Cold-Formed Aluminum Alloy Drive Bolt for Lightweight Assemblies
This drive bolt is fully cold-formed from high-strength aluminum alloy, producing a fiber-flow microstructure that raises fatigue life in dynamically loaded joints. The shank is straightness-controlled so the bolt seats true in aligned pilot holes — a key requirement for motor assemblies, gearboxes and precision housings where run-out directly affects noise and vibration.
The drive interface is formed, not machined, keeping cost low while maintaining stable torque transfer. Because the fastener is aluminum throughout, it is galvanically compatible with aluminum housings: no dissimilar-metal corrosion cells, no need for insulated washers.
Typical uses include electric motor assembly, drive units for embodied-intelligence robots, lightweight transmissions, drone and low-altitude aircraft powertrains, and aluminum-structure frames in new-energy vehicles.
