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Posted on Nov 12, 2020
Flanged bearings come in several different types and are designed to meet specific application or situation requirements. Different types of these flange bearings have different designs, cages, load capacities as well as different performances.
These bearings are designed to mount ball bearings with high precision and efficiency, as these bearings are very strong, waterproof, and dirt resistant, suitable for mounting in other devices with rotating or linear motion. A flanged ball bearing is not a new kind of bearing.
Just as deep groove ball bearings are provided sealed or open, flanged, or plain bearings are also available. The flange is just another choice given to the designer by the manufacturer of the bearings. The flange is an extension or lip on the bearing outer ring, designed to facilitate bearing mounting and positioning in delicate or problematic applications. In this article, we provide an overview of the different flange bearing types and their applications.
Housings are typically are diamond-shaped, and each side is equipped with two bolt holes. A clear line is created by the line along the axes of the assembly troops through the heart. Flanging locking bearings with three bolts are arranged radially at an angle of 120 ° to each other around the bearing axis or on a triangular flange offset from the bearing axis.
Four flanged rods have four radially mounting holes along the axis of the load. Usually, the four-bolt flanges have round or square housings.
Any application needing a bearing to be installed in a high-vibration environment, as well as any application requiring high axial loads, would benefit from a flanged bearing. Automotive applications are a prime example, a construction engineer must be able to pick and assemble a bearing that can endure both friction and high temperatures.
As a consequence, the adhesive or disturbance fit in the bearing assembly in automotive applications is always inadequate. To guarantee a long life and longevity of the bearing, the option is provided by a flange bearing. The flange bearing can hold its location and withstand the aggressive atmosphere and friction inside the car.
Quite high temperatures would also require the option of a flange bearing. Under-hood applications where temperatures frequently exceed around 180 ° C and the inclusion of materials such as those between the ball bearing and the housing or shaft can result in a different rate of thermal expansion.
For example, a steel bearing is pressed into an aluminum housing; the housing may be stretched earlier than the steel bearing, thereby losing contact with the bearing. Flange bearings are most widely found in light applications such as food processing equipment, conveyors, material storage, HVAC belt drives, textiles, luggage systems, surgical processing, and many other light industrial applications.
There are several specifications to remember when choosing a bearing flange. Top speed is the high speed at which the bearing can work safely before failure. This is influenced by the load properties, the lubrication of the bearings, and the temperature. Normally, the median life of a flange bearing does not exceed five times the rated life.
Bearing life, also known as L10 rating life, is a statistical indicator of life that 90 % of a group of apparently similar ball bearings will attain or surpass. In the case of a single bearing, L10 also applies to the life synonymous with 90% reliability.
Flange loads are a mixture of radial loads and thrust forces. If, in addition to radial loads, the bearing is meant to withstand the thrust forces, the following points must be considered for the extent of the impact force.
If the thrust load is half the radial load, the selection should be made based on the radial load applied. If the thrust loads are equal to or greater than half of the radial load, the selection shall be made based on the total load as the equivalent radial load applied.
If the flange bearing is needed to absorb the thrust forces in addition to the radial loads, a great deal of consideration shall be given to the magnitude of the thrust force. If the thrust load is half of the radial load, the selection should be made based on the radial load applied.
If the thrust load is equal to or greater than half of the radial load, the decision should be made based on using the overall load (radial and thrust loads together) as the equivalent radial load applied.
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