NSK 1211 K Self-Aligning Ball Bearing 55x100x21

Applications

The NSK 1211 K self-aligning ball bearing (55x100x21 mm) is designed for industrial applications requiring compensation for shaft misalignment. Its double-row ball construction and spherical outer race allow smooth operation even under angular misalignment, making it ideal for bearing housings, machine units, and heavy-duty assemblies.

This bearing ensures long-term performance in machinery, conveyors, pumps, and transmission systems where both radial and moderate axial loads occur. The NSK brand guarantees precision, reduced maintenance, and consistent operation even in challenging industrial environments.

Advantages

• Self-aligning design - automatically compensates for misalignment between shaft and housing, preventing premature wear.

• High durability - manufactured from premium bearing steel with advanced heat treatment for extended service life.

• Smooth and quiet operation - minimizes vibration and noise, improving system stability and energy efficiency.

• Universal mounting compatibility - suitable for integration into standard bearing housings or complete bearing units.

• Low maintenance requirement - excellent for automated systems and high-load applications where reliability is essential.

Technical Data

• Type: Self-Aligning Ball Bearing

• Model: NSK 1211 K

• Dimensions: Inner diameter (d) = 55 mm, Outer diameter (D) = 100 mm, Width (B) = 21 mm

• Load direction: Radial with moderate axial load capacity

• Construction: Double-row ball design with spherical outer race

• Material: High-grade chrome steel

• Features: Misalignment compensation, long service life, stable operation under load

• Applications: Industrial drives, conveyors, pumps, gear systems, bearing housing units

FAQ

1. What is a self-aligning ball bearing?
It’s a bearing with a spherical outer race that allows the inner ring to tilt slightly, compensating for misalignment between shaft and housing. Ideal for applications with shaft deflection or mounting inaccuracies.

2. What are the main advantages of the NSK 1211 K model?
It combines high precision, low friction, and long lifespan, providing stable operation even under fluctuating loads and minor misalignment.

3. Can the NSK 1211 K be used in a bearing housing unit?
Yes - this bearing fits perfectly in bearing housings or pillow block assemblies, offering flexibility and ease of installation in industrial systems.

4. What are the common applications for this bearing?
It’s used in machinery, conveyor systems, pumps, agricultural equipment, and heavy-duty mechanical assemblies.

5. Is the NSK 1211 K available for fast delivery?
Yes - this bearing is available directly from stock with 24-hour dispatch for orders within Poland and the EU.