Made from a high quality aluminum alloy with fine workmanship and a smooth surface, this component is rust and corrosion resistant, providing a sturdy and durable performance for long-term use. Surface oxidation treatment delivers anti-corrosion and anti-rust protection, enhancing durability in precision transmission applications. It is widely used with 3D printers, CNC machines, stepping motors, and other precision systems. Hole diameter: 14/16/18/19/20/22/24/25/28 mm Outer diameter: approx. 150 mm (5.91 in) Applications and compatibility: - 3D printers: as a mounting hub for motor pulleys or gears, ensuring stable alignment and load distribution. - CNC machines and automation: as a hub for pulleys, gears, or belt drive assemblies that require precise shaft fit. - Robotics and other precision transmission projects: serves as a mounting hub for shafts and rotary components to maintain alignment under load.