533 Series
Heavy Self-Aligning Thrust Ball Bearings
20–340mm Bore | Single Direction | Heavy + Spherical Seat | P5/P4/P0 Grade
The 533 series combines the heavy cross-section of the 513 series with the self-aligning spherical housing washer of the 532 series — delivering high axial load capacity with built-in misalignment compensation. The ultimate solution for heavy-duty applications where both extreme thrust loads and potential shaft/housing misalignment must be accommodated.
Heavy Load Capacity With Self-Alignment — The Best of Both Worlds
Luoyang Songju 533 series thrust ball bearings merge the heavy cross-section and high load capacity of the 513 series with the self-aligning spherical seat design of the 532 series. This combination delivers the highest possible axial load capacity with built-in misalignment protection — the definitive solution for heavy-duty applications where both extreme thrust forces and imperfect shaft/housing alignment must be managed.
The spherical housing washer and matching aligning seat compensate for static angular misalignment of up to 2–3°, preventing the edge loading that would rapidly destroy a standard flat-washer thrust bearing under heavy load. Large crane hooks, structural bearings, and heavy rotating equipment in field-assembled installations are the classic applications for the 533 series.
Available in bore sizes from 20mm to 340mm. The heavy ball complement and robust washers are identical to the 513 series in cross-section — augmented with the spherical seat for misalignment protection. Machined brass cages (M suffix) are standard for larger sizes. For extreme-duty applications requiring both self-alignment and maximum load capacity, the 533 series has no equal in the thrust ball bearing family.
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533 Series Model Parameters
Complete standard model list. d = Bore, D = Outer diameter, T = Height, Ca = Dynamic axial load, C0a = Static axial load. Data per SKF/NTN/NSK catalogs.
| Model | d (mm) | D (mm) | T (mm) | Ca (kN) | C0a (kN) | Mass (kg) |
|---|---|---|---|---|---|---|
| 53304 | 20 | 42 | 16 | 30.5 | 47.5 | 0.125 |
| 53305 | 25 | 52 | 18 | 39.0 | 67.7 | 0.185 |
| 53306 | 30 | 60 | 21 | 49.2 | 88.3 | 0.288 |
| 53307 | 35 | 68 | 24 | 55.2 | 105.0 | 0.410 |
| 53308 | 40 | 78 | 26 | 72.7 | 138.0 | 0.574 |
| 53309 | 45 | 85 | 28 | 77.5 | 153.0 | 0.722 |
| 53310 | 50 | 95 | 31 | 92.3 | 186.0 | 1.020 |
| 53312 | 60 | 110 | 35 | 119.0 | 248.0 | 1.500 |
| 53314 | 70 | 125 | 40 | 136.0 | 294.0 | 2.220 |
All models include spherical housing washer + aligning seat. Standard: GCr15 steel. M suffix = machined brass cage. For light loads with self-alignment: 532 series. For double-direction with alignment: 543 series. Contact engineering for sizes above 53314.
Why Choose Luoyang Songju 533 Series
The ultimate thrust ball bearing — heavy 513-series load capacity combined with 532-series self-alignment
Best of Both Series
Combines the heavy cross-section of 513 series with the self-aligning seat of 532 series. High axial load capacity plus 2–3° misalignment compensation in a single bearing — no compromise between load rating and alignment tolerance.
Edge Load Prevention at High Load
Under heavy axial load, even slight misalignment creates extreme edge loading that can brinell raceways within hours. The spherical seat eliminates this failure mode — essential when downtime for bearing replacement costs thousands per hour.
Structural Reliability
The heavy washers and robust aligning seat provide inherent resistance to the shock loads, vibration, and geometric variability of field-assembled heavy equipment. 533 bearings are specified where bearing failure is not an option.
Machined Brass Cage
Large models feature precision-machined brass cages as standard — providing the robust ball guidance needed for the heavy ball complement and high contact forces characteristic of the 533 series. Reliable operation under fluctuating loads and elevated temperatures.
Oil Bath Lubrication Ready
The open design with spherical seat provides generous lubricant access. Oil bath lubrication is standard for medium and large 533 bearings — ensuring adequate lubricant film thickness at the high contact pressures of heavy-load operation.
SKF/NTN/NSK Interchangeable
Direct dimensional replacement for SKF 533, NTN 533, NSK 533, and FAG 533 series. Includes aligning seat. Same heavy-duty self-aligning performance — competitive pricing and engineering support from Luoyang.
Industries & Applications for 533 Series
Trusted across precision industries worldwide for reliable axial load support
Large Crane Hooks
Heavy-lift crane hooks in steel mills, shipyards, and port facilities. 533 bearings support loads exceeding 100 tons while the aligning seat compensates for hook swivel geometry and load-induced structural deflection.
Offshore & Marine Equipment
Offshore crane pedestals, mooring system thrust pads, and platform equipment subject to wave-induced structural flexing. The self-aligning feature actively compensates for platform deflection while maintaining full thrust capacity.
Structural Bridge Bearings
Large bridge expansion and fixed bearings where both high vertical loads (dead + live load) and thermal/settlement-induced angular rotation must be accommodated. 533 bearings provide decades of maintenance-free structural support.
Heavy Rotating Equipment
Mining mill trunnion thrust pads, rotary kiln support rollers, and ball mill thrust bearings. The combination of high load + self-alignment is essential for these large rotating machines where perfect alignment is impossible to achieve or maintain.
Need 533 Series Heavy Self-Aligning Thrust Ball Bearings?
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