Ways to Improve the Accuracy of SKF Bearing Units

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Improving the accuracy of SKF bearing units is essential for ensuring smooth operation and long-term performance in machinery. Bearings are critical components in many mechanical systems, and their precision directly affects the overall efficiency and reliability of the equipment. Below are several effective methods to enhance the accuracy of SKF bearings. **1. Precision Improvement Method for SKF Bearings** After installing an SKF bearing into a host device, it's important to measure its radial runout. By taking successive measurements, you can observe that the values may vary slightly but tend to repeat after a certain number of rotations. This repetition indicates the "quasi-period" of the rotational accuracy. If the amplitude of variation within this period is large, it suggests poor rotational accuracy. To improve this, proper preloading of the spindle can be applied. Gradually increasing the speed to near operating levels helps achieve a "run-in" effect, which enhances the bearing’s cycle rotation accuracy over time. **2. A Method to Enhance SKF Bearing Precision** In one case, a factory used a 6202/P2 type bearing for a precision instrument, but the accuracy was still unsatisfactory. To address this, they modified the rear journal by adding a raceway and replacing the inner ring. The steel balls were carefully measured and divided into three groups, each spaced approximately 120° apart. This helped reduce the processing and mating surface irregularities, while also improving the stiffness of the shaft-bearing system. As a result, the axial reversal accuracy improved significantly, meeting the required standards for the instrument. **3. Inductive Verification Method for SKF Bearing Device Accuracy** After installing an angular contact ball bearing into the spindle of an SKF bearing, the following steps can be taken to verify the device’s accuracy (for example, on a general lathe with a shaft diameter of 60–100 mm): - **Step 1:** Measure the dimensions of the shaft and the bearing housing hole to determine the fit precision. The inner ring should have an interference fit with the shaft (0 to +4μm), and the outer ring should have a clearance fit with the housing (0 to +6μm). Ensure the circularity of the shaft and seat hole is less than 2μm, and the parallelism of the bearing spacer face is also under 2μm. - **Step 2:** Clean the bearing thoroughly with a degreasing oil, then fill it with a 3%–5% grease solution. Apply a small amount of grease (10%–15% of the bearing space) using an oil gun. Heat the bearing to raise its temperature by 20–30°C before installation. Use a hydraulic press to mount the bearing on the shaft, ensuring proper axial positioning and checking the initial torque to confirm the correct preload. - **Step 3:** Heat the housing hole by 20–30°C and insert the bearing assembly gently. Adjust the front cover and tighten it to a precision of 0.02–0.05μm. Use a dial gauge to measure the runout of the journal and the coaxiality of the bearing housing holes. - **Step 4:** Select the free-end bearing in a way that compensates for any errors. Position the bearing correctly in the housing to minimize the impact of roundness and coaxiality errors. By following these detailed procedures, the accuracy of SKF bearing units can be significantly enhanced, leading to better performance and longer service life in various industrial applications. --- **Related Bearing Knowledge** - Bearing Steel Development Trends - Introduction to Rolling Bearings - Common Types of Rolling Bearings - Inch Tapered Roller Bearings (LM603049/11) - How to Choose the Right Bearing Type - How to Improve the Fit Rate of Cylindrical Roller Bearings This article is sourced from China Bearing Network. For more information, visit [China Bearing Network](http://www.chinabearing.net). Previous: The Limit Speed of NSK Bearings Next: How to Improve the Matching Rate of Cylindrical Roller Bearings

Steel Belt Traction Machine

Steel belt elevator advantages
1. Steel belt traction elevator, can maximize the utilization rate of well, reduce the top height, reduce pit depth.
2. Maintenance-free: the inner steel belt is multi-strand high strength steel wire, the surface is polyurethane polymer material, without lubrication.
3. High life: the life of steel belt is 2‐3 times that of traditional steel wire rope.
4. High efficiency: the steel belt and wheel contact area is larger, more efficient and energy saving.
5. Noise reduction: steel belt and wheel friction noise is less.
6. Because the diameter of the main wheel and the regulating wheel of the steel belt becomes smaller, there is no need for Angle change, which is beneficial to prolong the life of the steel belt and smooth operation.

Notes for installation of steel belt elevator
1. High levelness is required for the steel belt host due to the larger width of the traction wheel.
2. At the same time, ensure the levelness of the main wheel and the regulating wheel in all directions to prevent the deviation of the steel belt.
3, keep the cleanliness of the steel belt.
4, FAXI steel belt host specially equipped with McGowdy steel belt, pay attention to the rough surface of the steel belt and traction wheel contact when installing.

5. Confirm the consistency of the tension force of each steel belt

Belt traction machine,Steel belt traction machine,gearless traction machine,Belt motor,gearless motor

Suzhou Keffran Parts Co.,ltd , https://www.keffran-elevatorsmart.com