What are the exact dimensions of this SKF tapered roller bearing?

The bearing has a 55 mm bore diameter, a 120 mm outside diameter, and a width of 31.5 mm.

What types of loads can this single-row tapered roller bearing handle?

It is designed to accommodate combined heavy radial loads and axial loads acting in one direction.

Can the inner ring be mounted separately from the outer ring?

Yes, the inner ring assembly with rollers and cage is separable from the outer cup for easier installation.

What do the suffixes J2 and Q indicate in the model code?

J2 indicates a pressed sheet steel cage, and Q denotes optimized internal geometry and surface finish.

How do you support axial loads in both directions with this bearing type?

Mount a second single-row tapered roller bearing in opposition and apply preload to achieve rigidity.

SKF 30311 J2/Q single-row tapered roller bearing 55 x 120 x 31.5 mm with contact angle 13° - 30311

Supplier number: SKF 30311 | EAN 7316577327161

Recommended Retail Price €157.17

77.80 tax incl.

€64.30 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Ordered before 20:00 - delivered tomorrow 13/10/2026
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

Dependable performance under heavy loads

Practical benefits

High combined load capacity: You reliably accommodate heavy radial and single-direction axial forces simultaneously with excellent operational stability.
Simple mounting and maintenance: The separable design of this Skf bearing allows you to mount the inner and outer rings independently.
Reduced operational friction: The optimized roller and raceway geometry lowers friction, ensuring you achieve a longer service life.

In a nutshell

The right choise for

With the Skf 30311 J2/Q single-row tapered roller bearing, you reliably accommodate combined heavy radial loads and single-direction axial thrust. Featuring a 55 mm bore, 120 mm outside diameter, and 31.5 mm width, this bearing is suited for industrial gearboxes, vehicle drivetrains, differentials, and heavy rotating machinery. The optimized internal geometry and refined surface finish lower operational friction and heat buildup, extending service life. Its separable design allows for quick, independent mounting and maintenance of the cone and cup. By pairing it in opposition with a second bearing under preload, you achieve precise shaft alignment and high rigidity.

Product information FAQ

€77.80

In stock - tax incl.

Key features according to our expert

Inner diameter: 55 mm
Number of rows: 1
Outer diameter: 120 mm
Width: 31,5 mm

Product description

Single row tapered roller bearings are designed to accommodate combined radial and axial loads and provide low friction during operation. The inner ring, with rollers and cage, can be mounted separately from the outer ring. These separable and interchangeable components facilitate mounting, dismounting and maintenance. By mounting one single row tapered roller bearing against another and applying a preload, a rigid bearing application can be achieved.

Avantages

High radial and axial load carrying capacity
Accommodate axial loads in one direction
Low friction and long service life
Separable and interchangeable components

Documents

⤓ Technical data sheet PDF

All Features

Inner diameter: 55 mm
Number of rows: 1
Outer diameter: 120 mm
Width: 31,5 mm
Bore type: Cylindrical
Cage: Sheet metal
Width, outer ring: 25
Lubricant: None
Arrangement of contact angle (double-row bearing): Not applicable
Reference speed: 4800
Relubrication feature: Without
Matched arrangement: No
Basic static load rating: 163
Bearing part: Complete bearing
Locating feature, bearing outer ring: None
Sealing: Without
Skf performance class: SKF Explorer
Width, inner ring: 29
Width, total: 31.5
Contact angle: 12.95277777781
Limiting speed: 5600
Bore diameter: 55
Basic dynamic load rating: 176
Coating: Without
Outer diameter: 120
Unit system: Metric

Brand SKF
01110034
EAN 7316577327161
Supplier number SKF 30311

Frequently asked questions about this product

Answered by specialists

What are the exact dimensions of this SKF tapered roller bearing?: The bearing has a 55 mm bore diameter, a 120 mm outside diameter, and a width of 31.5 mm.
What types of loads can this single-row tapered roller bearing handle?: It is designed to accommodate combined heavy radial loads and axial loads acting in one direction.
Can the inner ring be mounted separately from the outer ring?: Yes, the inner ring assembly with rollers and cage is separable from the outer cup for easier installation.
What do the suffixes J2 and Q indicate in the model code?: J2 indicates a pressed sheet steel cage, and Q denotes optimized internal geometry and surface finish.
How do you support axial loads in both directions with this bearing type?: Mount a second single-row tapered roller bearing in opposition and apply preload to achieve rigidity.