Overview
The NEMA 17 L-Shape Mounting Bracket is a high-strength alloy steel mounting plate designed to securely fasten standard NEMA 17 stepper motors to your 3D printer frame or CNC chassis. Featuring a precision-stamped $90^\circ$ bend and integrated welded support gussets, this bracket eliminates flexing under high torque load. The pre-cut slots allow for easy adjustment of belt tension, making it an essential hardware piece for custom Prusa, CoreXY, or DIY CNC builds.
Key Features
Heavy-Duty Construction: Made from high-grade 3mm thick alloy steel to withstand intense motor vibrations and torque without bending.
Precision Fit: Custom engineered for standard NEMA 17 motor faceplates ($31\text{mm}$ hole spacing).
Adjustable Slot Design: Wide mounting slots let you slide the motor back and forth to fine-tune timing belt tension perfectly.
Anti-Rust Coating: Finished with a matte black powder coat or plating to resist oxidation and wear in workshop environments.
Technical Specifications
| Feature | Specification |
| Compatible Motor Size | NEMA 17 (42 mm times 42 mm base) |
| Material | Alloy Steel / Aluminum (3mm Thickness) |
| Angle | 90^circ Precise Vertical L-Shape |
| Finish | Matte Black Powder Coated |
| Base Mounting Holes | M4 / M5 Slots (For 2020 Alum Extrusions) |
| Motor Mounting Holes | M3 Pre-drilled Slots |
| Dimensions | Approx. 50 mm times 50 mm times 52 mm |
Perfect For:
3D Printers: Upgrading or building custom X/Y/Z axis motor mounts on V-Slot aluminum profiles.
CNC Routers: Mounting driving motors to lead screws or belt pulley systems.
Robotic Arms: Creating rigid structural joins between joint motors and chassis frames.


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