71913 ACDGB/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71913 ACDGB/HCP4AL
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Open
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
36 X 1000 rpm
Lubrication
Lubricated
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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Product Overview and Core Advantages
The 71913 ACDGB/HCP4AL 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 P4A tolerance class, ensuring ultra-precise rotational characteristics. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed capability enabled by its ceramic balls and phenolic cage, and a light preload (Class B) for optimal rigidity and minimal rotational vibration in precision assemblies.
71913 ACDGB/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
The model number 71913 ACDGB/HCP4AL provides detailed technical specifications. Below is a breakdown of its key suffixes:
- 71913: Denotes the bearing series and size (Bore: 65mm, OD: 90mm, Width: 13mm).
- AC: Angular Contact design with a 25° contact angle.
- D: Specific internal design and optimized internal clearance for Universal Matchable (SU) sets.
- GB: Indicates a Light Preload (Class B).
- HC: Signifies the use of Hybrid Ceramic balls (Ceramic balls with steel rings).
- P4A: Identifies the tolerance class, signifying very high dimensional and running accuracy.
- L: Indicates the bearing is Lubricated from the factory.
Structural Features and Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds (36,000 rpm) and extended service life, especially in high-speed applications.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's superior high-speed performance and smooth operation.
- Precision and Rigidity: Manufactured to P4A tolerance class and supplied with a light preload, this bearing delivers high running accuracy, enhanced system rigidity, and minimal deflection under load.
- Universal Matching (SU): This bearing is designed to be universally matchable with other bearings of the same designation, allowing for flexible arrangement in sets (e.g., back-to-back or face-to-face) to handle complex load conditions without the need for selective assembly.
71913 ACDGB/HCP4AL Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for advanced machinery and equipment, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace Systems: Gyroscopes, actuators, and auxiliary power units.
- High-Frequency Motors and Spindles: Where extreme rotational accuracy and speed are critical.
