71916 ACE/HCP4ALDGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71916 ACE/HCP4ALDGA
Basic Information
System of measurement
Metric
Weight
0.62 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
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7898 lbf
Radial static load rating
7538 lbf
Limiting speed
17 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 ACE/HCP4ALDGA Bearing Product Overview & Core Advantages
The 71916 ACE/HCP4ALDGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle for optimal axial load capacity. Its extra light preload (Class A) ensures smooth, precise operation with minimal friction, making it ideal for high-speed and high-rigidity spindle systems. The use of ceramic balls and a phenolic cage contributes to reduced weight, lower centrifugal forces, and enhanced performance at extreme rotational speeds.
71916 ACE/HCP4ALDGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| ACE | Specific internal design and clearance/preload class | Defines the operational characteristics, including the extra light preload for high-speed, low-friction applications. |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Enables higher limiting speeds, reduced weight, and longer service life, especially in lubricant-starved conditions. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for applications requiring superior rotational precision. |
| LDGA | Universal Matchable (SU) arrangement designation | Indicates the bearing is manufactured to be universally matchable in sets, allowing for flexible mounting configurations (DB, DF, DT) to achieve the required rigidity and load capacity. |
71916 ACE/HCP4ALDGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic (Si3N4) balls significantly reduces centrifugal forces and rolling friction. This results in lower operating temperatures, increased limiting speed (17,000 rpm), and extended lubricant life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and high acceleration capability.
- Precision Engineering (P4A): Manufactured to ABEC 7 / P4 precision class, this bearing ensures minimal runout and vibration, which is critical for maintaining machining accuracy and surface finish quality.
- Universal Matchability (SU): As a universal matchable bearing, it can be paired with another identical bearing in various configurations (back-to-back, face-to-face, or tandem) without selective mounting, simplifying installation and ensuring predictable, high-performance preload characteristics.
- High Load Capacity: With a dynamic load rating of 7898 lbf and a static load rating of 7538 lbf, it provides reliable performance under significant combined radial and axial loads.
71916 ACE/HCP4ALDGA Bearing Typical Application Areas
This high-precision angular contact ball bearing is engineered for the most demanding high-speed and high-accuracy machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors operating at very high RPM.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and surgical tools.
