Concrete Floor Grinder Features: 1. The pure copper motor is of high quality and the product is sturdy and durable. The new statorand rotor of the motor can easily realize the conversion of electrical energy and mechanical energy. 2.Diamond chassis is sharp, hard, wear-resistant, work efficiency and high quality. 3.High performance, stable life, long service life. 4.Highly adaptable cement floors can also be fully hardened and work can be done at the root of the wall. 5.With dust suction fan, dust-free operation. 6.The machine has no plug, please connect it to the air switch when using it. ? Parameter: Grinding Width: 400mm Working Speed: 720r/min Voltage: 220V Power: 4kw Fan Power: 0.75kw Maximum Airflow: 180mm/h Maximum Pressure: 220mbar Dust Loading Capacity: 24L ? Detail: High-efficiency filter element to better protect the fan. Enlarged dust bin for dust storage. Variety of grinding heads available. Aviation plug, plug and play. ? Give away 5 meters of wires. The maximum length of the machine can be connected to 90 meters of wires. The specification is three-core wires. Each wire should not be less than 6 mm of pure copper wire. The wire must be connected to the air switch, and the rated current of the air switch is about 63A. As shown in the picture of wiring mode, please contact us if you have any questions. Precautions For Use: 1. The input voltage should not be too low. 2. When using, first lift the machine head off the ground,and then turn on the switch. When the machine head rotates normally, gently place it on the ground. 3. When working, the machine head swings left and right, then moves forward, and cannot stop in place. 4. In case of power failure during operation, the switch should be reset and cannot be stopped at the original position to avoid burning the motor when the power is on. 5.If a generator is used to provide power, the output power of the generator must be at least 12KW. Notice:Dust baffle for chassis, random shipment,based on the received goods. Item Number: Concrete Floor Grinder 239509 You can make order with no worries. Any concerns just feel free to let us know, we'll reply in 24 hours in normal condition. Handling Time: Shipping is usually made in 1-3 business days after payments cleared. Orders are processed from Monday-Friday; Not on the weekends public holidays. Warranty: 6 months' warranty for the machines, not for the consumables. We stand behind our products all the item, so even if your warranty period has expired, you can still seek for service or technical support from us with low cost.