Cylindrical Roller Bearings
NU, NJ, NUP series cylindrical roller bearings for high radial rigidity. Optimized for gearboxes, electric motors, machine tool spindles, and heavy-load industrial drives.
Cylindrical Roller Bearings
Cylindrical roller bearings provide the highest radial load capacity of any rolling bearing type for a given envelope. With line contact between rollers and raceways, they excel in applications demanding high radial rigidity, precision, and speed capability.
Series Overview
| Series | Configuration | Axial Load | Typical Use |
|---|---|---|---|
| NU | Two ribs on outer ring, no ribs on inner | Axial displacement both directions | Non-locating position |
| NJ | Two ribs on outer, one rib on inner | One direction only | Locating position |
| NUP | Two ribs on outer, one rib + loose rib on inner | Both directions (limited) | Locating position |
Key Advantages
- Highest radial capacity: Line contact distributes load over larger area than ball bearings
- Low friction: Optimized roller and raceway profiles minimize heat generation
- High speed capable: Suitable for high-speed applications with proper lubrication
- Separable design: Inner and outer rings can be mounted independently, simplifying assembly
- Brand-reference review: ISO boundary dimensions may support comparison with major brands, but locating function, suffix, tolerance, and application must be checked
Applications
- Gearboxes: High-speed and low-speed shafts
- Electric motors: Medium and large frame sizes
- Machine tools: Spindle support bearings
- Pumps and compressors: Rotor support
- Steel mill rolls: Backup and work roll bearings
RFQ Notes
For brand comparison or replacement, send the NU/NJ/NUP type, full model number, shaft role, load, speed, quantity, and destination. TFL Bearing can review suitable China supply options, document needs, and consolidated shipment routes.
RFQ Details to Send
Send these details so TFL Bearing can review the model, suffix, cage, clearance, bore type, application, documents, and quotation route before confirming current availability or production options.
| RFQ detail | Example | Why it matters |
|---|---|---|
| full bearing model | 22222 EK/C3 W33, 22320 CAK/W33, or photo of the full marking | Identifies the series, size group, bore style, clearance reference, and starting point for quotation review. |
| full suffix / marking | K, K30, C3, C4, W33, CA, CC, MB, 2RS, or full ring marking photo | Suffixes can change bore type, clearance, cage design, lubrication groove, sealing, and replacement risk. |
| cage type | CA machined brass, CC stamped steel, MB machined brass, or unknown with photo | Cage design affects load, vibration tolerance, lubrication behavior, and suitability for screen or crusher duty. |
| clearance class | CN, C3, C4, C5, or current suffix if the clearance is not separately known | Clearance must be reviewed with shaft fit, temperature, vibration, speed, and failure history. |
| bore type | Cylindrical bore, K 1:12 tapered bore, K30 1:30 tapered bore, adapter sleeve reference | Bore style changes mounting method, sleeve requirements, shaft fit review, and replacement compatibility. |
| application equipment | crusher, vibrating screen, fan, gearbox, conveyor pulley, paper machine, or steel mill position | Application context affects load, shock, speed, contamination, lubrication, and document review. |
| quantity | 1 large bearing, 2 pcs for maintenance, 50 pcs distributor stock, or annual demand | Quantity affects quote route, packing, production planning, inspection scope, and freight review. |
| destination | Destination country, port, warehouse, distributor address, or project site region | Destination affects export documents, packing method, shipping route, and trade-term review. |
| required documents | Inspection report, material certificate, COO, RoHS / REACH statement, packing photos, buyer template | Document requirements must be confirmed before quotation because scope depends on order route and buyer template. |
| target timing | Maintenance shutdown date, urgent repair, trial order timing, or normal replenishment schedule | Timing helps separate availability review, production planning, sample validation, and consolidated shipment options. |
Request Cylindrical Roller Series RFQ Review
Send us your specifications, drawings, and target quantities. TFL Bearing can review model fit, China supply options, available documents, and quotation details before confirming availability, production, or shipment timing.