S71905 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71905 CE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.076 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1960 lbf
Radial static load rating
1260 lbf
Limiting speed
83 X 1000 rpm
Lubrication
Grease
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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In Stock
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S71905 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The S71905 CE/HCP4ADGA is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a universally matchable (SU) bearing supplied in a pre-set pair, it is engineered to handle combined loads—significant radial and axial loads in both directions—simultaneously. Its construction with a ceramic ball and phenolic cage enables superior high-speed capabilities and thermal stability. Operating within a P4A tolerance class and featuring a 15° contact angle with extra light preload, this bearing delivers high running accuracy, high rigidity, and reliable operation in precision machinery.
S71905 CE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number S71905 CE/HCP4ADGA provides detailed technical specifications through its suffixes:
- S: Denotes a super-precision bearing series.
- 7: Indicates an angular contact design.
- 1905: Specifies the bearing size series (19) and bore diameter (05 x 5 = 25 mm).
- CE: Signifies a universally matchable (SU) bearing designed to be paired in any combination (face-to-face, back-to-back, or tandem) without pre-load loss.
- HC: Indicates a hybrid ceramic construction, featuring ceramic balls for reduced weight, lower friction, and higher speed potential.
- P4A: Represents an ultra-precise tolerance class stricter than ABEC 7, ensuring minimal runout and vibration.
- DGA: Specifies the use of a phenolic resin cage and grease lubrication, optimized for high-speed operation.
S71905 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The dual bearing matched set and angular contact design provide a rigid support system, capable of handling high combined radial and axial loads from both directions.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 83,000 rpm, making it an ideal high-speed bearing.
- Precision & Stability: Manufactured to a P4A tolerance class with a 15° contact angle and extra light preload, this bearing ensures minimal runout, high positional accuracy, and smooth operation under high rotational speeds.
- Sealed & Lubricated for Life: The sealed design with factory-applied grease protects against contamination and provides long-term, maintenance-free operation within the specified temperature range of -30°C to 110°C.
S71905 CE/HCP4ADGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is critical in high-performance applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- High-Frequency Spindles: In PCB drilling and precision engraving machines.
- Medical Equipment: Such as high-speed dental handpieces and centrifuge rotors.
- Aerospace & Defense Systems: Including gyroscopes, radar systems, and auxiliary power units (APUs).
- Robotics: In precision robotic arm joints and servo motors.
