7011 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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7011 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The 7011 ACB/HCP4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its defining features include a P4A super-precision tolerance, a ceramic ball construction, and an extra light preload (Class A), making it an ideal solution for high-rigidity, high-reliability spindles and machinery where minimal runout and thermal stability are critical.
Model Code Breakdown
- 7011: Basic series number (55mm bore, 90mm OD).
- ACB: Angular Contact Bearing with a 25° contact angle.
- HC: Hybrid Ceramic - Signifies the use of ceramic balls with steel rings.
- P4A: Super Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards, ensuring extremely tight dimensional and running accuracy.
- DGA: Universal Matchable (SU) Duplex Set in a Back-to-Back (DB) arrangement. The bearings are supplied as a pre-ground pair, ready for installation.
7011 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex pair (SU match) and P4A tolerance class create an exceptionally stiff and precise bearing system, capable of maintaining accuracy under high loads and speeds. The extra light preload eliminates internal clearance, reducing vibration and improving machining finish.
Enhanced High-Speed Capability: The combination of ceramic balls (lighter and harder than steel) and a phenolic resin cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 34,000 rpm. This design also reduces heat generation.
Superior Load Capacity: The 25° contact angle is optimized to handle significant axial loads in one direction, as well as combined radial and axial loads, making it suitable for demanding applications like machine tool spindles.
Pre-Lubricated & Open Design: The bearing is lubricated for immediate use and features an open design, which is optimal for systems with centralized lubrication, allowing for efficient coolant and lubricant flow.
7011 ACB/HCP4ADGA Bearing Typical Application Areas
This high-performance bearing is specifically designed for advanced machinery requiring the utmost precision and speed, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Robotic Arm Drives
- Advanced Dental and Medical Equipment Spindles
