UH1-75 Simucube 2/VRS/Mige Hub/extension/70 PCD adapter

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UH1-75 is a direct replacement to the stock hub that comes with all three models of the Simucube 2 family of direct drive base systems and also for VRS/Mige servos with the addition of the optional drivelock accesory.

It adds 75mm extra length to the stock hub and with smaller diameter is the perfect add-on in order to extend the motor shaft and give enough room and clearense for you center monitor in order to be as low as possible and to bring it closer to the servo axle.

Total lenght 125mm from the front face of the servo.

At the same time it is compatible both with the stock Simucube 2 quick release and also with any 70 PCD quick release on the market,

Both the stock SC2 QR and the 70 PCD holes are threaded M5 so no need for ugly nuts.

The UH1-75 is also compatible with out ProXT modular extensions for those that need more than 75mm extra length.

See this great video from Greg at GTGreg on how to install the UH1-75.


If you are having problems unlocking the drive lock that holds the shaft use one of the 4 M6 bolts in one of the 2 threaded holes circled in red in the picture below, once it bottoms out half an extra turn clockwise will unlock it. We suggest to leave a 5mm gap from the servo frame when installing the UH1 to avoid rubbing.


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  • 5
    Very nice

    Posted by Shane on 22nd Apr 2021

    I recently purchased the UH1-75 to replace the sleeve and extend the shaft on my SC2. It looks super clean. It’s easy to install. There’s a simple trick to removing the stock SC2 sleeve on the shaft so check it out in the manual first. I also added a 50mm gold ProXT to the UH1-75. Looks dope! Thanks SimCore.