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When vertical or axial loads cause premature wear on rotating shafts, the right thrust bearing makes all the difference. Engineers, machinists, and serious DIYers working on lathes, rotary tables, automotive steering columns, and industrial machinery need axial ball thrust bearings that hold their geometry under sustained load — without play, noise, or early fatigue.
These axial ball thrust bearings are constructed with a hardened steel ball complement seated between two grooved washers (shaft washer and housing washer), conforming to the 511xx and 512xx series dimensional standards. Inner diameters span 10mm to 150mm (approx. 0.39" to 5.91"), with outer diameters from 24mm to 190mm (approx. 0.94" to 7.48") and thicknesses from 9mm to 31mm (approx. 0.35" to 1.22"), covering the full 51100–51320 range.
Typical use cases include: single-direction axial load support on vertical shaft assemblies such as crane hooks and jack screws; rotary table and indexing fixture preloading in CNC and manual machining setups; automotive steering column and gearbox thrust positioning where compact axial footprint is critical.
33 size variants from 51100 (10×24×9mm) to 51130 (150×190×31mm), covering light-duty to heavy industrial axial load requirements in a single product line.
Precision-ground raceway grooves on both shaft and housing washers guide the ball complement accurately, reducing friction and maintaining consistent axial clearance under load.
Through-hardened bearing steel washers and balls resist deformation under sustained axial thrust, extending service life in continuous-duty applications.
Conforms to standard 511xx/512xx series dimensions, ensuring drop-in interchangeability with OEM and aftermarket housings without custom machining.
Engineered specifically for unidirectional axial (thrust) loads — ideal for jack screws, crane hooks, rotary tables, and steering columns where radial loads are handled separately.
Each listing ships as a single bearing assembly (shaft washer + ball complement + housing washer), letting you order exactly the quantity your project requires.
| Bearing Series | 511xx / 512xx (51100–51320) |
|---|---|
| Inner Diameter (ID) Range | 10mm – 150mm (0.39" – 5.91") |
| Outer Diameter (OD) Range | 24mm – 190mm (0.94" – 7.48") |
| Thickness Range | 9mm – 31mm (0.35" – 1.22") |
| Bearing Type | Single-direction axial ball thrust bearing |
| Construction | Shaft washer + ball complement + housing washer |
| Material | Hardened bearing steel |
| Dimensional Standard | ISO / DIN 511xx / 512xx series |
| Load Direction | Axial (single direction) |
| Quantity per Order | 1 PCS |
| Specific Size (ID×OD×Thickness) | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C0) | See variant options |
| Max Speed | See variant options |
Match the bearing's Inner Diameter (ID) to your shaft diameter and the Outer Diameter (OD) to your housing bore. The thickness must fit within your available axial space. Each variant lists its dimensions in the format ID×OD×Thickness (e.g., 51106 = 30×47×11mm). Measure your shaft and housing precisely before selecting.
The 511xx series (e.g., 51100–51120) uses a thinner washer profile suited for lighter axial loads and tighter axial space constraints. The 512xx series (e.g., 51208–51215) features a taller washer profile with a larger ball complement, providing higher dynamic and static load ratings for heavier-duty applications at the same bore size.
No. Axial ball thrust bearings are designed exclusively for single-direction axial (thrust) loads. They cannot support radial loads. If your application involves combined radial and axial loads, pair this bearing with a separate radial bearing (e.g., deep groove ball bearing) on the same shaft.
These bearings are made from hardened bearing steel, which offers good wear resistance but is not inherently corrosion-proof. For damp or wet environments, apply a compatible bearing grease with corrosion inhibitors and consider a protective housing seal. For highly corrosive environments, contact us to confirm suitability.
These are open-type thrust bearings without integral seals or shields. They are typically supplied with a light protective coating. Before installation, apply a suitable bearing grease (NLGI Grade 2 lithium-based grease is commonly recommended) to the raceways and ball complement for proper lubrication.
Yes. These bearings conform to ISO/DIN 511xx and 512xx dimensional standards, making them dimensionally interchangeable with OEM and aftermarket bearings carrying the same series designation (e.g., 51106, 51208). Always verify ID, OD, and thickness match your existing bearing before installation.
Common applications include: automotive steering columns and gearboxes; lathe and milling machine rotary tables; crane hooks and lifting equipment; hydraulic jack screws and actuators; indexing fixtures and turntables; and general industrial machinery where vertical or axial shaft loads must be managed.
