7011 ACE/HCP4AL1DGA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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7011 ACE/HCP4AL1DGA Bearing Product Overview & Core Advantages
The 7011 ACE/HCP4AL1DGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (radial and axial loads simultaneously), it features a 25° contact angle for optimal axial load capacity. Its P4A super-precision tolerance class and ceramic ball construction make it an ideal choice for high-speed and high-rigidity spindle systems. The bearing is universally matchable (SU), allowing for simplified mounting in preloaded pairs to achieve maximum system stiffness and rotational accuracy.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD, 36mm width) |
| ACE | Angular Contact design, 25° contact angle |
| HC | Hybrid Ceramic balls (Ceramic balls with steel rings) |
| P4A | Super Precision tolerance class (superior running accuracy) |
| L1 | Light preload designation |
| DG | Universal matchable (can be paired in any combination) |
| A | Extra light preload class |
7011 ACE/HCP4AL1DGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls with steel rings significantly reduces centrifugal forces, enabling higher limiting speeds (34,000 rpm) while providing superior wear resistance and extended service life.
Phenolic Cage: The phenolic resin cage offers excellent dimensional stability at high speeds, contributing to smooth operation and reduced friction.
High Rigidity & Load Capacity: The angular contact design and 25° contact angle provide excellent stiffness and the ability to handle significant combined loads (Radial Dynamic: 5850 lbf, Static: 5220 lbf).
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration for precision applications.
Universal Matchability (SU): Bearings are universally matchable, allowing for flexible mounting in pairs (DB, DF, DT) to achieve the required preload and system rigidity without selective assembly.
7011 ACE/HCP4AL1DGA Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications demanding extreme accuracy and high rotational speeds, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles
- High-Speed Motors: Electric motor spindles, high-frequency spindles
- Precision Instrumentation: Measuring equipment, optical scanners
- Aerospace & Defense: Gyroscopes, radar systems, navigation equipment
- Robotics: High-precision robotic arm joints and actuators
