7044 CDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7044 CDGA/P4A Bearing Product Overview & Core Advantages
The 7044 CDGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Manufactured to P4A tolerance class, this single bearing offers superior running accuracy and is universally matchable (SU), allowing for precise preload control when paired with a second bearing. Its 15° contact angle is optimized to handle significant combined loads, including high radial loads and axial loads in one direction. The extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed operation up to 11,000 rpm.
7044 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7044 | Standard bore diameter (220 mm) and outside diameter (340 mm) designation. |
| C | Indicates a 15° contact angle. |
| DG | The bearing is universally matchable (SU). Two bearings can be paired in a duplex set to support axial loads in both directions. |
| A | Specifies an extra light preload (Class A). |
| /P4A | Denotes a high-precision tolerance class with very tight dimensional and running accuracy limits. |
7044 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Built to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal runout and vibration, providing the high rigidity required for precision applications.
Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently support combined radial and axial loads. With a dynamic load rating of 76,050 lbf and a static load rating of 102,375 lbf, it offers robust performance under demanding conditions.
Optimized High-Speed Performance: The phenolic cage is lightweight and possesses excellent sliding properties, reducing centrifugal forces and friction. Combined with the extra light preload, this allows the bearing to achieve a high limiting speed of 11,000 rpm.
Premium Material Construction: The rings and balls are made from high-grade chrome steel, providing high hardness, wear resistance, and a long operational lifespan.
7044 CDGA/P4A Bearing Typical Application Areas
The 7044 CDGA/P4A is engineered for high-performance machinery where precision and speed are critical. Its primary applications include:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring high rigidity and running accuracy.
- High-Frequency Motors and Spindles: Where low friction and high-speed capability are essential.
- Precision Gearboxes and Pumps: To ensure smooth operation and handle combined loads efficiently.
- Aerospace and Defense Positioning Systems: Demanding the reliability of precision bearings.
