Overview
The SKF 6221-2Z bearing is a single-row deep groove ball bearing with metal shields on both sides, designed for dependable performance in a wide range of industrial applications. This shielded deep groove radial ball bearing features standard radial internal clearance and measures 105x190x36mm. The “2Z” designation indicates metal seals/shields mounted on both outer raceways, providing protection against dust and contaminants while maintaining smooth operation in harsh environments.
Key Features
- Metal Shields (2Z): Both sides sealed with metal shields to keep contaminants out and lubrication in
- Standard Radial Clearance (Cn): Normal internal play for general-purpose applications
- Cylindrical Bore: Direct mounting on standard shafts without modification
- Standard Bearing Steel Construction: Proven material composition for durability and reliability
- Sheet Steel Cage: Robust bearing retainer for consistent ball spacing
- Dual Load Capacity: Handles both radial and axial loads simultaneously
Technical Specifications
The SKF 6221-2Z offers precise dimensions and proven performance metrics:
- Bore Diameter (d): 105 mm (4.1339 inches)
- Outside Diameter (D): 190 mm (7.4803 inches)
- Width (B): 36 mm (1.4173 inches)
- Weight: 3.795 kg (3.7948 kg per distributor specs)
- Operating Temperature Range: −20 to +120 °C
- Tolerance Class: P0/PN2 (ABEC 1)
- Seal Type: ZZ (Steel seals, both sides)
- Bore Type: Cylindrical bore
- Material: Standard bearing steel
- EAN: 7316576623493
Typical Applications
The SKF 6221-2Z is suitable for diverse industrial environments requiring robust bearing performance. Common applications include:
- Electric Motors: Industrial and fractional-horsepower motors
- Conveyors: Belt and roller systems in processing and handling
- Pumps & Compressors: Heavy-duty centrifugal and reciprocating equipment
- Automotive Subsystems: Transmissions, clutch systems, and auxiliary drives
- Gearboxes: Shaft support in speed-reducing and speed-increasing units
- Machine Tool Spindles: Precision positioning and rotating components
Compatibility & Replacements
Compatible With
- Any standard industrial equipment requiring a 105mm bore bearing
- Motors, gearboxes, and power transmission systems
- Sealed bearing applications in moderately contaminated environments
- Standard shaft mountings without special adapters
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The SKF 6221-2Z directly replaces other standard deep groove ball bearings with identical dimensions (105x190x36mm), such as equivalent models from competing bearing manufacturers.
Works With
- Standard lubrication systems (grease- or oil-compatible design)
- General mechanical power transmission applications
- Equipment using ISO standard bearing specifications
- Installation in pillow blocks and bearing housings rated for this size class
