Re: Brakes: changing from nutted to recessed?

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.

bjw@xxxxxxxxxxxxxxxxx wrote: 
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.

I have done that many times without a single incident. Emery the chrome away before starting your die and use cutting oil. Put a cone wrench in the spring slot and hold the bolt/cone wrench in a vise. That's the best setup I've found.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
.

Relevant Pages

  • Re: Brakes: changing from nutted to recessed?
    ... But it's still bad design. ... > The benefits outweigh the costs. ... > bolts in general being rolled, the additional cost is almost nothing. ... Should bike designers design brake bolts ...
    (rec.bicycles.tech)
  • Re: Brakes: changing from nutted to recessed?
    ... brake caliper bolts on a car that are undersized, cut, or whatever, the results could be grave. ... The benefits outweigh the costs. ... 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. ...
    (rec.bicycles.tech)
  • Re: 2000 Echo-time to buy a new car???
    ... Replaced power steering fluid ... fluid - accomplishes the exact same thing and costs $100 less. ... Adjusted brake cable, cleaned rear brakes ... And the little bottle of windshield washer solvent concentrate ...
    (alt.autos.toyota)
  • Re: WTB front wheel
    ... Yeah, yeah, I covered that in my followup post. ... I don't see any pitch bolts, and I also don't know what the bolts on ... Here's the original front Triumph wheel, the axel is shorter than 8", ... right, and in the picture you can see the drum brake it used, 4 shoes in ...
    (rec.motorcycles.harley)
  • Re: Question about torque
    ... The 18mm bolts seemed to have some old locktite on the threads, ... No mention of thread locker is used in brake pad replacement. ... Battery Retainer Nut Screw ... Park Brake Lever Assembly-to-Floor ...
    (rec.autos.makers.saturn)