Tapered Roller Thrust Bearings

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A thrust bearing is a particular type of rotary bearing. Like other bearings they permit rotation between parts, but they are designed to support a predominantly axial load.

Thrust ball bearings, composed of bearing balls supported in a ring, can be used in low thrust applications where there is little axial load.
Cylindrical thrust roller bearings consist of small cylindrical rollers arranged flat with their axes pointing to the axis of the bearing. They give very good carrying capacity and are cheap, but tend to wear due to the differences in radial speed and friction which is higher than with ball bearings.
Tapered roller thrust bearings consist of small tapered rollers arranged so that their axes all converge at a point on the axis of the bearing. The length of the roller and the diameter of the wide and the narrow ends and the angle of rollers need to be carefully calculated to provide the correct taper so that each end of the roller rolls smoothly on the bearing face without skidding. These are the type most commonly used in automotive applications (to support the wheels of a motor car for example), where they are used in pairs to accommodate axial thrust in either direction, as well as radial loads. They can support greater thrust loads than the ball type due to the larger contact area, but are more expensive to manufacture.
Spherical roller thrust bearings use asymmetrical rollers of spherical shape, rolling inside a house washer with a raceway with spherical inner shape. They can accommodate combined radial and axial loads and also accommodate misalignment of the shafts. They are often used together with radial spherical roller bearings. Spherical roller thrust bearings offer the highest load rating density of all thrust bearings.[1]
Fluid bearings, where the axial thrust is supported on a thin layer of pressurized liquid—these give low drag.
Magnetic bearings, where the axial thrust is supported on a magnetic field. This is used where very high speeds or very low drag is needed, for example the Zippe-type centrifuge.
Thrust bearings are commonly used in automotive, marine, and aerospace applications. They are also used in the main and tail rotor blade grips of RC (radio controlled) helicopters.

Thrust bearings are used in cars because the forward gears in modern car gearboxes use helical gears which, while aiding in smoothness and noise reduction, cause axial forces that need to be dealt with.

Thrust bearings are also used with radio antenna masts to reduce the load on an antenna rotator.

One specific thrust bearing in an automobile is the clutch "throw out" bearing, sometimes called the clutch release bearing.

SKF BFSB 353312/HA1 Needle Roller and Cage Thrust Assemblies

21.0000 mm 4.000 mm
C0 (Normal) 0.0030 Kg

SKF BFSB 353210 Tapered Roller Thrust Bearings

165 120x165x45
4656 r/min 2,80 Kg

SKF BFSB 353901/HA4 Custom Bearing Assemblies

3880 r/min 392 kN
50 ISB

SKF 351573 Screw-down Bearings

440 mm 360 mm
440 PSL

SKF BFSB 353247 Cylindrical Roller Thrust Bearings

45 70x120x45
107 mm Timken

SKF BFSB 353201 Thrust Bearings

78 mm 695,8 kN
361,62 kN 4,50 Kg

SKF BFSB 353285/HA4 Needle Roller and Cage Thrust Assemblies

6036ZZ 180x280x46

SKF BFS 8000/HA1 Tapered Roller Thrust Bearings

0.3 mm 26 mm
0.3 mm 8 mm

SKF 350998 Custom Bearing Assemblies

650 mm 638 mm
530 56 mm

SKF 353164 Screw-down Bearings

Timken 22,225 mm
5,56 mm 9,525 mm

SKF BFSB 353205 Cylindrical Roller Thrust Bearings

8,5 mm 3850 1/min / Referen

SKF 351468 A Thrust Bearings

IKO 22 mm
68 mm 46 mm