Design of a pneumatic grinding machine and an eccentric circular polishing machine.

【Multifunctional Speed Control, Highly Efficient Work】: This sander features a built-in speed controller with a maximum speed of 10,000 rpm, enabling efficient work for both coarse and fine sanding. 【Eccentric Motion, Highly Efficient Sanding】: The sander operates with a circular eccentric motion with a 5 mm deflection diameter, achieving highly efficient sanding results. The metal housing and powerful internal alloy rotor ensure durability. 【Compact Design, Improved Handling】: Ergonomically designed for comfortable work. This lightweight pneumatic sander with a 5/6-inch housing diameter provides a comfortable grip and allows for easy and precise operation. 【Wide Range of Applications】: Suitable for a variety of materials, including furniture, metal products, painted surfaces and fiberglass, this pneumatic sander is an indispensable tool for coarse, fine and even cutting sanding jobs. 【Convenient Sandpaper Change System】: This pneumatic sander features a self-adhesive frame that makes changing sandpaper and polishing pads quick and easy, saving time when changing jobs. Specifications: Grinding Type: No-Load / Non-Load (Optional) Housing Diameter: 125mm (5in) / 150mm (6in) (Optional) Material: Metal + ABS Threaded Connection: 1/4" Deflection Diameter: 5mm Air Pressure: 0.63MPa No-Load Speed: 10,000rpm Exhaust Method: Rear Exhaust Air Consumption: 0.3m³/min Suction Pipe Length: 1.2m Product Size: 190×165×120mm / 7.48×6.49×4.72in Package Weight: 1400g / 3.08lb Package Size: 23.5×15.5×11cm / 9.25×6.10×4.33in Package Contents: 1 × Pneumatic grinder 1 × Dust extraction hose (1.2 m) 1 × Disassembly key 1 × Dust bag 1 × Instruction manual (English)