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Cylindrical Roller Bearing Supplier

Cylindrical Roller Bearing Supplier

Enduring Extreme Radial Load Forces

Cylindrical roller bearings have linear line contact between the rollers and raceways, enabling them to support significantly higher radial loads compared to ball bearings of similar sizes. They are highly rigid under radial stress.

These bearings are available in various rib configurations: NU style (separable outer ring, radial loads only), NJ style (supports single-direction axial guides), and NUP style (fully locating axial guide). We offer these in standard clearances or C3 thermal clearance variants to survive high gearbox temperatures.

Cylindrical Roller Bearings Category
Radial Loading Sizing Chart

Technical Specifications & Sizing

Standard dimensional parameters for popular NU and NJ metric series.

Bearing Model Bore (d) Outer Dia (D) Width (B) Dynamic Load (Cr) Static Load (Cor) Limiting Speed (Oil) Style Guide
NU 205 E 25 mm 52 mm 15 mm 32.5 kN 28.5 kN 13,000 RPM Non-Locating (NU)
NU 208 E 40 mm 80 mm 18 mm 56.2 kN 52.0 kN 8,500 RPM Non-Locating (NU)
NU 210 E 50 mm 90 mm 20 mm 69.3 kN 69.5 kN 7,200 RPM Non-Locating (NU)
NU 310 E 50 mm 110 mm 27 mm 110.0 kN 108.0 kN 6,300 RPM Non-Locating (NU)
NU 312 E 60 mm 130 mm 31 mm 153.0 kN 150.0 kN 5,300 RPM Non-Locating (NU)
NJ 2206 E 30 mm 62 mm 20 mm 48.5 kN 48.0 kN 9,500 RPM One-Way locating (NJ)
NJ 2210 E 50 mm 90 mm 23 mm 86.5 kN 95.0 kN 6,700 RPM One-Way locating (NJ)
NUP 315 E 75 mm 160 mm 37 mm 236.0 kN 250.0 kN 4,300 RPM Two-Way locating (NUP)

* "E" suffix indicates optimized internal design with larger or more rollers, offering higher load ratings.

Engineering Insights

Bearing Nomenclature & Clearance Guide

Understanding the technical suffixes, clearance prefixes, and material ratings used in industrial procurement.

Suffix & Prefix Reference

  • NU / NJ / NUP: Double rib outer/free inner (NU), single rib inner (NJ), or inner with collar (NUP).
  • EC: Optimized internal design with larger/more rollers for maximum dynamic load rating.
  • M / MA: Machined brass cage, outer ring guided (M) or inner ring guided (MA) for high speed.
  • TVP2 / TVP: Glass fiber reinforced polyamide cage (PA66) for quiet, low-temperature running.

Radial Internal Clearance (RIC)

  • C2 (Tight): Low radial clearance; typically used for machine tool spindles to ensure rigidity.
  • CN (Normal): Standard radial clearance for industrial gearboxes and generic electric motors.
  • C3 (Loose): Greater than normal clearance; absorbs press-fits expansion and temperature rises.
  • C4 / C5: Massive radial clearance for high-heat continuous steel mills and mining shafts.
Technical Guide

Bearing Selection & Sizing Guide

Critical engineering parameters, structure details, and operating limits to help you select the ideal component.

Linear Line Contact

Cylindrical rollers provide linear contact rather than point contact. This structural profile maximizes radial load carrying capacity, radial stiffness, and load distribution under heavy shock forces.

Rib Configurations

NU designs permit axial displacement in both directions (free end). NJ designs locate the shaft in one direction, while NUP designs feature a loose collar to locate the shaft in both directions.

Industrial Applications

Specifically engineered for heavy-duty electric motors, traction gearboxes, industrial pumps, and mining equipment. Supports extremely high radial loads but is restricted to minimal or zero axial thrust.

Target Environments

Common Industrial Applications

These bearings are engineered to deliver reliable rotation and support critical equipment in harsh sectors, including:

Heavy Transmissions

Used inside industrial gearboxes and speed reducers to carry extreme radial forces under torque.

Traction Motors

Supports rail locomotive generators and heavy electric motors requiring high mechanical load limits.

Industrial Pumps

Ensures rigid shaft support in high-pressure water pumps and mining slurry equipment.

Steel & Paper Mills

Withstands continuous load inside roller presses, mill dryers, and calender rolls.

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FAQ

Frequently Asked Questions

Technical details, selection parameters, and service queries resolved by our engineering sales team.

Standard designs like the NU type handle radial loads only. However, modified designs such as NJ or NUP feature ribs on the inner/outer rings that allow them to locate the shaft and carry light, intermittent axial thrust.
NU bearings have ribs on the outer ring only (shaft moves axially). NJ bearings have ribs on both rings, locating the shaft in one direction. NUP bearings feature a loose rib collar, enabling bi-directional axial location.
At high speeds, if the radial load is too light, the rollers will slide instead of roll, causing friction smears on the raceways. A minimum load ensures rolling contact.