71918 CD/HCP4ATGA
Hybrid Ceramic Super Precision Bearings
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71918 CD/HCP4ATGA Bearing Product Overview & Core Advantages
The 71918 CD/HCP4ATGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a universal matchable (SU) bearing supplied in a set of three, it enables flexible mounting configurations to achieve optimal preload and stiffness. Its ceramic ball construction and P4A super-precision tolerance class deliver superior high-speed capability and minimal rotational runout. This bearing is designed to handle combined loads efficiently, with its 15° contact angle providing excellent thrust capacity. Pre-lubricated for immediate use, it offers a reliable, high-rigidity solution for the most critical spindle and rotary applications.
71918 CD/HCP4ATGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 71918 | Basic bearing series and size designation | Defines 90mm bore, 125mm OD, 54mm width dimensions |
| CD | 15° contact angle design | Optimized for combined radial and axial loading |
| HC | Hybrid ceramic construction | Ceramic balls reduce weight, improve speed and stiffness |
| P4A | Super precision tolerance class | Tighter running accuracy for high-precision applications |
| TGA | Phenolic cage material designation | Enables higher speeds and reduced friction |
71918 CD/HCP4ATGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of steel rings and ceramic balls significantly reduces rotating mass, enabling higher limiting speeds (15,000 rpm) while providing superior electrical insulation properties and extended service life.
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and minimal vibration for ultra-precise applications.
Universal Matching Capability: As part of a universal matchable (SU) set of three bearings, this configuration allows for flexible mounting arrangements to achieve the exact preload (Extra light / Class A) required for specific application needs.
Optimized Cage Design: The phenolic cage provides excellent strength-to-weight ratio, reduced centrifugal forces at high speeds, and compatibility with various lubrication types across the operating temperature range of -30°C to 110°C.
Enhanced Load Capacity: With a dynamic load rating of 22,725 lbf and static load rating of 34,425 lbf, this bearing delivers reliable performance under demanding combined load conditions.
71918 CD/HCP4ATGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity
- Precision Rotary Tables: Indexing and positioning systems demanding minimal runout
- High-Speed Motors: Spindle motors and high-frequency applications benefiting from ceramic hybrid technology
- Medical Equipment: CT scanners, dental handpieces, and laboratory instrumentation
- Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
