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Classification of thin-section bearings

Classification of thin-section bearings

Generally divided into rubber seal-RS, iron seal-ZZ, plane, iron card-K, copper card-M. For example: 608RS, 6914ZZ, 61926K, 61844M. Thin Wall Crossed Roller Bearings CRA series thin-walled crossed roller bearings (outer ring split type) are small and lightweight crossed roller bearings made of thinner outer ring and inner ring. The mounting parts of the bearings can be lightened..

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Inch tapered roller bearing numbering system

Inch tapered roller bearing numbering system

Inch tapered roller bearing numbering system The new number consists of five parts of letters and numbers:

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Precision bearing distinction

Precision bearing distinction

Precision bearing distinction Precision bearings and ordinary bearings should be distinguished from the following points: 1. Dimensional requirements are different, and the dimensional deviation (inner diameter, outer diameter, ellipse, etc.) of products with high precision grades is smaller than that required by products with low precision grades;

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Precision bearing fit

Precision bearing fit

Precision bearing fit In order to ensure that the bearing does not produce excessive deformation after installation, it must be done:

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Improve coordination method

Improve coordination method

In order to improve the actual matching accuracy of bearing installation, it is necessary to use measuring methods and measuring tools that do not deform the bearing to carry out actual precise measurement of the matching surface dimensions of the inner hole and outer circle of the bearing, and the measurement of the inner diameter and outer diameter can be carried out All the items are measured, and the measured data are comprehensively analyzed, based on which, the dimensions of the bearing installation parts of the shaft and the seat hole are precisely matched. When actually measuring the corresponding dimensions and geometric shapes of the shaft and seat hole, it should be carried out under the same temperature conditions as when measuring the bearing.

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Composition of combined roller bearings

Composition of combined roller bearings

Composition of combined roller bearings The bearing has a sealed structure and is filled with grease to provide long-term effective lubrication, and the user can avoid lubrication. For the use of harsh working conditions, a channel for replenishing grease can be designed to improve the service life of the bearing. Improper methods can also cause the roller bearing to heat up. Lubrication can reduce the wear of parts during movement, ensure the precision of the press, and reduce energy consumption. Lubrication is divided into thin oil lubrication, thick oil lubrication and so on. Composition of combined roller bearings

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Install

Install

1) Wash the bearing with kerosene, press it into the bearing seat, fill the roller of the outer ring of the bearing with Shell No. 3 lithium base grease to two-thirds full, spread it evenly with clean hands, install the ntn bearing gland, and use additional coating The fastening bolts of the bolt anti-loosening glue compress the bearing gland;

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Maintenance of roller bearings

Maintenance of roller bearings

Thin oil lubrication: the advantage is that the internal friction coefficient is small, so the energy consumed to overcome friction is less, the thin oil has good fluidity, and is easy to enter the friction surface of each lubrication point, has a good cooling effect, and can adhere to the friction surface Impurities and metal particles produced by grinding are carried away. The disadvantage is that the oil film cannot withstand a large unit pressure and has high requirements for sealing. High-speed presses are generally lubricated with large-flow thin oil, which can take away the heat generated by each friction pair.

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