3308 A-2RS1TN9/MT33
Double Row Angular Contact Ball Bearings
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3308 A-2RS1TN9/MT33 Bearing Product Overview & Core Advantages
The 3308 A-2RS1TN9/MT33 is a metric double row angular contact ball bearing engineered for high-performance applications requiring superior rigidity and reliability. This sealed precision bearing is designed to accommodate combined loads—simultaneously handling significant radial loads and bidirectional axial loads. Its compact bearing dimensions (40 mm bore, 90 mm OD, 36.5 mm width) and P6 (ABEC-3) tolerance class make it an ideal component for machinery demanding high precision, high rigidity, and consistent operation under challenging conditions.
3308 A-2RS1TN9/MT33 Bearing Model Code Explained, Specifications & Naming Convention
- 3308: Basic series designation, indicating a medium series double row angular contact ball bearing with a 40mm bore.
- A: Signifies a specific contact angle of 30 degrees, optimized for carrying substantial axial loads.
- 2RS1: Denotes the bearing is fitted with two rubber contact seals (RS1 type) on both sides, providing excellent protection against contaminants and retaining lubricant.
- TN9: Indicates the cage is made of glass fiber reinforced polyamide 66 (PA66), a material suitable for high speeds and offering good strength-to-weight ratio.
- MT33: Specifies the bearing is pre-lubricated with a high-performance lithium soap complex grease, suitable for the specified temperature range and offering long-term lubrication.
3308 A-2RS1TN9/MT33 Bearing Structural Features & Performance Benefits
The design of the 3308 A-2RS1TN9/MT33 translates directly into key performance benefits:
- High Rigidity & Load Capacity: The double row design and 30-degree contact angle provide exceptional rigidity, enabling stable support for shafts and effective handling of combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight and robust TN9 polyamide cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 5,000 rpm. The optimized internal geometry further enhances its high-speed capability.
- Long-Term, Maintenance-Free Operation: The combination of effective rubber contact seals (2RS1) and a high-quality pre-filled grease (MT33) creates a sealed, lubricated-for-life system. This significantly extends service intervals and ensures reliable performance in contaminated environments.
- Precision Engineering: Manufactured to a P6 tolerance class, this bearing ensures precise running accuracy and low noise and vibration levels, which is critical for precision applications.
3308 A-2RS1TN9/MT33 Bearing Typical Application Areas
This versatile and robust bearing is commonly specified in:
- Machine Tool Spindles
- Industrial Pumps and Compressors
- Gearboxes and Transmission Systems
- Precision Agricultural and Construction Machinery
- Material Handling Equipment
