# 1211 NSK Self Aligning Ball Bearing Open (55x100x21) Made in JAPAN

**Self-Aligning Ball Bearings**  
Self-aligning ball bearings are designed with two rows of balls and a common spherical raceway in the outer ring. This allows the bearing to automatically adjust and compensate for misalignment or shaft deflection, maintaining smooth operation even when the shaft is not perfectly aligned with the housing. They are commonly used in applications where shaft bending or mounting errors may occur.

**Key Features:**

-   **Two rows of balls** with a **common spherical outer raceway**
    
-   Automatically compensates for **shaft misalignment and deflection**
    
-   Handles **radial loads** and limited **axial loads** in both directions
    
-   **Low friction** and suitable for **moderate-speed** applications
    
-   Available with **cylindrical or tapered bores** for easy mounting
    
-   Requires **less maintenance** due to self-aligning capability
    
-   Commonly used in **agricultural machinery, conveyors, and textile equipment**
    

**SKU**

1211-NSK

**Brand**

NSK

**Shipping Weight**

0.7050kg

**Seal**

Open

**Norm.**

DIN 630

**Min. Operating Temperature (deg. C)**

\-­40°C

**Max. Operating Temperature (deg. C)**

+150°C

**Lifetime Lubricated**

No

**Type Of Lubrication**

Oiled

**Cage Material**

Sheet Steel

**Rolling Element Material**

Rolling Bearing Steel

**Ring Material**

Rolling Bearing Steel

**Grade**

Premium

**Speed Rating**

V (Normal)

**Precision Class**

P0 (Normal Precision)

**(B) Width (mm)**

21

**(D) Outside Ø (mm)**

100

**(d) Inside Ø (mm)**

55

**Radial Internal Clearance**

CN (Normal)

**Bore**

Cylindrical

[![](https://www.refast.com.au/assets/alt_14/1211-NSK.png?20251031093342)](https://www.refast.com.au/assets/alt_14/1211-NSK.png?20251031093342)

[**Contact us**](https://australianempire.com.au/pages/contact) if you have any questions — we're happy to help.

## Details

- **Price:** 59.87 AUD
- **Vendor:** Australian Empire Shop

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 59.87 AUD | In stock |

## Images

- Precision ball bearing for tractor and truck parts, durable metal construction
- Technical diagram of ball bearing dimensions for tractor or truck parts applications

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> Source: [Australian Empire Shop](https://australianempire.com.au/products/1211-nsk-self-aligning-ball-bearing-open-55x100x21-made-in-japan)
> Updated: 2026-09-03