51120 Stamping Steel Cage, Bore 100 Mm, Axial Deep Groove Ball Bearings, Single Direction
The 51120 Thrust ball bearings are widely used in various small and medium-sized equipment requiring axial load capacity, including: automotive steering systems, machine tool spindles, industrial gearboxes, crane hooks, centrifuges, and precision instruments.
The 51120 bearing is a Axial deep groove ball bearings, Single direction with an inner diameter of 100 mm , an outer diameter of 135 mm, a width of 25 mm. It typically uses PN (ABEC-1) grade precision tolerances and GCr15, GCr15SiMn rings, GCr15, GCr15SiMn rolling mlement. Its dynamic axial rated load is approximately 84610 N, its static axial rated load is approximately 269607 N. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: NSK 51120, KOYO 51120, NACHI 51120, FAG 51120, SKF 51120, STEYR 51120, SNR 51120, RHP 51120, NTN 51120,
51120 bearings ( 100 mm x 135 mm x 25 mm) have the advantages of Suitable for high-speed applications, capable of withstanding unidirectional axial loads, with low friction and easy installation, and are therefore widely used in the Machine tool spindles, automotive steering systems, pumps, industrial machinery and instruments.
| Part Number | 51120 |
| Bearing Type | Axial deep groove ball bearings, Single direction |
| Interchangeable | FAG 51120 |
| Cage | JP = Stamping steel cage |
| Accuracy class | PN (ABEC-1) |
| Series [lb] | 511 series (511) |
| Bearing Mass - m | 2.7778 |
| Dimension | |
| Inside - d φ [inch] | 3.9370 |
| Outside - D Φ [inch] | 5.3150 |
| Thickness - T [inch] | 0.9843 |
| D1 [inch] | 4.0157 |
| d1 [inch] | 5.3150 |
| chamfer - r(min.) [inch] | 0.0394 |
| Performance | |
| Dynamic Axial - Ca [lbf] | 19020 |
| Static Axial - C0a [lbf] | 60607 |
| Fatigue Axial - Cua [lbf] | 2914 |
| Speed ratings (grease) - nB [min–1] | 3079 |
| Speed ratings (oil) - nG [min–1] | 3187 |
| Mounting dimensions | |
| da(min.) [inch] | 4.7638 |
| Da(max.) [inch] | 4.4882 |
| ra(max.) [inch] | 0.0394 |
| Minimum load coefficient | |
| A | 0.36 |
The 51120 Thrust ball bearings mainly consist of a shaft ring (which mates with the shaft), a housing ring (which mates with the bearing housing), steel balls, and a cage. They feature a separable design for easy installation and maintenance. Some models include dust covers or sealed structures.
Thrust ball bearings have high axial load capacity, are suitable for bearing pure axial loads, have high limiting speeds, low friction coefficients, and smooth operation. Their separable structure simplifies installation, results in a compact size, and minimizes space requirements.
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