MySmartBlinds Replacement Gear
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This is a replacement gear for a 2" window blind motor automation kit
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Model information
- Source
- Printables
- Category
- Other House Equipment
- License
- Creative Commons — Attribution — Noncommercial
This is a replacement gear for a smart blind automation motor. I bought several of these motors and after 5yr the plastic gear inside each has started to disintegrate and crumble. The stacked gears in the motor are mostly metal except for one. The plastic gear is identical in size to some of the other metal ones so i was able to get good measurements for designing a replacement. The manufacturer does not sell replacement parts or even stand alone motors or kits anymore.
The upper gear is so tiny that a 0.4mm nozzle was just not working. I switched to a 0.25mm nozzle and got much cleaner results. Even with the smaller nozzle the inner hole that slides onto the gear shaft was still too rough on the upper portion of the gear so I had to use a 1/16" drill-bit to smooth it out further, just working it through the hole by hand while spinning it with my fingers.
I used PLA for the print and it has been working fine for weeks, but if it does not last I will attempt with Nylon, ASA, or PETG.
UPDATE: I also found that if the tiny gear on the main motor shaft is cracked or damaged, the small top of this gear model works great. The tiny gear on the motor shaft over time will get brittle and crack or just start spinning on the shaft and then the blinds won't fully close anymore. You will need to make the center hole a bit larger with a 5/64" bit, by going through the larger bottom. It worked best by hand as a power drill tends to cause too much damage. The you can just use a small hacksaw against the larger gear to cut off the smaller one. It presses on tightly and seems to work fine.
I also found that it is good to plug in the battery to the motor as you are putting the gears back together. As each gear is added make sure to adjust up/down while holding it all together and makes sure there is good movement without binding. Over-tightening the main screws at the end can cause binding as well.
Moving the blinds to the center position before removing and then marking the top gear position before taking it all apart also helps getting them back together in roughly the same position to make re-calibration minimal.