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Single Row Cylindrical Roller Bearings With Inner Ring NJ 321 ECJ
Single Row Cylindrical Roller Bearings With Inner Ring NJ 321 ECJ

Single Row Cylindrical Roller Bearings With Inner Ring NJ 321 ECJ

The NJ 321 ECJ is a single-row cylindrical roller bearing with a 105mm bore and 225mm outer diameter, crafted from durable chrome steel. It handles combined loads up to 112500 lbf and operates smoothly at speeds up to 4000 RPM.

Its open design allows for easy lubrication with grease or oil, while the steel cage ensures stable performance. The bearing works well in temperatures ranging from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a reliable choice for replacements. Ideal for heavy-duty applications like industrial machinery or gearboxes where radial and axial loads are present.

Weighing 8.73kg, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NJ 321 ECJ
  • Brand TFL
  • Interchangeable SKF
  • Bore Dia 105 mm
  • Bore Dia Tolerance -0.02mm to 0
  • Outer Dia 225 mm
  • Outer Dia Tolerance -0.03mm to 0
  • Width 49 mm
  • Width Tolerance -0.20mm to 0
  • Shoulder Dia Of Inner Ring 145 mm
  • Chamfer Dimension r1,2(min.) 3 mm
  • Chamfer Dimension r3,4(min.) 3 mm
  • Permissible Axial Displacement(max.) 3.4 mm
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • For Load Direction Combined
  • Construction Single Row
  • Inner Ring Type With Inner Ring
  • Seal Type Open
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Steel cage, roller centred
  • Dynamic Radial Load 112500 lbf
  • Static Radial Load 112500 lbf
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Max Speed 4000 rpm
  • Weight 8.73 kg
  • Shoulder Dia Of Outer Ring 189 mm
  • Raceway Diameter Of Inner Ring 133 mm

Features

Performance Features of NJ 321 ECJ Bearing

NJ 321 ECJ Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 112500 lbf, ensuring reliable performance in heavy-duty applications.

The steel cage keeps the rollers centred, reducing friction and extending operational life.
With a maximum speed of 4000 rpm, it balances durability and efficiency in demanding conditions.

NJ 321 ECJ Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, reducing maintenance needs.

The precise chamfer dimensions of 3 mm ensure easy installation and alignment.
This makes NJ 321 ECJ Bearing a practical choice for industrial applications.

Application

Industrial Uses of NJ 321 ECJ Bearing
NJ 321 ECJ Bearing is commonly used in heavy machinery like industrial gearboxes and large pumps, where its cylindrical roller design handles both radial and axial loads efficiently. The chrome steel construction ensures durability in demanding environments.

In automotive applications, NJ 321 ECJ Bearing supports components such as transmission systems and differentials, providing reliable performance under high-speed conditions. Its metric sizing makes it a versatile choice for various vehicle models.

For automation systems, NJ 321 ECJ Bearing is ideal for robotic arms and conveyor belts, thanks to its high load capacity and smooth operation. The open design allows for easy lubrication, extending its service life in continuous-use scenarios.

What Makes NJ 321 ECJ Bearing a Preferred Choice?
NJ 321 ECJ Bearing stands out in wind turbine applications, where its ability to handle combined loads ensures stable performance. The steel cage design enhances its reliability in high-speed rotations.

In construction equipment, NJ 321 ECJ Bearing is often found in crane mechanisms and excavators, where its robust build withstands heavy loads. The wide temperature range makes it suitable for outdoor use in varying climates.

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