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Unread 13-05-2015, 13:15
Knufire Knufire is offline
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Re: pic: Manually machinable one-speed gearbox

Quote:
Originally Posted by asid61 View Post
I think it's because it's a double sprocket, and 16t double sprockets are unknown to me.
With two bearings directly pressed into 2x1x.125 tube, you have 0.5" of shaft space left. The 221 17T double sprockets are .43" wide, while two 16T single sprockets are .7725" wide. If you want to use the 16T sprockets, there are a bunch of easy solutions, such as adding some 1/8" plates on the outside of the tube to space the bearings out, etc. However, IMO, the convenience of having less pieces to pull the shaft through during assembly is worth it.

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