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Chorus campagnolo adjuster screw ?

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Chorus campagnolo adjuster screw ?

Old 10-07-15, 04:51 PM
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pinch1967
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Chorus campagnolo adjuster screw ?

I have chorus rear derailler and the cable adjuster screw is broken in half . since its campagnolo will any other derailleur screw work .Thanks for any info .
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Old 10-07-15, 06:03 PM
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Depending on the screw's diameter, thread pitch, length, head and/or shoulder design. Then with the cable adjuster aspect added in, the interface with any other elements like a spring and or a spring plate and it's need for a flat on the adjuster's thread.

The easy answer is try and find out. The thread is, IIRC, a M5. This is a common one for der adjusting barrels (and these are not usually called screws). Many versions of Campy and Shimano share this thread spec but maybe not the rest of the picture. Andy.
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Old 10-07-15, 11:12 PM
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Originally Posted by pinch1967 View Post
I have chorus rear derailler and the cable adjuster screw is broken in half . since its campagnolo will any other derailleur screw work .Thanks for any info .
If what you have/find doesn't work, perhaps you could take the broken pieces to your local machine shop that makes bolts, screws, etc. They can measure all the particulars that Andy mentions. If they don't have exactly what you are looking for, they might just be able to make it...and it will probably cost less than $1.
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Old 10-08-15, 10:17 AM
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check amazon, that's where i got mine
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Old 10-08-15, 10:19 AM
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Originally Posted by pinch1967 View Post
I have chorus rear derailler and the cable adjuster screw is broken in half . since its campagnolo will any other derailleur screw work .Thanks for any info .
It depends on the year / number of sprockets the RD is designed to work with but it's basically simple - the following is, without getting bogged down too far, generally true ...

Older Chorus RDs, 9s, with a Shimano-style "B Screw" adjuster against the rear gear hanger, used a standard M5 x 0.8 mm thread adjuster, Campag part number RD-AT115.

More recent, 10s Chorus RDs, with the distance from top jockey wheel to biggest sprocket set with the "H Screw" on the jockey cage pivot, used a finer threaded M5 x 0.5 mm thread adjuster. The part number is either RD-DA004 for a functional but not very pretty adjuster, or RD-SR014 for a much nicer polished steel one that is comparatively expensive but less likely to fail.

By "older" I mean up to 2001 or thereabouts - by "newer, I mean since 2001.

HTH
Graeme
Velotech Cycling Ltd
UK Main Technical and Service Centre for Campagnolo since 2008.
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