7205 CDGA/HCP4AGMM0
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7205 CDGA/HCP4AGMM0 Bearing Product Overview & Core Advantages
The 7205 CDGA/HCP4A GMM0 is a single-row angular contact ball bearing engineered for ultra-high precision and high-speed performance. Positioned in the P4A super-precision tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its 15° contact angle is optimized for handling combined loads, efficiently supporting significant radial loads alongside axial loads in one direction. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it ideal for demanding applications requiring maximum reliability and minimal thermal expansion.
7205 CDGA/HCP4AGMM0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Advantage |
|---|---|---|
| 7205 | Standard bore (25 mm), outside diameter (52 mm), and width (15 mm) dimensions. | Standardized bearing size for easy integration and interchangeability. |
| CD | 15° nominal contact angle. | Optimized for combined radial and axial loads. |
| GA | Universal Matchable (SU) bearing in a set of 4 with Extra Light (A) preload. | Enables precise preload control and high system rigidity in matched arrangements. |
| HCP4A | P4A tolerance class (super precision) with phenolic cage. | Delivers ultra-high running accuracy and superior high-speed capability. |
| GMM0 | Grease lubricated with a specific temperature range (-30°C to 110°C). | Provides ready-to-install, long-term lubrication for a wide operating range. |
7205 CDGA/HCP4AGMM0 Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A super-precision standards with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal runout and superior system stability under load.
Enhanced Speed and Durability: The combination of ceramic (Si3N4) balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and friction. This allows for a very high limiting speed of 100,500 rpm, reduced heat generation, and increased operational life.
Superior Load Capacity: The 15° contact angle design enables the bearing to carry substantial combined loads (a combination of radial and axial forces), with a dynamic load rating of 3038 lbf and a static load rating of 1620 lbf.
Matched Set Performance: Designated as Universal Matchable (SU), these bearings can be supplied in precisely matched sets of four with an extra light preload (Class A). This simplifies the assembly of high-precision spindle systems, ensuring optimal preload and maximum rigidity.
7205 CDGA/HCP4AGMM0 Bearing Typical Application Areas
The 7205 CDGA/HCP4A GMM0 is the bearing of choice for ultra-demanding, high-speed precision machinery. Its primary applications include:
- High-Frequency Machine Tool Spindles: For CNC milling, grinding, and drilling centers where maximum speed and accuracy are critical.
- Precision Robotic Drives: In robot arm joints and gears requiring high rigidity and minimal friction.
- Advanced Dental and Medical Handpieces: Where extremely high RPM and sterilization compatibility are needed.
- Aerospace Gyroscopes and Instrumentation: For navigation and control systems demanding the highest levels of precision and reliability.
- High-Speed Compressors and Pumps: In applications where energy efficiency and long-term, maintenance-free operation are priorities.
