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Heavy Duty Needle Roller Bearings (Machined) NK21/20-XL

Heavy Duty Needle Roller Bearings (Machined) NK21/20-XL

The NK21/20-XL is a heavy-duty needle roller bearing with a 21mm bore and 29mm outer diameter, crafted from sturdy steel for reliable performance. It handles radial loads up to 4342 lbf and spins smoothly at speeds up to 20600 RPM.
Its open design requires regular lubrication, while the press-fit shaft mount ensures a secure installation. The bearing operates well in temperatures ranging from -20°C to 110°C.
This model is interchangeable with INA bearings, making it a practical choice for replacements. Ideal for applications like transmissions or industrial equipment where high radial loads are common.
Weighing just 35.2g, it’s lightweight yet robust. Compliant with RoHS standards for safe use.

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    Description Features Application Q&A Featured Products Our Process

Product Parameters

  • Part Number NK21/20-XL
  • Brand TFL
  • Interchangeable brand INA
  • System of Measurement Metric
  • Bearing Type Roller
  • Roller Bearing Type Needle
  • For Load Direction Radial
  • Construction Single Row
  • Seal Type Open
  • Inner Ring No
  • Series Without Inner Ring
  • Bore Dia 21 mm
  • Bore Dia Tolerance 0.02mm to 0.033mm
  • Outer Dia 29 mm
  • Outer Dia Tolerance -0.009mm to 0
  • Width 20 mm
  • Width Tolerance -0.12mm to 0
  • Ring Material Steel
  • Cage Material Steel
  • Roller Material Steel
  • Dynamic Radial Load 4342 lbf
  • Static Radial Load 5738 lbf
  • Lubrication Required
  • Shaft Mount Type Press Fit
  • Temperature Range -20 to 110 °C
  • RoHS Compliant
  • Max Speed 20600 rpm
  • Weight 35.2 g
Heavy Duty Needle Roller Bearings (Machined) NK21/20-XL dimension drawing
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Features

How Does NK21/20-XL Bearing Handle Heavy Radial Loads?
NK21/20-XL Bearing is built with steel rings and rollers, offering strong resistance to heavy radial loads.
Its dynamic radial load capacity reaches 4342 lbf, ensuring reliable performance in demanding applications.
The steel cage maintains roller alignment, reducing wear and extending service life.
With a maximum speed of 20,600 rpm, it balances durability and efficiency.
NK21/20-XL Bearing operates effectively in temperatures from -20 to 110°C.
Its press-fit shaft mount design simplifies installation, saving time and effort.

Application

Industrial Uses of NK21/20-XL Bearing
NK21/20-XL Bearing is commonly used in industrial machinery, especially in applications where space is limited but high radial load capacity is needed, like conveyor systems. Its press-fit design ensures a secure mount, reducing the risk of slippage during operation.
Where Is NK21/20-XL Bearing Used?
In automotive applications, NK21/20-XL Bearing fits well in gearboxes and transmission systems, handling high speeds up to 20,600 rpm. The steel construction provides durability, making it reliable for long-term use.
Built for Heavy-Duty Use: NK21/20-XL Bearing
For automation equipment, NK21/20-XL Bearing works efficiently in robotic arms and assembly lines, thanks to its compact size and high load capacity. The open seal type allows for easy lubrication, maintaining smooth performance.
Automotive vs Industrial: Applications of NK21/20-XL Bearing
In automotive settings, NK21/20-XL Bearing supports clutch mechanisms, while in industrial gear, it excels in heavy-duty presses. Its metric sizing ensures compatibility with a wide range of machinery.
Perfect Fit for High-Speed Operations: NK21/20-XL Bearing
NK21/20-XL Bearing is ideal for applications requiring fast rotation, such as power tools and small engines. The steel rollers and cage provide stability, even under continuous use.

Q&A

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