S71909 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71909 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1440 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
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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S71909 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71909 ACEGA/HCP4A is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing from a universally matchable (SU) pair, it excels in handling combined radial and axial loads simultaneously. Its construction with a P4A super-precision tolerance class, ceramic balls, and phenolic cage ensures superior high-speed capability, rigidity, and extended service life in critical machinery.
S71909 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| ACEGA | 25° Contact Angle, Extra Light (A) Preload, Phenolic Cage | Optimized for high-speed operation and low friction. The preload ensures consistent stiffness and minimal runout. |
| HCP4A | Super Precision P4A Tolerance Class, Hybrid Ceramic Balls | Delivers extreme rotational accuracy, reduced heat generation, and superior performance at very high speeds. |
S71909 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and extra light preload provide excellent resistance to combined loads, ensuring stable and precise shaft positioning under demanding conditions.
- Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 41,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerance class, this bearing guarantees minimal running noise and vibration. The sealed design with grease lubrication protects against contamination and provides reliable, long-term operation within a temperature range of -30°C to 110°C.
S71909 ACEGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where precision and speed are critical, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Robotics
- Medical and Dental Equipment
- Aerospace Instrumentation
