71807 ACDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71807 ACDGA/HCP4
Basic Information
System of measurement
Metric
Weight
0.026 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
981 lbf
Radial static load rating
911 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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71807 ACDGA/HCP4 Bearing Product Overview & Core Advantages
The 71807 ACDGA/HCP4 is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and speed. Engineered to a P4 tolerance class, it offers superior running accuracy. Its core advantage lies in its ability to accommodate combined loads—simultaneously handling radial and axial loads—making it ideal for high-rigidity, high-speed applications. The use of a ceramic ball and phenolic cage combination contributes to reduced weight, lower friction, and enhanced performance at high rotational speeds.
71807 ACDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| 71807 | Basic bearing series and size code (35mm bore, 47mm OD, 7mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex arrangement design, indicating it is a universal matchable bearing. |
| GA | Preload specification: Extra light (Class A) preload for minimal friction and heat generation. |
| /HC | Hybrid Ceramic: Features ceramic balls for superior high-speed performance and durability. |
| P4 | Tolerance class P4, denoting very high precision for demanding applications. |
71807 ACDGA/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and duplex configuration provide high rigidity, enabling the bearing to effectively support combined radial and axial loads.
- Exceptional High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, allowing for a high limiting speed of 56,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance standards with tight dimensional control on bore, outside diameter, and width, ensuring smooth and precise operation.
- Optimized for Matched Sets: This bearing is Universal Matchable (SU) and is supplied in sets of three, allowing for precise preload control in duplex or triplex arrangements for maximum system stiffness.
71807 ACDGA/HCP4 Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications including:
- Machine Tool Spindles
- High-Speed Motors and Spindles
- Precision Grinding Equipment
- Aerospace Actuators and Control Systems
- Medical and Dental Handpieces
