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NACHI 6904ZZEC3 Deep Groove Ball Bearings
NACHI 6904ZZEC3 deep groove ball bearing. 20mm ID x 37mm OD x 9mm width. ZZE 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
- Double metal shields (ZZE) protect against dust and debris on both sides while retaining the factory-filled grease
- 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
| Brand | NACHI |
|---|---|
| Bearing Type | Deep Groove Ball Bearings |
| Series | 6904 |
| Inner Diameter (Bore) | 20 mm |
| Outer Diameter | 37 mm |
| Width | 9 mm |
| Seal Type | ZZE |
| Material | Chrome Steel (AISI 52100) |
| Clearance | C3 |
| Dynamic Load Rating (Cr) | 6350 N (6.35 kN) |
| Static Load Rating (C₀) | 3700 N |
| Limiting Speed (Grease) | 19000 rpm |
| Limiting Speed (Oil) | 23000 rpm |
| Fillet Radius (r min) | 0.3 mm |
| Weight | 0.036 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 Double metal shields (ZZE) protect against dust and debris on both sides while retaining the factory-filled grease 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 |
NACHI 6904ZZEC3 Deep Groove Ball Bearings
The NACHI 6904ZZEC3 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 20 mm, outer diameter of 37 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 6904ZZEC3 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. Double metal shields (ZZE) protect against dust and debris on both sides while retaining the factory-filled grease.
Performance
Rated for a basic dynamic load capacity of 6.3 kN and a static load capacity of 3.7 kN, this bearing delivers dependable load-carrying ability and long calculated service life under correct operating conditions. Permissible speeds reach 19,000 rpm with grease lubrication and 23,000 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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6904-2RSC3
KOYO 6904-2RSC3 Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · 2RS · C3
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6904ZZC3
KOYO 6904ZZC3 Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · ZZ · C3
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6904-2RS
KOYO 6904-2RS Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · 2RS · CN
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6904ZZ
KOYO 6904ZZ Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · ZZ · CN
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7904CTYNDULP4/IJK
IJK Angular Contact Ball Bearing Precision Set 20x37x9
20 mm × 37 mm × 9 mm · Open
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6904ZENR
NACHI 6904ZENR Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · ZENR · CN
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6904NR
NACHI 6904NR Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · NR · CN
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6904-2NSEC3
NACHI 6904-2NSEC3 Deep Groove Ball Bearings
20 mm × 37 mm × 9 mm · 2NSE / 2RS · C3
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