link1896
Mr Greenfield
I’ve had a brose mag s apart. Less then 10 hours use on the motor, as the bike was attacked by a metal bar and the frame is trashed.
No wonder these motors don’t last. Hmm.
Uses a 15mm wide, 5mm pitch High Torque Drive (HDT) profile belt. From a google most of the big belt manufacturers makes there super high power Carbon Fibre belts in 8mm pitch at the smallest. So this is a custom belt with Brose’s ID printed on the smooth face that I can just see.
Uses 6807 bearing that’s actually not a 35x47x7 but a 34x47x7 just to fuck with everyone. The rest of the bearings and one way sprag clutches are generic.
The lack of sealing from dust and water is astounding. Did someone miss the “it’s a mountain bike stupid” part of the conversation.
Whoever wrote the cnc code needs a good hard look at themselves; the cutter has started or stopped spinning on the sealing faces. Doesn’t matter, they used a paper gasket anyway.
The machining process after the housing has been cast is on the piss, the spindle is 0.4mm off centre where it exits the housing. This means the bearing seats are all off too. Wall thicknesses are pretty thin to achieve low mass, so this is less then ideal.
The brushless three wire motor uses plastic planetary gears. But pretty much bone dry already for 10 hours of use. The small drive cog is plastic!
The sun gears do have bearings though.
Many mods and improvements possible.
No wonder these motors don’t last. Hmm.
Uses a 15mm wide, 5mm pitch High Torque Drive (HDT) profile belt. From a google most of the big belt manufacturers makes there super high power Carbon Fibre belts in 8mm pitch at the smallest. So this is a custom belt with Brose’s ID printed on the smooth face that I can just see.
Uses 6807 bearing that’s actually not a 35x47x7 but a 34x47x7 just to fuck with everyone. The rest of the bearings and one way sprag clutches are generic.
The lack of sealing from dust and water is astounding. Did someone miss the “it’s a mountain bike stupid” part of the conversation.
Whoever wrote the cnc code needs a good hard look at themselves; the cutter has started or stopped spinning on the sealing faces. Doesn’t matter, they used a paper gasket anyway.
The machining process after the housing has been cast is on the piss, the spindle is 0.4mm off centre where it exits the housing. This means the bearing seats are all off too. Wall thicknesses are pretty thin to achieve low mass, so this is less then ideal.
The brushless three wire motor uses plastic planetary gears. But pretty much bone dry already for 10 hours of use. The small drive cog is plastic!
The sun gears do have bearings though.
Many mods and improvements possible.
