71907 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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71907 CDGB/HCP4A Bearing Product Overview & Core Advantages
The 71907 CDGB/HCP4A is a single row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capability. Designed to accommodate primarily radial loads and axial loads in one direction simultaneously, this bearing features a P4A tolerance class for superior running accuracy, a phenolic resin cage optimized for high-speed operation, and ceramic balls that reduce centrifugal forces and enable higher limiting speeds. Its light preload (Class B) ensures minimal deflection under operational stresses, making it ideal for machine tool spindles and other demanding precision machinery.
71907 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 71907: Basic bearing series and size designation (35mm bore, 55mm OD, 10mm width).
- CD: Universal Matchable bearing designation. This bearing is designed to be universally matched with other bearings of the same code in sets.
- GB: Indicates a Light Preload (Class B) applied to the bearing.
- HCP4A: HC signifies a phenolic resin (polyamide) cage. P4A is the tolerance class, denoting very high precision with stricter dimensional and running accuracy tolerances than ABEC 7.
71907 CDGB/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Performance & Rigidity: The combination of a lightweight phenolic cage (HC) and low-density ceramic balls significantly reduces centrifugal forces and inertial mass, enabling a high limiting speed of 56,000 rpm. The 15° contact angle and light preload provide high system rigidity with minimal heat generation.
Precision & Load Capacity: Manufactured to a P4A tolerance class, this bearing ensures exceptional running accuracy and dimensional stability. It offers a dynamic load rating of 2194 lbf and a static load rating of 1474 lbf, providing reliable performance under combined radial and axial loads.
Universal Matching & Thermal Stability: Designated as Universal Matchable (SU), these bearings can be universally paired in any combination within a set of three to achieve the required preload and rigidity without selective mounting. The phenolic cage and ceramic balls also contribute to stable performance across the operating temperature range of -30°C to 110°C.
71907 CDGB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where extreme rotational speeds and precision are critical.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
