71934 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71934 ACDGC/P4A
Basic Information
System of measurement
Metric
Weight
2.85 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
28 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
27900 lbf
Radial static load rating
36000 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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71934 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71934 ACDGC/P4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. As a single bearing from a universally matchable (SU) set, it is designed to be paired with other bearings to form a preloaded arrangement, offering superior performance in handling combined loads. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other precision machinery. The phenolic resin cage and optimized 25° contact angle contribute to its high-speed capability and stability under complex loading conditions.
71934 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71934 | Basic bearing designation, indicating the bearing size with a 170mm bore and 230mm outside diameter. |
| AC | Angular Contact design, optimized for combined radial and axial loads. |
| D | High Contact Angle (25°), providing high axial load capacity and rigidity. |
| GC | Specific internal clearance and preload group (Moderate / Class C), optimized for universal matching. |
| P4A | Super Precision tolerance class, guaranteeing extremely tight dimensional and running accuracy for the highest performance applications. |
71934 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and robust construction enables the bearing to support significant combined loads (radial and axial) simultaneously, ensuring stable operation under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 16,250 rpm, making it an excellent high-speed bearing.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing offers minimal runout and vibration, which is critical for applications requiring extreme rotational accuracy and smooth operation.
- Universal Matching Capability (SU): This bearing is supplied as part of a set of three, designed to be universally matched. This allows for flexible mounting arrangements and the creation of preloaded bearing systems that deliver enhanced stiffness and accuracy.
- Optimized Material Selection: The use of chrome steel for rings and balls ensures high durability and fatigue resistance, contributing to a long service life.
71934 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring high precision and rigidity.
- Precision Spindles: Applications in PCB drilling, semiconductor manufacturing, and other high-accuracy machining processes.
- High-Frequency Motors: Motors and spindles that operate at very high rotational speeds.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other instrumentation demanding exceptional reliability and accuracy.
