Line hanging working speed V of several concepts operating speed refers to the crane working body stable operation at rated load speed. 1. Lifting speed Lifting speed Vq means crane in a steady state 10 tons of line hanging, vertical displacement speed of the rated load, in units of m / min. 2. Crane Crane speed Vk speed refers crane on a level surface or orbiting speed load ratings of units of m / min. 3. Car speed car speed Vt refers to a stable state of motion, the car on a level track speed load ratings of units of m / min. 4. Luffing luffing speed V1 speed means stable small line hanging down motion, suspended in a minimum rated load luffing plane, from the most significant to the horizontal displacement of the minimum amplitude of the average line speed in m / min. 5. Walking speed V. Walking speed refers to the road status, mobile cranes hanging steady speed rated load, in units of km / ho 6. Ω is the rotational speed of the rotation speed of motion refers to a stable state hanging downward travel, the rotational speed of the crane about its center of rotation, the unit is r / min. Line hanging bearing rust treatment if the bearing line hanging on a rusty can apply anti-rust oil using a method commonly used immersion, brushing, spraying. Prior to apply anti-rust oil to the bearing surface must be clean, rust-proof surface depending on the nature and the prevailing circumstances, should select the appropriate cleaning method. Generally the most commonly used method of mechanical cleaning, chemical treatment and solvent cleaning method cleaning method. The surface to be cleaned in dry air or dry with a clean gauze. When bearing immersion method, a number of small items should be soaked in anti-rust oil, allowed to adhere to the surface of the layer of rust oil method, whereby the film thickness can be controlled by anti-rust oil temperature or viscosity to achieve. Line hanging five tons | generous heavy (certified) | Huainan line hanging by heavy machinery Co., Ltd., Henan Province, generous. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) is Zhengzhou, engineering, construction cranes leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. In heavy generous leadership with the staff warmly welcome all inquiries negotiations to create a better future for heavy generous.