71934 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71934 CD/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
15 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
29925 lbf
Radial static load rating
37350 lbf
Limiting speed
10 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:
$ 3065.28
/ each
In Stock
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71934 CD/HCP4A Bearing Product Overview & Core Advantages
The 71934 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This single-row bearing features a 15° contact angle and is supplied with a preload, ensuring minimal axial and radial play for superior system stability. Its construction with ceramic balls and a phenolic cage enables outstanding high-speed performance, while the open design allows for optimized lubrication management. This bearing is designed to handle combined loads, with a high capacity for thrust loads in one direction, making it an ideal component for high-rigidity and high-reliability spindle systems.
71934 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71934 CD/HCP4A deciphers its technical specifications as follows:
- 71934: The basic bearing series, indicating a high-precision angular contact bearing with a 170 mm bore and 230 mm outside diameter.
- C: Denotes a 15° contact angle.
- D: Indicates the bearing is supplied with a preload for enhanced rigidity and precise running accuracy.
- HC: Signifies the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4: Specifies the tolerance class P4 (ABEC-7), denoting very high dimensional and running accuracy.
- A: Indicates a 30° contact angle (This appears to be a discrepancy with the provided 15° specification. Please verify the exact product configuration).
71934 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially at very high speeds. Ceramic balls also offer superior resistance to wear and corrosion.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and low friction at high rotational speeds, contributing directly to the bearing's high limiting speed of 10,000 rpm.
- Preloaded Design: The application of a preload eliminates internal clearance, resulting in increased bearing stiffness, improved guidance accuracy, and reduced noise and vibration levels.
- High-Precision Grinding: Manufactured to P4 (ABEC-7) tolerance class, this bearing guarantees precise shaft runout and minimal vibration, which is critical for applications like machine tool spindles.
- Optimized Load Capacity: With a dynamic load rating of 29,925 lbf and a static load rating of 37,350 lbf, it is built to handle significant radial and one-direction axial (thrust) loads.
71934 CD/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and other high-speed automated equipment.
- High-Frequency Motors: Spindles for electric motors operating at extreme RPMs.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instruments.
