7009 ACE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7009 ACE/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.45 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
32 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4478 lbf
Radial static load rating
3668 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7009 ACE/HCP4ADBA Bearing Product Overview & Core Advantages
The 7009 ACE/HCP4ADBA is a duplex back-to-back (DB) matched pair of Angular Contact Ball Bearings, engineered for applications demanding high precision and extreme rigidity. This pre-loaded set is designed to handle significant combined loads (radial and axial) simultaneously in both directions. Featuring a P4A super-precision tolerance and a 25° contact angle, it delivers exceptional running accuracy and stability, making it ideal for high-speed spindles and other critical machinery where uncompromising performance is required.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation (45mm bore, 75mm OD). |
| ACE | Indicates a 25° contact angle and specific internal design optimizations. |
| HC | Signifies the use of Hybrid Ceramic balls (Ceramic balls with steel rings). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
| DB | Specifies the Duplex Back-to-Back mounting arrangement of the matched pair. |
| A | Indicates an Extra Light Preload is applied to the bearing set. |
7009 ACE/HCP4ADBA Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a highly rigid bearing system that can withstand heavy combined radial and axial loads from both directions, minimizing shaft deflection under operation.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage, hybrid ceramic balls (which reduce centrifugal forces and friction), and an open design enables a very high limiting speed of 46,000 rpm. This makes it a premier choice for high-speed spindle bearings.
- Enhanced Precision and Longevity: The P4A tolerance class ensures minimal runout and vibration for superior machining quality. Ceramic balls offer increased stiffness, lower thermal expansion, and extended service life, especially in demanding environments.
- Optimized for System Integration: Supplied as a pre-loaded and matched set, this bearing pair simplifies installation, guarantees optimal preload, and ensures consistent, high-performance operation right from startup.
7009 ACE/HCP4ADBA Bearing Typical Application Areas
This precision bearing set is specifically designed for the most demanding applications, including:
- High-Frequency Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Robotics and Automation Arms
- High-Speed Motors and Spindle Drives
- Aerospace and Defense Instrumentation
- Medical Device Manufacturing Equipment
