20mm to 100mm bore
NU Series
Allows free axial movement of the shaft relative to the housing.
Enquire NowCylindrical Roller Bearings
High radial load capacity bearings for gearboxes, motors and machine spindles, with several cage configurations allowing controlled axial shaft movement where needed.
Product Range
Series We Stock
Cylindrical roller bearings across NU, NJ and NUP configurations.
20mm to 100mm bore
NUP Series
Bidirectional axial location for locating positions on a shaft.
Enquire Now Select sizes
Full Complement Variants
Cageless design for maximum radial load capacity at lower speed.
Enquire Now Specifications
Typical Specifications
Representative ranges across the stocked cylindrical roller range.
Standard Reference
ISO 15 boundary dimensions
- Bore diameter
- 20 mm to 100 mm
- Configuration
- NU, NJ, NUP
- Cage material
- Steel or brass
- Internal clearance
- C3 common for motors
- Load type
- High radial, limited/no axial
- Precision class
- P0, P6 on request
- Temperature range
- -20 C to +120 C
- Row configuration
- Single or double row
Our Brands
Brands For
This Range
Stocked across our general bearing brand range.
Buying Guide
Specifying Cylindrical Roller Bearings
Choosing the right configuration.
Step 01
Decide on axial location
NU allows free float, NJ locates one direction, NUP locates both, match to your shaft's locating requirement.
Step 02
Check radial clearance
C3 clearance is standard for motor applications running hot on the inner ring.
Step 03
Confirm cage type
Full complement variants trade speed capability for higher radial load rating.
Standards
Standards and Quality
Dimensional standards for this bearing family.
ISO 15
Boundary Dimensions
Standard interchangeable dimensions across manufacturers.
DIN 5412
Cylindrical Roller Bearings
German dimensional standard for this bearing type.
ISO 5753
Internal Clearance
Governs standard and C3 clearance classifications.
Traceable
Batch Marked
Brand and batch marking on every unit supplied.
Applications
Common Applications
Typical mounting points for this bearing type.
01
Gearbox Shafts
Intermediate shaft positions with pure radial load.
02
Motor Non-Drive Ends
Larger frame motors needing high radial capacity.
03
Machine Spindles
Radial support in combination with angular contact thrust bearings.
04
Rolling Mill Stands
Roll neck bearings under continuous heavy radial load.
05
Traction Motors
Rail and heavy vehicle traction motor bearings.
06
Vibrating Motors
High radial load under continuous vibration.
Industries
Industries We Serve
Where high radial load capacity is the priority.
Gearbox Manufacturing
Intermediate shaft bearings carrying pure radial load.
Electric Motor Manufacturing
Non-drive end bearings on larger frame motors.
Machine Tool Builders
Spindle radial support bearings.
Steel and Rolling
Roll stand bearings under continuous radial load.
FAQ
Frequently Asked Questions
Common questions about cylindrical roller bearings, answered by our counter team.
What is the difference between NU and NUP?
NU allows the inner and outer ring to float axially relative to each other, NUP adds a removable flange that locates the shaft in both directions.
Can this bearing take axial load?
NU takes none, NJ takes load in one direction only, NUP takes load in both directions but at a lower rating than a dedicated thrust bearing.
Why does my motor bearing need C3 clearance?
Motor inner rings run hotter than outer rings during operation, C3 clearance compensates so the bearing does not run tight at operating temperature.
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