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-Without-Inner-Ring---NK50-Series---3D
Unit of Measure
1 2 3 4 

Item #

Outside Diameter

Dimension C

Dynamic (Cr) Basic Load Rating

CAD

NK40/30 N/A 50 mm N/A 30 mm N/A 37500 N N/A
RNA69/32 N/A 52 mm N/A 36 mm N/A 25500 N N/A
NK42/20 N/A 52 mm N/A 20 mm N/A 23900 N N/A
NK42/30 N/A 52 mm N/A 30 mm N/A 27000 N N/A
RNA4907 N/A 55 mm N/A 20 mm N/A 19800 N N/A
RNA6907 N/A 55 mm N/A 36 mm N/A 26000 N N/A
NK43/20 N/A 53 mm N/A 20 mm N/A 25700 N N/A
NK43/30 N/A 53 mm N/A 30 mm N/A 39000 N N/A
NK45/20 N/A 55 mm N/A 20 mm N/A 19800 N N/A
RNA4908 N/A 62 mm N/A 22 mm N/A 31000 N N/A
RNA6908 N/A 62 mm N/A 40 mm N/A 64000 N N/A
NK50/25 N/A 62 mm N/A 25 mm N/A 28000 N N/A
NK50/35 N/A 62 mm N/A 35 mm N/A 32000 N N/A
RNA4909 N/A 68 mm N/A 22 mm N/A 37000 N N/A
RNA6909 N/A 68 mm N/A 40 mm N/A 61500 N N/A
NK55/25 N/A 68 mm N/A 25 mm N/A 30600 N N/A
RNA4910 N/A 72 mm N/A 22 mm N/A 41000 N N/A
RNA6910 N/A 72 mm N/A 40 mm N/A 68000 N N/A
NK60/25 N/A 72 mm N/A 25 mm N/A 39000 N N/A
RNA4911 N/A 80 mm N/A 25 mm N/A 50600 N N/A
RNA6911 N/A 80 mm N/A 45 mm N/A 82560 N N/A
RNA4912 N/A 85 mm N/A 25 mm N/A 52800 N N/A
RNA6912 N/A 85 mm N/A 45 mm N/A 88500 N N/A
RNA4913 N/A 90 mm N/A 25 mm N/A 57500 N N/A
RNA6913 N/A 90 mm N/A 45 mm N/A 87600 N N/A
Unit of Measure
1 2 3 4