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NA6903 Needle Roller Bearing 17x30x23mm

NA6903 Needle Roller Bearing 17x30x23mm


Specifications
Inner Diameter (ID)
17
Outer Diameter (OD)
30
Width (W)
23
Overall Size (IDxODxW)
17x30x23
Dynamic Load Rating
18.7 kN
Static Load Rating
30.5 kN
Reference Speed
18 000 rpm
Limiting Speed
20 000 rpm
Cage Material
Non-Metallic
Seal Type
None On Both Sides
Clearance
CN
Precision
Grade 0
Operating Temperature
-40 °C to +120 °C
Mass
0.072 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 17 mm Number of Rows Single Row
Outer Diameter 30 mm Cage Material Non-Metallic
Width 23 mm Seal Type None On Both Sides
Dynamic Load Rating 18.7 kN Clearance CN
Static Load Rating 30.5 kN Precision Grade 0
Fatigue Load Limit 3.75 kN Min Temperature -40 °C
Reference Speed 18 000 rpm Max Temperature +120 °C
Limiting Speed 20 000 rpm Size Standard Metric System
Rolling Element Roller Mass 0.072 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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