My single reduction mid drive is working very well with 10:1 reduction using #25 chain. However, I can't leave well enough alone, and I'm curious to see if a belt drive might work.
https://endless-sphere.com/forums/viewtopic.php?f=28&t=96769&p=1426882#p1426882
Here are the design parameters:
At least 10:1 reduction ratio
450 Watts at 60 RPM Cadence, which works out to about 175 lb belt tension. (May be able to reduce watts/tension just a bit...)
7.2" max pulley diameter
.575" large pulley width, so 1/2" wide belt (Maybe 15mm with large effort)
Dust for sure, and possibly dirt.
Up to .010" radial runout on large pulley
Prefer not to use an idler/tensioner, or crazy high tension
I would appreciate any suggestions on design guides, sources for pulleys & belts (off the shelf and custom...), and general thoughts.
I took a quick look, and it appears that this is a difficult application for a belt. However, the E-Skateboard guys seem to make belts work with even larger motors. I'll probably also post over on www.electric-skateboard.builders. They have cool stuff...
https://endless-sphere.com/forums/viewtopic.php?f=28&t=96769&p=1426882#p1426882
Here are the design parameters:
At least 10:1 reduction ratio
450 Watts at 60 RPM Cadence, which works out to about 175 lb belt tension. (May be able to reduce watts/tension just a bit...)
7.2" max pulley diameter
.575" large pulley width, so 1/2" wide belt (Maybe 15mm with large effort)
Dust for sure, and possibly dirt.
Up to .010" radial runout on large pulley
Prefer not to use an idler/tensioner, or crazy high tension
I would appreciate any suggestions on design guides, sources for pulleys & belts (off the shelf and custom...), and general thoughts.
I took a quick look, and it appears that this is a difficult application for a belt. However, the E-Skateboard guys seem to make belts work with even larger motors. I'll probably also post over on www.electric-skateboard.builders. They have cool stuff...