Our Canadian friends at Syncros make a precision built, sealed bearing bottom bracket with a Titanium spindle. The Syncros Pro Series B/B is the more traditional of their two "dual adjusting cup - fixed length spindle" type B/Bs permitting fine lateral adjustments in the spindle for a perfect chainline. The Spindle is machined from Ti 6Al-2Sn-4Zr-6Mo Titanium rod.
The piece is well machined with tapered ends for easy arm installation. Turned on a lathe, the spindle has a flat rise making a shoulder for the bearing cartridge to be pushed against and seat to. The sealed bearing cartridges are machine pressed onto the spindle. After the first bearing is in place, a machined Black plastic water sleeve, slides into place over the spindle and the second bearing is pressed into place. The water sleeve has recessed O-rings at each end that seat into the aluminum bearings cups. Between the two bearings, the spindle is turned to a narrower diameter, reducing its weight. The spindle is drilled through with threads tapped for the crank bolts. Each of the aluminum bearing cups is machined from aluminum rod. The cup piece is bored from the inside so the sealed cartridge butts against the outer cup wall.
On the outside each cup has 6 holes drilled into the surface for a pin spanner to make the final cup adjustments. There is a recess with an O-ring installed where the spindle exits the bearing cup to reduce contaminants from outside. The lockrings for each cup are machined from 3.65mm thick aluminum plate, with 6 cuts for the B/B spanner wrench to grip while tightening. The left lockring is anodized Gold and the right is anodized Black.
The Syncros Pro Series B/B uses French made SKF bearings, model 61903-2RS. It comes with English threads, with spindle lengths of 103mm, 105mm, 107mm, 109mm, 111mm, 113mm, 117.5mm, 122.5mm, 127mm, or 131mm. The weight of Syncros Pro Series B/B 122.5mm spindle is 171 grams. Crank bolts are not included.
Spindle-03-05-07-09-11-13-17-22-27-31/T You need to call for price