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Engineers and maintenance professionals who need reliable axial load management often struggle to source the right thrust bearing across a wide bore range without ordering from multiple suppliers. These plane thrust ball bearings cover bore sizes from 10mm (0.39") to 110mm (4.33"), spanning the 51100, 51200, 51300, and 51400 series — all available in one place.
Each thrust ball bearing consists of a grooved shaft washer, a grooved housing washer, and a ball-and-cage assembly. Dimensions follow ISO 104 / DIN 711 standards. Inner diameter (bore) ranges from 10mm to 110mm, outer diameter from 24mm to 190mm, and axial height from 9mm to 63mm depending on the series and size selected.
Typical applications include thrust ball bearings for gearboxes, crane hooks, and rotary tables; axial load bearings for machine tool spindles and jacking screws; and grooved thrust bearings for agricultural equipment and hydraulic cylinders where single-direction axial forces must be precisely managed.
| Bearing Type | Single-direction plane thrust ball bearing |
|---|---|
| Series | 51100, 51200, 51300, 51400 |
| Bore (I.D.) Range | 10–110 mm (0.39"–4.33") |
| Outer Diameter (O.D.) Range | 24–190 mm (0.94"–7.48") |
| Axial Height Range | 9–63 mm (0.35"–2.48") |
| Dimensional Standard | ISO 104 / DIN 711 |
| Load Direction | Single-direction axial (thrust) |
| Cage Material | Stamped steel |
| Lubrication | See variant options |
| Operating Speed | See variant options |
| Dynamic Load Rating (C) | See variant options |
| Static Load Rating (C₀) | See variant options |
| Bearing Number | 51100 to 51322 (see variant selector) |
Start with the shaft diameter — this determines the bore (I.D.) you need. Then check the available housing space to confirm the outer diameter (O.D.) and axial height fit. Finally, select the series (51100 light / 51200 medium / 51300 heavy / 51400 extra-heavy) based on the axial load your application generates. If load data is available, compare it against the dynamic (C) and static (C₀) ratings in the bearing manufacturer's catalog for the specific bearing number.
All four series are single-direction thrust ball bearings, but they differ in outer diameter and axial height for the same bore size. The 51100 series is the lightest (smallest O.D. and height), while the 51400 series is the heaviest (largest O.D. and height) and carries the highest axial load for a given bore. Choose a heavier series when your axial load exceeds the capacity of the lighter series at the same shaft diameter.
No. Plane thrust ball bearings are designed exclusively for single-direction axial (thrust) loads. They cannot support radial loads. In applications where both radial and axial loads are present, a separate radial bearing (such as a deep groove ball bearing) must be used alongside the thrust bearing to carry the radial component.
Yes. Because these bearings conform to ISO 104 / DIN 711 dimensional standards, they are dimensionally interchangeable with thrust ball bearings of the same bearing number from other ISO-compliant manufacturers. The bore, O.D., and axial height will match, allowing direct replacement without modifying shaft or housing seats.
Thrust ball bearings of this type are typically supplied without pre-packed grease and require the user to apply grease or oil suitable for the operating temperature and speed. A lithium-based grease (NLGI Grade 2) is a common choice for general industrial use. Re-lubrication intervals depend on operating speed, temperature, and load — consult your maintenance schedule or the bearing manufacturer's lubrication guide for specific intervals.
Use the variant selector on this page: choose your I.D. × O.D. × Thickness combination first, and the corresponding bearing number (e.g., 51206 for 30×52×16 mm) will be shown in the second selector. You can also cross-reference using an ISO 104 bearing table — the bearing number encodes the bore code and series. For example, 512XX indicates the 51200 series, and the last two digits relate to the bore size code.
Standard thrust ball bearings in this series are manufactured from through-hardened bearing steel with a bright or lightly oiled finish for short-term corrosion protection during storage and transit. They are not stainless steel and are not intended for continuous exposure to water, acids, or highly corrosive environments. For corrosive environments, contact us to confirm availability of stainless or coated variants.
