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HK121820 Needle Roller Bearing 12x18x20mm

HK121820 Needle Roller Bearing 12x18x20mm


Specifications
Inner Diameter (ID)
12
Outer Diameter (OD)
18
Width (W)
20
Overall Size (IDxODxW)
12x18x20
Dynamic Load Rating
kN
Static Load Rating
kN
Reference Speed
rpm
Limiting Speed
rpm
Cage Material
Non-Metallic
Seal Type
None On Both Sides
Clearance
CN
Precision
Grade 0
Operating Temperature
-40 °C to +120 °C
Mass
0.017 kg
Details

Needle roller bearings are a type of precision roller bearing characterized by long, thin cylindrical rollers resembling needles. Their distinctive design allows for a higher length-to-diameter ratio, enabling these bearings to handle high radial loads in compact spaces. Commonly used in automotive transmissions, industrial gearboxes, and various machinery requiring efficient radial load support, needle roller bearings offer advantages of lightweight construction, cost-effectiveness, and suitability for high-speed applications. The needle rollers, guided by the bearing's races, distribute loads evenly, providing excellent radial load-carrying capacity. Proper lubrication is essential for minimizing friction, ensuring durability, and extending service life. Needle roller bearings find application in diverse industries where space constraints and the need for efficient radial load handling are critical considerations. 


SPECIFICATIONS
 
 
Inner Diameter 12 mm Number of Rows Single Row
Outer Diameter 18 mm Cage Material Non-Metallic
Width 20 mm Seal Type None On Both Sides
Dynamic Load Rating  kN Clearance CN
Static Load Rating  kN Precision Grade 0
Fatigue Load Limit  kN Min Temperature -40 °C
Reference Speed  rpm Max Temperature +120 °C
Limiting Speed  rpm Size Standard Metric System
Rolling Element Roller Mass 0.017 kg


FEATURES AND BENEFITS


  • High load-carrying capacity.

  • Low friction and high-speed.

  • Support both radial and axial loads.

  • Well suited for applications with limited radial space.

 

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