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Super-Precision Axial-Radial Cylindrical Roller Bearings NRT 180 B

Super-Precision Axial-Radial Cylindrical Roller Bearings NRT 180 B

The NRT 180 B is a super-precision cylindrical roller bearing with a 180mm bore and 280mm outer diameter, designed for combined axial and radial loads. Made from durable chrome steel, it handles dynamic loads up to 89.7 kN radially and 80 kN axially.

Its brass cage ensures smooth operation, while the design allows for both grease and oil lubrication. It can reach speeds of 190 r/min with grease and 380 r/min with oil-air lubrication, making it versatile for various applications.

The bearing features precise axial stiffness and moment stiffness, ideal for high-precision machinery. It operates efficiently in temperatures from -30°C to 110°C and complies with RoHS and REACH standards.

Weighing 7.5kg, it’s suitable for heavy-duty applications like machine tools or industrial gearboxes where precision and reliability are key.

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Product Parameters

  • Part Number NRT 180 B
  • Size 180 mm x 280 mm x 43 mm
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • For Load Direction Combined
  • Bore Dia 180 mm
  • Bore Dia Tolerance -0.013mm to 0
  • Outer Dia 280 mm
  • Outer Dia Tolerance -0.018mm to 0
  • Width 43 mm
  • Height Tolerance -0.175mm to 0
  • Shoulder Diameter Inner Ring - Large Shoulder 244 mm
  • Outer Ring (Housing Washer) Width 15 mm
  • Distance 29 mm
  • Inner Ring (Shaft/Locating Washer) Hole Pitch Circle Diameter 194 mm
  • Outer Ring (Housing Washer) Hole Pitch Circle Diameter 260 mm
  • Inner Ring (Shaft/Locating Washer) Through Hole 7 mm
  • Inner Ring (Shaft Washer) Sinkhole 11 mm
  • Outer Ring (Housing Washer) Through Hole 7 mm
  • Inner Ring (Shaft Washer) Sinkhole Depth 6.2 mm
  • Outer Ring (Housing Washer) Chamfer Dimension r1 (min.) 0.6 mm
  • Chamfer Dimension r2 (min.) 0.3 mm
  • Basic Dynamic Load Rating - Radial Direction 89.7 kN
  • Basic Static Load Rating - Radial Direction 236 kN
  • Basic Dynamic Load Rating - Axial Direction 80 kN
  • Attainable Speed For Grease Lubrication 190 r/min
  • Attainable Speed For Oil-Air Lubrication 380 r/min
  • Axial Preload 2.6 kN
  • Axial Unloading Force 5.6 kN
  • Frictional Moment 13 N·m
  • Axial Stiffness For Preload A (sets of two brgs back-to-back or face-to-face) 10600000 kN/µm
  • Axial Stiffness For Preload B (sets of two brgs back-to-back or face-to-face) 5800000 kN/µm
  • Moment Stiffness 54 kN·m/mrad
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Cage Material Brass
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 7.5 kg

Features

Performance Features of NRT 180 B Bearing

NRT 180 B Bearing combines axial and radial load handling, making it versatile for complex applications.
Its chrome steel construction ensures durability and resistance to wear under heavy loads.

The bearing’s basic dynamic load rating of 89.7 kN (radial) and 80 kN (axial) guarantees reliable performance.
With grease lubrication, it achieves speeds up to 190 r/min, while oil-air lubrication allows 380 r/min.

NRT 180 B Bearing’s brass cage maintains roller alignment, reducing friction and extending service life.
Its axial stiffness ranges from 5,800,000 to 10,600,000 kN/µm, ensuring stability under varying loads.

Designed for temperatures between -30°C and 110°C, NRT 180 B Bearing performs well in diverse environments.
The preload and unloading forces are optimised for smooth operation and reduced maintenance needs.

Application

Industrial Uses of NRT 180 B Bearing
NRT 180 B Bearing is commonly used in heavy machinery like industrial presses and large gearboxes, where its combined load capacity handles both radial and axial forces efficiently. The brass cage ensures smooth operation even under high stress.

In wind turbines, NRT 180 B Bearing supports the main shaft, providing stability and reducing friction during rotation. Its grease lubrication option makes it suitable for remote or hard-to-access locations.

For machine tools, NRT 180 B Bearing’s precision design ensures accurate positioning and minimal vibration. The chrome steel construction offers durability in high-speed cutting applications.

Automotive vs Aerospace: Applications of NRT 180 B Bearing
In automotive testing rigs, NRT 180 B Bearing withstands rigorous performance checks, thanks to its high dynamic load rating. The metric sizing ensures compatibility with European engineering standards.

Aerospace applications benefit from NRT 180 B Bearing’s ability to handle axial and radial loads in landing gear systems. The oil-air lubrication option allows for higher speeds in critical flight components.

What Makes NRT 180 B Bearing a Preferred Choice?
NRT 180 B Bearing is often selected for robotics, where its low frictional moment enhances energy efficiency. The preload options provide flexibility in tuning for specific performance needs.

In medical imaging devices, NRT 180 B Bearing’s smooth operation ensures quiet and precise movement. The temperature range makes it reliable in various clinical environments.

Built for Heavy-Duty Use: NRT 180 B Bearing
NRT 180 B Bearing excels in construction equipment, such as cranes and excavators, where its static load rating supports heavy lifting. The robust design minimises wear over time.

For food processing machinery, NRT 180 B Bearing’s corrosion-resistant materials meet hygiene standards. The easy maintenance design reduces downtime in production lines.

Q&A

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