ColsonTwinbar
New Member
Hey Everybody,
I'm a longtime member but haven't posted in a few years.
Heres a project I started on a few months ago (yes it has been going very slow) and is now finally starting to get interesting so I though I would share.
I first gathered all the components I had and reverse engineered the thing in solidworks. Which i know is kinda ridiculous but it was a rainy winter up here.
This helped me finalized the modifications I needed to make before I destroyed a few hard to find parts. as well as help me engineer the 3.5 inch pulley that I would need to have made (the larger red component). This will be keyed into the planetary gear drive and ride on a good sized shielded bearing. It is currently just a 3d printed part but will have it turned in aluminum.
I used the guts from a bendix manual 2 speed hub http://www.trfindley.com/fl_bike_pages_pics/bndxmsptlst.jpg
and modified the component that has the three planetary gear axles by cutting off the helical square thread section and grinding down the bearing race. I also shortened the axle and cut the threads where i needed them. For the ring gear/sprocket component I removed the teeth of the sprocket and tack welded it a modified 4.5 inch lawn mower v-belt pully. Reducing this pulley size will give me a slightly higher gearing than the original 5 inch pulley when in my high gear (1:1) while having a decent lower gear to work with.
I'm a longtime member but haven't posted in a few years.
Heres a project I started on a few months ago (yes it has been going very slow) and is now finally starting to get interesting so I though I would share.
I first gathered all the components I had and reverse engineered the thing in solidworks. Which i know is kinda ridiculous but it was a rainy winter up here.
This helped me finalized the modifications I needed to make before I destroyed a few hard to find parts. as well as help me engineer the 3.5 inch pulley that I would need to have made (the larger red component). This will be keyed into the planetary gear drive and ride on a good sized shielded bearing. It is currently just a 3d printed part but will have it turned in aluminum.
I used the guts from a bendix manual 2 speed hub http://www.trfindley.com/fl_bike_pages_pics/bndxmsptlst.jpg
and modified the component that has the three planetary gear axles by cutting off the helical square thread section and grinding down the bearing race. I also shortened the axle and cut the threads where i needed them. For the ring gear/sprocket component I removed the teeth of the sprocket and tack welded it a modified 4.5 inch lawn mower v-belt pully. Reducing this pulley size will give me a slightly higher gearing than the original 5 inch pulley when in my high gear (1:1) while having a decent lower gear to work with.