Here is my current planned design for a nice looking functional 50-63mm motor mount.
This is the cover and pulley for 12mm ^ This is the cover and pulley for 15mm ^
22mm Idler for fantastic tooth wrap. Functions for both 12 and 15mm belt.
3d printable motor cover.
Fits Paris and CaliberII trucks.
Motor Pulley: Maximum pulley size: 20T HTD 5M Maximum 17mm thick for 12mm belt Maximum 20mm thick for 15mm belt
Maximum wheel pulley size: 40T HTD 5M Maximum 29mm thick for 15mm belt (from bearing face including speed ring to face of pulley) Maximum 26mm thick for 12mm belt (from bearing face including speed ring to face of pulley)
*This depends on your wheel pulley combo, whether it’s center / off set etc. This dimension is important.
Maximum Can Lengths:
12mm belt with 184mm Caliber: 59mm long 15mm belt with 184mm Caliber: 56mm long
12mm belt with 215mm Caliber: 74.5mm long 15mm belt with 215mm Caliber: 71.5mm long
12mm belt with 180mm Paris: 57mm long 15mm belt with 180mm Paris: 54mm long
12mm belt with 195mm Paris: 64.5mm long 15mm belt with 195mm Paris: 61.5mm long
Maximum Can Width:
50-65mm supported. 30-38mm hole pattern supported.
Fits anything up to 107mm flywheels
Non standard hardware? (doesn’t match above)
You can still use this mount, but it will affect the maximum size of motor that you can use.
The following maximums cannot be changed: Motor pulley thickness Max pulley tooth count Max wheel size
The following maximums can be changed: Bearing to wheel pulley face distance
How does the above affect maximum motor size?
However much your wheel pulley is over the spec will decrease your maximum motor size.
Here’s an example: I’m running 215mm Caliber trucks. I want to use 15mm belt. The spec says that my wheel pulley to face distance must be 29mm thick. My pulley is actually 32mm thick.
Thus: Actual maximum motor size = (71.5mm + (29mm - 32mm)) = 68.5mm
Similarly, the maximum motor size can increase if your pulley width is shorter.
For example, with the same setup except with a 28mm thick pulley: Actual maximum motor size = (71.5mm + (29mm - 26mm)) = 74.5mm
I currently haven’t done all of the calculations. But as of now the maximum length belt that could be needed is 66T for a 20T 40T pulley setup. This accounts for the idler.
Confirmed matching parts: (you can use these and it will definitely fit) Pulleys: buildkitboards.com motor and wheel pulleys Wheels N/A Suspected matching parts: (you can use these and it will probably fit) Pulleys: @dickyho 's motor and wheel pulleys robotdigg 12mm pulley (must use 15mm cover) Wheels Abec style core wheels