618/670 TN
618 & 619 Series Thin Section Bearings
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Part No.
Part No.
618/670 TN
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
64 kg
Tolerance class
P6
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
670 mm
Bore diameter tolerance
-0.05mm to 0
Outside diameter
820 mm
Outside diameter tolerance
-0.06mm to 0
Width
69 mm
Width tolerance
-0.75mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
98017 lbf
Radial static load rating
216941 lbf
Limiting speed
0.8 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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618/670 TN Bearing Product Overview & Core Advantages
The 618/670 TN is a single row deep groove ball bearing designed for applications demanding high precision and reliability. This metric series bearing features a large 670 mm bore and is characterized by its ability to accommodate primarily radial loads. Its open design and P6 tolerance class make it an excellent choice for high-precision arrangements where controlled operating conditions are maintained. The use of a nylon cage contributes to smooth, quiet operation, suitable for a wide operating temperature range.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 618 | Series designation for extra-light series deep groove ball bearings. |
| 670 | Bore diameter in millimeters (670 mm). |
| TN | Indicates a nylon (polyamide) cage, offering reduced weight, lower friction, and excellent performance at moderate speeds. |
618/670 TN Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to a P6 tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring precise shaft positioning and system stability.
- Optimized Cage Design: The TN nylon cage is lightweight, promotes efficient lubrication distribution, and allows for quieter operation and lower operating temperatures compared to metallic cages.
- Radial Load Capacity: Engineered with a high radial dynamic load rating of 98,017 lbf and a radial static load rating of 216,941 lbf, providing reliable performance under significant radial forces.
- Material Integrity: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan within its specified temperature range.
618/670 TN Bearing Typical Application Areas
This bearing is suited for heavy-duty industrial machinery requiring large bore sizes and high precision, including:
- Large industrial gearboxes
- Heavy-duty electric motors and generators
- Mining and construction equipment
- Large pumps and compressors
- Paper and steel processing machinery
