71918 FE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71918 FE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71918 FE/HCP4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universal matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to optimize performance for specific load conditions. Its core advantages include the ability to handle combined loads (radial and axial) efficiently, superior running accuracy due to its P4A tolerance class, and high-speed capability enabled by its phenolic cage and ceramic balls. This bearing is pre-lubricated and features an open design, making it ideal for high-reliability, precision systems.
71918 FE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series and size designation (90mm bore, 125mm OD, 36mm width). |
| FE | Designates a universal matchable (SU) bearing, allowing for flexible mounting arrangements. |
| HC | Indicates the use of hybrid ceramic balls (silicon nitride), which reduce weight and inertia for higher speeds. |
| P4A | Specifies a high precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DGA | Denotes an extra light preload (Class A), which minimizes friction and heat generation at high speeds. |
71918 FE/HCP4ADGA 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 extends service life, making it an ideal high-speed bearing.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing to the bearing's high limiting speed of 15,000 rpm.
- 18° Contact Angle & Universal Matchability: The optimized contact angle provides excellent performance for combined loads. The universal matchable (SU) design allows for the creation of pre-loaded bearing sets without selective assembly, simplifying installation and enhancing system rigidity.
- P4A Precision & Extra Light Preload: The P4A tolerance class ensures minimal runout and vibration for ultra-smooth operation. The extra light preload (DGA) minimizes starting and running torque, which is critical for high-speed spindles and precision instruments.
71918 FE/HCP4ADGA Bearing Typical Application Areas
The 71918 FE/HCP4ADGA is engineered for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging device rotors.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
