CNC Machined 3K Carbon Fiber UAV Drone Arm

Arms carry motor thrust and crash loads, so we keep the cut path continuous around stress areas and avoid sharp internal corners that start cracks. Cutting uses diamond-coated end mills at controlled feed, with the sheet held flat on a vacuum fixture. Motor patterns, such as 16 x 16 mm or 19 x 19 mm, are drilled in the same program as the outline for accurate alignment.

3K twill carbon is the default for arms; thicker sheet raises stiffness and crash resistance at the cost of weight. Arms longer than about 200 mm may benefit from tube construction instead of flat plate, which we can discuss. Edges are chamfered to reduce wire chafing, and optional epoxy edge sealing helps resist splitting. Gloss or matte faces are available.

Hole patterns and arm length are verified on a vision system at first article and spot-checked through the run. Each arm is visually inspected for delamination and voids before packing. Arms can be packed as matched sets so all four or six weigh within a close range. Typical uses include FPV arms, industrial multirotor arms, replacement spares and prototype airframes.