Self-lubricating bearing performance to a large extent by the matching bearing material surface roughness, hardness. High-quality shaft surfaces extend bearing life. The opposite rough, low hardness of the surface effect, reduce the bearing life.
1, in the fluid lubrication conditions, the requirements of the shaft surface to do mirror processing, as far as possible to reduce the gap between the oil film, so close to the fluid lubrication state, thereby enhancing the performance of the bearing.
2, the bearing under dry friction conditions, as long as the control of its matching shaft surface roughness Ra = 0.4-063 range.
B, the hardness of the shaft
The surface hardness of the shaft is not less than 220HB. In the high load, swing movement conditions, the shaft must be heat treatment hardness HRC50 or hard chrome plating, and then grinding processing, after surface treatment, can improve corrosion resistance, improve surface hardness, improve lubricity. If the corrosion in the sea under similar conditions, the matching axis must be plated two to three hard chrome. Shaft surface rough, sharp burr, groove will damage the bearing sliding layer.
Therefore, choose a good self-lubricating bearing manufacturers, but also with the relative selection of qualified bearing material in order to allow self-lubricating bearings to work properly.