7007 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7007 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7007 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features an Extra light (Class A) preload and is manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its 15° contact angle is optimized for handling combined radial and axial loads simultaneously. A key advantage is its universal matchable (SU) design, allowing it to be paired with other bearings in sets of three to form a rigid, pre-loaded arrangement, ideal for high-speed and high-rigidity spindle applications.
7007 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7007: Basic designation indicating a metric series bearing with a 35mm bore and 62mm outside diameter.
- CD: Contact angle designation of 15°.
- GA: Indicates a preload grade of Extra light (Class A).
- HCP4A: A composite suffix.
- HC: Denotes a Hybrid Ceramic construction, featuring a steel ring and ceramic balls.
- P4A: Specifies the tolerance class, defining very high dimensional and running accuracy.
7007 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic (Si3N4) balls significantly reduces centrifugal forces, lowers operating temperature, and provides superior performance at high speeds (limiting speed of 56,000 rpm). This construction also offers extended service life and improved resistance to wear.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high rotational speeds, contributing to the bearing's excellent high-speed capability.
High Precision & Rigidity: Manufactured to P4A tolerance standards with a defined preload, this bearing delivers exceptional running accuracy, stiffness, and minimal run-out, which is critical for applications like machine tool spindles.
Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it can be mounted in tandem with other identical bearings to share loads and create a system with increased rigidity and load-carrying capacity.
7007 CDGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Robotics (Articulated arm joints and main axes)
- High-Frequency Motors and Spindles
- Medical Equipment (Dental handpieces, centrifuges)
- Aerospace Instrumentation and Gyroscopes
