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 The so-called dry-type smooth, such as between two rough appearance to participate in the lead powder, silver, or slick foil embedded between them. The slick metal produced only a small shear force, which helps to reduce the sliding force. Some other commonly used dry-type smoothing agent graphite and two aluminum sulfide. They have a crystal surface structure or weak molecular separation force. When the relative motion of two appearance, it will only destroy these constructs without shear rough appearance. Known to be used properly, these approaches are very effective.hydraulic couplers


    Smooth liquid (ordinary hydraulic oil) to participate in the contact surface between liquid and constitute. Pressure to the fluid between the two contact surfaces and a complete parting of the two contact surfaces, so that you reach a smooth hydraulic power. In such circumstances, to stop the force of the relative motion of the two contact surfaces, as long as the force required to shear hydraulic oil. Smooth, hydraulic power conditions, the wear and tear can neglect, excluding, and the friction coefficient is very small. Air bearing, thrust bearing Hopkins Be rle and well-designed journal bearing can reach the smooth hydraulic power.hydraulic banjo fittings


    If the smooth liquid can not contact the surface integrity of parting. Rough contact surface between the shear. Oil to maintain contact with the surface of parting can reduce the tendency of the shear force, and in order to constitute a non-contact surface on the appearance of the new shear, all these can provide smooth role. The first two elements and the viscosity of the fluid intimacy. The last factor depends on the chemical properties of the fluid and the characteristics of the sport appearance.hydraulic tube fittings


    Smooth interface chemical properties of the available chemical grinding theory to describe. Metal appearance will be under pressure, the tw o mesh together with a certain contact area. If two metal relative motion attack at the contact point will be part of the high temperature. Such a high temperature oil, for example, some oil-containing phosphate and metal chemical reaction constitutes a melting temperature lower than the original metal alloys. In this way, the greater the wear and tear the cost of preventing the spread of force between the metal. Directly the mechanism of this smooth and fluid - metal chemistry, and therefore if using this method, a fluid can only smooth a limited number of metals.