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7209 ACD/P4A Super Precision Single Row Angular Contact Ball Bearing 45×85×19
Product Overview
7209 ACD/P4A 45×85×19 mm Super Precision High Capacity Single Row Angular Contact Ball Bearing
Super-precision, high-capacity, single row angular contact ball bearing. The 7209 ACD/P4A bearing, with a bore diameter of 45 mm, outside diameter of 85 mm, and width of 19 mm, features precise dimensions, high static load capacity, and is manufactured to the P4A precision grade. This bearing delivers superior performance and reliability, making it ideal for applications that require high rotational accuracy and stability.
Technical Specifications
Part Number
7209 ACD/P4A
Bearing Type
Angular Contact
Measurement Unit
Metric
Dimensions
Inner Bore Diameter (d): 45 mm
Inner Bore Diameter Tolerance: -0.006mm to 0
Outer Bore Diameter (D): 85 mm
Outer Bore Diameter Tolerance: -0.008 mm to 0
Width (B): 19 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: 0.43 kg
Matched Arrangement: No
Universal Matching Bearing: No
Preload: Not applicable
Load and Speed
Dynamic Radial Load: 41,000 N
Static Radial Load: 30,000 N
Reference Speed For Grease: 15,000 rpm
Limiting Speed For Oil: 24,000 rpm
Performance Features
The 7209 ACD/P4A angular contact ball bearing is manufactured to P4A precision grade standards and 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.
Applications
The 7209 ACD/P4A bearing, a precision angular contact ball bearing, is widely used in various fields due to its high precision (P4A grade), high-speed capability, and optimized 25° contact angle design.
Precision Machine Tools and Spindle Systems
Primarily used in super-precision machine tool spindles, such as machining centers and CNC machines, capable of withstanding high-speed rotation (up to 24,000 RPM) while maintaining stability
In electric spindles, preload adjustment balances centrifugal force effects, reducing slippage and heat generation while enhancing rigidity and service life
Industrial Machinery and Equipment
Welding Equipment: Used in AC welders and manual welding machines to handle combined axial and radial loads
Drying and Mixing Equipment: Includes flash dryers, rotary dryers, and laboratory mixing equipment, suitable for continuous operation in high-temperature environments
Plastics and Rubber Industry: Applied in injection molding machines and extruders, meeting the requirements for high-precision transmission
Specialized Equipment and Precision Instruments
Medical Devices: Such as surgical equipment, requiring low noise and high cleanliness during operation
Cleaning and Sorting Machinery: Used in high-pressure cleaning equipment, withstanding frequent start-stop impacts
Other High-End Applications
Textile Machinery: High-precision rotating components in equipment such as pressing tables
Testing and Laboratory Equipment: Such as centrifuges and precision measuring instruments, relying on its low-vibration characteristics
Certifications & Services
CERTIFICATE
RoHS & REACH, IATF16949:2016
Feature
High Speed and Stiffness, High Running Accuracy, High Load Carrying Capacity
Beining Intelligent Technology (Zhejiang) Co., Ltd. (formerly Ningbo Beining Bearing Co., Ltd.), established in February 2013, is a modern high-tech enterprise specializing in the research, development, design, and precision manufacturing of high-performance bearings.
Operating from a 30,000 m²...
Beining Intelligent Technology (Zhejiang) Co., Ltd. (formerly Ningbo Beining Bearing Co., Ltd.), established in February 2013, is a modern high-tech enterprise specializing in the research, development, design, and precision manufacturing of high-performance bearings.
Operating from a 30,000 m²...
