/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Three kinds of specifications and testing skills of NSK bearing quality analysis Analysis of three specifications and testing skills of NSK bearing quality
The top of the list and the reasonable structural design are advanced; there will be a long NSK bearing life. The bearing is usually produced through multiple processing steps such as casting, heat treatment, turning, grinding and equipment. Sex, advancement, and stability will also affect the life of the bearing. The heat treatment and grinding process that affects the bearing quality of the product; often have a more direct relationship with the failure of the NSK bearing. The research indicates that the grinding process is closely related to the quality of the NSK bearing. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Second, the metallurgical quality of NSK bearing data was once the primary factor affecting the early failure of rolling bearings. Following the advancement of metallurgical skills (such as vacuum degassing of bearing steel); the quality of the original data was improved. The original data quality factor was analyzed in NSK bearing failure. The proportion of the medium has been significantly reduced; bearing but it is still one of the primary factors affecting bearing failure.
Third, whether the selection of materials is still the necessary factor for NSK bearing failure analysis is the primary task of NSK bearing failure analysis; based on a lot of set data, analysis data and failure modes; find out the primary factors that form bearing failure; Alignment is proposed to improve the method; extend the service life of the bearing; avoid the sudden early failure of the bearing attack. The device condition is one of the primary factors in the application of the element. NSK bearings often incur the entire set of NSK bearing parts due to improper installation. The tension between the forces changes; the NSK bearing operates under abnormal conditions and fails prematurely.
When testing; first open the NSK bearing cover; use the appropriate diameter of the lead wire; cut it into 15~40 mm long section; place it on the journal and the upper and lower bearing interface; cover the bearing cover; tighten according to the regular torque Fix the bolt; then loosen the bolt; remove the bearing cap; use a micrometer to check the thickness of the flattened wire; and find the average value of the bearing top clearance.
If the headspace is too. Slightly thin (11) 峦呓岷 嫔 嫔 . .. If too large; then reduce the pad, scrape the ground or cast the tile from the head.
Adjustment of bearing bushing force: In order to avoid the possible transition and axial movement of the bearing bush during operation; in addition to cooperating with interference and stop parts; the bearing bush also needs to be pressed with NSK bearing cap; measuring method and measuring top clearance The method is the same; the thickness of the soft lead wire is measured; the bearing bushing force can be calculated (indicated by the amount of elastic deformation after the bushing is tightened)
Usually, the bearing force of the bearing bush is between 0. 02 and 0. 04 mm. If the pressing force does not meet the specifications, it can be adjusted by increasing or decreasing the thickness of the gasket at the joint surface of the NSK bearing and the bearing housing; the back of the tile is not allowed to be padded.
Sliding NSK bearings in addition to ensuring radial clearance; should also ensure axial clearance. When detecting axial clearance; move the shaft to a pole orientation; then measure the axis from one pole to the other with a feeler or dial indicator The amount of azimuth is the axial gap.
When the gap of the sliding NSK bearing does not conform to the rules; adjustment should be made. The split bearing is often used to adjust the radial clearance (top clearance).
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Analysis of three specifications and testing skills of NSK bearing quality
Source: China Bearing Network Time: 2013-09-12