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Super-Precision Axial-Radial Cylindrical Roller Bearings NRT 120 B

Super-Precision Axial-Radial Cylindrical Roller Bearings NRT 120 B

The NRT 120 B is a super-precision cylindrical roller bearing, measuring 120mm by 210mm by 40mm, crafted from durable chrome steel. It handles combined loads with a radial capacity of 64.4 kN and axial capacity of 72 kN.

Its brass cage ensures smooth operation, while the design supports speeds up to 460 r/min with oil-air lubrication. The bearing maintains performance in temperatures from -30°C to 110°C.

The bearing features precise axial stiffness, making it suitable for high-accuracy applications. Its robust construction is ideal for heavy-duty machinery like industrial gearboxes or precision tools.

Weighing 4.8kg, it’s built for reliability and complies with RoHS and REACH standards. Easy to maintain with grease or oil lubrication, it’s a practical choice for demanding environments.

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Product Parameters

  • Part Number NRT 120 B
  • Size 120 mm x 210 mm x 40 mm
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • For Load Direction Combined
  • Bore Dia 120 mm
  • Bore Dia Tolerance -0.010mm to 0
  • Outer Dia 210 mm
  • Outer Dia Tolerance -0.015mm to 0
  • Width 40 mm
  • Height Tolerance -0.175mm to 0
  • Shoulder Diameter Inner Ring - Large Shoulder 184 mm
  • Outer Ring (Housing Washer) Width 12 mm
  • Distance 26 mm
  • Inner Ring (Shaft/Locating Washer) Hole Pitch Circle Diameter 135 mm
  • Outer Ring (Housing Washer) Hole Pitch Circle Diameter 195 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 64.4 kN
  • Basic Static Load Rating - Radial Direction 140 kN
  • Basic Dynamic Load Rating - Axial Direction 72 kN
  • Attainable Speed For Grease Lubrication 230 r/min
  • Attainable Speed For Oil-Air Lubrication 460 r/min
  • Axial Preload 2 kN
  • Axial Unloading Force 4.4 kN
  • Frictional Moment 6 N·m
  • Axial Stiffness For Preload A (sets of two brgs back-to-back or face-to-face) 8500000 kN/µm
  • Axial Stiffness For Preload B (sets of two brgs back-to-back or face-to-face) 4500000 kN/µm
  • Moment Stiffness 23 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 4.8 kg

Features

Performance Features of NRT 120 B Bearing

NRT 120 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 brass cage maintains roller alignment, enhancing smooth operation and longevity.

How Is NRT 120 B Bearing Engineered for Reliability?

NRT 120 B Bearing features precise tolerances, with a bore diameter of 120 mm and outer diameter of 210 mm.
Its dynamic load rating of 64.4 kN radially and 72 kN axially ensures reliable performance.
The bearing operates efficiently with both grease and oil-air lubrication, up to 460 r/min.

Built for Reliability: NRT 120 B Bearing

NRT 120 B Bearing’s axial stiffness reaches 8,500,000 kN/µm, providing stability under preload.
Its moment stiffness of 23 kN·m/mrad ensures precise performance in demanding conditions.
The temperature range of -30° to 110°C allows operation in varied environments.

Steel vs Ceramic Bearings: Strengths of NRT 120 B Bearing

NRT 120 B Bearing’s chrome steel rollers and rings offer superior strength and wear resistance.
The brass cage reduces friction and noise, making it ideal for precision applications.
With a static load rating of 140 kN radially, it handles heavy loads effortlessly.

What Makes NRT 120 B Bearing Suitable for High-Temperature Applications?

NRT 120 B Bearing performs reliably in temperatures ranging from -30° to 110°C.
Its chrome steel material maintains integrity and performance under thermal stress.
The bearing’s design ensures consistent operation even in challenging environments.

Application

Key Fields for NRT 120 B Bearing
NRT 120 B Bearing is commonly used in machine tools, where its combined load capacity handles both radial and axial forces efficiently. The chrome steel construction ensures durability in high-precision environments.

In wind turbines, NRT 120 B Bearing supports rotor shafts, providing stability under varying loads. Its brass cage reduces friction, enhancing performance in demanding conditions.

For robotics, NRT 120 B Bearing’s high stiffness and preload options make it suitable for precise motion control. The metric dimensions ensure compatibility with European automation systems.

How Does NRT 120 B Bearing Improve Performance?
NRT 120 B Bearing enhances gearbox efficiency by managing combined loads with minimal friction. The grease lubrication option simplifies maintenance in industrial settings.

In medical imaging devices, NRT 120 B Bearing’s precision reduces vibration, ensuring clear scans. Its temperature range suits both sterile and high-use environments.

Built for Heavy-Duty Use: NRT 120 B Bearing
NRT 120 B Bearing excels in steel mills, where its axial stiffness withstands intense rolling pressures. The oil-air lubrication option allows for higher speeds in continuous operations.

For printing presses, NRT 120 B Bearing’s moment stiffness ensures accurate paper alignment. The brass cage resists wear, even with frequent starts and stops.

Automotive vs Aerospace: Applications of NRT 120 B Bearing
In automotive testing rigs, NRT 120 B Bearing handles dynamic loads during endurance trials. Its preload adjustments suit varying test conditions.

For aircraft landing gear, NRT 120 B Bearing’s radial load capacity supports smooth retraction. The chrome steel rollers resist corrosion in harsh weather.

Q&A

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