S71913 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71913 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.18 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
3600 lbf
Limiting speed
31 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71913 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The S71913 ACDGB/HCP4A is a precision angular contact ball bearing designed for high-performance applications requiring exceptional accuracy and reliability. As a single bearing with a Universal Matchable (SU) designation, it can be universally paired with other bearings from the same manufacturing lot to form a matched set of three, ensuring optimal preload and performance consistency. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, thanks to its 25° contact angle. The use of ceramic balls and a phenolic cage contributes to high-speed capability, low heat generation, and extended service life, making it ideal for demanding, high-precision environments.
S71913 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71913 ACDGB/HCP4A provides detailed technical specifications through its suffixes:
- S7: Indicates a series of high-precision, super-precision bearings.
- 1913: Denotes the size series; 19 for the non-standard series and 13 for the bore diameter code (65 mm).
- AC: Angular Contact design.
- D: Specific internal design and contact angle (25°).
- GB: Indicates a Light preload (Class B).
- /HC: Signifies the use of Hybrid Ceramic balls.
- P4A: Denotes an ultra-precise tolerance class with even tighter running accuracy than ABEC 7 (P4).
S71913 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
The structural design of the S71913 ACDGB/HCP4A delivers distinct performance benefits:
- High Rigidity and Load Capacity: The angular contact design and robust construction provide high rigidity, enabling it to withstand significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a very high limiting speed of 31,000 rpm, minimizing friction and heat buildup.
- Precision and Longevity: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration. The sealed design with pre-lubrication protects against contamination and provides consistent performance across a wide temperature range (-30°C to 110°C).
- Universal Matching: As a Universal Matchable (SU) bearing, it simplifies the assembly of precision spindle units by allowing any bearing from the same lot to be paired without performance degradation.
S71913 ACDGB/HCP4A Bearing Typical Application Areas
The S71913 ACDGB/HCP4A is engineered for the most demanding high-precision and high-speed machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed dental handpieces and surgical drill spindles.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
