What are the dimensions of this bearing?

The bearing has a 40 mm bore diameter, a 90 mm outer diameter, and a 23 mm width.

What does the C4 clearance designation mean?

C4 indicates greater internal radial clearance than standard and C3, ideal for high operating temperatures or tight fits.

What loads can the NJ design accommodate?

It supports high radial loads and can accommodate axial displacement of the shaft in one direction.

What material is the cage made of?

This model features a polyamide plastic cage (ECP).

Is this cylindrical roller bearing sealed?

No, this bearing has an open design without seals.

SKF NJ 308 ECP/C4 single-row cylindrical roller bearing 40 x 90 x 23 mm

Supplier number: SKF NJ 308 ECP/C4 | EAN 7316570439144

Recommended Retail Price €212.00

104.80 tax incl.

€86.61 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 3 products in stock.

Ordered before 20:00 - delivered as of 16/10/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

↓ Documents (1) ✆ Talk to a specialist

Reliable performance under demanding radial loads

Practical benefits

High radial load capacity: You accommodate heavy radial forces smoothly thanks to the robust single-row roller configuration.
Superior thermal expansion tolerance: The increased C4 internal clearance of this Skf bearing prevents jamming under high-temperature conditions.
Fast and simple installation: The separable inner ring design lets you mount and service individual components quickly.

In a nutshell

The right choise for

With the Skf nj 308 ECP/C4 single-row cylindrical roller bearing, you reliably handle heavy radial loads in industrial gearboxes and electric motors. Its increased C4 internal radial clearance prevents jamming and excessive preload caused by thermal expansion or tight fits. The nj design delivers dependable one-directional axial shaft guidance, while the lightweight polyamide cage reduces friction. Featuring dimensions of 40 x 90 x 23 mm and a separable inner ring, this unsealed bearing ensures quick mounting and hassle-free maintenance across your rotating machinery.

Product information FAQ

€104.80

In stock - tax incl.

Key features according to our expert

Inner diameter: 40 mm
Width: 23 mm
Number of rows: 1
Radial clearance: C4
Material (cage): Plastic
Sealing (bearing): Without seals
Material (bearing seal): Not applicable
Bore type: Cylindrical
Outer diameter: 90 mm

Product description

Single row cylindrical roller bearings are designed to accommodate high radial loads in combination with high speeds. Having two integral flanges on the outer ring and one on the inner ring, NJ design bearings can accommodate axial displacement in one direction. An important feature is the separable design, which facilitates mounting and enables the bearing components to be interchanged.

High radial load carrying capacity
Low friction
Long service life
Locate the shaft axially in one direction
Separable design

Documents

⤓ Technical data sheet PDF

All Features

Inner diameter: 40 mm
Width: 23 mm
Number of rows: 1
Radial clearance: C4
Material (cage): Plastic
Sealing (bearing): Without seals
Material (bearing seal): Not applicable
Bore type: Cylindrical
Outer diameter: 90 mm
Relubrication feature: Without
Tolerance class: Normal
Radial internal clearance: C4
Loose flange: None
Basic static load rating: 78
Cage: Non-metallic
Reference speed: 8000
Skf performance class: SKF Explorer
Lubricant: None
Locating feature, bearing outer ring: None
Number of flanges, inner ring: 1
Bearing part: Complete bearing
Sealing: Without
Number of flanges, outer ring: 2
Limiting speed: 9500
Bore diameter: 40
Basic dynamic load rating: 93
Coating: Without
Outer diameter: 90
Axial displacement capability: In one direction

Brand SKF
01070925
EAN 7316570439144
Supplier number SKF NJ 308 ECP/C4

Frequently asked questions about this product

Answered by specialists

What are the dimensions of this bearing?: The bearing has a 40 mm bore diameter, a 90 mm outer diameter, and a 23 mm width.
What does the C4 clearance designation mean?: C4 indicates greater internal radial clearance than standard and C3, ideal for high operating temperatures or tight fits.
What loads can the NJ design accommodate?: It supports high radial loads and can accommodate axial displacement of the shaft in one direction.
What material is the cage made of?: This model features a polyamide plastic cage (ECP).
Is this cylindrical roller bearing sealed?: No, this bearing has an open design without seals.