Can molded propellers be balanced well enough?
Yes, when every blade fills and cools the same way. A centered gate at the hub and a balanced tool layout make the blades consistent from shot to shot.
Industry
Injection Molding for Drones
Every gram on a drone costs flight time, and every drone eventually hits something. The molded parts have to be light enough to fly and tough enough to be flown again.
After a crash
What breaks first, and why that is by design
Good drone designs decide in advance which parts fail, so the expensive ones survive.
- 1
Propellers
The first thing to touch a branch or wall. They are meant to be cheap to replace, so they break before they pass the shock to the motor.
- 2
Landing gear
Takes hard landings. Often a separate, replaceable part that flexes rather than cracks.
- 3
Arms
Carry the motors and take a hit when the drone tumbles. Folding arms add a hinge that must survive the same hit.
- 4
Gimbal and camera covers
Protect the most expensive part on board. Tough, clear, or tinted resins keep the lens safe.
- 5
Battery latch
Must hold the battery in a crash. A battery that ejects mid flight is worse than any broken part.
Resin by part
Where each resin goes on the aircraft
Stiffness where it flies, toughness where it lands.
| Part | Needs | Common resin |
|---|---|---|
| Arms and center frame | High stiffness for its weight | Glass or carbon filled nylon |
| Propellers | Stiff blades that stay balanced | Glass filled nylon |
| Top and bottom shells | Light, good looking, easy to paint or print | PC/ABS or polycarbonate |
| Landing gear and bumpers | Toughness, bends rather than snaps | Unfilled nylon or TPU |
| Battery shells | Impact protection and a flame rated grade | Flame rated PC or PC/ABS |
Weight
Saving weight without losing stiffness
A flexing frame shakes the camera and confuses the flight controller.
- Hollow or open section arms carry most of the stiffness of solid ones at a fraction of the weight
- Fiber filled nylon lets sections be thinner, but fibers follow the flow, so the gate is placed to align them along the arm
- Motor mounts need stiff, flat seats so vibration does not reach the flight controller and camera
- Merging brackets, clips, and cable guides into the shell removes screws, and screws are heavy
FAQ
Questions from drone makers
Can spare parts be sold separately?
Yes. Props, landing gear, and arms are often sold as spares. There is no minimum order quantity, so spare runs can be small and frequent from the same tools.
Can the whole set of small parts come from one tool?
Often. A family mold can produce related small parts, such as clips, covers, and feet, together in one shot.
Who owns the tools?
You do. The customer owns the tool once the tooling charge is paid, and can request it at any time.
Keep reading
Related guides
Frames, fiber filled resins, and battery parts.
Drone frames
The frame as a single part.
Drone framesGlass filled nylon
Arms and props.
Glass filled nylonPC/ABS
Light shells that paint well.
PC/ABSBattery housings
Cells protected in a crash.
Battery housingsBattery systems
Packs, modules, and chargers.
Battery systemsCoring out
Taking weight out of thick sections.
Coring outIndustries hub
Every sector page in one index.
Industries hubNext step
Send the airframe with its weight target
Upload CAD with the weight budget and which parts are meant to break first. DFM checks fiber direction in the arms and balance on the props. NetProto manufacturing is ISO 9001 certified.