211-2ZNR SKF 55x100x21 Deep Groove Ball Bearing

Industrial Applications

The SKF 211-2ZNR 55x100x21 is a high-performance deep groove ball bearing engineered for heavy-duty industrial applications requiring reliability, precision and high load capacity. Designed with a snap-ring groove and snap ring (NR) in the outer ring, the bearing allows secure axial location within bearing housings and bearing units. Its metal shields on both sides (2Z) provide protection against contamination and extend service life in demanding environments.

This bearing is widely used in electric motors, conveyor systems, industrial drive shafts, gearboxes, automation machines and mechanical equipment operating under continuous load. Thanks to standardized dimensions (55 mm x 100 mm x 21 mm), it fits common maintenance requirements and allows fast replacement without redesigning assemblies.

Key Advantages & Technical Specifications

• Dimensions: 55 mm (bore) x 100 mm (outer diameter) x 21 mm (width)

• Type: deep groove ball bearing, single row

• Shielding: 2Z - metal shields on both sides

• Snap ring version: NR - groove and snap ring for secure mounting

• Material: high-grade bearing steel, steel cage

• Load handling: designed for high radial loads and moderate axial loads

• Suitable for: bearing housings, bearing units, assemblies requiring precise axial positioning

• Benefits: wysoka trwałość, low vibration, reduced maintenance, long operating life in industrial environments

The filling-slot construction characteristic for this bearing size allows more rolling elements inside the raceway, increasing radial load capacity compared to standard deep groove bearings, making it ideal for applications prioritizing strength and durability over maximum rotation speed.

Why Choose SKF 211-2ZNR for B2B Procurement?

For OEM manufacturers, service departments and industrial distributors, SKF 211-2ZNR represents a strategic inventory component. Its combination of standardized size, reinforced construction and mounting security supports efficient servicing, reduces downtime and improves system reliability in demanding production environments. The bearing is well-suited for wholesale supply programs and maintenance stock planning thanks to broad compatibility with industrial machinery.

FAQ

Q1: What does the designation 2ZNR mean?
A1: 2Z refers to metal shields on both sides, and NR refers to a snap-ring groove and snap ring enabling axial positioning in a housing.

Q2: Can this bearing support axial loads?
A2: Yes, although primarily designed for radial loads, its geometry supports moderate axial loads in both directions.

Q3: Where is this bearing typically used?
A3: In industrial motors, gearboxes, conveyor lines, automation systems and other mechanical assemblies requiring durability and continuous operation.

Q4: What advantages does the snap-ring feature offer?
A4: It ensures strong and accurate positioning in a housing or bearing unit, preventing movement during operation and improving overall stability.

Q5: Why choose SKF over generic alternatives?
A5: SKF offers confirmed quality, precision tolerances and extended operating life, critical for reducing maintenance costs and unplanned downtime.