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NA6909 Needle Roller Bearing 45x68x40mm

NA6909 Needle Roller Bearing 45x68x40mm


Specifications
Inner Diameter (ID)
45
Outer Diameter (OD)
68
Width (W)
40
Overall Size (IDxODxW)
45x68x40
Dynamic Load Rating
70.4 kN
Static Load Rating
137.0 kN
Reference Speed
7 500 rpm
Limiting Speed
8 500 rpm
Cage Material
Non-Metallic
Seal Type
None On Both Sides
Clearance
CN
Precision
Grade 0
Operating Temperature
-40 °C to +120 °C
Mass
0.5 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 45 mm Number of Rows Single Row
Outer Diameter 68 mm Cage Material Non-Metallic
Width 40 mm Seal Type None On Both Sides
Dynamic Load Rating 70.4 kN Clearance CN
Static Load Rating 137.0 kN Precision Grade 0
Fatigue Load Limit 17.0 kN Min Temperature -40 °C
Reference Speed 7 500 rpm Max Temperature +120 °C
Limiting Speed 8 500 rpm Size Standard Metric System
Rolling Element Roller Mass 0.5 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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