6021 NR
6000 Series Snap Ring Bearings
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Part No.
Part No.
6021 NR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.65 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
105 mm
Bore diameter tolerance
-0.02mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.025mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
169.7 mm
Width of snap ring
2.82 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
17108 lbf
Radial static load rating
14725 lbf
Limiting speed
5.3 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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6021 NR Bearing Product Overview & Core Advantages
The 6021 NR is a single row deep groove ball bearing designed for superior performance in demanding industrial applications. This metric bearing excels at handling primarily radial loads and offers high operational reliability. A key distinguishing feature is its snap ring on the outer ring, which simplifies axial location within a housing, making installation more efficient and secure. Manufactured with chrome steel rings and balls, and a stainless steel cage, it provides excellent durability and consistent operation within a wide temperature range.
Model Code Breakdown
The model number 6021 NR can be decoded as follows:
- 60: Indicates a deep groove ball bearing series with a medium cross-section.
- 21: Specifies the bore diameter. The calculation is 21 x 5 = 105 mm.
- NR: Signifies that the bearing is equipped with a snap ring (a locating snap ring groove) on its outer ring. This feature aids in axial positioning and reduces housing design complexity.
- Open seal type, suitable for environments where separate lubrication systems are used.
- P0 tolerance class (Normal), which is a standard grade for general applications.
- CN radial internal clearance (Normal group).
6021 NR Bearing Structural Features & Performance Benefits
- Snap Ring for Easy Installation and Location: The integrated snap ring on the outer diameter allows for secure axial location, eliminating the need for complex housing shoulders and simplifying assembly and disassembly processes.
- High Load Capacity: With a dynamic load rating of 17,108 lbf and a static load rating of 14,725 lbf, this bearing is engineered to handle significant radial loads, ensuring long service life in strenuous conditions.
- Robust Construction: The combination of chrome steel for rings and balls provides high hardness and wear resistance, while the stainless steel cage offers superior corrosion resistance and cage integrity, contributing to stable operation at the limiting speed of 5,300 rpm.
- Precision and Reliability: Manufactured to P0 tolerance with CN radial clearance, it delivers consistent performance for a wide range of general industrial applications.
6021 NR Bearing Typical Application Areas
The 6021 NR bearing is ideally suited for applications requiring reliable radial load support and simplified axial positioning. Common uses include:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Any machinery where the snap ring feature can reduce housing costs and complexity.
