Installation of deep groove ball bearing

Deep groove ball bearing is the most widely used bearing, suitable for high-speed operation, simple maintenance and long service life. But how to install the deep groove ball? Next, Feiqi bearing factory teaches you how to install deep groove ball bearing.
1、 Assembly of deep groove ball bearing
The installation of deep groove ball bearing directly affects the service life of the bearing. It is necessary to install the deep groove ball bearing strictly according to the requirements.
1. Clean the bearing and related parts (grease lubricated bearing, oil seal or dust cover on both sides, seal ring bearing need not be cleaned before installation). And check whether the bearing rotation is flexible.
2. Check the size and finish machining of relevant accessories.
3. According to the structure of the bearing, install it carefully. If it needs to be heated, it must be heated first.
The following methods are generally used for bearing installation:
Press fit: when the inner ring of the bearing is tightly fitted with the shaft, and the outer ring is loosely fitted with the bearing seat hole, the bearing can be pressed onto the shaft with a press, and then the shaft and the bearing can be installed into the bearing seat hole together. During press fit, a matching pipe (copper or mild steel) made of soft metal material is padded on the end face of the bearing inner ring. The outer ring of the bearing is tightly fitted with the bearing seat hole, and the inner ring is loosely fitted with the shaft If the bearing ring is tightly matched with the shaft and seat hole, the inner ring and outer ring of the mounting chamber should be pressed into the shaft and seat hole at the same time. The structure of the assembly sleeve should be able to press the end face of the inner ring and outer ring of the bearing at the same time
Heating fit: it is a common and labor-saving installation method to change the tight fit into loose fit by heating the bearing or bearing seat and using thermal expansion. This method is suitable for the installation of bearings with large interference. Before the hot fit, put the rings of bearings or separable bearings into the oil tank and heat them for 80-100 ℃ on average, then take them out of the oil and install them on the shaft as soon as possible, so as to prevent the internal friction after cooling When the outer ring of the bearing is tightly matched with the light metal bearing seat, the hot fitting method of heating the bearing seat can avoid the scratch of the matching surface. When heating the bearing with oil tank, there should be a grid at a certain distance from the bottom of the box, or the bearing should be hung with a hook. The bearing should not be placed on the bottom of the box to prevent impurities from entering the bearing or uneven heating. The oil tank must have a thermometer, and the oil temperature should not exceed 100 ℃ to prevent tempering effect and reduce the hardness of the ring.
Generally speaking, the installation method of bearing is shaft rotation, so the fit between inner ring and shaft is over fit, and the fit between outer ring and bearing chamber is clearance fit. Bearing operation inspection: after the installation of bearing, the operation inspection should be carried out by the chief operator to determine whether the installation is normal.
2、 Maintenance of deep groove ball bearing
Timely maintenance of deep groove ball bearing can prolong the service life of bearing. Reduce the damage of bearing to bearing
1. Check the running temperature of the bearing, which should be below 65 ℃
2. Check the axial displacement of running parts, mainly whether the bearing clearance meets the requirements
3. Check whether the inner and outer rings of the bearing are damaged. If the damage is serious, replace the bearing in time.
4. Check the lubricating oil or grease. When there is little oil in deep groove ball bearing, add it in time