71934 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71934 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
2.34 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
170 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
230 mm
Outside diameter tolerance
-0.011mm 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° to 110 °C
Radial dynamic load rating
27900 lbf
Radial static load rating
36000 lbf
Limiting speed
9 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 3064.68
/ each
In Stock
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71934 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71934 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 25° contact angle and is supplied with a preload, delivering superior rotational accuracy and high rigidity. Its construction with ceramic balls and a phenolic cage enables outstanding high-speed performance and reduced rotational inertia. Designed to accommodate combined loads (radial and axial), it is an ideal solution for high-reliability, precision machinery.
71934 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71934 ACD/HCP4A provides detailed technical specifications through its suffixes:
- 71934: Basic model number indicating a metric, light series angular contact ball bearing.
- A: Denotes a 25° contact angle, optimized for high axial load capacity.
- CD: Signifies a matched arrangement (in this case, a single bearing supplied with a specific preload).
- HC: Indicates the use of Hybrid Ceramic balls (steel rings with ceramic balls).
- P4: Specifies the tolerance class P4 (ABEC-7), indicating very high precision.
- A: Confirms the 25° contact angle (reiterated from the first suffix).
71934 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The preloaded single-row design and P4 precision class ensure minimal deflection and exceptional running accuracy, which is critical for high-speed spindles.
- Superior High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage significantly increases the limiting speed and reduces friction and heat generation.
- Excellent Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously.
- Optimized for Performance: The open seal type allows for customized lubrication schemes to maximize performance in specific applications, while the standard lubrication provides initial operation readiness.
71934 ACD/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors: Spindles for PCB drilling and dental handpieces.
