S71910 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71910 CDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.12 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3038 lbf
Radial static load rating
2340 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
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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S71910 CDGB/HCP4A Bearing Product Overview & Core Advantages
The S71910 CDGB/HCP4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and high-speed capability. This single bearing features a universal matchable (SU) design, allowing it to be paired with another identical bearing in a back-to-back (DB) or face-to-face (DF) arrangement to handle combined loads effectively. Its construction with ceramic balls and a phenolic cage enables superior performance in high-velocity scenarios, offering low friction, reduced heat generation, and extended service life. The bearing is preloaded to Light / Class B and manufactured to P4A tolerance class, ensuring high rigidity and running accuracy for precision machinery.
S71910 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71910 CDGB/HCP4A breaks down into the following technical specifications:
- S7: Designates a series of high-precision, super-precision bearings.
- 1910: Indicates the size series, with a 50mm bore, 72mm OD, and 12mm width.
- C: Signifies a 15° contact angle, optimized for high-speed applications and axial load capacity.
- D: Represents a light preload (Class B), providing high rigidity and minimal axial play.
- G: Indicates the bearing is universal matchable (SU) for precise paired mounting.
- B: Specifies a phenolic resin cage, ideal for high-speed operation due to its lightweight and strength.
- HC: Denotes the use of hybrid ceramic balls (silicon nitride), reducing centrifugal forces and enabling higher limiting speeds.
- P4A: The tolerance class, indicating extremely tight dimensional and running accuracy exceeding ABEC 7 standards.
S71910 CDGB/HCP4A Bearing Structural Features & Performance Benefits
The S71910 CDGB/HCP4A's advanced design delivers significant performance benefits:
- High-Speed Performance: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, allowing for a high limiting speed of 34,000 rpm.
- High Rigidity and Accuracy: The 15° contact angle and light preload provide excellent axial and radial stiffness, minimizing deflection under load and ensuring precise shaft positioning, critical for P4A tolerance class applications.
- Superior Load Capacity: As an angular contact ball bearing, it is engineered to support substantial combined radial and axial loads simultaneously, with a dynamic load rating of 3038 lbf.
- Extended Service Life and Reliability: Hybrid ceramic construction offers superior resistance to wear and thermal degradation. The pre-greased lubrication within the specified temperature range (-30°C to 110°C) ensures consistent performance.
S71910 CDGB/HCP4A Bearing Typical Application Areas
This high-precision bearing is ideally suited for applications where speed, accuracy, 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.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and avionics.
