6404 Deep Groove Ball Bearing For Electric Motors & Industrial Machinery | 20×72×19 mm
The 6404 is a Single Row Deep Groove Ball Bearing designed for dependable performance in a wide spectrum of industrial and mechanical applications. Featuring a deep groove raceway geometry, this bearing efficiently accommodates radial loads as well as moderate axial loads in both directions. With a 20 mm bore, 72 mm outer diameter, and a 19 mm width, it provides a robust and versatile solution for various machinery. Available with different sealing options (open, metal shields, or rubber seals), it is ideal for electric motors, pumps, gearboxes, fans, and other equipment requiring smooth, low‑noise operation and long service life.
6404 Deep Groove Ball Bearing 20x72x19 mm | 64 Series | Open Type (with sealing options available)
A widely used industrial bearing featuring the standard deep groove raceway geometry. Engineered for stable and reliable operation at speeds up to 15,000 r/min (grease lubrication) with a reference speed of 24,000 r/min. The 6404 combines a robust construction with high load capacity, making it a reliable choice for various industrial machinery, electric motors, and mechanical transmissions.

Ideal for a broad range of industrial equipment and mechanical drives:
The 6404 features a deep groove raceway and a robust internal geometry, enabling it to handle substantial radial loads and moderate axial loads in both directions. With dynamic and static load ratings of 30.7 kN and 15 kN respectively, it is well‑suited for demanding industrial applications.
Available in open, shielded (ZZ), or sealed (2RS) versions, the 6404 can be tailored to specific application requirements. The open design allows for high‑speed operation and re‑lubrication, while shielded or sealed variants provide protection against contamination and lubricant retention.
Manufactured from high‑quality chrome steel (GCR15 / SAE 52100) and precision ground, the 6404 ensures long‑lasting performance under continuous operation. Its sturdy design resists wear and fatigue, contributing to extended service life in harsh environments.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 64 Series |
| Basic Designation | 6404 |
| Suffix | Open (no suffix), ZZ (metal shields), 2RS (rubber seals) available |
| Bore Diameter (d) | 20 mm |
| Outer Diameter (D) | 72 mm |
| Width (B) | 19 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | Standard / P5 Grade Available |
| Cage Material | Pressed Steel or Polyamide (depending on version) |
| Dynamic Load Rating (Cʳ) | 30.7 kN |
| Static Load Rating (C₀ʳ) | 15 kN |
| Limiting Speed (Grease) | 24,000 r/min |
| Limiting Speed (Oil) | 15,000 r/min |
| Weight (approx.) | 0.4 kg |
Common manufacturer equivalents include:
The 6404 is typically supplied as an open bearing (without seals or shields), allowing maximum speed and flexibility for re‑lubrication. For applications requiring protection against dust or moisture, shielded (ZZ) or sealed (2RS) versions are available upon request. The bearing is pre‑lubricated with high‑quality grease in its sealed variants, while open bearings require initial lubrication during installation. Its standard dimensions conform to ISO series 64, ensuring interchangeability with major bearing brands worldwide.
"For electric motors, pumps, gearboxes, and a wide range of industrial machinery, the 6404 deep groove ball bearing offers a perfect balance of load capacity, speed capability, and durability. Its versatile design and availability with different sealing options make it a go‑to choice for maintenance and OEM applications."
The 6416 Open is a Single Row Deep Groove Ball Bearing engineered for high radial load capacity and durable performance in demanding industrial environments. Featuring a classic open design (No shields or seals), this model allows for maximum flexibility in lubrication methods, making it ideal for applications requiring high-speed operation or specific grease maintenance schedules. With a substantial 80mm bore and robust 48mm width, the 6416 is built to deliver reliable service in heavy machinery, industrial gearboxes, and large electric motors.
Details
The 6417 Open is a Single Row Deep Groove Ball Bearing engineered for high radial load capacity and durable performance in demanding industrial environments. With a substantial 85mm bore and robust 52mm width, the 6417 is built to deliver reliable service in heavy machinery, industrial gearboxes, and large electric motors. Featuring a classic open design (No shields or seals), this model allows for maximum flexibility in lubrication methods, making it ideal for applications requiring high-speed operation or specific grease maintenance schedules.
Details
The 6418 is a single-row deep groove ball bearing with an open design, engineered for heavy-duty industrial applications requiring high load capacity and reliable performance. Featuring a 90 mm bore, 225 mm outer diameter, and 54 mm width, this bearing accommodates substantial radial loads as well as bidirectional axial loads. Its open configuration allows for easy relubrication, making it ideal for high-speed operations, elevated temperatures, or environments where maintenance intervals require periodic lubrication. Manufactured from premium chrome steel, the 6418 ensures long service life under demanding conditions.
Details
The 6420 Open is a standard single-row deep groove ball bearing engineered for demanding industrial environments. With a 100 mm bore, 250 mm outer diameter, and 58 mm width, this open-type bearing delivers robust radial and axial load capacity. It is widely used in heavy electric motors, large pumps, compressors, and industrial gearboxes where reliable performance and long service life are essential. The open configuration allows for flexible lubrication methods, making it suitable for both oil bath and grease systems.
Details
The 6422 Open is a heavy-duty single-row deep groove ball bearing engineered for large-scale industrial equipment requiring high load capacity and reliable operation. With a 110 mm bore, 280 mm outer diameter, and 65 mm width, this open-type bearing delivers exceptional radial and axial load support. It is commonly specified for large electric motors, industrial pumps, compressors, and mining equipment where durability and performance under continuous operation are critical. The open configuration accommodates various lubrication methods including oil bath, circulating oil, or grease systems.
Details
The 6426-2RS is a heavy-duty single-row deep groove ball bearing engineered for demanding industrial applications requiring enhanced contamination protection. With a 130 mm bore, 340 mm outer diameter, and 78 mm width, this large-format bearing delivers substantial radial and axial load capacity. Featuring double rubber seals (2RS) on both sides, it provides effective protection against dust, moisture, and particulate contamination while retaining lubricant for extended maintenance intervals. This bearing is commonly specified for heavy electric motors, large pumps, compressors, mining equipment, and industrial gearboxes operating in challenging environments .
Details
The 6404 is a Single Row Deep Groove Ball Bearing designed for dependable performance in a wide spectrum of industrial and mechanical applications. Featuring a deep groove raceway geometry, this bearing efficiently accommodates radial loads as well as moderate axial loads in both directions. With a 20 mm bore, 72 mm outer diameter, and a 19 mm width, it provides a robust and versatile solution for various machinery. Available with different sealing options (open, metal shields, or rubber seals), it is ideal for electric motors, pumps, gearboxes, fans, and other equipment requiring smooth, low‑noise operation and long service life.
Details
The 6404-2RS is a Single Row Deep Groove Ball Bearing with Contact Rubber Seals engineered for reliable performance in demanding industrial environments. With a 20 mm bore, 72 mm outer diameter, and a 19 mm width, it provides a robust and versatile solution for various machinery applications. Featuring the standard deep groove raceway geometry, this bearing efficiently accommodates radial loads as well as moderate axial loads in both directions. Equipped with double rubber seals (2RS) for effective contamination protection and lubricant retention, it is ideally suited for electric motors, pumps, agricultural equipment, and industrial machinery operating in dusty or moist conditions where maintenance access is limited.
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