I'm making a ebike with a 350W Unite gear motor. It has an 11mm output shaft with a key, and I am trying to find a freewheel sprocket for it so that the motor won't turn when I pedal. Is there one? I've been searching for a while and can't find one that small.
11mm Freewheeling sprocket?
- Thread starter budabob07
- Start date
rkosiorek
100 kW
closest you will find is one with a 5/8" shaft diameter like this one:
http://www.staton-inc.com/store/pro...de_Adaptor_for_freewheel_sprocket-876-38.html
and add a sleeve to adapt between the 11mm shaft and the 15.875mm (5/8") ID of the adapter. the outside of the adapter is threaded 1.375" X 24tpi for standard freewheels. i would just use a couple of set screws to secure the sleeve to the 11mm motor shaft.
Staton-Inc. also has the same thing with a 7/8" ID. that may be even easier to make if you intend to use keys.
rick
http://www.staton-inc.com/store/pro...de_Adaptor_for_freewheel_sprocket-876-38.html
and add a sleeve to adapt between the 11mm shaft and the 15.875mm (5/8") ID of the adapter. the outside of the adapter is threaded 1.375" X 24tpi for standard freewheels. i would just use a couple of set screws to secure the sleeve to the 11mm motor shaft.
Staton-Inc. also has the same thing with a 7/8" ID. that may be even easier to make if you intend to use keys.
rick
If you want to use a small BMX freewheel, you'll need an adaptor for 30mm x 1mm threads.
DK used to make a 12t freewheel. If you're lucky, you might pick one up secondhand...
ACS Crossfire is available in 13t. https://www.jrbicycles.com/storefront/index.php?act=viewProd&productId=3746
DK used to make a 12t freewheel. If you're lucky, you might pick one up secondhand...
ACS Crossfire is available in 13t. https://www.jrbicycles.com/storefront/index.php?act=viewProd&productId=3746
Would the 13t Odyssey bmx freewheel fit on the sickbikeparts freewheel adapter? On the website of the adapter, it says the threads are 1.37 x 24 TPI. I'd prefer to order from them because I am getting other parts from them as well. Sorry for all the noob questions
rkosiorek
100 kW
13 tooth is dodable using 30mm metric thread adapters. Stanton Inc. also carries these 30mm adapters for a 5/8" axle.
http://www.staton-inc.com/store/products/5_8_ID_Adaptor_for_freewheel_sprocket_13_14_15_tooth_30mm_x_1_0_OD-529-38.html
same deal. you just need a sleeve to adapt it.
Sick Bike Parts only has one that will work down to 16 tooth sprockets.
rick
http://www.staton-inc.com/store/products/5_8_ID_Adaptor_for_freewheel_sprocket_13_14_15_tooth_30mm_x_1_0_OD-529-38.html
same deal. you just need a sleeve to adapt it.
Sick Bike Parts only has one that will work down to 16 tooth sprockets.
rick
Froggy1971
1 µW
- Joined
- Oct 27, 2016
- Messages
- 2
https://electricscooterparts.com/bicyclesprockets.html
13 Tooth Freewheel Sprocket with 11mm Bore Adapter for 1/2"x 1/8" and 1/2" x 3/32" Bicycle Chain
Motor sprocket for MY1018Z and MY1016Z3 gear motors. Right hand thread 13 tooth freewheel. Motor shaft must rotate clockwise to use this sprocket. Includes chromoly steel freewheel sprocket and zinc plated steel adapter. Freewheel is threaded onto the adapter and is replaceable. 2-3/8" (57mm) OD, 11mm ID, 4mm wide x 2mm deep keyway. Works with both 1/2"x1/8" (#410) and 1/2"x3/32" bicycle chain so it can be used with a bicycle rear wheel multi-speed freewheel sprocket or cassette cluster and a derailleur to create a multi-speed transmission.
Item # SPR-B1311FW
13 Tooth Freewheel Sprocket with 11mm Bore Adapter for 1/2"x 1/8" and 1/2" x 3/32" Bicycle Chain
Motor sprocket for MY1018Z and MY1016Z3 gear motors. Right hand thread 13 tooth freewheel. Motor shaft must rotate clockwise to use this sprocket. Includes chromoly steel freewheel sprocket and zinc plated steel adapter. Freewheel is threaded onto the adapter and is replaceable. 2-3/8" (57mm) OD, 11mm ID, 4mm wide x 2mm deep keyway. Works with both 1/2"x1/8" (#410) and 1/2"x3/32" bicycle chain so it can be used with a bicycle rear wheel multi-speed freewheel sprocket or cassette cluster and a derailleur to create a multi-speed transmission.
Item # SPR-B1311FW
Similar threads
