619/4-2Z
618 & 619 Series Thin Section Bearings
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619/4-2Z Bearing Product Overview & Core Advantages
The 619/4-2Z is a metric miniature deep groove ball bearing designed for applications demanding high precision and reliability in compact spaces. As a single row bearing with shielded construction, it excels at handling primarily radial loads while offering protection from contamination. Its small bearing dimensions (4mm bore, 11mm OD, 4mm width) and P6 tolerance class make it an ideal component for high-speed, precision mechanisms requiring consistent performance and long service life.
619/4-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 619 | Series designation for extra small, deep groove ball bearings. |
| 4 | Nominal bore diameter in millimeters (4 mm). |
| 2Z | Bearing is equipped with shields on both sides. This provides effective protection against solid contaminants while allowing higher limiting speeds compared to contact seals. |
619/4-2Z Bearing Structural Features & Performance Benefits
Optimized for Miniature Applications: The single row deep groove raceway and precision-ground chrome steel components provide smooth operation and low noise, essential for sensitive equipment. The stainless steel cage ensures stability and durability at high rotational speeds.
High-Speed Capability: With a limiting speed of 63,000 rpm, this bearing is engineered for high-speed operation. The non-contact 2Z shields minimize friction, and the pre-applied grease lubrication is formulated for a wide temperature range (-30°C to 120°C), contributing to its excellent high-speed performance.
Maintenance-Free Operation: The combination of shielded design and factory-applied grease makes the bearing lubricated for life in many applications, reducing the need for maintenance and ensuring long-term reliability.
619/4-2Z Bearing Typical Application Areas
The 619/4-2Z is widely used in precision industries and compact devices, including:
- Small Precision Motors and stepper motors
- Medical and Dental Handpieces
- Office automation equipment such as printers and scanners
- Instrumentation and measurement devices
- Small fans, pumps, and high-speed spindles
