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Industrial use of fine grinding mill uses rolling, has been in our country has been widely promoted in the saving power consumption, increase production, save oil and reduce the amount of maintenance, reduce pollution and other aspects, received good results. At present, some manufacturers to follow method of Rolling mill, the hollow shaft and the bearing mounting form has more unreasonable, given the mill manufacturers use in the operation of future work brings some disadvantages. To solve this problem, we propose special rolling mill of the best hollow shaft mounting assembly method.
Rolling mill vintage hollow shaft mounting method is suitable for processing into the hollow shaft diameter of the bearing, the bearing heating device, bearing parts, the outer bearing ring with top cover, top cover by access to material spiral tube (or access to materials lining cap) is bolted to the hollow shaft, for pressing. In the grinding operation, access to material spiral tube, bolts often loose, causing the top cover and hollow shaft is displaced from the hollow shaft and the dust will be a gap between the top cap into the bearing box, the grease becomes dirty, cause poor lubrication, resulting in bearing damage have occurred.
In order to overcome some of the above shortcomings, we have gone through years of practice and exploration, designed a new method of installation, and in some manufacturers use to get a good application.
The method is: in the rolling mill parts of the hollow shaft mounting bold in diameter, the hollow shaft is in turn cooled hollow shaft transmission lubrication oil to the bearing temperature to 60 degrees below the normal range.
The advantages of this bearing the following aspects:
1 superior lubrication grease lubrication, the bearing friction coefficient to a minimum, saving better.
2 normal operation of the bearing temperature, oil-lubricated bearings than dry much lower temperatures, extended bearing life.
3 Xiazuo with oil sight bearing oil standard, the operator can readily see the oil level, be able to replenish fuel, preventing poor lubrication due to lack of oil, to avoid bearing damage accident.
4 bearing oil content of the oil chamber, the outer diameter of the bearing can be installed narrowing (installed out equipment to ensure adequate strength and torque strength of the premise), and out of the hollow shaft and feed screw barrel set an end connection flange, and access to material spiral tube flange connection. In the coarse to fine hollow shaft end face of the bearing ring provided a clamping flange, to prevent the bearing axial sprang.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7914A5DB NSK | 70 | 100 | 16 |
| 7313BDB NSK | 65 | 140 | 33 |