Re: Brakes: changing from nutted to recessed?

bjw@xxxxxxxxxxxxxxxxx wrote: 
Phil, Squid-in-Training wrote:


No it's not.  But it's still bad design.  If the engineer specs a set of
brake caliper bolts on a car that are undersized, cut, or whatever, the
results could be grave.  How can a low-cost modification that, according to
the principles of physics, not be recommended?  Hint: forward-facing
dropouts.

The benefits outweigh the costs.  Although I don't have any data backing up
costs of rolling versus cutting, I'm betting that with the vast majority of
bolts in general being rolled, the additional cost is almost nothing.



Dude,

You and jim beam are changing the subject.  Read the original post.
The question was not, Should bike designers design brake bolts
that are rolled or cut-thread?  Nobody really disputes that rolled
is better, the only disagreement was about how much.  The original
question was, Can an individual rider use a die to cut 5mm more of
threads on a rare, trick-part, long out-of-production brake so that
it is usable?  jim's answer was that the sky will fall if you do that.
The dispute is over whether the sky is falling.

rolled thread bolts are generally not the same steel at that used for any responsible cut thread bolt - it's cheaper/weaker material because the better properties of the rolled thread allow it to be used. /so/ cutting a thread into a rolled thread bolt is bad not only because of the cut thread, it's bad because the material is not appropriate for it! it this really so hard to understand?
.

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