WD Bearing Group
WD Bearings America LLC
5845 W 82nd Street, Suite 102,
Indianapolis, IN 46278.
Tel: +1 317 661 3293
Email: Contact@wd-bearing.com
WD Waelzlager GmBH
Ost Strasse 74A 40724,
Hilden, Germany
Tel: +49 2103 968 6352
Email: Contact@wd-bearing.com
WD Bearing Group
No. 100, Zhenyang Road,
Jiangyin, Wuxi, P.R China, 214401
Tel: 0510-8655 7067
Fax: 0510-8655 7065
Email: Contact@wd-bearing.com
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Heavy-Duty-Needle-Roller-Bearings-With-Inner-Ring---NA-Series---3D
Unit of Measure
1 2 3 4 

Item #

Bore Diameter

Outside Diameter

Dimension C

Dynamic (Cr) Basic Load Rating

CAD

NKI8 N/A 8 mm N/A 25 mm N/A 16 mm N/A 12400 N N/A
NKI9/12 N/A 9 mm N/A 19 mm N/A 12 mm N/A 6200 N N/A
NA4900 N/A 10 mm N/A 22 mm N/A 13 mm N/A 9600 N N/A
NKI10/16 N/A 10 mm N/A 22 mm N/A 16 mm N/A 9800 N N/A
NA4901 N/A 12 mm N/A 24 mm N/A 13 mm N/A 10600 N N/A
NA6901 N/A 12 mm N/A 24 mm N/A 22 mm N/A 18100 N N/A
NKI12/20 N/A 12 mm N/A 24 mm N/A 20 mm N/A 14000 N N/A
NKIS12 N/A 12 mm N/A 30 mm N/A 16 mm N/A 16000 N N/A
NA4902 N/A 15 mm N/A 28 mm N/A 13 mm N/A 12000 N N/A
NA6902 N/A 15 mm N/A 28 mm N/A 23 mm N/A 19500 N N/A
NKI15/16 N/A 15 mm N/A 27 mm N/A 16 mm N/A 8800 N N/A
NKI15/20 N/A 15 mm N/A 27 mm N/A 20 mm N/A 12300 N N/A
NKIS15 N/A 15 mm N/A 35 mm N/A 20 mm N/A 23500 N N/A
NA4903 N/A 17 mm N/A 30 mm N/A 13 mm N/A 12400 N N/A
NA6903 N/A 17 mm N/A 30 mm N/A 23 mm N/A 21100 N N/A
NKI17/16 N/A 17 mm N/A 29 mm N/A 16 mm N/A 13000 N N/A
NA4904 N/A 20 mm N/A 37 mm N/A 17 mm N/A 23700 N N/A
NA6904 N/A 20 mm N/A 37 mm N/A 30 mm N/A 40500 N N/A
NKI20/16 N/A 20 mm N/A 32 mm N/A 16 mm N/A 10800 N N/A
NKIS20 N/A 20 mm N/A 42 mm N/A 20 mm N/A 16500 N N/A
NA49/22 N/A 22 mm N/A 39 mm N/A 17 mm N/A 26000 N N/A
NA69/22 N/A 22 mm N/A 39 mm N/A 30 mm N/A 42000 N N/A
NKI22/16 N/A 22 mm N/A 34 mm N/A 16 mm N/A 15300 N N/A
NA4905 N/A 25 mm N/A 42 mm N/A 17 mm N/A 26500 N N/A
NA6905 N/A 25 mm N/A 42 mm N/A 30 mm N/A 44000 N N/A
Unit of Measure
1 2 3 4