Features Aluminum alloy: Cast aluminium spindle motor is 100% brand new and made of high-quality aluminum alloy. The material is light-sounding, high-strength, not easy to corrode, durable and reliable High precision: The spindle motor mount bracket has a precise manufacturing process, a stable structure, and a non-slip wire design with high precision. Sandblasting treatment: The spindle motor mount bracket is sandblasted to improve the mechanical properties of the workpiece surface, improve the fatigue resistance of the workpiece, make the surface residual stress of the substrate and increase the surface hardness of the substrate Easy to install: Cast aluminium spindle motor is mainly used for engraving, with mounting screws in the package, easy to use and install, it is a good substitute for old parts Size: Aluminum CNC spindle motor diameter is 80mm/3.1inch, the material is aluminum alloy, the package contains 1* CNC motor bracket, 4* screws Features: Cast aluminium spindle motor is made of high quality aluminum alloy, high strength, durable and reliable. Compact size, no scratch, superior performance. Not easy to rust, wear-resistance and corrosion-resistance. High precision dimensional, more stable. Mounting screws are included, easy to use. Specification: Material: Aluminum Alloy Weight: 927g/32.7oz Diameter: 80mm/3.1inch Package List: 1* CNC Motor Bracket 4* Screws Package List