7021 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7021 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
3.18 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
105 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.004mm to 0
Width
52 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
35100 lbf
Radial static load rating
43425 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7021 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7021 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched set features a back-to-back (DB) arrangement with a Light preload (Class B), enabling it to handle significant combined loads—simultaneous radial and axial forces—with high stability. Manufactured to the stringent P4A tolerance class, it is an ideal solution for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical.
7021 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7021 CD/P4ADBB is decoded as follows:
- 7021: Basic bearing series, indicating a 105 mm bore, 160 mm OD, and 52 mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is part of a duplex pair (two bearings supplied as a set).
- P4A: Specifies the tolerance class, indicating very high precision for both dimensional and running accuracy.
- DB: Defines the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity and excellent stability under complex loading conditions.
7021 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise alignment and high operational stability.
- Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 35,100 lbf, this bearing set is engineered to handle demanding combined radial and axial loads encountered in high-performance applications.
- Precision & High-Speed Capability: The P4A tolerance class guarantees exceptional running accuracy, while the phenolic resin cage and optimized internal geometry contribute to smooth operation and a high limiting speed of 16,000 rpm.
- Optimized for Precision Systems: The light preload eliminates internal clearance, reducing vibration and noise for smoother, more accurate rotation right from startup.
7021 CD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is typically specified for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motor Spindles.
- Industrial Pumps and Compressors requiring high shaft rigidity.
- Robotic Arm Joints and Precision Rotary Tables.
