7009 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7009 CDGA/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
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6435 lbf
Radial static load rating
5040 lbf
Limiting speed
46 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
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In Stock
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7009 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7009 CDGA/HCP4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional performance. It is characterized by its P4A tolerance class, ceramic ball construction, and extra light preload (Class A). This bearing is designed to handle high-speed operation while providing superior rigidity and accuracy, making it ideal for high-precision spindles and other critical machinery where minimal runout and thermal stability are paramount.
7009 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7009: Basic bearing series, indicating a 45 mm bore diameter and 75 mm outside diameter.
- C: Denotes a 15° contact angle, optimized for high-speed applications and combined loads.
- DGA: Indicates the bearing is part of a Universal Matchable (SU) set. "D" and "GA" are specific manufacturer codes for the preload and internal clearance grouping to ensure precise performance when mounted in pairs or triples.
- HCP4A: A composite suffix. HC signifies the use of Hybrid Ceramic balls (Silicon Nitride). P4A specifies an ultra-precision tolerance class exceeding ABEC 7, with enhanced running accuracy and controlled preload.
7009 CDGA/HCP4A Bearing Structural Features & Performance Benefits
The performance of the 7009 CDGA/HCP4A is driven by its advanced material selection and precision engineering:
- Hybrid Ceramic Construction: The use of ceramic (Silicon Nitride) balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and enables a higher limiting speed (46,000 rpm). This also provides superior resistance to wear and a longer service life.
- Ultra-Precision P4A Tolerance: Manufactured to the strictest dimensional and running accuracy standards, this bearing ensures minimal vibration and exceptional positional accuracy for the most demanding applications.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent guidance at high speeds, with low friction and good performance under lubrication starvation.
- Extra Light Preload (Class A): This preload class provides high rigidity and precise rotational accuracy while minimizing heat generation, which is critical for high-speed spindle applications.
7009 CDGA/HCP4A Bearing Typical Application Areas
The 7009 CDGA/HCP4A is specifically designed for high-end, precision-driven industries, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
