**Assembly of Hollow Shaft and Rolling Bearing** Home > Bearing Knowledge > Assembly of Hollow Shaft and Rolling Bearing *Created on 2018/5/16* var cpro_id = "u3440131";

Installation of Hollow Shafts with Rolling Bearings

---

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

Industrial fine grinding mills often use rolling bearings, which have been widely adopted in China. These systems help reduce energy consumption, increase production efficiency, save lubricating oil, reduce maintenance, and lower pollution levels—achieving excellent results. However, some manufacturers imitate the design by using rolling mills, which leads to many unreasonable configurations in hollow shaft and rolling bearing setups. This has caused disadvantages for future operations. To address these issues, an improved equipment method has been proposed for the installation of rolling bearings in hollow shaft systems. The traditional approach involved machining the hollow shaft to fit the inner diameter of the bearing, using a thermal setup where the bearing’s outer ring is mounted with a top sleeve. This top sleeve is then bolted into the discharge spiral cylinder or lining, causing frequent loosening during operation. This can lead to misalignment between the top sleeve and the hollow shaft, allowing dust to enter the bearing housing and contaminate the lubricant, ultimately damaging the bearing. Through years of research and practical application, a new installation method has been developed and successfully applied in several manufacturers. The new approach involves increasing the diameter of the rolling bearing used in the hollow shaft system. The hollow shaft is cooled using thin oil, which helps regulate the temperature of the bearing to below 60°C. This improved design offers several advantages: 1. **Better Lubrication**: Thin oil provides smoother lubrication than grease, reducing the friction coefficient and improving energy efficiency. 2. **Extended Bearing Life**: The bearing operates at a more stable temperature, which significantly extends its service life. 3. **Easy Oil Level Monitoring**: A built-in oil level indicator allows operators to monitor and refill the oil as needed, preventing damage from insufficient lubrication. 4. **Reduced Dust Ingress**: The removal of the outer sleeve prevents dust from entering the bearing housing, maintaining better oil quality and ensuring safe and reliable operation. 5. **Improved Cooling Effect**: Increasing the bearing diameter enhances the radial clearance between the bearing and the spiral cylinder, contributing to better heat dissipation and prolonging the bearing's lifespan. These improvements not only enhance performance but also simplify maintenance and reduce long-term costs. --- **Related Bearing Knowledge** - Briefly explain the calculation of bearing life - INA solutions for motorcycle and special vehicle bearings - Common causes of bearing failures - SKF bearing removal and protection techniques - Features of rolling mill bearings This article is linked to http:// Please refer to China Bearing Network at http:// Previous: How to Avoid Noise from the Frame Next: NTN Bearings: Inspection and Troubleshooting During Operation

Commercial Elevator

Commercial Elevator,Commercial Elevators,Building Passenger Elevator,Golden Commercial Elevators

APSL ELEVATOR TECHNOLOGY(SUZHOU) CO.,LTD. , https://www.fujiapsl.com