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When axial loads need to be managed with precision and the cost of misalignment is downtime, engineers and maintenance professionals turn to single direction axial thrust ball bearings. Whether you are rebuilding a hydraulic press, servicing a vertical pump shaft, or maintaining a machine tool spindle, selecting the correct thrust bearing is critical to keeping equipment running within tolerance.
This listing covers the 51412 through 51418 series of single direction axial thrust ball bearings. Each bearing consists of two washers (shaft washer and housing washer) and a ball-and-cage assembly. Inner diameters range from 60 mm (2.362 in) to 90 mm (3.543 in), outer diameters from 130 mm (5.118 in) to 190 mm (7.480 in), and widths from 51 mm (2.008 in) to 77 mm (3.031 in). All dimensions conform to ISO 104 / DIN 711 standards.
Typical applications include vertical shaft assemblies in centrifugal pumps, axial load management in screw compressors, thrust positioning in milling machine spindles, and load-bearing stages in hydraulic cylinder end caps — all environments where single direction axial thrust ball bearings must sustain continuous one-directional thrust without radial loading.
ID range 60–90 mm, OD range 130–190 mm, width range 51–77 mm. Select the exact model that matches your shaft and housing dimensions without modification.
Standardized washer geometry ensures drop-in interchangeability with OEM and aftermarket components across the 514xx series.
The flat-washer and ball-cage construction channels thrust forces along the shaft axis, maintaining precise axial positioning under sustained load cycles.
Through-hardened steel washers resist brinelling and surface fatigue under high static and dynamic axial loads, extending service intervals in demanding duty cycles.
The pressed-steel cage maintains uniform ball spacing, reducing friction torque and heat generation during continuous rotation — important in high-cycle press and pump applications.
Each order ships as a complete bearing assembly (shaft washer + housing washer + ball-cage assembly), ready for direct installation.
| Bearing Series | 514xx (Single Direction Axial Thrust) |
|---|---|
| Models Covered | 51412, 51413, 51414, 51415, 51416, 51417, 51418 |
| Inner Diameter (ID) | 60 mm – 90 mm (2.362 in – 3.543 in) |
| Outer Diameter (OD) | 130 mm – 190 mm (5.118 in – 7.480 in) |
| Width / Height | 51 mm – 77 mm (2.008 in – 3.031 in) |
| Load Direction | Axial (single direction) only |
| Bearing Type | Thrust ball bearing, flat-washer type |
| Dimensional Standard | ISO 104 / DIN 711 |
| Lubrication | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C₀) | See variant options |
| Limiting Speed | See variant options |
| Quantity per Order | 1 pc (complete assembly) |
Match the bearing's inner diameter (ID) to your shaft diameter. The 51412 fits a 60 mm shaft, 51413 fits 65 mm, 51414 fits 70 mm, 51415 fits 75 mm, 51416 fits 80 mm, 51417 fits 85 mm, and 51418 fits 90 mm. Also verify that the outer diameter and width fit within your housing bore and axial space envelope before ordering.
No. Single direction axial thrust ball bearings are engineered exclusively for pure axial (thrust) loads acting in one direction along the shaft axis. Applying radial loads will cause rapid raceway damage and premature failure. If your application involves combined radial and axial loading, consider angular contact ball bearings or tapered roller bearings instead.
The shaft washer, housing washer, and rolling balls are manufactured from through-hardened bearing steel. The cage is typically pressed steel. This construction provides the hardness and fatigue resistance required for sustained axial thrust applications. Contact us to confirm specific material grades for your application.
Standard 514xx series bearings use carbon bearing steel, which is not inherently corrosion-resistant. For wet, washdown, or mildly corrosive environments, ensure adequate re-lubrication intervals with a water-resistant grease, or contact us to confirm availability of stainless-steel or coated variants for your specific model.
For most industrial applications, a lithium-based NLGI 2 grease is suitable. Fill the bearing cavity to approximately 30–50% of free space — overfilling increases operating temperature. Re-lubrication intervals depend on speed, load, and operating temperature; consult your equipment's maintenance schedule or a bearing lubrication guide for specific intervals.
Each unit ordered includes the complete bearing assembly: one shaft washer, one housing washer, and one ball-and-cage assembly. No additional components are required for a standard installation. Verify your housing design accommodates the flat-washer style before installation.
Cross-reference the model number (e.g., 51414) with your equipment's OEM parts list or bearing specification sheet. The 514xx series follows ISO 104 / DIN 711 dimensional standards, so any bearing listed under the same model number from a compliant manufacturer will share identical envelope dimensions. If you need confirmation, contact us with your equipment make, model, and shaft diameter.
