Aluminum or Stainless Steel for Motor Structural Components?
A practical comparison for robot, drone and automotive motor housings, covers, shafts and connector parts.
Start with the operating requirement
Material selection should follow load, temperature, corrosion, weight, surface treatment and assembly requirements—not price alone. Aluminum alloys are efficient for lightweight housings, end covers and brackets, while stainless steel is often selected for shafts, sleeves, connectors and wear-sensitive interfaces.
Confirm the complete process route
Review machining allowance, thin walls, thread form, anodizing or passivation, datum protection and final inspection before releasing the drawing. Weko can review the drawing and identify features that may affect tolerance stability or batch cost.