From robotics and RC vehicles to automated gadgets and mechanical arms, small motors power many creative builds. But these projects all need one thing: a stable and secure mounting. That’s where a 3d-printed small motor holder makes all the difference.
Instead of improvising with glue or duct tape, 3D printing allows you to craft precision holders that match your motor’s shape, mounting style, and project needs. This article explores how to design and print the perfect motor holders to boost your project’s durability and function.
Why Use 3d-Printed Motor Holders?
Motor holders are small, but critical. Here’s why 3D printing them is a smart move:
- Custom fit: Tailor to exact motor specs (N20, 775, stepper, etc.)
- Modular builds: Create mounts that bolt onto frames or cases
- Reduced vibration: Secure motors minimise movement
- Save time and money: Avoid sourcing speciality parts
- Quick prototyping: Test designs rapidly with your printer
No matter your motor size, a custom holder improves stability, efficiency, and build quality.
Common Motor Types for Small Holders
Design depends on the motor you’re using. Common types include:
- N20 Micro Motors: Widely used in robotics; square bodies
- 775 DC Motors: Heavier, powerful, used in drills and tools
- Stepper Motors (NEMA 17, 14): Used in 3D printers, CNC, and automation
- Servo Motors (SG90, MG996R): RC and robotics applications
Take exact measurements or find datasheets for precise modelling.
Design Tips for Perfect Motor Mounts
Keep these factors in mind when designing:
- Mounting holes: Match manufacturer specs or include slots for flexibility
- Screw slots: Design for M2, M3, or M4 bolts as needed
- Wire clearance: Include space or channels for wires and connectors
- Cooling space: Leave gaps or add vents around high-heat motors
- Alignment tabs: Useful for repeatable assembly and testing
Use Fusion 360, Freecad, or Tinkercad to draw your holders.
Best Filaments for Strength and Fit
Choose the right material for your use case:
- PLA+: Great for most general-use mounts; easy to print
- PETG: Stronger and more impact-resistant
- ABS: Heat-resistant, suitable for motors that run hot
- Nylon or Polycarbonate: For heavy-load or high-vibration systems
Avoid flexible filaments unless your holder needs to dampen shocks.
Print Settings That Work
Get the best strength and accuracy with these settings:
- Layer height: 0.2 mm
- Walls: 3–4 for structural support
- Infill: 40–60%, Grid or Gyroid recommended
- Supports: As needed for overhangs or mounting flanges
- Speed: 40–50 mm/s
- Nozzle temp: 200°C for PLA, 240°C for PETG
- Bed temp: 60°C for PLA, 80°C for PETG
Print orientation matters. Print flat against the bed for stronger layers.
Installation and Mounting Tips
Once your holder is printed:
- Test-fit the motor before final assembly
- Use washers or rubber pads to reduce vibration
- Mount frames with bolts or double-sided tape
- Secure wires with zip ties or clips built into the holder
You can print multiple holders and combine them for twin-motor designs.
Project Use Cases
Printed motor holders are ideal for:
- Arduino robot chassis
- A CNC or laser engraver builds
- Camera sliders or pan-tilt mounts
- RC boats and cars
- 3d printer mods or repairs
You can even design swappable holders for testing different motor types.
READ MORE – 3D Printed Simpal Castle: A Creative Gateway into Fantasy Printing
FAQs:
1. Can 3d-printed holders support heavy motors?
Yes, with high infill, strong materials (like PETG or Nylon), and sound design.
2. Will PLA melt from motor heat?
Not usually. But for hot-running motors, use PETG or ABS for better heat resistance.
3. Are 3d printed mounts strong enough for robotics?
Definitely. With proper wall thickness and hardware mounting, they’re widely used.
4. How do I model a custom holder?
Use CAD software and input motor measurements. Start from a basic bracket design.
5. Can I print flexible motor mounts?
Yes, with TPU. But they’re better suited for shock absorption than firm mounting.
Conclusion:
A 3d-printed small motor holder might be a tiny part, but it’s a crucial one. The right mount ensures performance, safety, and long-term reliability in all kinds of creative projects.
With proper design, filament choice, and print settings, you can create mounts that rival or exceed commercial parts, all from the comfort of your desktop printer.
