3308 DMA
Double Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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3308 DMA Bearing Product Overview & Core Advantages
The 3308 DMA is a metric double row angular contact ball bearing engineered for applications demanding high precision and reliability. This bearing is specifically designed to accommodate combined loads, simultaneously supporting significant radial loads and axial loads in both directions. Its double row ball construction provides superior high rigidity, making it an ideal choice for machinery requiring precise shaft positioning and minimal deflection. Manufactured to a P6 (ABEC-3) tolerance class, it ensures consistent performance in high-speed and high-accuracy environments.
3308 DMA Bearing Model Code Explained, Specifications & Naming Convention
The model number 3308 DMA provides specific technical information:
- 3308: Basic bearing designation indicating a 40mm bore, 90mm OD, and 36.5mm width.
- D: Signifies a Double Row angular contact design.
- M: Indicates the use of a Brass Cage (Machined).
- A: Denotes a 30° contact angle, optimized for handling higher axial loads.
3308 DMA Bearing Structural Features & Performance Benefits
The 3308 DMA's performance is derived from its robust construction:
- High Rigidity & Load Capacity: The double row of balls and the 30° contact angle create a stiff bearing arrangement capable of handling high radial and bidirectional axial loads.
- Precision & Speed: Built to P6 precision class and featuring a robust brass cage, this bearing maintains stability and integrity at its limiting speed of 7,000 rpm.
- Durability & Reliability: Components made from chrome steel offer excellent wear resistance and fatigue life. The open seal type allows for custom lubrication schemes to suit specific operational needs.
3308 DMA Bearing Typical Application Areas
The 3308 DMA is suited for a wide range of industrial machinery where precision and rigidity are paramount. Key applications include:
- Machine Tool Spindles
- Gearboxes and Transmissions
- Industrial Pumps and Compressors
- Precision Agricultural Equipment
