7012 ACBGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7012 ACBGA/P4A Bearing Product Overview & Core Advantages
The 7012 ACBGA/P4A is a single row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Manufactured to the stringent P4A tolerance class, this bearing is engineered to accommodate high axial loads in one direction while simultaneously handling significant radial loads. Its extra light preload (Class A) ensures minimal deflection and smooth operation, making it an ideal choice for high-speed spindles and other precision machinery. The bearing is universally matchable (SU), allowing for flexible mounting arrangements in duplex sets to achieve various preload and stiffness characteristics.
7012 ACBGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Standard bearing series number, indicating a 60 mm bore, 95 mm OD, and 18 mm width. |
| AC | Angular Contact design with a 25° contact angle, optimized for combined loads. |
| B | Designates a 40° contact angle (Note: Specification states 25°, please verify design code). |
| GA | Indicates Universal Matchable bearings supplied with a specific axial internal clearance for preload when mounted in pairs. |
| P4A | The tolerance class, signifying superior dimensional and running accuracy beyond ABEC 7/ISO P4 standards. |
7012 ACBGA/P4A Bearing Structural Features & Performance Benefits
High-Precision Construction: The 7012 ACBGA/P4A features a phenolic resin cage, which is lightweight and ideal for high-speed operation, contributing to its limiting speed of 39,000 rpm. The open seal type minimizes friction and heat generation, further enhancing its high-speed capability.
Superior Load Capacity: With a 25° contact angle and high-grade chrome steel components, this bearing offers an excellent balance between radial dynamic load rating (3038 lbf) and axial load carrying capacity.
Pre-Configured for Performance: The extra light preload (Class A) reduces system deflection and improves rotational accuracy right from installation. Its universal matchability (SU) allows engineers to create back-to-back (DB) or face-to-face (DF) arrangements from a single bearing type, simplifying inventory and enabling optimized stiffness and thermal expansion management in the application.
7012 ACBGA/P4A Bearing Typical Application Areas
The 7012 ACBGA/P4A is specifically engineered for high-performance applications, including:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors and Precision Spindles
- Robotic Drives and Rotary Tables
- Medical Equipment (e.g., high-speed dental handpieces)
- Aerospace Actuation Systems
