Overview
Available with cylindrical, tapered, and spherical rollers, thrust roller bearings sustain only axial loads. NSK’s thrust roller bearings are suitable for heavy loads and offer high axial rigidity. Machined brass cages are used as standard.
Thrust tapered roller bearings come in two types: the TT type, which has a flange on the housing washer (outer ring), and the TTF type, which does not. The TT type is suitable when it can be securely fixed in the radial direction, while the TTF type tolerates slight misalignment that occurs between the shaft and housing during operation.
Thrust spherical roller bearings contain convex rollers that make them self-aligning and unaffected by mounting error and shaft deflection. The E-type offers a high load capacity design with a pressed steel cage.
Documents
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Product List
Cylindrical Roller Thrust Bearings
Cylindrical Roller Thrust Bearings
Cylindrical roller thrust bearings can only receive axial load, but support high-load applications and offer high axial rigidity. Cages are typically made of machined brass.
Features
- High load capacity/high rigidity
Designed with a simple structure that provides high axial load capacity and rigidity. - Ideal for low speeds
Though they are not suited for high speeds due to differential sliding of the rollers, cylindrical roller thrust bearings have a compact, cage-guided design.
Applications
- Rotary work tables for machine tools, powdering machine rotary tables, extruders
Tapered Roller Thrust Bearings
Tapered Roller Thrust Bearings
These thrust bearings containing tapered rollers come in two types. TT bearings, which have a rib on the housing washer, can accurately guide the shaft in the radial direction, while TTF bearings, which have no rib on the housing washer, can tolerate some eccentricity during operation.
Spherical Roller Thrust Bearings
Spherical Roller Thrust Bearings
Spherical roller thrust bearings are self-aligning, making them unaffected by mounting errors and shaft deflection. The E-type uses an even higher load capacity design featuring a pressed steel cage. We recommend machined brass cages for horizontal shafts and high-speed applications. Please contact NSK for details.
As these bearings have many parts that are hard to reach with grease, oil lubrication is used even at low speeds. Cages are typically made from machined brass.
Features
- Correct for misalignment
The spherical raceway surface of the housing washer makes spherical roller bearings self-aligning. - High load capacity
Spherical roller bearings offer high axial load capacity, with some capacity for radial load when axial load is applied.
Applications
- Air preheaters, extruders, injection molders, excavators, cranes
FAQ
- Can cylindrical roller thrust bearings be used without positioning by the outside diameter of the outer ring?
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- The fixed-side ring (outer ring) does not require especially precise positioning; however, a guide should be used to prevent the raceway from shifting and protruding from the rolling surface of the rollers.
- If a cylindrical roller thrust bearing is used with a horizontal shaft, what kind of fit will be used with the housing side? Is it necessary to provide the same “0.25 mm or above” clearance as thrust ball bearings?
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- This clearance is recommended for thrust ball bearings as they may be subject to radial loads. Cylindrical roller thrust bearings cannot handle radial loads by design, so such a large clearance is not necessary.
- Can thrust roller bearings sustain radial loads?
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- With the exception of cylindrical roller thrust bearings and some tapered roller thrust bearings (TTF type), it is possible in theory for thrust roller bearings to take radial loads to a certain percentage of the axial load. However, stable operation under these conditions requires careful restrictions. For this reason, we primarily recommend thrust roller bearings for axial load applications.
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