The bearing housing is used to support the bearing, fix the outer ring of the bearing, only let the inner ring rotate, and the outer ring remains stationary, always consistent with the direction of the transmission (such as the running direction of the motor), and maintain balance.
The main materials for manufacturing bearing housings are cast steel (such as ZG45), gray cast iron (such as HT200), ductile iron (such as QT400-17) or stainless steel. The rolling mill bearing housing is mainly made of cast steel. The choice of bearing housing blank is related to its material, structure and size.
Bearing holes with smaller diameters are generally cast in steel molds, and solid castings can also be used; sand molds are used for larger diameters; steel molds are generally used in mass production, which can improve productivity and save materials.
The general production process includes:
1. Blanking
2. Milling
3. Wire cutting
4. Scribe
5. Drilling, tapping
6. Reaming
7. Rounded corners
8. Deburring
Technical point:
1. Inner hole
The inner hole is the most important surface of the bearing seat for supporting and positioning, and it cooperates with the outer ring of the bearing. The dimensional accuracy of the diameter of the inner hole is generally grade 7, and grade 6 is generally used for those with high precision requirements. The shape accuracy of the inner hole is generally controlled within the aperture tolerance range. For bearing housings with high precision requirements, the shape tolerance is controlled within 1 of the aperture tolerance /3~1/2. In addition to cylindricity and coaxiality, the requirements for straightness of the hole axis should also be considered.
2.The distance from the hole axis to the ground
Ensure the parallelism and size of the base and the upper cover.
Maintenance and maintenance of bearing housings
The bearing housing, like the bearing, must be regularly maintained and maintained in order to detect problems as early as possible and solve them early, thereby improving productivity and economy. After the bearing seat is removed, clean the inside of it to remove impurities; then observe whether the aperture surface is worn or bumped; then check the shape and dimensional accuracy of the aperture surface to see if it meets the current requirements, it is necessary Repair or scrap from time to time.