What are the exact dimensions of this SKF ball bearing?

The bore diameter is 12 mm (or 12.7 mm / 0.5 inch), the outside diameter is 28.575 mm (1.125 inch), and the width is 7.938 mm (0.3125 inch).

What type of sealing does the SKF R 8-2Z feature?

It features metal shields on both sides (2Z), keeping grease in while protecting against dust and debris.

What type of loads can this deep groove ball bearing handle?

This single-row deep groove ball bearing accommodates both radial and axial loads in both directions.

Does this bearing need lubrication before installation?

No, the bearing is factory pre-greased and designed for maintenance-free operation.

What is the radial internal clearance of this bearing?

This bearing has standard normal radial internal clearance (designated as CN).

SKF R 8-2Z single-row groove ball bearing cylindrical 12.7x28575x7938 mm

Supplier number: SKF R 8-2Z | EAN 7316577104489

Recommended Retail Price €75.03

36.95 tax incl.

€30.54 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered tomorrow 17/10/2026
Shipping costs €11.99 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

Smooth rotation with Skf R 8-2Z

Practical benefits

Dual metal shield protection: Integrated non-contact metal shields keep grease inside while preventing dirt from entering your bearing.
High speed low friction: The optimized raceway geometry allows you to run smoothly with minimal vibration up to 28000 r/min.
Combined load handling: Deep grooves enable your setup to accommodate radial and axial loads across both directions.

In a nutshell

The right choise for

With the Skf r 8-2Z single-row deep groove ball bearing, you keep industrial machinery, electric motors, and power tools running smoothly and reliably. The integrated dual metal shields (2Z) protect internal raceways and balls from dirt and dust while keeping factory grease inside, extending the service life of your setup. Its optimized deep groove design minimizes friction and vibration, allowing high-speed performance up to 28000 r/min while accommodating both radial and axial loads across both directions. Featuring a 12 mm (12.7 mm / 1/2 inch) bore diameter, a 28.575 mm outside diameter, a 7.938 mm width, and standard cn clearance, this pre-greased steel bearing delivers maintenance-free dependability for demanding rotational equipment.

Product information FAQ

€36.95

In stock - tax incl.

Key features according to our expert

Inner diameter: 12 mm
Width: 7,938 mm
Number of rows: 1
Sealing (bearing): Sealed on both sides
Material (bearing seal): Metal
Radial clearance: CN (Normal)
Material (bearing): Steel
Material (cage): Brass (sheet)
Bore type: Cylindrical
High temperature: No
Outer diameter: 28,575 mm

Product description:

Deep groove ball bearings are particularly versatile
They are simple in design, not removable, suitable for high to very high speeds and are very robust in operation, requiring little maintenance
Deep raceways and close contact between raceways and balls make deep groove ball bearings suitable not only for radial loads, but also for axial loads in both directions, even at high speeds

Documents

⤓ Technical data sheet PDF

All Features

Inner diameter: 12 mm
Width: 7,938 mm
Number of rows: 1
Sealing (bearing): Sealed on both sides
Material (bearing seal): Metal
Radial clearance: CN (Normal)
Material (bearing): Steel
Material (cage): Brass (sheet)
Bore type: Cylindrical
High temperature: No
Outer diameter: 28,575 mm
Matched arrangement: No
Tolerance class: Normal
Radial internal clearance: CN
Basic static load rating: 2.36 kN
Material, bearing: Bearing steel
Relubrication feature: Without
Reference speed: 56,000 r/min
Lubricant: Grease
Sealing type: Non-contact
Cage: Sheet metal
Locating feature, bearing outer ring: None
Filling slots: Without
Coating: Without
Sealing: Shield on both sides
Limiting speed: 28,000 r/min
Bore diameter: 12 mm
Basic dynamic load rating: 5.07 kN
Outer diameter: 28.575 mm

Brand SKF
01012139
EAN 7316577104489
Supplier number SKF R 8-2Z

Frequently asked questions about this product

Answered by specialists

What are the exact dimensions of this SKF ball bearing?: The bore diameter is 12 mm (or 12.7 mm / 0.5 inch), the outside diameter is 28.575 mm (1.125 inch), and the width is 7.938 mm (0.3125 inch).
What type of sealing does the SKF R 8-2Z feature?: It features metal shields on both sides (2Z), keeping grease in while protecting against dust and debris.
What type of loads can this deep groove ball bearing handle?: This single-row deep groove ball bearing accommodates both radial and axial loads in both directions.
Does this bearing need lubrication before installation?: No, the bearing is factory pre-greased and designed for maintenance-free operation.
What is the radial internal clearance of this bearing?: This bearing has standard normal radial internal clearance (designated as CN).