The IPM 200-33 AD01 is the electric motor by Dana TM4 used in Kalk and Osa.
Some units may still be branded “Ashwoods”, the brand which became Dana TM4 in 2020).
¶ Specs
The specs below are from the manufacturer.
- Motor: IPM 200-33 AD01
- Voltage: 24-96V
- Peak power: 5-15 KW
- Continuous power: 3-8 KW
- Peak torque: 45 Nm
- Weight: 12kg
- Max operating speed: 7,000 RPM
¶ Variants
Although this motor is used on both Kalk and Osa, the Kalk uses the IP 25 version and the Osa uses the IP 65 version. The Kalk motor has "air intake" slots around the motor, presumably for better cooling allowing for more power (source: Discord).
| Kalk | Osa Flex | Osa+ |
|---|---|---|
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¶ Notes
- The motor spindle is machined into a 16/20mm spline pattern (source) to accept CAKE front sprockets, as can be seen in the teardown photos below.
¶ Resources
¶ Teardown
A good teardown of this motor can be seen in Dustin's awesome post in the Kalk owners FB group. They stripped their motor shift so had it machined for a different fitment, and upgraded the bearings while the motor was apart. A subset of Dustin's images are shown below, but their full FB post is worth checking out here.
