7211 ACD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7211 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
1.23 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
100 mm
Outside diameter tolerance
-0.004mm to 0
Width
42 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19170 lbf
Radial static load rating
18338 lbf
Limiting speed
34 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
Extra light / Class A
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
7211 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7211 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) arrangement provides superior stability and is optimized to handle combined loads (significant radial and axial loads in both directions) simultaneously. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-precision, high-reliability machinery. The pre-lubricated design and phenolic cage contribute to its readiness for high-speed operation.
7211 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7211 | Basic bearing series, indicating a 55 mm bore, 100 mm OD, and 42 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings supplied as a matched set). |
| DB | Back-to-Back mounting arrangement. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards, with enhanced width and runout tolerances. |
| A | Specifies an Extra Light preload applied to the matched set. |
7211 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists overturning moments, making it exceptionally stable under complex loading conditions.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to support high combined radial and axial loads from both directions, a critical feature for many precision applications.
- Optimized for High-Speed Operation: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry allow for a high limiting speed of 34,000 rpm.
- Precision Performance: Conformance to the P4A tolerance class guarantees extremely tight dimensional and running accuracy, resulting in smooth operation with minimal vibration and heat generation.
- Ready-to-Install: The bearing is pre-lubricated, simplifying installation and ensuring immediate operational readiness.
7211 ACD/P4ADBA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For CNC machining centers, grinders, and milling machines.
- High-Frequency Spindles: Used in PCB drilling and precision engraving.
- Precision Gearboxes: Especially in robotics and high-end automotive systems.
- Medical Equipment: Centrifuges and high-speed dental handpieces.
- Test and Measurement Apparatus: Where rotational accuracy is critical.
