royjr
New member
IMO...
A keyed shaft, A piece of shaft( round bar cold finished steel) with full length milled key way.
Like I said, use 2 collars on each side of the sprocket/brake/wheel hubs(if you can) this will have the best safety factor. Doubling up just helps on the more critical parts(like brakes).
So a steel axle with a keyway along the whole axle. And use locking collars on both sides of each part (sprocket,brake…) to keep it in place. Cool.
For ex. Collars can keep the key in the way with a hub, if the set screws in the hub come unscrewed. They capture the key on both sides of the hub.The key can walk out on you due to vibration or other forces. The hub cannot Rotate with the key inplace. Now this is with regular collars. They're also have keyed collars aswell. They do the same thing just clamp on the key itself.
So its also used as a backup just in case the key slides out, nice. But what about the sprocket, is it held by a hub?, which is set by the key which is again fixed on the axle by the two locking collars on each side?