71934 ACD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71934 ACD/HCP4ADT
Basic Information
System of measurement
Metric
Weight
4.69 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
56 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
45675 lbf
Radial static load rating
72000 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
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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71934 ACD/HCP4ADT Bearing Product Overview & Core Advantages
The 71934 ACD/HCP4ADT is a precision angular contact ball bearing designed for high-performance applications requiring exceptional accuracy and reliability. This duplex tandem (DT) matched set features two bearings preloaded against each other, delivering superior axial rigidity and the ability to handle significant combined loads. Manufactured to a P4A tolerance class, it ensures extremely tight dimensional and running accuracy. The use of ceramic balls and a phenolic cage contributes to its high-speed capability, low friction, and extended service life, making it an ideal solution for demanding, high-precision rotational systems.
71934 ACD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| HC | Hybrid Ceramic, indicating the balls are made of ceramic material for enhanced speed and durability. |
| P4A | Specifies the tolerance class, denoting very high precision for both dimensional and running accuracy. |
| DT | Duplex Tandem arrangement. Two bearings are mounted in a tandem configuration to increase axial load capacity in one direction. |
71934 ACD/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and 25° contact angle create a system with exceptional axial stiffness, capable of supporting high combined loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 16,250 rpm, minimizing heat generation and power loss.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, ensuring predictable performance and minimal runout in precision assemblies.
- Preload & Matched Set: Supplied as a preloaded matched set of 2 bearings, eliminating internal clearance and providing immediate, precise rotational performance without the need for user adjustment.
71934 ACD/HCP4ADT Bearing Typical Application Areas
This bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Robotics: Arm joints and rotary actuators where high positional accuracy and dynamic response are critical.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other instrumentation requiring reliable high-speed operation.
- High-Frequency Motors and Spindles: Applications where minimizing friction and heat at extreme rotational speeds is paramount.
