Bearing surface roughness note that these are very important

Bearing surface roughness attention to these very important: refers to the machining surface with small spacing and small peak valley roughness. The distance between the two peaks or two troughs ( Wave from) Is small ( Below 1 mm) , with the naked eye is hard to distinguish, so it belongs to the micro geometry shape error. The smaller the surface roughness, surface more smooth. The size of the surface roughness, the use of mechanical parts performance has a great influence, mainly displays in the following aspects: (1) the bearing surface roughness affect the abrasion resistance parts. Surface is rough, cooperate with the surface area of effective contact between the smaller, the greater the pressure, the faster the wear. (2) the stability of the bearing surface roughness effects with nature. For clearance fit, the surface is rough, the more easy to wear and clearance in the working process of the gradually increase; Across full cooperation, due to the micro convex peak when assembling crowded flat, reduced the actual interference effectively, reduces the connection strength. (3) bearing surface roughness affect the fatigue strength of parts. Rough parts surface larger trough, they like horns gaps and cracks, is sensitive to stress concentration, which affect the fatigue strength of parts. (4) bearing surface roughness affect the corrosion resistance of parts. Rough surface, easy to make the corrosive gas or liquid by micro grooves on the surface of the valley into the metal lining, causing surface corrosion. (5) the surface roughness affect the sealing parts. Cannot fit closely between rough surface, the leakage of gas or liquid through the gap between the surfaces. In addition, the appearance of the surface roughness of parts, also has effect on the accuracy of measurement. Bearings, comfortable and durable, )