71916 ACD/HCP4ALDGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71916 ACD/HCP4ALDGA
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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In Stock
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71916 ACD/HCP4ALDGA Bearing Product Overview & Core Advantages
The 71916 ACD/HCP4A is a super-precision angular contact ball bearing engineered for the most demanding applications. As a universal matchable (SU) bearing supplied in a pre-set duplex pair, it is designed to accommodate combined loads (high radial and axial loads) simultaneously. Its defining characteristics include an extra light preload (Class A), a P4A tolerance class for exceptional running accuracy, and the use of ceramic balls, which collectively deliver superior high-speed performance, high rigidity, and extended service life in precision machinery.
71916 ACD/HCP4ALDGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71916 | Basic bearing series and size designation (80mm bore, 110mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | The bearing is part of a duplex pair (two bearings). |
| HC | Indicates the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | The tolerance class, denoting super-precision geometrical and running accuracy, tighter than ABEC 7. |
| LDGA | Suffix for Light Preload (Class A) and Universal Matchable (SU) arrangement. |
71916 ACD/HCP4ALDGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation. This is critical for achieving a limiting speed of 28,000 rpm and enhanced durability.
- High Rigidity & Load Capacity: The duplex pair configuration, pre-loaded at the factory, creates a highly rigid bearing system capable of withstanding significant combined radial and axial loads (Dynamic: 12,578 lbf, Static: 16,538 lbf).
- Precision & Stability: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing ensures minimal vibration, exceptional running accuracy, and stable performance under high-speed operation.
- Optimized for Matched Sets: The Universal Matchable (SU) designation means any two bearings from this series can be paired in a back-to-back (DB) or face-to-face (DF) arrangement without selective matching, simplifying installation and inventory.
71916 ACD/HCP4ALDGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is ideally suited for high-performance machinery requiring extreme accuracy, speed, and rigidity. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric vehicles and industrial automation.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units (APUs).
