Originally Posted by
mitchmellow62
So what is that protruding nub of metal? And was it designed to do? Was there another washer under the keyed washer with a small hole to match the nub?
Check out the video I posted above, at about the 2"02' mark. And the pic of the lockwasher, below.
The lock washer lays on top of that race with the pin. The washer has an internal key that engages the steer tube, so that the lockwasher doesn't turn. The washer has 36 holes drilled through it at 10°increments. You preload the race, drop the washer onto the steerer tube and the protruding pin goes through one of the 36 lockwasher holes (with some tweaking, no doubt). This keeps the race from turning.
Given that other, high-quality setups got by with a keyed washer alone, and that the pin/perforated washer setup limits the precision with which one can preload, one asks why the perforated washer and pin was needed. Ingenious, but perhaps engineering overkill? All arguments about engineering elegance aside, I think its an amusing idea.
