Sunday 19 July 2020

Motor adapter plate co-ordinates

As i already had the adapter plate from the previous conversion, all i had to do was machine the holes for the iMIEVs motor into the plate.

First i measured the distance of all the bolt holes from the shaft and from each other.

Which then meant i could enter it into my CAD program and get the exact co-ordinates of the bolt holes from the center.

The co-ordinates are from top right to top left (clockwise) when looking at the face of the plate
0,0 being the center of the motor shaft
C/B is counter bored 14mm (5mm deep for alignment pins)
format: X / Y ~ hole size in mm

71.95 / 113.4 ~ 11.1mm C/B
107.4 / 0.01 ~ 11.1mm
30.24 / -103.055 ~ 11.1mm
-101.74 / -90 ~ 9mm C/B
-134.4 / 15.225 ~ 9mm
-71.95 / 113.341~ 9mm

The thread for the three 9mm bolt holes is 10x1.25mm. if you are tapping these by hand i would recommend drilling the hole 9.5mm wide as it is extremely difficult to do on a 9mm hole.

note: the pic below has all the X axis co-ords reversed as i had accidentally drawn my CAD upside down, luckily i noticed this before starting the machining process.



Using a 20mm thick adapter plate i still had to use spacers on the bolts that thread into the motor as they bottomed out with about 10mm to go.
Here's the motor bolted up to the transmission

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