NU3xx Series (Medium)
Structure: Single Row / Removable Outer Ring (Medium Series)
Bore Type: Cylindrical
Precision: P0, P6, P5
Cage: Steel / Brass / PA66
Clearance: C0, C2, C3, C4
Bore Range: 10mm – 150mm
Application: Heavy electric motors, gearboxes, compressors, mining equipment
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The NU3xx Series Medium cylindrical roller bearings deliver enhanced load capacity with a wider cross-section design. Their robust construction withstands demanding operating conditions including heavy shock loads and vibration. Trusted in heavy electric motors, industrial compressors, gearboxes, and mining equipment where reliability under severe conditions is paramount.
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) |
|---|---|---|---|---|---|---|---|
| NU304 | 20 | 52 | 15 | 36.5 | 28.0 | 15000 | 0.16 |
| NU305 | 25 | 62 | 17 | 44.5 | 35.0 | 13000 | 0.26 |
| NU306 | 30 | 72 | 19 | 55.0 | 44.0 | 11000 | 0.4 |
| NU307 | 35 | 80 | 21 | 67.5 | 55.0 | 9500 | 0.56 |
| NU308 | 40 | 90 | 23 | 81.5 | 66.0 | 8500 | 0.8 |
| NU309 | 45 | 100 | 25 | 97.0 | 79.0 | 7500 | 1.1 |
| NU310 | 50 | 110 | 27 | 112.0 | 93.0 | 6700 | 1.4 |
| NU311 | 55 | 120 | 29 | 132.0 | 112.0 | 6000 | 1.8 |
| NU312 | 60 | 130 | 31 | 150.0 | 128.0 | 5600 | 2.2 |
| NU313 | 65 | 140 | 33 | 170.0 | 145.0 | 5000 | 2.75 |
| NU314 | 70 | 150 | 35 | 195.0 | 170.0 | 4800 | 3.35 |
| NU315 | 75 | 160 | 37 | 212.0 | 190.0 | 4500 | 4.1 |
| NU316 | 80 | 170 | 39 | 245.0 | 220.0 | 4300 | 4.9 |
| NU317 | 85 | 180 | 41 | 270.0 | 245.0 | 4000 | 5.85 |
| NU318 | 90 | 190 | 43 | 295.0 | 270.0 | 3800 | 6.9 |
| NU319 | 95 | 200 | 45 | 325.0 | 300.0 | 3600 | 8.1 |
| NU320 | 100 | 215 | 47 | 365.0 | 340.0 | 3400 | 10.0 |
