7210 ACD/P4AQBCC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7210 ACD/P4AQBCC
Basic Information
System of measurement
Metric
Weight
1.85 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
80 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
25200 lbf
Radial static load rating
29025 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7210 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 7210 ACD/P4AQBCC is a precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric system bearing features a back-to-back quadruplex (QBC) matched arrangement, enabling it to withstand significant combined loads—both radial and axial—simultaneously. Its P4A tolerance class ensures ultra-high running accuracy, making it ideal for high-speed, high-precision machinery where stability and reliability are paramount. The moderate preload (Class C) eliminates internal clearance, providing immediate responsiveness and enhanced system stiffness.
7210 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
The model number 7210 ACD/P4AQBCC is decoded as follows:
- 7210: Basic series designation (70mm Bore, 90mm OD, 80mm Width)
- AC: Angular Contact design with a 25° contact angle
- D: Indicates a moderate preload (Class C)
- P4A: Denotes a super-precision tolerance class for exceptional running accuracy
- QBCC: Specifies the bearing is part of a Quadruplex Back-to-Back (QBC) matched set with Class C preload
7210 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The quadruplex back-to-back (QBC) arrangement of four bearings creates an extremely rigid support system, capable of handling high radial dynamic load ratings of 25,200 lbf and radial static load ratings of 29,025 lbf. This configuration is optimized for managing complex combined loads.
- High-Speed Performance: The lightweight, durable phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 46,000 rpm. The 25° contact angle provides an optimal balance between axial and radial load capacity for high-speed operation.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior performance in precision applications.
- Robust Material Construction: Both the rings and balls are made from high-grade Chrome Steel, offering excellent wear resistance and fatigue life. The bearing comes pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7210 ACD/P4AQBCC Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery requiring maximum rigidity and precision, including:
- Machine Tool Spindles (e.g., high-speed machining centers, grinding spindles)
- Precision Gearboxes and Robotic Drives
- Aerospace Actuation Systems
- High-Speed Pumps and Compressors
- Medical Imaging Equipment (e.g., CT scanner gantries)
