Double Shear Addon for Sovol SV08 CNC Gantry Kit
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Add dual support for the shaft of SV08 AB steppers using 625ZZ bearings for improved rigidity under tension.
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This Double Shear Addon is designed to upgrade the Sovol SV08 CNC Gantry Kit by adding rear shaft support to the AB stepper motors. Using 625ZZ bearings, the motor shaft is supported on both ends, preventing flex when belts are tensioned or during fast accelerations.
This improves rigidity, reduces wear on the motor bearings, and increases long-term reliability — ideal for high-speed or high-precision setups.
| 👉 Don't have the CNC Gantry Kit yet? You can get the official Sovol SV08 CNC Machined XYZ Kit designed by Nadir here: 🔗 Buy from Funssor |  |
✅ Bill of Materials (for both sides — left & right):
2× 625ZZ bearings (one per side)
https://amzn.to/43xhWcu
https://s.click.aliexpress.com/e/_oot3Xuo
6× M3x35mm bolts (replaces existing M3 bolts that hold the steppers)
https://s.click.aliexpress.com/e/_oD3OvC0
https://amzn.to/4mJpekJ
Stepper motors with shaft length ≥35mm, such as:
📦 Good news for US users:
We partnered with KB3D, a trusted supplier stocking high-quality LDO motors with 35mm shafts, ready to ship!
🌀 Tested with:
✔ LDO 42STH48-2804AH (S55) – AliExpress
Check these out (these are affiliate links — by purchasing through them you also help support our work):
🔗 LDO NEMA 17 42STH48 2504AH S35 – High Temp, Super Power
https://kb-3d.com/store/stepper-motors-servos/2603-ldo-stepper-motor-high-temp-nema-17-42sth48-2504ah-s35-speedy-power-1651971790698.html?affp=30949
🔗 LDO NEMA 14 35STH52 2004AH S35
https://kb-3d.com/store/stepper-motors-servos/4479-ldo-stepper-motor-nema-14-35sth52-2004ah-s35-1723662613552.html?affp=30949
🔗 LDO NEMA 17 42STH48 2804ACS35 Super Power
https://kb-3d.com/store/stepper-motors-servos/1380-ldo-stepper-motor-nema-17-42sth48-2804acs35-super-power-1723665948119.html?affp=30949
🔗 Amazon Option (affiliate) – Confirm shaft length before purchase!
⚠ Other options (not tested):
🔗 AliExpress Option
🖨 Print Settings:
Material: PETG, ABS, ASA or stronger — do not use PLA
Layer Settings:
Infill: 20%
Top layers: 5
Bottom layers: 5
Walls/perimeters: 4–5
Supports: ❌ Not needed
Orientation: ✅ Parts are pre-oriented for optimal printing
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