7044 CD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7044 CD/P4A Bearing Product Overview & Core Advantages
The 7044 CD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. This metric bearing is designed to accommodate primarily axial loads in one direction, as well as combined radial and axial loads. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for machine tool spindles and other high-performance machinery. The bearing is pre-lubricated and features a phenolic cage, contributing to its high-speed capability and stable operation.
7044 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7044 | Basic bearing series, defining the standard boundary dimensions (Bore: 220mm, OD: 340mm, Width: 56mm). |
| CD | Indicates a specific contact angle of 15° and internal design optimized for high rigidity and precise axial load carrying capacity. |
| P4 | Denotes the tolerance class P4 (ABEC-7), signifying very high precision levels for dimensional and running accuracy. |
| A | Signifies that the bearing is supplied with a specific preload to enhance system rigidity and minimize axial and radial runout. |
7044 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 15° contact angle and P4 precision are key to providing high system stiffness and exceptional running accuracy, crucial for applications like machine tool spindles.
- Optimized Load Capacity: Engineered to handle significant axial loads in one direction and combined loads effectively, with a high dynamic load rating of 76,050 lbf and static load rating of 102,375 lbf.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 6,000 rpm. The open design and pre-lubrication facilitate efficient heat dissipation.
- Durable Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high fatigue life and durability under demanding operating conditions.
7044 CD/P4A Bearing Typical Application Areas
The 7044 CD/P4A is ideally suited for high-precision, high-speed rotational systems, including:
- Machine Tool Spindles (Milling, Grinding, Turning Centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes
- Aerospace Positioning Systems
- Medical and Laboratory Centrifuges
