618/6
618 & 619 Series Thin Section Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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618/6 Bearing Product Overview & Core Advantages
The 618/6 is a single row deep groove ball bearing designed for compact applications requiring high precision and reliable performance. As a metric miniature bearing, it excels in handling radial loads efficiently while offering smooth operation. Its open design and P6 tolerance class ensure exceptional dimensional accuracy and rotational precision, making it ideal for high-speed applications where space is limited and reliability is critical.
618/6 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 618 | Series designation for extra-small, deep groove ball bearings |
| 6 | Bore diameter: 6 mm |
| Open | No seals or shields, allowing for higher speeds and easy relubrication |
| P6 | Tolerance class offering higher precision than standard bearings |
| CN | Normal radial internal clearance group |
618/6 Bearing Structural Features & Performance Benefits
Deep Groove Design: The continuous raceway geometry enables excellent performance under radial loads and moderate axial loads in both directions.
High-Speed Capability: With a limiting speed of 67,000 rpm and stainless steel cage, this bearing maintains stability and reduces friction at high rotational velocities.
Precision Engineering: Manufactured to P6 tolerance class with tight dimensional controls (bore and OD tolerance: -0.007mm to 0), ensuring consistent performance in precision applications.
Material Excellence: Chrome steel rings and balls provide high hardness and wear resistance, while the stainless steel cage offers corrosion resistance and durability.
Compact & Lightweight: With dimensions of 6×13×3.5 mm and weighing only 0.0042 kg, it's ideal for space-constrained applications without compromising load capacity.
618/6 Bearing Typical Application Areas
- Small electric motors and miniature DC motors
- Precision instruments and laboratory equipment
- Medical devices and dental handpieces
- Office automation equipment including printers and scanners
- Robotics and miniature gearboxes
- Computer cooling fans and small pumps
- Optical encoders and positioning systems
