Bottom bracket as jack shaft sprocket attachment

enoob

1 kW
Joined
Oct 15, 2009
Messages
414
Location
langley bc .
anyone seen on of these ? im about to go spend some money tomorrow getting one turned out of steel unless this group can steer me in a direction for an off the shelf option.
its aluminum and did not like having a motor drive the sprocket that usually is driven by the pedals. for those that know my motor build thread :twisted: your patience shall be rewarded, this was done by the CC ice at 36v 100a and im working on running the kelly (48v and 200a) this weekend . this is the only part that holds me back .
sprocketholder.jpg


this is how it sits on the BB shaft with the left sprocket to the pedals and the right to the rear tire.
stocksh.jpg


this is how i was going to install a motor driven sprocket. centering it is not a problem and i was just going to run bolts through all 3
shouldwork.jpg

sideview.jpg


anyone know of an off the shelf unit that allows one to fit custom sprockets ? ill even look at a square taper crank if it has room for 3 rings and chain side by side
 
I may not understand the question, but if you are looking for an extra length spindle for square taper cranks, SickBikeParts has a 135 mm and Cyclone has a 159 mm. Eclipse has a 150 mm BB cartridge - jd
 
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