Spherical Roller Thrust Bearings
Spherical thrust roller bearings support heavy axial (thrust) loads in one direction while also accepting a certain amount of radial load. They consist of a shaft washer, a housing washer, asymmetric spherical rollers and a cage. Because the housing washer raceway is spherical, the bearing automatically compensates for misalignment caused by shaft deflection or mounting error (self-aligning). Dimension series include 292, 293 and 294, with bore sizes from several tens of millimetres to large units exceeding 1000 mm. Oil lubrication is common. They are used for heavy axial support in large machinery such as vertical pumps, extruders, crane hooks and marine propulsion shafts.
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Spherical Roller Thrust Bearings
Thrust Self-Aligning Roller Bearings
Thrust self-aligning roller bearings with large axial load capacity and the ability to carry a certain amount of radial load. Bore diameter 100 to 1060 mm. Oil lubrication is commonly used.
JTEKT Corporation
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Spherical Roller Thrust Bearings
Spherical Roller Thrust Bearing Type E (292, 293, 294 series)
Self-aligning spherical roller thrust bearing that supports heavy unidirectional axial loads and heavy radial loads. Covers bore diameters of 60 to 170 mm.
SKF
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Spherical Roller Thrust Bearings
Spherical Thrust Roller Bearings (29000 Series / 292, 293, 294 Series)
Dimension and load rating data for spherical thrust roller bearings with a wide bore range from 60 mm to 1600 mm. Includes SKF Explorer bearings.
SKF
How to choose Spherical Roller Thrust Bearings
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1. Select bore to suit shaft diameter
The bore d is the bore of the shaft washer and is determined by the shaft diameter to be fitted. Listed products range from 60 to 1600 mm. Even at the same bore, the 292, 293 and 294 series differ in outside diameter, height and load capacity, so confirm bore and series together.
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2. Check housing space by outside diameter and height
The outside diameter D defines the housing bore, and the height H defines the axial assembly space. Heavier series have larger outside diameter and height and higher load capacity, so check dimensions against both housing design constraints and required load capacity.
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3. Verify dynamic load rating for life calculation
The basic dynamic load rating Ca is the reference value for life calculation under rotating axial load. When radial load is also applied, convert to equivalent load for evaluation. Some products specify that radial load should be 55% or less of axial load, so check the load ratio as well.
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4. Use static load rating for static and shock loads
The basic static load rating C0a is a guideline for the permissible axial load during standstill, very low speed or shock loading. For applications with start-up shock or heavy loads while stopped, check the safety factor against the static rating as well as the dynamic rating.
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5. Judge rotational speed by two limits
The reference speed is a guide based on heat generation, and the limiting speed is the maximum mechanically permissible speed. If the operating speed exceeds the reference speed, consider heat generation including lubrication method and cooling. Oil lubrication is common for this type.
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6. Check permissible misalignment against shaft tilt
The permissible misalignment angle is the shaft tilt the bearing can accommodate. Listed products range from 0.035 to 0.052 rad. Confirm that shaft deflection and housing mounting error fall within this range. Exceeding it causes uneven load distribution and can lead to early damage.
This guide was written by AI based on the listed products' documents and specification items. Check each manufacturer's documents before adopting.