Ender 3 v2 Doube Shear Y Motor Mount

This is a pretty simple Y axis mod to add support for dual shear, meaning the motor mount supports the motor shaft from the unpowered side. I also unintentionally found this mod adds support for slightly longer motors, especially if you switch your bed leveling screws out for ones with a smaller diameter. I found that ~48mm is the longest motor that'll fit; anything longer, and it'll hit the power supply.

I generally found I can run the Y axis at 250mm/s with 15k mm/s^2 accelerations. In theory, I've minimally tested 500mm/s, but my extruder cannot reach those speeds reliably.

This should really be printed in atleast PETg for the heat resistance, but if you use a longer motor, they tend to stay cooler. Mine was printed out of PLA, and so far it's fine with the new 47mm motor, but the stock motor would've melted the mount by now.

In terms of hardware, you'll need the following (These are just examples, pretty much the first correctly sized listing I found):

• 1 F695-2RS flanged bearing

  • https://www.amazon.com/uxcell-F695-2RS-Bearing-5x13x4mm-Bearings/dp/B085DSBLTM

• 1 20T idler

  • https://www.amazon.com/Onyehn-Timing-Bearing-Suitable-Printer/dp/B07J4JC2N7

• 1 M5x40 to M5x40 screw & nut/locknut (Doesn't need to be precise)

  • https://www.amazon.com/BNUOK-Socket-Washers-Threads-Spanner/dp/B0F99L3KPF

• 4 M5x12 flat/button head screw

  • https://www.amazon.com/Furniture-Stainless-Coating-Screwdriver-Included/dp/B0D35KN1G9

• 4 M3x4x5 heatset inserts

  • https://www.amazon.com/Threaded-Inserts-Soldering-Printed-Materials/dp/B0D7M3LJD

• 5 M3x8 screws

  • https://www.amazon.com/Socket-Screws-Bolts-Thread-100pcs/dp/B07CMQ1SQH

• 3 M3x30 screws

  • https://www.amazon.com/Socket-Screws-Bolts-Thread-100pcs/dp/B0FLKC8Q84

• GT2 Belt

  • https://www.amazon.com/Upgrade-Non-Slip-Version-Printer-Printers/dp/B08R93QQ8Z

Any feedback or comments would be greatly appreciated! I've been using this setup for a few weeks, and it seems to be working extremely well, but that doesn't always mean that the design is the best it can be.

This project was made with Onshape! https://cad.onshape.com/documents/1d34d0e9ffccfa0f828d84f9/w/8dd639980c6fac81997c509f/e/a533f87c740560fba4e48c3f?renderMode=0&uiState=6960f6d1a87ef1c9c87807c5