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Super-Precision Axial-Radial Cylindrical Roller Bearings NRT 260 B

Super-Precision Axial-Radial Cylindrical Roller Bearings NRT 260 B

The NRT 260 B is a super-precision cylindrical roller bearing, measuring 260mm by 385mm by 55mm, crafted from durable chrome steel. It handles both radial and axial loads, with dynamic ratings of 108 kN and 95 kN respectively.

Its brass cage ensures smooth operation, while the design supports speeds up to 260 r/min with oil-air lubrication. The bearing also features a high axial stiffness, making it stable under heavy loads.

With a temperature range of -30°C to 110°C, it suits demanding environments like industrial machinery or heavy equipment. Compliant with RoHS and REACH standards, it’s a reliable choice for precision applications.

Weighing 18.2kg, it’s robust yet manageable for its size, ideal for setups requiring combined load handling.

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Product Parameters

  • Part Number NRT 260 B
  • Size 260 mm x 385 mm x 55 mm
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • For Load Direction Combined
  • Bore Dia 260 mm
  • Bore Dia Tolerance -0.018mm to 0
  • Outer Dia 385 mm
  • Outer Dia Tolerance -0.02mm to 0
  • Width 55 mm
  • Height Tolerance -0.40mm to 0
  • Shoulder Diameter Inner Ring - Large Shoulder 345 mm
  • Outer Ring (Housing Washer) Width 18 mm
  • Distance 36.5 mm
  • Inner Ring (Shaft/Locating Washer) Hole Pitch Circle Diameter 280 mm
  • Outer Ring (Housing Washer) Hole Pitch Circle Diameter 365 mm
  • Inner Ring (Shaft/Locating Washer) Through Hole 9.3 mm
  • Inner Ring (Shaft Washer) Sinkhole 15 mm
  • Outer Ring (Housing Washer) Through Hole 9.3 mm
  • Inner Ring (Shaft Washer) Sinkhole Depth 8.2 mm
  • Outer Ring (Housing Washer) Chamfer Dimension r1 (min.) 0.6 mm
  • Chamfer Dimension r2 (min.) 0.6 mm
  • Basic Dynamic Load Rating - Radial Direction 108 kN
  • Basic Static Load Rating - Radial Direction 355 kN
  • Basic Dynamic Load Rating - Axial Direction 95 kN
  • Attainable Speed For Grease Lubrication 130 r/min
  • Attainable Speed For Oil-Air Lubrication 260 r/min
  • Axial Preload 7.3 kN
  • Axial Unloading Force 16 kN
  • Frictional Moment 25 N·m
  • Axial Stiffness For Preload A (sets of two brgs back-to-back or face-to-face) 14700000 kN/µm
  • Axial Stiffness For Preload B (sets of two brgs back-to-back or face-to-face) 8300000 kN/µm
  • Moment Stiffness 153 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 18.2 kg

Features

Performance Features of NRT 260 B Bearing

NRT 260 B Bearing combines axial and radial load handling with a robust chrome steel construction.

Its basic dynamic load ratings are 108 kN radially and 95 kN axially, ensuring reliable performance under combined loads.

The brass cage maintains roller alignment, reducing friction and wear during operation.

With grease or oil lubrication options, it operates smoothly within a -30° to 110°C temperature range.

How Is NRT 260 B Bearing Engineered for Reliability?

NRT 260 B Bearing features precise cylindrical rollers for optimal load distribution in both axial and radial directions.

The chrome steel rings and rollers provide durability, while the brass cage ensures stable roller movement.

It offers axial stiffness up to 14,700,000 kN/µm when preloaded, maintaining precision under heavy loads.

Designed for industrial applications, it balances high load capacity with smooth rotation.

Built for Reliability: NRT 260 B Bearing

NRT 260 B Bearing withstands demanding conditions with its high load ratings and temperature tolerance.

The bearing’s axial preload capability of 7.3 kN ensures stable operation in precision applications.

Its brass cage design reduces friction, contributing to longer service life and consistent performance.

With attainable speeds of 130 r/min (grease) or 260 r/min (oil-air), it adapts to various lubrication needs.

Steel vs Ceramic Bearings: Strengths of NRT 260 B Bearing

NRT 260 B Bearing utilises chrome steel for its rings and rollers, offering proven strength and durability.

This material choice provides excellent load-bearing capacity while maintaining cost-effectiveness.

The bearing’s brass cage complements the steel components, ensuring smooth operation under combined loads.

Its 355 kN static radial load rating demonstrates reliable performance in stationary applications.

Application

Common Applications of NRT 260 B Bearing
NRT 260 B Bearing is widely used in industrial machinery, especially in heavy-duty applications like large machine tools and rolling mills. Its combined load capacity makes it suitable for handling both radial and axial forces efficiently.

In the automotive sector, NRT 260 B Bearing can be found in high-performance gearboxes and drivetrains, where its precision and durability are essential. The brass cage ensures smooth operation even under demanding conditions.

For automation and robotics, NRT 260 B Bearing provides reliable performance in robotic arms and automated assembly lines. Its high stiffness and load ratings make it ideal for precise movements and heavy loads.

In medical imaging equipment, NRT 260 B Bearing’s chrome steel construction ensures long-lasting performance. The grease lubrication option helps maintain smooth operation in sensitive environments.

NRT 260 B Bearing is also a good fit for wind turbines, where its ability to handle combined loads and high stiffness is crucial. The oil-air lubrication option allows for higher speeds in such applications.

Q&A

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