|
|
|
|
#1
05-16-2019, 04:17 PM
|
|||
|
|||
|
Latest Weight Weenie Foolishness ti brake bolts
Latest Weight Weenie Foolishness
rdf1249@aol.com Here's the front Campy brake from my Raleigh 753. I had already put alloy brake pad holders, alloy adjusters, and alloy nuts all around on it. Now I've made some titanium + alloy center bolts. I got some 6-4 titanium all-thread with rolled threads, and a friend is making me the threaded spring holder bits out of 6061 aluminum. They have little set screws to hold them in place, and I also loctited them. The center bolt alone is 14 grams lighter than the stock steel one (11 vs 25 grams), and now the whole brake is 37 grams lighter than a stock brake. That's nearly 3 ounces off the bike. I'll have the center bolts available soon. In any length. Campy had 3 lengths, but if you need them different you can have them. I'll announce when they are ready. Just waiting for more of the spring holder machined parts from my friend. The alloy adjusters come from Poland via ebay. The alloy nuts come off of old Dia Compe brake pads. The alloy recessed nut is Campy, Good luck finding the alloy brake pad holders. They were from later Super Record brakes. Yes, I could drill out the brake arms, and I could make the QR barrels out of alloy, but I think I'll stop here. Robert D Freeman North Bend WA 
|
|
#3
05-16-2019, 06:13 PM
|
||||
|
||||
|
It's kind of cool in a retro, drillium, weight-weenie sort of way. If guys need to remove the grease from their bearings for a time trial they certainly need some titanium bits.
__________________
You always have a plan on the bus...
|
|
#4
05-16-2019, 06:24 PM
|
||||
|
||||
|
omas sold kits to overhaul your brakes and derailleur hardware like 50 years ago.
|
|
#6
05-16-2019, 08:20 PM
|
|||
|
|||
|
Quote:
|
|
#8
05-16-2019, 08:24 PM
|
|||
|
|||
|
Quote:
Years ago an OMAS bolt snapped on my seatpost. Tossed me to the ground in a (thankfully) pedestrian-speed crash. 
|
|
#10
05-16-2019, 09:20 PM
|
||||
|
||||
|
this is foolish in the best way possible.
__________________
***IG: mttamgrams***
|
|
#12
05-16-2019, 10:30 PM
|
|||
|
|||
|
Quote:
|
|
#13
05-16-2019, 10:32 PM
|
|||
|
|||
|
Quote:
|
|
#14
05-17-2019, 05:07 AM
|
||||
|
||||
|
Club member of ours had pimped his WW bike with CLB titaniums and aftermarket Ti bolts. The threads were cut, not rolled.
Snapped off plain (at the top of the Stelvio, no kiddin - he wasn't downhilling yet, thanks to the gods, just rocking back and forth a bit and playing with the brake lever). There are *high* forces on that bolt, including bending stress. Threaded bolts hate bending stress. Lessions learned: a) It is possible, although not pleasurable, to descend the Stelvio with one rear CLB Ti brake. b) you want that main brake bolt to be from the highest strength and most notch-effect resistent material you can get.
__________________
Jeremy Clarksons bike-riding cousin Last edited by martl; 05-17-2019 at 05:16 AM.
|
|
#15
05-17-2019, 08:16 AM
|
||||
|
||||
|
do it better maybe?
There's the old addage - if it's worth doing, it's worth doing right.
Perhaps to better honor that old tradition, you should use the best processes and inputs reasonably available, as they did back then. If you're substituting titanium for steel in a fastener and the fastener is a component that sees load under safety-critical braking, choosing a simple piece of threaded rod that doesn't even match the original part's diameter where the loads are high is either spendthrift or foolish. The material cost for at least matching the original bolt's diameter, or better yet increasing the part diameter where the bending load is greatest (say from 6mm to 8mm,) would be vanishingly small next to the overall cost of the materials plus machining time.
__________________
. Last edited by Brian Smith; 05-17-2019 at 08:23 AM.
|
 |
|
|
Linear Mode
