71805 CD/HCP4DBAGMM
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71805 CD/HCP4DBAGMM
Basic Information
System of measurement
Metric
Weight
0.038 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1521 lbf
Radial static load rating
1440 lbf
Limiting speed
103 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71805 CD/HCP4DBAGMM Bearing Product Overview & Core Advantages
The 71805 CD/HCP4DBAGMM is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability under combined loads, effectively managing radial forces and bidirectional axial thrust. Manufactured to P4 tolerance class and featuring a phenolic cage with ceramic balls, it is engineered for high-speed operation and extended service life in demanding environments.
71805 CD/HCP4DBAGMM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71805 | Basic bearing designation (25mm bore, 37mm OD). |
| CD | Duplex arrangement: Back-to-Back (DB). |
| HC | Hybrid Ceramic: Ceramic balls with steel rings. |
| P4 | High-Precision Tolerance Class (ABEC 7 / ISO P4). |
| DB | Reiterates the Duplex Back-to-Back mounting. |
| A | Preload: Extra Light (Class A). |
| GMM | Grease lubrication, standard factory fill. |
71805 CD/HCP4DBAGMM Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that significantly increases moment stiffness, making it ideal for applications where shaft deflection must be minimized.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic (Si3N4) balls reduces centrifugal forces, lowers operating temperature, and enables a high limiting speed of 103,000 rpm.
- Enhanced Load Capacity: The 15° contact angle is optimized to handle significant combined radial and axial loads simultaneously, providing reliable performance in complex loading conditions.
- Extended Service Life & Reliability: Hybrid ceramic construction offers superior resistance to wear and electrical erosion. The P4 precision grade ensures smooth, quiet, and vibration-free operation, critical for high-precision machinery.
71805 CD/HCP4DBAGMM Bearing Typical Application Areas
This bearing is specified for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tooling and high-speed machining centers
- High-Speed Motors and servo drives
- Aerospace & Defense instrumentation and control systems
- Medical & Dental handpieces and laboratory equipment
