S71915 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71915 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.29 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4770 lbf
Radial static load rating
3600 lbf
Limiting speed
28 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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S71915 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71915 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and is manufactured to a super-precision P4A tolerance class, ensuring minimal runout and superior rotational accuracy. Its core advantages include the ability to accommodate combined loads (radial and axial) efficiently, high-speed capability up to 28,000 rpm facilitated by its phenolic cage and ceramic balls, and long service life due to its sealed, pre-lubricated design. This bearing is universally matchable (SU), allowing for flexible mounting in sets to achieve desired preload and rigidity.
S71915 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71915 ACEGA/HCP4A is decoded as follows:
- S: Denotes a bearing with a super-precision tolerance class.
- 7: Identifies the bearing series, indicating a specific internal geometry optimized for high-speed operation.
- 1915: Specifies the bore size (15mm x 5 = 75 mm).
- AC: Stands for Angular Contact with a 25° contact angle.
- E: Indicates an optimized internal design, often for higher speeds and loads.
- GA: Signifies a specific preload level (Extra light / Class A).
- HCP4A: A composite suffix where HC may refer to the Phenolic Cage, and P4A confirms the super-precision tolerance class exceeding ABEC 7.
S71915 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and 25° contact angle enable the bearing to support significant combined radial and axial loads simultaneously. The extra light preload (Class A) enhances system stiffness and minimizes deflection under load.
- Exceptional High-Speed Performance: The combination of a lightweight phenolic resin cage and ceramic balls (Silicon Nitride) reduces centrifugal forces and friction, allowing for a high limiting speed of 28,000 rpm. Ceramic balls also offer superior resistance to wear and thermal expansion.
- Super-Precision Operation: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing guarantees smooth, quiet, and vibration-free operation essential for precision machinery.
- Maintenance-Free and Reliable: The sealed construction and pre-applied grease lubrication protect against contamination and retain lubricant, providing a long, maintenance-free service life within the specified temperature range of -30°C to 110°C.
S71915 ACEGA/HCP4A Bearing Typical Application Areas
The S71915 ACEGA/HCP4A is ideally suited for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Medical Equipment: Dental handpieces, centrifuges, and imaging scanners.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and flight control mechanisms.
- High-Frequency Spindles: PCB drilling and routing machines.
