7210 ACD/P4A 50*90*20 mm Super Precision High Capacity Single Row
Angular Contact Ball Bearing
Super-precision, high-capacity, single row angular contact ball
bearing
The 7210 ACD/P4A bearing,with a bore diameter of 50 mm,outside diameter of 90 mm,and
width of 20 mm,features precise dimensions, high static load
capacity, and is manufactured to the P4A precision grade. Equipped
with hybrid ceramic balls, this bearing delivers superior
performance and reliability, making it ideal for applications that
require high rotational accuracy and stability.
Part Number | 7210 ACD/P4A |
Bearing Type | Angular Contact |
Measurement Unit | Metric |
Dimensions | Inner Bore Diameter (d) | 50 mm |
Inner Bore Diameter Tolerance | -0.006mm to 0 |
Outer Bore Diameter (D) | 90 mm |
Outer Bore Diameter Tolerance | -0.008 mm to 0 |
Width (B) | 20 mm |
Width Tolerance | -0.2mm to 0 |
Specifications | Contact Angle | 25° (15°,40° Available) |
Material | Chrome Steel |
Cage Material | Phenolic |
Number of Rows | 1 Single Row |
Seal Type | Open |
Temperature Range | -30°C to 150°C |
Lubrication | Oil or Grease |
Tolerance Class | P4A better than P4 (ABEC-7) |
Weight | 0.45 kg |
Matched Arrangement | No |
Universal Matching Bearing | No |
Preload | Not applicable |
Load and Speed | Dynamic Radial Load | 42300 N |
Static Radial Load | 32500 N |
Reference Speed For Grease (r/min) | 14,000 rpm |
Limiting Speed For Oil(r/min) | 22,000 rpm |


What's the Performance Features of 7210 ACD/P4A Bearing?
The 7210 ACD/P4A angular contact ball bearing is manufactured to P4A precision grade standards, excels in
high-precision and high-performance applications. It handles both
radial and axial loads simultaneously, supports high-speed
operation with stability, minimizes torque and friction for energy
efficiency, and offers enhanced rigidity for accuracy under heavy
loads. Built with hybrid ceramic balls, this durable bearing
ensures extended service life and effective performance across a
wide temperature range, making it ideal for applications requiring
superior rotational accuracy and reliability.
What's the Applications of the 7210 ACD/P4A Bearing?
The 7210 ACD/P4A bearing is a high-precision angular contact ball bearing designed
for applications requiring exceptional accuracy, rigidity, and
reliability. Below are the detailed application fields and specific
equipment where these bearings are utilized:
1. High-Precision CNC Machine Tools
- 5-Axis Machining Center Spindles: Supports complex multi-axis machining with high precision, ideal
for aerospace and medical device manufacturing.
- Ultra-Precision Grinding Machine Wheel Spindles: Ensures micron-level accuracy in surface finishing processes,
such as those used for optical lenses and precision components.
- Heavy-Duty Lathe Turret Rotary Drives: Provides smooth and precise rotation for tool changes and
heavy-duty turning operations.
2. Industrial Robots & Automation Systems
- Heavy-Duty Robot Waist Rotation Mechanisms: Facilitates robust and reliable movements in large industrial
robots used in automotive and heavy manufacturing.
- Collaborative Robot Harmonic Drives: Ensures smooth and flexible motion in cobots, enhancing
human-robot collaboration.
- Automated Production Line Indexing Rotary Tables: Enables precise indexing and positioning in high-speed production
lines.
3. Aerospace Power & Control Systems
- Aircraft Engine Fuel Pump Drive Shafts: Withstands extreme loads and speeds, ensuring reliable operation
in jet engines.
- Flap Actuator Gearboxes: Provides precise control of aircraft flaps, contributing to safe
takeoff and landing.
- Satellite Solar Array Deployment Drives: Supports reliable deployment and positioning of solar panels in
space.
4. Semiconductor & Electronics Manufacturing
- Wafer Dicing Machine Spindle Drives: Ensures high-speed, precise cutting of semiconductor wafers,
improving yield rates.
- Vacuum Coating Machine Rotating Target Holders: Provides stable rotation under vacuum conditions, ensuring
uniform coating thickness.
- High-Precision Chip Mounter Rotary Heads: Enables accurate placement of chips during assembly, enhancing
production efficiency.
5. New Energy Equipment
- Wind Turbine Pitch System Slewing Rings: Handles dynamic loads in wind turbines, optimizing energy capture
and system durability.
- EV Reducer High-Speed Output Shafts: Supports efficient power transmission in electric vehicle
gearboxes, improving performance.
- Hydrogen Fuel Cell Compressor Rotor Bearings: Enhances compressor efficiency by reducing friction and wear in
fuel cell systems.
6. Medical Imaging & Surgical Devices
- CT Scanner Gantry Slip Ring Units: Ensures smooth and continuous rotation for high-quality imaging
in diagnostic equipment.
- Proton Therapy Multileaf Collimator Drives: Provides precise beam shaping for targeted cancer treatment,
minimizing damage to healthy tissues.
- Orthopedic Surgical Robot Rotary Joints: Facilitates precise movements in robotic-assisted surgeries,
improving surgical outcomes.
7. Optics & Precision Instruments
- Laser Interferometer Rotary Reference Tables: Ensures ultra-precise rotational motion for high-resolution
measurement and testing.
- Astronomical Telescope Equatorial Mount Drives: Provides smooth and accurate tracking of celestial objects for
astronomical observations.
- Electron Microscope Stage Rotation Units: Enables precise sample rotation for detailed imaging in electron
microscopy.
8. Heavy Machinery & Engineering Equipment
- Tunnel Boring Machine Cutterhead Drives: Supports the heavy loads and precise rotation required for tunnel
excavation.
- Mining Crusher Rotor Supports: Provides reliable operation in harsh mining environments,
handling high shock loads.
- Port Crane Slewing Mechanisms: Facilitates smooth and controlled rotation of crane booms,
enhancing operational efficiency.
CERTIFICATE | RoHS & REACH, IATF16949:2016 |
Feature | High Speed and Stiffness,High Running Accuracy,High Load Carrying
Capacity |
Service | OEM&ODM Customized Services |
Samples | Please Contact Us |
Service | Online Support,Professional Service |
Size | Standard,For custom sizes ,please contact us |
Factory Manufacturer | Yes |