71907 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71907 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 71907 CDGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision applications. 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 axial loads in one direction alongside radial loads. The use of ceramic balls and a phenolic cage contributes to superior high-speed performance, reduced friction, and extended service life, making it ideal for demanding, high-reliability machinery.
71907 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 35mm bore. |
| C | Specifies a 15° contact angle. |
| DG | Indicates the bearing is Universal Matchable (SU), designed to be mounted in sets (in this case, a set of 3) to achieve specific preload and rigidity. |
| A | Denotes an Extra Light preload (Class A). |
| HCP4A | Defines the tolerance class. HC refers to a specific high-precision grouping, and P4A is the super-precision tolerance level for both inner and outer rings. |
71907 CDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & High-Rigidity Design: The combination of ceramic balls (silicon nitride) and a lightweight phenolic resin cage significantly reduces centrifugal forces and inertial mass. This allows for a very high limiting speed of 56,000 rpm while maintaining operational stability and high rigidity.
Superior Precision & Load Capacity: Manufactured to P4A tolerance standards, this bearing ensures minimal runout and vibration. Its angular contact design with a 15° contact angle provides excellent combined load capacity, with a dynamic load rating of 2194 lbf and a static load rating of 1474 lbf.
Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it is supplied with selective tolerances that allow multiple bearings to be mounted together in a preloaded arrangement. This is critical for applications requiring extreme shaft rigidity and precise axial positioning.
Wide Operating Range: The open design with factory-applied lubrication is suitable for a temperature range from -30°C to 110°C, accommodating various operational environments.
71907 CDGA/HCP4A Bearing Typical Application Areas
The 71907 CDGA/HCP4A is the bearing of choice for high-performance machinery where precision, speed, and reliability are non-negotiable. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Articulated arms and high-accuracy servo motors.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
