TIMKEN Bearing Types, Cages, and Tolerance Technology Analysis
Angular Contact Ball Bearing Product Types and Applications
TIMKEN offers a comprehensive range of angular contact ball bearings, covering the single-row 7200 & 7300 series and the double-row 3200 & 3300 series. Designed to withstand both radial and thrust loads, these bearings are widely used in industrial equipment such as pumps, compressors, and electric motors.
The product line includes:
Single-Row Standard Design (7200 & 7300 Series): Features a 40° contact angle, Class P0 tolerances, and offers a choice of brass or polyamide cages. This makes them suitable for general-purpose applications.
Single-Row Universal Matched Design (7200 & 7300 Series): Also with a 40° contact angle but upgraded to Class P5 tolerances. This higher precision is ideal for paired arrangements, such as in machine tool spindles.
Double-Row Design (3200 & 3300 Series): Features a 30° contact angle and Class P0 tolerances. With cages made of polyamide or steel, they are capable of handling heavier loads and are commonly used in heavy-duty machinery.
All products comply with ISO standards, are dimensionally interchangeable with competitive metric bearings, and the double-row series is available with both standard and C3 internal clearances.
The Critical Role of Cages and Selection Guide
The cage is a core component of the bearing. By maintaining uniform spacing between the balls, it directly impacts the bearing's limiting speed, torque characteristics, temperature limits, and lubrication flow.
TIMKEN provides four main types of cages to suit different operating conditions:
| Type | Design Features | Key Advantages | Typical Applications |
|---|---|---|---|
| Molded Polyamide Cage (Single Row) | Made of glass-fiber reinforced Polyamide 66; ball-centered design. | Reduces friction torque; resistant to oils, greases, and solvents; accommodates minor misalignment. | General industrial equipment. |
| Machined Brass Cage (Single Row) | Made from solid brass; ball-centered design. | Superior strength; excellent damping properties; withstands high stress and shock loads. | High-speed spindles, heavy loads. |
| Polymer Crown-Type Cage (Double Row) | Glass-fiber reinforced Polyamide 66; additional reinforcement for stability. | Corrosion-resistant; allows for some misalignment; smooth operation. | Applications requiring corrosion resistance. |
| Pressed Steel Cage (Double Row) | One-piece cage made from pressed steel; ball-centered design. | Rigid, lightweight, and economical; allows for high-speed operation. | Cost-sensitive, high-speed applications. |
Precision and Interchangeability (Metric Tolerances)
TIMKEN single-row angular contact ball bearings are manufactured to strict metric specifications.
Standard Precision: Normal tolerance bearings generally meet Class P0 requirements according to ISO 492 standards.
High Precision: Bearings marked with the P5 designation meet the stricter Class P5 standards.
The term "deviation" refers to the difference between the actual dimension and the theoretical dimension, ensuring that TIMKEN bearings offer reliable performance and interchangeability in global industrial applications.
Timken bearings Catalog
