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NACHI 6811C3 Deep Groove Ball Bearings
NACHI 6811C3 deep groove ball bearing. 55mm ID x 72mm OD x 9mm width. Open with C3 clearance. Chrome steel construction.
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- C3 clearance accommodates thermal expansion in hot-running applications
- Chrome steel (AISI 52100) rings and balls for durability and fatigue resistance
- Conforms to ISO dimension standards and interchanges with equivalent series
- Handles both radial and moderate axial loads in either direction
- High-speed capability with low noise and vibration
- Open design with no seals or shields, allowing free Oil and Grease flow and easy re-lubrication in service
- Operating temperature range: -25°C to +120°C (standard grease)
- Ready to Install
| Brand | NACHI |
|---|---|
| Bearing Type | Deep Groove Ball Bearings |
| Series | 6811 |
| Inner Diameter (Bore) | 55 mm |
| Outer Diameter | 72 mm |
| Width | 9 mm |
| Seal Type | Open |
| Material | Chrome Steel (AISI 52100) |
| Clearance | C3 |
| Dynamic Load Rating (Cr) | 8800 N (8.8 kN) |
| Static Load Rating (C₀) | 8100 N |
| Limiting Speed (Grease) | 8700 rpm |
| Limiting Speed (Oil) | 10000 rpm |
| Fillet Radius (r min) | 0.3 mm |
| Weight | 0.083 kg |
| Features & Benefits | C3 clearance accommodates thermal expansion in hot-running applications Chrome steel (AISI 52100) rings and balls for durability and fatigue resistance Conforms to ISO dimension standards and interchanges with equivalent series Handles both radial and moderate axial loads in either direction High-speed capability with low noise and vibration Open design with no seals or shields, allowing free Oil and Grease flow and easy re-lubrication in service Operating temperature range: -25°C to +120°C (standard grease) Ready to Install |
NACHI 6811C3 Deep Groove Ball Bearings
The NACHI 6811C3 is a high-quality single-row deep groove ball bearing engineered to deliver reliable performance across a broad spectrum of industrial and commercial applications. With a bore diameter of 55 mm, outer diameter of 72 mm, and a width of 9 mm, this bearing conforms to ISO dimension standards and is a direct interchange for equivalent series bearings from other manufacturers.
Design & Construction
Manufactured by NACHI – one of Japan’s leading bearing producers – the 6811C3 is precision-ground from high-carbon chromium bearing steel (AISI 52100 / JIS SUJ2), heat-treated to achieve optimum hardness and fatigue resistance. The deep raceway grooves in both the inner and outer rings enable the bearing to support radial loads as well as moderate axial loads in either direction. Open design with no seals or shields, allowing free Oil and Grease flow and easy re-lubrication in service.
Performance
Rated for a basic dynamic load capacity of 8.8 kN and a static load capacity of 8.1 kN, this bearing delivers dependable load-carrying ability and long calculated service life under correct operating conditions. Permissible speeds reach 8,700 rpm with grease lubrication and 10,000 rpm with oil lubrication, making it well suited to high-speed rotating equipment. This variant features C3 internal clearance – a wider-than-standard radial play that accommodates thermal expansion in elevated-temperature environments such as electric motors, dryers, and heat-intensive machinery.
Typical Applications
- Electric motors, generators, and alternators
- Pumps, compressors, and blowers
- Conveyor and material-handling systems
- Agricultural and farming equipment
- Power tools and woodworking machinery
- Automotive ancillaries – water pumps, tensioners, idlers
- HVAC fans, air-conditioning units, and refrigeration
- Food and beverage processing machinery
- Gearboxes, reducers, and transmission assemblies
- General industrial and workshop machinery
Substitute Products
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6811ZZC3
KOYO 6811ZZC3 Deep Groove Ball Bearings
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6811ZZ
KOYO 6811ZZ Deep Groove Ball Bearings
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55x72x9TC
55x72x9TC Oil Seal – 55x72x9mm (Nitrile)
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6811ZNR
NACHI 6811ZNR Deep Groove Ball Bearings
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6811NR
NACHI 6811NR Deep Groove Ball Bearings
55 mm × 72 mm × 9 mm · NR · CN
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6811ZZC3
NACHI 6811ZZC3 Deep Groove Ball Bearings
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6811
NACHI 6811 Deep Groove Ball Bearings
55 mm × 72 mm × 9 mm · Open · CN
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6811ZZ
NACHI 6811ZZ Deep Groove Ball Bearings
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