This ball castor can be used as a replacement 3pi robot part or as a general-purpose ball castor. When mounted through a hole in a chassis that uses our micro metal gearmotors and our 32×7mm wheels , as on the 3pi, this ball castor is just the right height to keep the chassis level.
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Our Code: SKU-002441
Supplier Link: [Pololu MPN:957]
3pi ball caster with 1/2" plastic ball, top view with US quarter for size reference
This ball castor can be used as a replacement 3pi robot part or as a general-purpose ball castor. When mounted through a hole in a chassis that uses our micro metal gearmotors and our 32×7mm wheels, as on the 3pi, this ball castor is just the right height to keep the chassis level. The hole for this ball castor in the 3pi chassis has a diameter of 600 mils (0.6") and has a side that is flattened by 30 mils.
To replace the ball castor on your 3pi, you will need to unscrew the rear battery holder (pull off the LCD and remove the batteries to access the screw) and gently bend the holder far enough out of the way to pull out the existing ball castor and slip in the new one. The battery holder is soldered to the 3pi PCB chassis on one side, so you will not be able to fully remove the battery holder. Take care not to lose the plastic spacer that is underneath the holder.
Note: This ball castor does not have mounting holes and includes no mounting hardware or spacers.
Dimension diagram 3pi ball caster with 1/4" ball (bottom view) |
Dimension diagram 3pi ball caster with 1/4" ball (side view) |
| Ball diameter: | 0.5 in |
|---|---|
| Weight: | 2 g |
| Ball material: | plastic |
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