71924 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71924 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
2.3 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.004mm to 0
Width
44 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
28125 lbf
Radial static load rating
41175 lbf
Limiting speed
10 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1120.18
/ each
In Stock
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71924 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71924 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a duplex back-to-back (DB) matched set, this bearing is pre-configured to provide superior stability under combined loads, handling significant radial loads and bidirectional axial loads simultaneously. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-precision, high-speed machinery. Its extra light preload (Class A) minimizes friction and heat generation, contributing to extended service life and reliable performance.
71924 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71924 CD/P4ADBA is decoded as follows:
- 71924: Basic bearing designation indicating a 120 mm bore, 165 mm OD, and 44 mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation and axial load capacity.
- D: Indicates the bearing is part of a duplex back-to-back (DB) matched set.
- P4A: Specifies the tolerance class, representing very high precision levels for both dimensional and running accuracy.
- DB: Confirms the duplex back-to-back arrangement of the two bearings in the set.
- A: Designates the extra light preload (Class A) applied to the matched set.
71924 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning and high rigidity.
- Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 28,125 lbf, this bearing excels at handling combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground components and optimized internal geometry allow for a high limiting speed of 10,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, outer diameter, and width tolerances, this bearing guarantees exceptional running accuracy and low noise/vibration levels.
- Durable Construction: Components made from high-grade chrome steel provide excellent wear resistance and long-term dimensional stability under a wide operating temperature range.
71924 CD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Robotic Drives.
- High-Frequency Motors and Spindles.
- Medical Equipment: Such as CT scanners and dental handpieces.
- Aerospace & Defense Systems: Including gyroscopes and radar equipment.
