S7020 ACD/P4ATBTC
Sealed Super Precision Angular Contact Ball Bearings
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S7020 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The S7020 ACD/P4ATBTC is a precision angular contact ball bearing configured in a Triplex Back-to-Back (TBT) matched set. Engineered for applications demanding the highest levels of accuracy and rigidity, this bearing set is designed to handle significant combined loads—simultaneously supporting substantial radial and bidirectional axial forces. Its P4A tolerance class ensures exceptional dimensional and running accuracy, making it ideal for high-speed, high-precision spindles and other critical machinery where operational reliability is paramount.
S7020 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
- S7020: Basic bearing series, indicating a 100 mm bore, 150 mm OD, and 72 mm width.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Denotes an ultra-precision tolerance class, superior to ABEC 7 (P4), ensuring minimal runout and vibration.
- TBT: Specifies the bearing arrangement as a Triplex Back-to-Back matched set of three bearings, providing maximum rigidity and moment load capacity.
- Sealed: The bearing is sealed to protect against contamination.
- Preload: Moderate / Class C: The bearings are preloaded to a moderate level (Class C) within the set to eliminate internal clearance, ensuring high system stiffness and precise rotational accuracy.
S7020 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The Triplex Back-to-Back (TBT) arrangement of three bearings creates an extremely rigid support system, capable of withstanding heavy combined radial and axial loads as well as strong moment loads. This configuration is essential for maintaining precision under demanding operating conditions.
High-Speed Capability: The use of a lightweight, durable phenolic resin cage reduces centrifugal forces, enabling stable operation at high rotational speeds. The limiting speed of 16,250 rpm makes it suitable for demanding spindle applications.
Precision Performance: Manufactured to a P4A super-precision tolerance with a consistent 25° contact angle, this bearing set guarantees minimal runout, low noise, and low vibration, which is critical for achieving superior surface finishes and machining accuracy.
Optimized for Reliability: The standard grease lubrication and sealed design help to retain lubricant and exclude contaminants, contributing to long service life and reduced maintenance requirements in challenging environments.
S7020 ACD/P4ATBTC Bearing Typical Application Areas
The S7020 ACD/P4ATBTC is specifically designed for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles (e.g., CNC machining centers, grinding spindles)
- High-Frequency Motors
- Precision Rotary Tables
- Aerospace Test Equipment
- Other High-Precision Industrial Rotating Equipment
