71916 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71916 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.74 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13320 lbf
Radial static load rating
17550 lbf
Limiting speed
28 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:
$ 354.9
/ each
In Stock
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71916 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71916 CD/P4ADBA is a high-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 and is preloaded to Extra Light / Class A specifications, ensuring minimal axial and radial runout. Its primary advantage lies in its ability to handle combined loads—significant radial loads alongside substantial axial loads in both directions—making it an ideal choice for high-speed, high-rigidity spindles and precision machinery where operational reliability is paramount.
71916 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71916 CD/P4ADBA is decoded as follows:
- 71916: The basic bearing designation, indicating a metric, angular contact ball bearing with an 80 mm bore, 110 mm OD, and 32 mm width.
- C: Signifies a 15° contact angle, optimized for high-speed operation and high axial load capacity.
- D: Indicates the bearing is part of a Duplex (matched pair) arrangement.
- DB: Specifies the Back-to-Back mounting configuration of the duplex pair, which provides high moment rigidity.
- P4A: Denotes a super-precision tolerance class (exceeding ABEC 7), ensuring extremely tight dimensional and running accuracy for critical applications.
71916 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision under heavy cutting forces or high speeds.
- Superior Load Capacity: Engineered with a 15° contact angle and manufactured from high-grade chrome steel, this bearing is capable of supporting high dynamic and static load ratings (13,320 lbf and 17,550 lbf respectively).
- Optimized High-Speed Performance: The lightweight, durable phenolic resin cage minimizes centrifugal forces and ensures stable operation at the high limiting speed of 28,000 rpm. The open design and pre-lubrication facilitate efficient heat dissipation.
- Precision Engineering: Manufactured to P4A tolerance class with extremely tight bore, OD, and width tolerances, this bearing guarantees exceptional running accuracy, low vibration, and consistent performance in the most demanding precision applications.
71916 CD/P4ADBA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Pumps and Compressors requiring high shaft stability.
- Advanced Robotics and Automation rotary joints and arms.
