S71906 CD/P4AQBCC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71906 CD/P4AQBCC
Basic Information
System of measurement
Metric
Weight
0.2 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4185 lbf
Radial static load rating
4118 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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S71906 CD/P4AQBCC Bearing Product Overview & Core Advantages
The S71906 CD/P4AQBCC is a metric precision angular contact ball bearing designed for the most demanding applications. Its defining feature is its Quadruplex Back-to-Back (QBC) matched arrangement, providing exceptional rigidity and stability under complex combined loads. As a P4A tolerance class bearing, it guarantees ultra-high running accuracy, making it ideal for high-speed spindles and other precision machinery requiring superior performance and reliability.
S71906 CD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
The model number S71906 CD/P4AQBCC provides a complete technical description:
- S7: Denotes a high-precision bearing series.
- 1906: Specifies the size series (19) and bore diameter (06 x 5 = 30 mm).
- C: Indicates a 15° contact angle, optimized for high-speed operation.
- D: Signifies a moderate preload (Class C) for enhanced stiffness.
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy.
- QBCC: Defines the matched set arrangement:
- Q: Quadruplex (set of 4 bearings).
- BC: Back-to-Back mounting.
- C: Universal matching is not provided; these are a standard matched set.
S71906 CD/P4AQBCC Bearing Structural Features & Performance Benefits
- Unmatched Rigidity and Stability: The Quadruplex Back-to-Back (QBC) arrangement of four bearings creates an extremely rigid bearing system, effectively resisting moment loads and maintaining shaft position under heavy combined radial and axial loads.
- High-Speed Capability: The 15° contact angle and lightweight phenolic resin cage are engineered for high-speed operation, enabling a limiting speed of 100,500 rpm. This cage material offers excellent strength-to-weight ratio and operates smoothly at high velocities.
- Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications demanding the highest levels of accuracy.
- Sealed and Pre-Lubricated: As a sealed bearing pre-filled with grease lubrication, it is protected from contamination and is ready for immediate use, offering long-term, maintenance-free operation within its specified temperature range.
- Superior Load Capacity: With a dynamic load rating of 4185 lbf and a static load rating of 4118 lbf, it is built to handle significant loads while maintaining precision.
S71906 CD/P4AQBCC Bearing Typical Application Areas
This high-precision, high-rigidity bearing is specifically designed for advanced applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM machinery.
- Medical Equipment: High-speed centrifuges and dental handpieces.
- Any application requiring a pre-matched, ultra-rigid bearing set for exceptional rotational accuracy and stability.
