NU312 Single‑row Cylindrical Roller Bearing 60×130×31mm High‑speed For Industrial Transmission Equipment
NU312 is an open‑type single‑row cylindrical roller bearing with dimensions 60×130×31mm. It has two ribs on the outer ring and rib‑free inner ring, allowing free axial floating movement between shaft and housing. Manufactured from high‑quality GCr15 chrome steel, this separable‑structure bearing delivers powerful heavy radial‑load capacity and stable high‑speed performance, widely used as floating‑end bearing for large‑size electric motors, heavy‑duty gearboxes and various industrial transmission machinery.
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| Item | Specification |
|---|---|
| Model | NU312 |
| Bearing Type | Single‑row Cylindrical Roller Bearing, NU‑type Floating Bearing |
| Inner Diameter (d) | 60 mm |
| Outer Diameter (D) | 130 mm |
| Width (B) | 31 mm |
| Basic Dynamic Load(Cr) | 123 KN |
| Basic Static Load(C0r) | 126 KN |
| Weight | 1.82 kg |
| Internal Clearance | CN Normal Clearance |
| Seal Type | Open‑type No Seal |
| Material | GCr15 Chrome Steel |
| Precision Rating | P0 / P6 |
| Limiting Speed(Grease) | 4800 r/min |
| Limiting Speed(Oil) | 5600 r/min |
| Cage Material | Stamped Steel Cage |
- High radial load‑carrying capacity with line‑contact roller‑raceway structure
- Floating design permits bidirectional axial displacement to absorb shaft thermal expansion
- Fully separable inner and outer rings for easy installation inspection and replacement
- Open‑type structure supports convenient oil lubrication and regular maintenance
- Low‑friction rolling elements ensure smooth high‑speed and low‑vibration operation
- Hardened chrome‑steel components deliver excellent wear‑resistance and long service life
- Industrial gearboxes and speed reducer transmission systems
- Large and medium‑sized electric motors and generator equipment
- Hydraulic pumps, blowers and industrial fan assemblies
- Machine‑tool auxiliary shafts and light‑duty spindle units
- Conveyor machinery and material‑handling transmission parts
- General‑purpose high‑speed mechanical power‑transmission devices
*Send your requirements, GQZ provides stock bearings & OEM service.
- 30 years professional bearing industry experience
- ISO certified strict quality inspection
- Flexible OEM & private label customization
- 3-5 days fast delivery for stocked bearings
- Full bearing series, universal interchangeable size
- Factory direct price & reliable after-sales service
*Cooperate with GQZ for high‑quality bearings and competitive factory prices.
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