What are the dimensions of this needle roller bearing?

The bore diameter is 42 mm, the outside diameter is 52 mm, and the width is 20 mm.

Why does this bearing have no inner ring?

It runs directly on a hardened and ground shaft raceway, creating a very compact assembly.

Is this SKF needle roller bearing sealed?

No, this is an open bearing without seals and requires external lubrication.

What material is the cage made of?

The cage of this bearing is made of sheet steel.

Can this bearing be relubricated?

Yes, the outer ring features an annular groove and lubrication holes for easy relubrication.

SKF NK 42/20 needle roller bearing without inner ring 42x52x20 mm

Supplier number: SKF NK 42/20 | EAN 7316577120939

Recommended Retail Price €81.69

40.40 tax incl.

€33.39 excl. VAT (incl. all environmental contributions)

On order: delivered from 22/10/2026

Delivery by DHL

↓ Documents (1) ✆ Talk to a specialist

Compact radial performance for tight spaces

Practical benefits

Proven Skf engineering: You achieve dependable radial load capacity with a solid machined outer ring and robust sheet steel cage.
Space saving innerless design: You run the rollers directly on a hardened shaft, saving valuable space in compact machinery assemblies.
Effortless lubrication maintenance: The outer ring features a lubrication groove with holes, allowing you to relubricate the bearing efficiently.

In a nutshell

The right choise for

With the Skf nk 42/20 single-row needle roller bearing, you achieve high radial load support in tight spaces. Because this design comes without an inner ring, the sheet steel cage assembly runs directly on a hardened and ground shaft raceway, saving critical mounting space in gearboxes, transmissions, and hydraulic pumps. The solid outer ring with integral flanges provides accurate guidance and features a lubrication groove with holes for fast, straightforward relubrication. With dimensions of 42X52X20 mm, you can easily integrate this open bearing into compact mechanical drive systems.

Product information FAQ

€40.40

tax incl.

Key features according to our expert

Inner diameter: 42 mm
Width: 20 mm
Sealing (bearing): Without seals
Material (bearing seal): Not applicable
Number of rows: 1
Material (cage): Sheet steel
Outer diameter: 52 mm

Product description

Single row needle roller bearings without an inner ring consist of an outer ring with a needle roller and cage assembly. They are an excellent choice for compact bearing arrangements in applications where hardened and ground raceways can be provided on the shaft. The outer ring includes two integral flanges to guide the bearing axially and an annular groove with one or more lubrication holes to facilitate relubrication.

Avantages

High radial load carrying capacity
High stiffness
Low cross-sectional height
Accommodate axial displacement in both directions

Documents

⤓ Technical data sheet PDF

All Features

Inner diameter: 42 mm
Width: 20 mm
Sealing (bearing): Without seals
Material (bearing seal): Not applicable
Number of rows: 1
Material (cage): Sheet steel
Outer diameter: 52 mm
Bore diameter of needle roller complement: 42 mm
Tolerance class: Normal
Aligning feature: Without
Basic static load rating: 53 kN
Lubricant: None
Relubrication feature: With
Reference speed: 9,500 r/min
Sealing: Without
Seal type: Not applicable
Cage: Sheet steel
Bearing part: Bearing without inner ring
Number of flanges, outer ring: 2
Outer ring type: Machined (solid)
Limiting speed: 11,000 r/min
Basic dynamic load rating: 27 kN
Coating: Without
Outer diameter: 52 mm
Material, bearing: Bearing steel

Brand SKF
01291482
EAN 7316577120939
Supplier number SKF NK 42/20

Frequently asked questions about this product

Answered by specialists

What are the dimensions of this needle roller bearing?: The bore diameter is 42 mm, the outside diameter is 52 mm, and the width is 20 mm.
Why does this bearing have no inner ring?: It runs directly on a hardened and ground shaft raceway, creating a very compact assembly.
Is this SKF needle roller bearing sealed?: No, this is an open bearing without seals and requires external lubrication.
What material is the cage made of?: The cage of this bearing is made of sheet steel.
Can this bearing be relubricated?: Yes, the outer ring features an annular groove and lubrication holes for easy relubrication.