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Old 10-21-06, 10:26 PM   #1
ewh
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help! corrosion on brake-line cable-stop

This completely sucks. I am replacing brake cables for the first time on one of my bikes, and I noticed some corrosion in the inside of a cable-stop (the part of the stop which the ferrule contacts). Due to the small amount of corrosion (it's white colored, not rust colored), a new ferrule won't fit into the stop. What types of metal are cable-stops typically made out of? Is there some chemical I can use to eat away the corrosion, or should I try to somehow sand it out? If I'm going to sand it out a bit, I wonder how I'm going to get some abrasive object into the small diameter of the stop.

Any suggestions would be appreciated.

Thanks much!
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Old 10-22-06, 05:29 AM   #2
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Dremel's 1/8" Bristle Brush dipped in polishing compound. If that doesn't work, try Dremel's 1/8" Brass Brush Accessory Bit, or as a last resort, Dremel's 1/8" Carbon Steel Brush Accessory Bit. I'd probably just use grease to inhibit corrosion in the future.

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Old 10-22-06, 12:43 PM   #3
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Thank you!

I have never used a dremel before, but someone gave me one as she didn't need it anymore. This is perfect! I'll order the attachments and polishing compound and experiment!

Thanks.
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Old 10-22-06, 02:46 PM   #4
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Doesn't particularly have to be a Dremel, but whatever.
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Old 10-22-06, 09:03 PM   #5
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Quote:
Originally Posted by Ornery
Whoa; a cheap copy of my Fordham!
Pretty good price, too; of course, I've been using mine for almost 30 years...
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Old 10-23-06, 07:02 AM   #6
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Not that I want to deter you from getting a new tool, but I can usually clear a cable stop just by spinning a drill bit held between my fingers. It's easier than using a power tool, especially in those spots were the cable stop is brazed to a frame tube.
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Old 10-23-06, 06:37 PM   #7
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You could possibly get the job done with a Q-tip and chemical cleaner. Trick is removing the corrosion without hurting the paint.

I worked at a machine tool building shop for 25 years, until it went out of business. We had a Foredom cable grinder for all those years, and it was used a lot. At an auction for all the building's contents, it went for $40.00! A pile of $36,000.00 worth of bearings went for a few grand.

I'd buy that Foredom knockoff if I didn't already own a wondrous Dremel tool.

They are pricey little buggers, especially the 1/3 HP puppies!

Last edited by Ornery; 10-23-06 at 06:47 PM.
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Old 10-29-06, 11:25 AM   #8
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Actually passing some relatively fine steel-wool back and forth through the cable-stop cleared out the corrosion really nicely.

Thanks for all of your replies!
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Old 10-29-06, 12:23 PM   #9
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Ah, "Yankee" ingenuity!
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Old 10-29-06, 05:10 PM   #10
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Um, actually, the suggestion to use steel-wool came from someone born and raised in southwestern Virginia. Ya can't win 'em all!

Cheers.
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Old 10-29-06, 06:14 PM   #11
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White corrosion means the part is probably aluminum. You could also try using lime and mineral deposit cleaner that is used for cleaning out plumbing like CLR.

Aluminum oxide can be a bugger to remove mechanically by polishing. You might have to use a sharp pointed object like a box cutter and an ice pick to scratch it off.
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