61903-RS1
618 & 619 Series Thin Section Bearings
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Part No.
Part No.
61903-RS1
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.016 kg
Tolerance class
ABEC 1 | ISO P0
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
30 mm
Outside diameter tolerance
-0.008mm to 0
Width
7 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
1039 lbf
Radial static load rating
573 lbf
Limiting speed
32 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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61903-RS1 Bearing Product Overview & Core Advantages
The 61903-RS1 is a metric single row deep groove ball bearing designed for compact applications requiring reliable performance. Its key advantage lies in its sealed construction, which provides built-in protection against contamination and retains lubrication, making it a maintenance-free solution. This bearing is engineered to primarily handle radial loads and is characterized by its small cross-section, high precision ABEC 1 tolerance, and robust chrome steel construction, ensuring long service life and consistent operation in a variety of industrial settings.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 61903 | Basic bearing designation indicating a deep groove ball bearing with a 17mm bore, 30mm OD, and 7mm width. |
| RS1 | Denotes a synthetic rubber contact seal on one side. This seal effectively excludes contaminants and retains lubricant, enhancing bearing life in dirty environments. |
61903-RS1 Bearing Structural Features & Performance Benefits
- Sealed Design: The RS1 seal provides excellent protection against dust, moisture, and other contaminants, making the bearing suitable for harsh environments and contributing to its maintenance-free characteristic.
- High Precision: Manufactured to ABEC 1 (ISO P0) tolerance class, this bearing ensures smooth and quiet operation with minimal vibration, which is critical for applications requiring consistent performance.
- Robust Construction: Made entirely from chrome steel (rings, balls, and cage), the bearing offers high strength, good wear resistance, and a long operational lifespan under standard radial dynamic and static loads.
- Compact & Lightweight: With a small cross-section (7mm width) and a weight of only 0.016 kg, it is ideal for space-constrained applications where saving weight and volume is essential.
61903-RS1 Bearing Typical Application Areas
This versatile sealed ball bearing is commonly found in:
- Small electric motors and gearboxes
- Office machinery and computer cooling fans
- Medical devices and dental handpieces
- Conveyor system rollers and idler pulleys
- Precision instruments and low-power drives
