31300 Series (Metric Single Row)
Material: Chrome Steel (Gcr15) / Case-Hardened Steel
Structure: Single Row / Metric / Steep Angle
Precision: P0, P6, P5
Cage: Pressed Steel
Clearance: C2, C0, C3 (Axial)
Bore Range: 25mm – 90mm
Application: High-axial-load gearboxes, railway axle boxes, vertical shaft applications
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The 31300 Series metric single-row tapered roller bearings feature a steep contact angle for maximum axial load capacity. The increased cone angle prioritizes thrust handling while maintaining robust radial support, making them ideal for high-axial-load gearboxes, railway axle box assemblies, and vertical shaft configurations where thrust forces dominate.
Technical Specifications
| Bearing No. | Bore (d) mm | Outer Dia. (D) mm | Width (B) mm | Dyn. Load Cr (kN) | Stat. Load Cor (kN) | Ref. Speed (rpm) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 31305 | 25 | 62 | 18.25 | 52 | 55 | 6700 | 0.29 |
| 31306 | 30 | 72 | 20.75 | 65.5 | 72 | 6000 | 0.42 |
| 31307 | 35 | 80 | 22.75 | 79.2 | 88 | 5300 | 0.57 |
| 31308 | 40 | 90 | 25.25 | 93 | 105 | 4800 | 0.81 |
| 31309 | 45 | 100 | 27.25 | 115 | 130 | 4300 | 1.1 |
| 31310 | 50 | 110 | 29.25 | 138 | 158 | 3800 | 1.42 |
| 31311 | 55 | 120 | 31.5 | 158 | 183 | 3400 | 1.82 |
| 31312 | 60 | 130 | 33.5 | 180 | 210 | 3200 | 2.22 |
| 31313 | 65 | 140 | 36 | 205 | 242 | 2800 | 2.8 |
| 31314 | 70 | 150 | 38 | 230 | 272 | 2600 | 3.4 |
