S7007 ACD/P4AQBCB
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
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S7007 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The S7007 ACD/P4AQBCB is a metric precision angular contact ball bearing configured in a quadruplex back-to-back (QBC) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is preloaded to Light / Class B and manufactured to a P4A tolerance class for superior running precision. Its sealed design and phenolic cage make it an ideal solution for high-speed operation and high rigidity requirements, capable of handling significant combined loads.
S7007 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
- S7007: Basic bearing series and size designation (35mm bore, 62mm OD).
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Denotes a super-precision tolerance class, exceeding ABEC 7 standards.
- QBC: Indicates the bearing is part of a Quadruplex Back-to-Back matched set of 4 bearings.
- B: Specifies the Light preload level applied to the matched set.
S7007 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back (QBC) arrangement provides an extremely stiff bearing system, offering superior resistance to moment loads and enabling high operational rigidity. The 25° contact angle is optimized to support substantial combined radial and axial loads.
High-Speed Performance: The lightweight phenolic cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 41,000 rpm. The bearings are pre-lubricated with grease, ready for immediate use.
Precision & Reliability: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this set guarantees precise shaft positioning and smooth, quiet running. The sealed design helps retain lubrication and exclude contaminants.
S7007 ACD/P4AQBCB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is typically employed in demanding applications such as:
- Machine Tool Spindles (e.g., for milling, grinding, and high-speed machining centers)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Medical and Dental Equipment Drives
- Aerospace Actuation Systems
