618/7
618 & 619 Series Thin Section Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
618/7
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0022 kg
Tolerance class
P6
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
14 mm
Outside diameter tolerance
-0.007mm to 0
Width
3.5 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
175 lbf
Radial static load rating
58 lbf
Limiting speed
63 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 9.61
/ each
In Stock
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Product Overview & Key Advantages
The 618/7 is a metric single row deep groove ball bearing engineered for high-precision applications requiring compact design and reliable performance. As an open-type bearing, it is optimized for radial loads and offers excellent operational characteristics within its designated speed and temperature ranges. Manufactured to a P6 tolerance class, this bearing ensures superior running accuracy, making it ideal for applications demanding minimal vibration and precise rotation. Its compact cross-section (3.5 mm width) allows for integration into space-constrained assemblies without compromising performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 618 | Series designation for extra thin-section, deep groove ball bearings. |
| /7 | Indicates a bore diameter of 7 mm. |
| (No Seal Suffix) | The bearing is open, allowing for high-speed operation and facilitating custom lubrication schemes if required. |
618/7 Bearing Structural Features & Performance Benefits
- High-Precision Design: Built to P6 tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring excellent running accuracy and system stability.
- Robust Material Construction: Features rings and balls made from chrome steel for high load capacity and durability, combined with a stainless steel cage for superior corrosion resistance and cage integrity at high speeds.
- Optimized for Radial Loads: The deep groove raceway and single row design are engineered to efficiently handle radial dynamic and static loads (175 lbf and 58 lbf respectively).
- High-Speed Capability: The open design and stainless steel cage contribute to a high limiting speed of 63,000 rpm, suitable for demanding high-rotation applications.
- Standard Internal Clearance: The CN radial internal clearance is the standard group, providing a versatile fit for a wide range of operating conditions.
618/7 Bearing Typical Application Areas
This bearing is commonly specified in:
- Precision Instruments and small medical devices
- Small electric motors and miniature gearboxes
- Office automation equipment, such as printers and scanners
- Robotics and small automation assemblies
- Low-torque, high-speed spindles
