Rear sprocket 58-62 brake drum and 63-66 brake drum

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ned

Rear sprocket 58-62 brake drum and 63-66 brake drum

#1

Post by ned »

Is the rear sprocket on a 58-62 brake drum the same as a rear sprocket on a 63-66 brake drum.I know that the brake drums are different.
Any help appreciated.
fxe76
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Re: Rear sprocket

#2

Post by fxe76 »

sad to say that those sprockets are not the same -- have looked for suppliers of 58-62 sprockets but none were found -- only why is to order the drum with sprocket attached ---
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Re: Rear sprocket

#3

Post by dereborn »

Hi Ned! Here in Sweden, a big supplier of parts called Bikeline (http://www.bikeline.se" onclick="window.open(this.href);return false;) has a sprocket, with part.nr. 52-147. Costs SEK 550 (about 55 Euro).
Probably cheaper than buying a whole drum.
There is an English version of the website.

Good Luck!
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Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#4

Post by Jonderson »

Ned:

In the US you can order the individual sprockets from http://www.antiquecyclesupply.com" onclick="window.open(this.href);return false; for less than $40. Their catalog lists them as the same, but their price list has them listed separately by part number and price, so I know that they have them.

58-61 is part# 4475 ($38.50)
62-66 is part# 4476 ($31.00)
dj

Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#5

Post by dj »

And.....now antique cycle supply has an on-line catalog just up in the last month or so. I still need to get a hard copy, but this is very convenient.
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Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#6

Post by Jonderson »

Yep, online catalog is cool! You still need to have the price list of course, and I would highly recommend getting a hard copy of the catalog anyway, just for the diagrams if nothing else.
ned

Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#7

Post by ned »

Thanks you for the replies.I was hoping the answer to my question was that both the sprockets were the same.Years back I bought a new sprocket for my 58-62 brake drum,but decided to run a 62-66 set up.A few years down the track the sprocket on my 62-66 setup came loose.Removed the sprocket from the brake drum and compared it to my 58-62 sprocket and they are identical.Both sprockets fit both brake drums.I am really confused.What is the physical difference between the sprockets.Helpppppp!
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Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#8

Post by Jonderson »

I assume that if they both bolt on, that the difference would be either the teeth or the composition. Dunno for sure though.
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Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#9

Post by flatheadDave »

Does any one know the dimensions of the rear brake drums for these years for the big twins? 58-62, and 63-66?

I came across a drum, I was hoping for my WL, but its bigger.

The dimensions for this drum that doesn't fit:
Inside the drum, rim to rim across is 8” wide
1 3/4” were the shoe would ride overall,
and the sprocket is 10 1/2” tooth to tooth,
50 teeth.

If anyone can help me identify this, thanks. !
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Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#10

Post by RUBONE »

That isn't a juice drum, they are cast iron not stamped (except very early '58 which were mostly changed to cast quickly as they discovered stamped juice brakes didn't work). That just looks like a normal 37-57 Big Twin drum. Sprocket would be 51 teeth (they never made a 50).

all BT drums, stamped or cast, mechanical or juice, are 8" with 51 tooth sprockets.

Not sure how you got this in a 16 year old thread..
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Re: Rear sprocket 58-62 brake drum and 63-66 brake drum

#11

Post by flatheadDave »

Thanks, it's probably 51 then, probably just miscounted. I searched "drum", and this thread came up, so I just added to it. Thanks, Ill buy you a beer!
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