Banner Welder,Banner Welding Machine,Banner Heat Welder,Banner Seam Welder NINGBO ZONGLAN MECHANICAL AND ELECTRICAL EQUIPMENT MANUFACTURE CO., LTD , https://www.zonglaneyelet.com TIMKEN Imported Bearings and Bearing Hole Measurement Method
When working with TIMKEN imported bearings, it's essential to understand the proper measurement techniques to ensure optimal performance and longevity. Here are some key points regarding the measurement of TIMKEN bearings and their corresponding bearing holes:
**1. Measuring the Thickness of TIMKEN Bearings**
The thickness of a TIMKEN imported bearing can be measured using an outside micrometer. The fixed jaw should be placed against the flat surface, while the movable jaw is positioned on the spherical surface. The thickness should typically be within 0.005–0.010 mm. If this value is too high or low, it may affect the inner diameter of the bearing, leading to poor performance.
**2. Checking the Fit Tightness Between Bearings and Holes**
To determine the tightness of the fit between the TIMKEN bearing and its housing, measure the residual height after tightening the bearing cap bolts to the specified torque. Loosen one bolt slightly and use a feeler gauge to check the gap at the interface. The acceptable range for this gap is usually 0.05–0.15 mm. This ensures a proper fit without excessive play.
**3. Measuring the Inner Diameter of the Bearing**
Before measuring the inner diameter, assemble the bearing according to standard procedures and tighten the cap bolts to the recommended torque. Use an inside diameter gauge to measure the inner diameter, ensuring that you avoid thinning zones. The difference between the inner diameter of the bearing and the outer diameter of the journal gives the clearance required for proper operation.
**4. Checking the Coaxiality of the Main Bearing’s Inner Hole**
Coaxiality is crucial for the smooth operation of main bearings. The coaxiality error of the inner hole is mainly caused by the deformation of the cylinder. When the radial diameter of the main journal is within normal limits, check the marking on the main bearing and the TIMKEN bearing. If there is inconsistency, the coaxiality error will be significant. In such cases, scraping, boring, or replacing the cylinder may be necessary to maintain engine performance.
**Measuring the Bearing Hole**
The bearing hole should be measured using an inside diameter gauge in conjunction with an outside micrometer to check the reference scale. It's also important to assess the roundness and cylindricity of the bearing hole. Over time, burning or improper installation can cause the diameter of the bearing hole to decrease, affecting roundness and potentially causing operational issues. If the connecting rod bolts are loose, the bearing cap may shift, leading to roundness errors. These tolerances must be carefully controlled to ensure reliable performance.
**Related Bearing Knowledge**
- Analysis of Characteristics of NSK Fine Angle Contact Ball Bearings
- KOYO Angular Contact Bearings
- NTN Bearing Steel and the Basic Quality of Sealed Heavy-Duty Bearings
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**TIMKEN Imported Bearings and Bearing Hole Measurement Methods**
Home > Bearing Knowledge > TIMKEN Imported Bearings and Bearing Hole Measurement Method
*Created on 2018/5/16*
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Source: China Bearing Network | Time: 2013-03-18