61903-2RS1/C3LHT23
618 & 619 Series Thin Section Bearings
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61903-2RS1/C3LHT23 Bearing Product Overview & Core Advantages
The 61903-2RS1/C3LHT23 is a miniature deep groove ball bearing designed for compact, high-precision applications. This sealed single row bearing excels in providing reliable radial load support in space-constrained environments. Its key advantages include a high limiting speed of 32,000 rpm, a generous C3 radial internal clearance suitable for thermal expansion scenarios, and a robust sealed construction for long-term performance. Manufactured to ABEC 1 | ISO P0 tolerance standards, it delivers consistent operation and is compliant with RoHS and REACH directives.
61903-2RS1/C3LHT23 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance |
|---|---|---|
| 61903 | Basic designation for a metric, single row deep groove ball bearing with a 17mm bore. | Defines the core bearing type and bearing dimensions. |
| 2RS1 | Bearing with contact seals on both sides. | Provides effective protection against contaminants and retains lubricant, enhancing service life. |
| C3 | Radial internal clearance greater than Normal group. | Accommodates thermal expansion in applications with high rotational speeds or temperature gradients. |
| LHT23 | Specifies the type of high-temperature grease used. | Ensures stable lubrication performance across the specified temperature range of -30°C to 120°C. |
61903-2RS1/C3LHT23 Bearing Structural Features & Performance Benefits
- Robust Sealed Construction: The 2RS1 contact seals effectively shield the bearing's interior from dust, moisture, and other contaminants. This design preserves the integrity of the LHT23 grease, making the unit highly reliable and suitable for applications where re-lubrication is difficult.
- Optimized for High-Speed Operation: The combination of a chrome steel cage, precision-ground chrome steel balls, and high-quality grease enables a high limiting speed, making it ideal for demanding, high-RPM applications.
- Enhanced Thermal Stability: The C3 radial internal clearance is a critical feature that prevents preload and potential binding under operational thermal expansion, ensuring smooth running and extended bearing life.
- High Load Capacity for its Size: Despite its miniature bearing dimensions (17mm bore, 30mm OD, 7mm width), it offers a substantial radial dynamic load rating of 1039 lbf, providing excellent power density.
61903-2RS1/C3LHT23 Bearing Typical Application Areas
This miniature deep groove ball bearing is engineered for precision and performance in compact machinery. Its typical applications include:
- Small Electric Motors: Used in high-speed fans, hand tools, and drone motors.
- Precision Instrumentation: Ideal for medical devices, optical encoders, and laboratory equipment.
- Office Automation Equipment: Critical components in printers, scanners, and small copiers.
- Computer Peripheral Devices: Such as hard disk drive spindles and cooling fans.
