71807 CD/HCP4DBAGMM
Hybrid Ceramic Super Precision Bearings
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71807 CD/HCP4DBAGMM Bearing Product Overview & Core Advantages
The 71807 CD/HCP4DBAGMM is a precision duplex pair of angular contact ball bearings, specifically configured in a Back-to-Back (DB) arrangement. This high-performance bearing set is engineered to handle combined loads (radial and axial) simultaneously while providing exceptional rotational accuracy and high rigidity. Manufactured to P4 tolerance class and featuring ceramic balls and a phenolic cage, it is designed for demanding applications requiring high-speed operation, superior stiffness, and long-term reliability in precision machinery.
71807 CD/HCP4DBAGMM Bearing Model Code Explained, Specifications & Naming Convention
- 71807: Basic bearing series and size code (35mm bore, 47mm OD, 14mm width).
- CD: Indicates a duplex pair with a specific preload. In this context, it signifies the Back-to-Back (DB) arrangement.
- HC: Stands for Hybrid Ceramic, denoting the use of ceramic balls.
- P4: The tolerance class, indicating very high precision with tight dimensional and running accuracy tolerances.
- DB: Confirms the Duplex Back-to-Back mounting arrangement.
- A: Specifies the preload level, in this case, Extra Light (Class A).
- GMM: Denotes the grease type and fill quantity used for lubrication.
71807 CD/HCP4DBAGMM Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that effectively resists moment loads and provides excellent operational stability, which is critical for high-precision spindles.
Superior Speed & Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage enables significantly higher limiting speeds (56,000 rpm) compared to all-steel equivalents, with lower operating temperatures.
Precision & Accuracy: Manufactured to ABEC 7 / P4 tolerance standards, this bearing ensures minimal runout and vibration, which is essential for achieving the highest levels of machining and positioning accuracy.
Long Service Life: The hybrid ceramic design offers increased durability, better electrical resistance, and the ability to run with minimal lubrication, extending the bearing's operational lifespan in challenging conditions.
71807 CD/HCP4DBAGMM Bearing Typical Application Areas
This high-precision, high-speed bearing set is ideally suited for applications where maximum rigidity and rotational accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed centrifuges and dental drills.
