71934 ACD/P4AQBCB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71934 ACD/P4AQBCB
Basic Information
System of measurement
Metric
Weight
11.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
170 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
230 mm
Outside diameter tolerance
-0.004mm to 0
Width
112 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
73125 lbf
Radial static load rating
144000 lbf
Limiting speed
16.25 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
Price:
$ 3409.55
/ each
In Stock
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71934 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 71934 ACD/P4AQBCB is a precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a matched back-to-back arrangement (QBC) of four bearings, enabling it to withstand complex combined loads, including significant radial and bidirectional axial loads. Its light preload (Class B) ensures smooth, precise operation with minimal runout, making it ideal for high-speed, high-rigidity spindles and other precision machinery where positional accuracy is critical.
71934 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, 25° Contact Angle | Optimized for handling combined radial and axial loads efficiently. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for superior performance. |
| QBC | Quadruplex Back-to-Back Matched Set | Provides maximum system rigidity and moment load capacity. |
71934 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The quadruplex back-to-back arrangement creates an extremely stiff bearing system capable of withstanding heavy combined loads and high moment loads, ensuring stable operation under demanding conditions.
- High-Speed Capability: The phenolic cage offers low weight and excellent performance at high speeds, contributing to the bearing's limiting speed of 16,250 rpm. The 25° contact angle provides a balanced design for both speed and axial load capacity.
- Precision Performance: Manufactured to P4A tolerance class with a light preload, this bearing delivers minimal vibration and high running accuracy, which is essential for applications requiring precise positioning and finish.
- Durable Construction: Components made from chrome steel (rings and balls) ensure high durability, long service life, and consistent performance under the specified temperature range of -30°C to 110°C.
71934 ACD/P4AQBCB Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-torque, high-accuracy industrial drives.
- Industrial Pumps and Compressors: For handling significant axial and radial forces.
- Robotic and Automation Systems: Critical joints and axes requiring high stiffness and accuracy.
