot. A new cam is way cheaper than a new backing plate.

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