71916 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71916 ACD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.64 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
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12578 lbf
Radial static load rating
16538 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
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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71916 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71916 ACD/HCP4ADGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a universal matchable (SU) bearing supplied in a duplex set, it is engineered to handle combined loads with exceptional accuracy and rotational stability. Its construction with a ceramic ball and phenolic cage enables superior performance, including reduced friction, lower operating temperatures, and significantly higher limiting speeds compared to standard steel bearings, making it an ideal solution for high-performance spindles and precision machinery.
71916 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71916 ACD/HCP4ADGA provides detailed technical specifications through its suffixes:
- 71916: Basic bearing series and size designation (80mm bore, 110mm OD, 32mm width).
- ACD: Angular Contact design with a 25° contact angle.
- H: Denotes the duplex set configuration.
- C: Indicates the use of ceramic (Si3N4) balls.
- P4A: Specifies the super-precision tolerance class (equivalent to ABEC 7/ISO P4).
- D: Signifies universal matchable (SU) design, allowing for flexible mounting arrangements (DB, DF, DT).
- GA: Indicates a specific preload level (Extra light / Class A).
71916 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex set of two bearings provides a preloaded configuration, resulting in extremely high system rigidity. This enables the bearing to support significant combined radial and axial loads simultaneously, which is critical for maintaining precision under heavy cutting forces or other operational stresses.
- Superior High-Speed Performance: The combination of ceramic balls and a lightweight phenolic resin cage drastically reduces centrifugal forces and friction. This allows the bearing to achieve a very high limiting speed of 28,000 rpm with minimal heat generation.
- Extended Service Life & Reliability: Ceramic balls are harder, lighter, and more wear-resistant than steel, leading to a dramatic increase in bearing fatigue life. They are also electrically insulating and resistant to corrosion.
- Precision & Thermal Stability: Manufactured to P4A super-precision tolerance, this bearing ensures minimal runout and vibration. The phenolic cage offers excellent dimensional stability across the operating temperature range of -30°C to 110°C.
71916 ACD/HCP4ADGA Bearing Typical Application Areas
This bearing is specifically engineered for high-end applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy servo motors.
- Aerospace & Defense: Gyroscopes, radar systems, and jet engine components.
- Medical Equipment: High-speed dental handpieces and surgical drill spindles.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
