7005 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7005 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7005 CDGA/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with a Universal Matchable (SU) designation, it is designed to be used in sets of three to form a preloaded arrangement, offering superior system rigidity. Its core advantages include the ability to handle combined loads (radial and axial) efficiently, facilitated by a 15° contact angle. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-reliability, high-performance machinery.
7005 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| 7005 | Basic bearing series, indicating a 25mm bore and 47mm outside diameter. |
| CDGA | Specifies a 15° contact angle and Extra Light (A) preload. This combination is optimized for high-speed operation and minimal friction. |
| HCP4A | Indicates the bearing is supplied lubricated and meets the P4A tolerance class, signifying very high running accuracy for precision applications. |
7005 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage enables a very high limiting speed of 56,000 rpm, minimizing heat generation and power loss.
- Precision & Rigidity: Manufactured to P4A tolerance class, this bearing ensures exceptional running accuracy. When used in a universally matched set of three, it provides a preloaded system with high rigidity and precise shaft positioning.
- Superior Load Capacity: The angular contact design with a 15° contact angle is optimized to support significant combined radial and axial loads, as evidenced by its dynamic (2151 lbf) and static (1170 lbf) load ratings.
- Optimized for Matched Sets: The Universal Matchable (SU) feature allows for flexible mounting arrangements (e.g., back-to-back, face-to-face) in sets, simplifying installation and ensuring consistent, high performance in complex spindle designs.
7005 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: High-speed measuring devices and laboratory equipment.
- Advanced Robotic Systems: Joints and actuators requiring high accuracy and speed.
- High-Frequency Motors: Spindles for PCB drilling and other micro-machining applications.
