Request a Quote for Ball Bearings
Please submit your inquiry below for detailed product and pricing information. We will get back to you within 24 hours.
Submit
64 Series
Home Deep Groove Ball Bearings 64 Series

6404 Deep Groove Ball Bearing For Electric Motors & Industrial Machinery | 20×72×19 mm

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.

6404 Deep Groove Ball Bearing For Electric Motors & Industrial Machinery | 20×72×19 mm

Comprehensive Applications

Ideal for a broad range of industrial equipment and mechanical drives:

Gearboxes & Transmissions
  • Industrial Gearbox Input/Output Shafts
  • Transmission Housings
  • Differential Mechanisms (light‑duty)
  • Speed Reducer Bearings
Machine Tools & General Industrial
  • Light‑Duty Spindle Supports
  • Printing Press Rollers
  • Packaging Machine Feed Mechanisms
  • Textile Machinery Spindles
Electric Motors & Drives
  • AC and DC Electric Motor Shafts
  • Servo and Stepper Motor Supports
  • Pump Motor Bearings
  • Cooling Fan Motors
Pumps & Compressors
  • Centrifugal Pump Impeller Supports
  • Hydraulic Pump Rotors
  • Vacuum Pump Bearings
  • Air Compressor Crankshafts

Key Performance Features

01. High Load Capacity

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.

02. Versatile Configuration

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.

03. Durable Construction

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.

Technical Specifications

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

Interchange Part Numbers

Common manufacturer equivalents include:

  • SKF: 6404, 6404-2Z, 6404-2RS1
  • NSK: 6404, 6404ZZ, 6404DDU
  • FAG: 6404, 6404.2ZR, 6404.2RSR
  • NTN: 6404, 6404LLB, 6404LLU
  • Generic: 6404, 6404ZZ, 6404-2RS

Design & Configuration

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."

Request a Quote for Ball Bearings
Please submit your inquiry below for detailed product and pricing information. We will get back to you within 24 hours.

Related Products

6416 Open Deep Groove Ball Bearing 80x200x48 mm High Radial Load Capacity for Industrial Electric Motors and Heavy Machinery
6416 Open Type Deep Groove Ball Bearing Heavy-Duty Industrial Grade | 80×200×48 mm

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
6417 Open Deep Groove Ball Bearing 85x210x52 mm Heavy Duty Chrome Steel Construction for Large Electric Motors Industrial Gearboxes and Pumps
6417 Deep Groove Ball Bearing Heavy-Duty Industrial Series For Durable Performance | 85×210×52 mm

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
6418 Open Deep Groove Ball Bearing showing heavy-duty chrome steel construction for high radial load capacity in industrial machinery Replacement Bearing compatible with SKF 6418, FAG 6418, and NSK 6418 for Electric Motors and Gearboxes High Load 186 kN 6
6418 Deep Groove Ball Bearing Heavy Duty Design for Industrial Motors and Pumps | 90×225×54 mm

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
6420 Open Bearing 100x250x58 mm for Heavy Electric Motors and Industrial Pumps - Open Configuration for Oil Bath Lubrication 206 kN Dynamic Load Rating - Direct Replacement for SKF 6420, NSK 6420, and FAG 6420 in Mining and Conveyor Systems Large Diameter
6420 Open Deep Groove Ball Bearing For Heavy-Duty Industrial Applications | 100×250×58 mm

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
Large Diameter 110mm Bore 6422 Open Bearing 110x280x65 mm for Heavy Industrial Motors and Compressors - 247 kN Dynamic Load Rating GCr15 Chrome Steel
6422 Open Deep Groove Ball Bearing For Heavy Industrial Machinery | 110×280×65 mm

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
Large Diameter 130mm Bore 6426-2RS Double Sealed Bearing 130x340x78 mm for Heavy Industrial Motors and Mining Equipment - 180 kN Dynamic Load Rating with Contact Rubber Seals
6426-2RS Double Sealed Deep Groove Ball Bearing For Heavy Industrial Equipment | 130×340×78 mm

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
6404 Deep Groove Ball Bearing Open Type - 20x72x19 mm GCr15 Steel for Electric Motors and Industrial Gearboxes High Load Capacity 30.7 kN 6404 Bearing - Chrome Steel P6 Precision Replacement for SKF 6404 and NSK 6404
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.

Details
6404-2RS Replacement Bearing compatible with SKF 6404-2RS1, NSK 6404DDU, NTN 6404LLU, and FAG 6404-2RSR
6404-2RS Deep Groove Ball Bearing For Industrial Applications | 20×72×19 mm

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.

Details

Request a Quote for Ball Bearings

Request a Quote for Ball Bearings
Please submit your inquiry below for detailed product and pricing information. We will get back to you within 24 hours.
Submit

Home

Products

whatsApp

contact