61903-2RZ
618 & 619 Series Thin Section Bearings
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61903-2RZ Bearing Product Overview & Core Advantages
The 61903-2RZ is a metric single row deep groove ball bearing designed for high-precision applications requiring reliable performance in compact spaces. This sealed bearing excels in handling primarily radial loads while offering excellent operational characteristics. Its key advantages include a compact cross-section with a 7mm width, high rotational accuracy due to its P6 tolerance class, and long service life facilitated by integrated seals and factory-applied grease lubrication. It is engineered for applications demanding high reliability and consistent performance.
61903-2RZ Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 61903 | Series & Size Code | Indicates a deep groove ball bearing from the 619 series with a 17mm bore and 30mm outside diameter. |
| 2RZ | Seal Type | Designates non-contact rubber seals on both sides, offering effective contamination protection with minimal impact on the limiting speed. |
61903-2RZ Bearing Structural Features & Performance Benefits
Optimized Deep Groove Raceway: The geometry of the raceways is designed for efficient radial load distribution, contributing to stable operation and extended bearing life.
Integrated Sealing Solution: The 2RZ non-contact seals effectively shield the internal components from dust, moisture, and other contaminants, making the bearing suitable for environments where cleanliness is a concern. This design helps retain lubricant and significantly enhances operational reliability.
Precision and High-Speed Capability: Manufactured to a P6 tolerance class, this bearing ensures high running accuracy and smooth operation. The stainless steel cage and optimized internal design contribute to its high limiting speed of 26,000 rpm.
Pre-Lubricated for Maintenance-Free Operation: Filled with high-quality grease at the factory, the bearing is ready for immediate installation and offers long-term, maintenance-free service within its specified temperature range of -30°C to 120°C.
61903-2RZ Bearing Typical Application Areas
The 61903-2RZ is ideally suited for compact, high-speed mechanisms across various industries. Common applications include:
- Small Electric Motors: Used in fans, pumps, and power tools where reliability and speed are critical.
- Precision Instruments: Suitable for medical devices, optical encoders, and measuring equipment requiring high rotational accuracy.
- Office Automation Equipment: Found in printers, scanners, and copiers.
- Automotive Auxiliary Units: Applications such as idler pulleys and small alternators.
