71907 ACEGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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71907 ACEGA/HCP4AL Bearing Product Overview & Core Advantages
The 71907 ACEGA/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features an Extra Light (Class A) preload and is manufactured to P4A super-precision tolerance, ensuring minimal runout and superior rotational accuracy. Its 25° contact angle is optimized to handle significant combined loads, including high radial and one-directional axial loads simultaneously. The use of ceramic balls and a phenolic cage contributes to its capabilities as a high-speed bearing, enabling a limiting speed of 56,000 rpm while maintaining dimensional stability across a wide temperature range.
71907 ACEGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
- 71907: Basic model number denoting a metric, angular contact bearing with a 35mm bore, 55mm OD, and 10mm width.
- AC: Signifies Angular Contact design with a 25° contact angle.
- EGA: Indicates the bearing is Universal Matchable (SU) and part of a matched set of 2 bearings for precise axial rigidity.
- HCP4A: Denotes the P4A tolerance class, representing super-precision grades for high-accuracy applications.
- L: Specifies that the bearing is pre-Lubricated.
71907 ACEGA/HCP4AL Bearing Structural Features & Performance Benefits
Precision Engineering & Rigidity: Manufactured to P4A super-precision standards with tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing delivers exceptional running accuracy and high rigidity. The Extra Light preload (Class A) minimizes deflection under load, ensuring stable performance in precision spindles.
High-Speed Capability: The combination of ceramic balls (Si3N4) and a lightweight phenolic resin cage significantly reduces centrifugal forces, enabling superior high-speed performance up to 56,000 rpm. Ceramic balls also provide lower thermal expansion and reduced friction.
Enhanced Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing effectively handles combined radial and axial loads. The dynamic load rating of 1638 lbf and static load rating of 990 lbf ensure reliable operation under demanding conditions.
Thermal Stability & Universal Matching: The phenolic cage maintains integrity across the operating temperature range (-30°C to 110°C). As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in various configurations (back-to-back, face-to-face, or tandem) to create a matched set that meets specific application stiffness requirements.
71907 ACEGA/HCP4AL Bearing Typical Application Areas
The 71907 ACEGA/HCP4AL is engineered for high-precision, high-speed rotational systems where accuracy and reliability are critical. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Instrumentation: Measuring equipment, optical scanners, and coordinate measuring machines
- High-Speed Motors: Spindle motors for IT equipment, dental handpieces, and small precision motors
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: High-speed dental drills and laboratory instrumentation
