7011 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7011 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.38 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
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8348 lbf
Radial static load rating
6975 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7011 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7011 ACDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high rigidity. As a universally matchable single bearing, it is engineered to be paired with a second bearing of the same type to form a preloaded duplex set, enabling it to accommodate combined radial and axial loads simultaneously. Manufactured to the stringent P4A tolerance class, it offers superior running accuracy, making it an ideal choice for high-speed spindles and other high-precision machinery.
7011 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7011 ACDGB/P4A provides detailed technical specifications:
- 7011: Basic bearing series, indicating a 55mm bore, 90mm OD, and 18mm width.
- A: Signifies a 25° contact angle, optimized for supporting higher axial loads.
- CDGB: Indicates a Universal Matchable (SU) bearing designed for a Light preload (Class B) when mounted in a back-to-back (DB) arrangement.
- P4A: Denotes an ultra-precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration for superior performance in demanding applications.
7011 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to handle significant combined loads. When used in a preloaded duplex set, the arrangement provides high system rigidity, minimizing deflection under load.
- Super-Precision Performance: Manufactured to P4A tolerance standards, this bearing guarantees extremely tight dimensional and running accuracy, which is critical for applications requiring high positional precision and smooth operation.
- Optimized High-Speed Capability: The lightweight and durable phenolic resin cage ensures excellent dimensional stability and low friction, contributing to a high limiting speed of 34,000 rpm. The open design allows for efficient lubrication management.
- Universal Matching: As a Universal Matchable (SU) bearing, any two 7011 ACDGB/P4A bearings can be paired to achieve a defined light preload without selective matching, simplifying inventory and assembly processes.
7011 ACDGB/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and auxiliary power units.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are paramount.
