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NACHI 6811ZNR Deep Groove Ball Bearings
NACHI 6811ZNR deep groove ball bearing. 55mm ID x 72mm OD x 9mm width. ZNR. Chrome steel construction.
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- 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
- Operating temperature range: -25°C to +120°C (standard grease)
- Pre-lubricated with high-performance grease - ready to install
- Single shield, snap-ring groove, and snap ring (ZNR) combine axial retention with dust protection
- Snap-ring groove for positive axial location without separate locking devices
- Standard CN clearance suits most general-purpose installations
| Brand | NACHI |
|---|---|
| Bearing Type | Deep Groove Ball Bearings |
| Series | 6811 |
| Inner Diameter (Bore) | 55 mm |
| Outer Diameter | 72 mm |
| Width | 9 mm |
| Seal Type | ZNR |
| Material | Chrome Steel (AISI 52100) |
| Clearance | CN |
| 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 | 0.085 kg |
| Features & Benefits | 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 Operating temperature range: -25°C to +120°C (standard grease) Pre-lubricated with high-performance grease - ready to install Single shield, snap-ring groove, and snap ring (ZNR) combine axial retention with dust protection Snap-ring groove for positive axial location without separate locking devices Standard CN clearance suits most general-purpose installations |
NACHI 6811ZNR Deep Groove Ball Bearings
The NACHI 6811ZNR 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 6811ZNR 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. Single shield, snap-ring groove, and snap ring (ZNR) combine axial retention with dust protection. The outer ring incorporates a snap-ring groove (and, where applicable, a supplied retaining ring) for simple axial location in housings – eliminating the need for separate locking devices.
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. Supplied with standard CN internal clearance, this bearing is suited to the widest range of general-purpose applications.
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
55 mm × 72 mm × 9 mm · ZZ · C3
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6811ZZ
KOYO 6811ZZ Deep Groove Ball Bearings
55 mm × 72 mm × 9 mm · ZZ · CN
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55x72x9TC
55x72x9TC Oil Seal – 55x72x9mm (Nitrile)
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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
55 mm × 72 mm × 9 mm · ZZ · C3
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6811C3
NACHI 6811C3 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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