71804 CD/P2DBB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71804 CD/P2DBB
Basic Information
System of measurement
Metric
Weight
0.036 kg
Tolerance class
P2
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
32 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
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1404 lbf
Radial static load rating
1192 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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71804 CD/P2DBB Bearing Product Overview & Core Advantages
The 71804 CD/P2DBB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement of two bearings is preloaded to deliver superior high rigidity and stability under combined loads, including radial and axial forces. Manufactured to P2 tolerance class, it ensures minimal runout and is ideal for high-speed spindles and other high-precision machinery requiring reliable, long-term performance.
71804 CD/P2DBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation, indicating a metric, angular contact ball bearing with a 20mm bore, 32mm OD, and 14mm width. |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings). |
| P2 | Specifies a high precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Denotes a Back-to-Back matched arrangement, providing high moment rigidity. |
71804 CD/P2DBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, making it ideal for applications requiring high positional accuracy.
- Optimized for Combined Loads: The 15° contact angle allows the bearing to efficiently handle both radial and axial loads simultaneously.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 100,500 rpm.
- Precision Performance: Manufactured to ABEC 7 / P2 tolerance standards, this bearing guarantees minimal vibration and noise for smooth, accurate rotation in demanding applications.
- Preloaded for Immediate Use: Supplied with a Light preload (Class B), the bearing pair is ready for installation, eliminating the need for on-site adjustment and ensuring immediate, consistent performance.
71804 CD/P2DBB Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Drives
- Medical and Dental Handpiece Motors
- Aerospace Instrumentation and Gyroscopes
- High-Performance CNC Machining Centers
