Extend the maintenance and maintenance of TIMKEN angular contact ball bearings

In order for TIMKEN bearings to be fully utilized and to maintain their proper performance for a long time, regular maintenance (regular inspection) must be performed.

Through proper periodic inspections, early detection of failures and prevention of accidents are important to improve productivity and economy.

1, cleaning

When the angular contact ball bearing is removed for inspection, the appearance record is first recorded by photography. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings.

a. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.

b. When rough washing, remove the grease or adhesive with a brush or the like in the oil. At this time, if the TIMKEN bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.

c. When washing finely, slowly rotate the bearing in the oil and carry out it carefully.

The cleaning agent generally used is a neutral non-aqueous diesel oil or kerosene, and a warm alkali liquid or the like is sometimes used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean.

Immediately after cleaning, apply anti-rust oil or anti-rust grease to TIMKEN bearings.

2, inspection and judgment

In order to judge whether the removed angular contact ball bearings can be reused, it is important to check the dimensional accuracy, rotation accuracy, internal clearance, mating surfaces, raceway surfaces, cages and seals.

Regarding the inspection result, it can be judged by a person who is using a conventional bearing or a proficient bearing.

The criteria for judgment vary depending on mechanical properties and importance, inspection period, and the like. Bearings must not be reused if they are damaged and must be replaced.

1) Breakage and defects of bearing components.

2) Peeling of the rolling surface of the raceway surface.

After the bearings have been installed, alignment may result in additional loads, friction and vibration of the angular contact ball bearings if not carefully aligned. These can accelerate fatigue and reduce bearing life and can damage the life of other machine parts. In addition, increased vibration and friction can greatly increase energy consumption and risk of premature failure.

3. Basic condition monitoring

During use, the basic external conditions of TIMKEN bearing operation, such as temperature, vibration and noise measurements, are often monitored. These regular inspections will identify potential problems early and will prevent unexpected machine stops, enabling production plans, increased plant productivity and efficiency.https://www.supplyforever.com/

Selection principle of rolling bearing steel

When designing and manufacturing rolling bearings, the bearing materials are generally selected according to the following principles.

First, according to the working conditions of the bearing
1. Operating temperature
Bearings operating at room temperature are made of chrome bearing steel. Chromium bearing steels are also used at operating temperatures above 150 ° C and below 250 ° C, but subjected to special heat treatment (requires tempering at 200 ° C or 300 ° C).
2. The magnitude of the impact load
Bearings with strong impact loads are generally not made of chrome bearing steel, and most of them are made of high-quality carburized structural steel, impact-resistant tool steel or quenched and tempered structural steel.
3. Contact medium
Bearings used in corrosive media must be made of corrosion-resistant steel or alloy steel with good corrosion resistance.

Second, according to the type of structure of the bearing
The structure of the bearing parts is more complicated. For example, when the outer ring is equipped with a rib, and the high impact load is required, the carburized steel with good processing performance should be used; the outer ring of the rolled needle bearing can be made of 08 and 10 low carbon steel (good plasticity) Suitable for cold stamping); the joint bearing used in the swing mechanism or the operating mechanism can be cold extruded by using GCr15, 9Cr18, 9Cr8Mo and alloy structural steel with excellent cold plastic deformation properties.

Third, according to bearing fatigue life and reliability requirements
Bearing fatigue life and reliability depend to some extent on the purity and uniformity of the steel. For general use, use ordinary bearing steel smelted in acid open hearth furnace or alkaline electric furnace. With the continuous improvement of the smelting method, new smelting methods such as current remelting, vacuum smelting, and electron beam furnace smelting have been produced, and the bearing made of the bearing steel made by the above method has a correspondingly improved life. Suitable for bearings with special requirements for fatigue life and reliability, such as axlebox bearings for railway vehicles, aerospace engine spindle bearings and navigation system bearings.
In addition, in the selection of steel grades should also consider the processing properties of steel, supply of goods and domestic resources.

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