7009 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7009 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.2 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
75 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6210 lbf
Radial static load rating
4860 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 134.04
/ each
In Stock
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Product Overview and Core Advantages
The 7009 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features an extra light preload (Class A) and is manufactured to P4A tolerance class, ensuring minimal runout and superior rotational precision. Its 25° contact angle is optimized to handle significant combined loads—both radial and axial—simultaneously. A key advantage is its universal matchable (SU) design, allowing it to be paired with other bearings in a set (typically 3) to achieve specific stiffness and preload requirements, making it ideal for high-rigidity, high-speed spindles.
7009 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7009 ACDGA/HCP4A provides detailed technical specifications through its suffixes:
- 7009: Basic designation indicating a 45mm bore, 75mm OD bearing.
- AC: Angular Contact design, enabling it to support combined loads.
- D: Signifies a high ball count and optimized internal geometry for increased load capacity.
- GA: Indicates a specific internal clearance and preload grade; here, Extra Light Preload (Class A).
- /HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy exceeding ABEC 7 standards.
Structural Features and Performance Benefits
- Hybrid Ceramic Construction: The ceramic balls and chrome steel rings reduce weight, lower centrifugal forces, and provide non-conductive properties. This significantly enhances the limiting speed (41,000 rpm) and reduces friction and heat generation.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance and stability at very high speeds, contributing to smooth operation and long service life.
- High Rigidity and Load Capacity: The 25° contact angle and optimized internal design provide high rigidity, with a dynamic load rating of 6210 lbf and static load rating of 4860 lbf, making it capable of handling demanding combined loads.
- Precision and Thermal Stability: Manufactured to P4A tolerance with tight bore, OD, and width tolerances, this bearing ensures precise shaft positioning. The phenolic cage and ceramic balls offer stable performance across the operating temperature range (-30°C to 110°C).
7009 ACDGA/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where speed, precision, and rigidity are critical.
- High-Speed Machine Tool Spindles: CNC milling, grinding, and jig boring machines.
- Precision Grinding Spindles: Internal and external grinding applications.
- High-Frequency Motors and Spindles
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
- Medical Equipment: High-speed dental handpieces and surgical drill spindles.
