7011 ACD/HCP4ATBTB
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7011 ACD/HCP4ATBTB
Basic Information
System of measurement
Metric
Weight
0.95 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
54 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
18135 lbf
Radial static load rating
20925 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7011 ACD/HCP4ATBTB Bearing Product Overview & Core Advantages
The 7011 ACD/HCP4ATBTB is a high-precision angular contact ball bearing configured as a matched triplex set in a back-to-back (TBT) arrangement. Engineered for superior rigidity and exceptional performance in demanding applications, this bearing set is designed to accommodate combined radial and axial loads simultaneously. The use of ceramic balls and a P4A super-precision tolerance class ensures high-speed capability, reduced friction, and extended service life, making it ideal for high-reliability, high-accuracy machinery.
7011 ACD/HCP4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD). |
| ACD | Angular Contact design with a 25° contact angle. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for enhanced speed and durability. |
| P4A | Super Precision tolerance class, exceeding ABEC 7/ISO P4 standards for running accuracy. |
| TBT | Triplex Back-to-Back matched set arrangement of three bearings for maximum moment stiffness. |
7011 ACD/HCP4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The triplex back-to-back (TBT) arrangement provides extremely high system rigidity, effectively resisting moment loads and complex combined loads. This configuration significantly increases the bearing set's overall dynamic and static load ratings.
- High-Speed & Low-Friction Performance: The combination of ceramic balls (silicon nitride) and a lightweight phenolic cage reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 34,000 rpm. This hybrid ceramic construction also provides electrical insulation and superior performance under lubrication-starved conditions.
- Precision and Stability: Manufactured to P4A tolerance class with a Light (Class B) preload, this bearing set ensures minimal runout, precise shaft positioning, and smooth, quiet operation critical for high-precision spindles.
- Optimized for Performance: The 25° contact angle offers an excellent balance between radial and axial load capacity. The open seal type allows for optimal lubrication flow and is intended for systems with external lubrication.
7011 ACD/HCP4ATBTB Bearing Typical Application Areas
This high-performance matched bearing set is specifically designed for the most demanding applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles requiring extreme precision and rigidity.
- Precision Robotics: Articulated arms and high-accuracy positioning systems.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical navigation and control equipment.
- High-Frequency Motors and Spindles: Applications where high rotational speeds and low vibration are paramount.
