Talking about: Roller Bearing Cage and Heat Treatment

The basic type of drum roller bearings can be either window glass fiber reinforced polyamide (nylon) 66 holders (suffix T) or machined brass body holders (suffix MB). The glass fiber reinforced polyamide 66 adheres to a frame at a temperature of up to 120 ° C. If the bearing oil is smooth, the additives in the smooth oil will reduce the service life of the frame, and the aged oil will also have an adverse effect on the frame at low temperatures; therefore, it is necessary to pay attention to the oil change period.

Drum roller bearing heat treatment

The heat-treated FAG drum roller bearing has a task temperature of up to 150 ° C, and the bearing temperature of the outer diameter exceeding 120 mm can still maintain the dimensional stability when the temperature reaches 200 ° C. If the bearing is made of polyamide, it is necessary to pay attention to the binding of the frame data to temperature.

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Minimum load of tapered roller thrust bearing

Minimum load of tapered roller thrust bearings - SKF bearings:

In order to ensure satisfactory operation, like all ball bearings and roller bearings, tapered roller thrust bearings must always withstand a certain minimum load, especially when the bearing is running at high speed or in the direction of the load being subjected to high acceleration or rapid change. In the state. The inertial forces of the rollers and cage and the friction of the lubricant can adversely affect the rolling condition in the bearing arrangement and can cause destructive sliding between the rollers and the raceways.

The following formula can be used to estimate the minimum axial load to be applied to a one-way tapered roller thrust bearing:

among them:

China Automotive Bearing Network

Fam = minimum axial load, kN

A = minimum load factor (see product table)

n = speed, r/min

Higher loads are required even at low temperatures or when the viscosity of the lubricant is very high. The weight of the components supported by the bearing plus the external force should generally exceed the minimum required load. Otherwise, an additional axial load must be applied to the one-way tapered roller thrust bearing.

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It is not necessary to check the minimum axial load of the screw-on bearing because such a bearing applies a preload through the O-ring or a spring-loaded preload in the reversing mill. When a preload is applied using an O-ring, the preload force should compress the diameter of the O-ring by approximately 20%.

When the bearing is preloaded by a spring, the minimum load depends on the weight of the relevant component. According to the requirements, SKF Application Engineering Services can provide the corresponding values.

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