71968 CDMA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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71968 CDMA/HCP4A Bearing Product Overview & Core Advantages
The 71968 CDMA/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications demanding exceptional rotational accuracy and rigidity. Positioned in the P4 (ABEC-7) tolerance class, this bearing is designed to handle significant combined loads, primarily thrust loads in one direction, with a 15° contact angle that optimizes performance. Its core advantages include the use of ceramic balls for reduced weight, lower friction, and enhanced speed capability, coupled with a phenolic cage for quiet operation at high speeds. The bearing is pre-lubricated and preloaded, ensuring immediate operational readiness and consistent, reliable performance in demanding environments.
71968 CDMA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71968 | Basic bearing designation indicating the size series and bore diameter (340 mm). |
| C | Specifies a 15° contact angle, optimized for high-speed applications with combined loads. |
| D | Indicates a high rigidity internal design. |
| MA | Signifies a matched arrangement for precise axial positioning and preload. |
| HC | Denotes the use of Hybrid Ceramic balls (steel rings with ceramic balls). |
| P4A | Specifies the P4 (ABEC-7) tolerance class, ensuring extremely tight dimensional and running accuracy. |
71968 CDMA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and allows for a higher limiting speed (4,500 rpm). This also provides inherent electrical insulation and superior corrosion resistance.
- Phenolic Resin Cage: The lightweight phenolic cage offers excellent dimensional stability and low friction, contributing to smooth, quiet operation and high-speed capability even under poor lubrication conditions.
- Preload & High Rigidity: The bearing is supplied with a preload, which eliminates internal clearance. This results in high rigidity, precise shaft positioning, and reduced noise and vibration during operation.
- High Load Capacity: With a dynamic load rating of 87,750 lbf and a static load rating of 150,750 lbf, this bearing is built to withstand substantial combined radial and axial loads.
- Pre-lubrication: The bearing comes pre-lubricated, simplifying installation and providing immediate protection against wear during the initial run-in period.
71968 CDMA/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, accuracy, and rigidity. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-performance automotive and aerospace transmissions.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Turbochargers and specialized pumps and compressors.
