What are the dimensions of this ball bearing?

This ball bearing has a 12 mm bore diameter, a 21 mm outside diameter, and a width of 5 mm.

What protection does the 2RS1 seal provide?

The 2RS1 suffix designates contact rubber seals on both sides, keeping grease inside while shielding against dirt and moisture.

What internal radial clearance does this bearing have?

This SKF bearing has a standard CN (normal) radial internal clearance.

What loads can this deep groove ball bearing handle?

Its single-row design accommodates both radial and axial loads in both directions.

Does this bearing require lubrication before installation?

No, it comes pre-greased and sealed on both sides for maintenance-free operation.

SKF 61801-2RS1 single-row groove ball bearing cylindrical 12x21x5 mm

Supplier number: SKF 61801-2RS1 | EAN 7316577611505

Recommended Retail Price €37.35

18.40 tax incl.

€15.21 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered as of 13/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

↓ Documents (1) ✆ Talk to a specialist

Smooth operation with Skf reliability

Practical benefits

Superior protection against contaminants: The dual rubber contact seals retain lubricant inside while shielding your bearing from dirt and moisture ingress.
Low friction smooth running: You achieve efficient high-speed rotation with reduced vibration and quiet running performance across varied applications.
Combined radial axial support: The durable steel deep-groove geometry easily accommodates both radial and axial loads in both directions.

In a nutshell

The right choise for

With the Skf 61801-2RS1 single-row deep groove ball bearing, you ensure smooth and reliable rotation in space-constrained assemblies. Engineered from durable steel with a 12 mm bore, 21 mm outer diameter, and 5 mm width, it easily accommodates radial and axial loads in both directions. The dual-sided 2RS1 rubber contact seals keep the factory grease sealed inside while actively protecting against dust, dirt, and moisture ingress for entirely maintenance-free operation. Thanks to low friction and optimized raceways, your equipment runs quietly and efficiently at high rotational speeds, making it ideal for precision machinery, small electric motors, and bicycle hubs.

Product information FAQ

€18.40

In stock - tax incl.

Key features according to our expert

Inner diameter: 12 mm
Width: 5 mm
Number of rows: 1
Sealing (bearing): Sealed on both sides
Material (bearing seal): Rubber
Radial clearance: CN (Normal)
Material (bearing): Steel
Material (cage): Brass (sheet)
Bore type: Cylindrical
High temperature: No
Outer diameter: 21 mm

Product description

Single row deep groove ball bearings with seals or shields are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.

Integral sealing prolongs bearing service life
Simple, versatile and robust design
Low friction and high-speed capability
Accommodate radial and axial loads in both directions
Require little maintenance

Documents

⤓ Technical data sheet PDF

All Features

Inner diameter: 12 mm
Width: 5 mm
Number of rows: 1
Sealing (bearing): Sealed on both sides
Material (bearing seal): Rubber
Radial clearance: CN (Normal)
Material (bearing): Steel
Material (cage): Brass (sheet)
Bore type: Cylindrical
High temperature: No
Outer diameter: 21 mm
Matched arrangement: No
Tolerance class: Normal
Radial internal clearance: CN
Basic static load rating: 0.92
Material, bearing: Bearing steel
Relubrication feature: Without
Lubricant: Grease
Sealing type: Contact
Cage: Sheet metal
Locating feature, bearing outer ring: None
Filling slots: Without
Coating: Without
Sealing: Seal on both sides
Limiting speed: 20000
Bore diameter: 12
Basic dynamic load rating: 1.74
Outer diameter: 21

Brand SKF
01011265
EAN 7316577611505
Supplier number SKF 61801-2RS1

Frequently asked questions about this product

Answered by specialists

What are the dimensions of this ball bearing?: This ball bearing has a 12 mm bore diameter, a 21 mm outside diameter, and a width of 5 mm.
What protection does the 2RS1 seal provide?: The 2RS1 suffix designates contact rubber seals on both sides, keeping grease inside while shielding against dirt and moisture.
What internal radial clearance does this bearing have?: This SKF bearing has a standard CN (normal) radial internal clearance.
What loads can this deep groove ball bearing handle?: Its single-row design accommodates both radial and axial loads in both directions.
Does this bearing require lubrication before installation?: No, it comes pre-greased and sealed on both sides for maintenance-free operation.