71915 CD/P4AQBCB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71915 CD/P4AQBCB
Basic Information
System of measurement
Metric
Weight
1.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
64 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
33750 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Light / Class B
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
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71915 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 71915 CD/P4AQBCB is a precision angular contact ball bearing configured as a quadruplex back-to-back (QBC) matched set. This arrangement delivers exceptional system rigidity and is engineered to handle complex combined loads, including significant radial and bidirectional axial forces. Manufactured to P4A tolerance class, it guarantees superior running accuracy, making it ideal for high-precision, high-reliability applications requiring maximum stiffness and rotational precision.
71915 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71915 CD/P4AQBCB is decoded as follows:
- 71915: Denotes the bearing series and size (75mm bore, 105mm OD, 16mm width per single bearing).
- C: Signifies a 15° contact angle, optimized for high-speed operation and axial load capacity.
- D: Indicates the bearing is supplied with a light preload (Class B) for enhanced rigidity and reduced deflection.
- P4A: Specifies the ultra-precision tolerance class, ensuring minimal runout and vibration.
- QBC: Defines the Quadruplex Back-to-Back matched arrangement of four bearings.
- B: Confirms the standard universal matching is not applied; this is a pre-matched set.
71915 CD/P4AQBCB Bearing Structural Features & Performance Benefits
- Ultra-High Rigidity & Load Capacity: The quadruplex back-to-back (QBC) configuration creates a highly rigid bearing system capable of withstanding heavy combined radial and axial loads from both directions, minimizing shaft deflection under operational stresses.
- Precision & High-Speed Performance: Built to P4A tolerance standards and featuring a lightweight, robust phenolic cage, this bearing ensures smooth operation, low vibration, and excellent performance at high rotational speeds.
- Optimized for Demanding Applications: The 15° contact angle provides an ideal balance between radial load capacity and high-speed capability. The bearings are pre-lubricated and supplied as a factory-matched set, ensuring consistent performance and simplifying installation.
71915 CD/P4AQBCB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Spindles.
- Industrial Pumps and Compressors requiring high axial stiffness.
- Aerospace Actuation Systems and Robotic Rotary Joints.
