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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Miniature Ball Bearings Open Type 3D
Miniature Ball Bearings Open Type Diagram
Unit of Measure
Items Miniature Ball Bearings Open Type 3D
681 		Miniature Ball Bearings Open Type 3D
MR31 		Miniature Ball Bearings Open Type 3D
691 		Miniature Ball Bearings Open Type 3D
MR41X 		Miniature Ball Bearings Open Type 3D
681X
Type N/A Open Type
Bore Diameter N/A 1 mm N/A 1 mm N/A 1 mm N/A 1.2 mm N/A 1.5 mm
Outside Diameter N/A 3 mm N/A 3 mm N/A 4 mm N/A 4 mm N/A 4 mm
Overall Bearing Width N/A 1 mm N/A 1.5 mm N/A 1.6 mm N/A 1.8 mm N/A 1.2 mm
Dimension B1 N/A N/A N/A N/A 2.5 mm N/A 2 mm
Dimension r N/A 0.05 mm N/A 0.05 mm N/A 0.1 mm N/A 0.1 mm N/A 0.05 mm
Dimension r1 N/A N/A N/A N/A 0.1 mm N/A 0.05 mm
Dynamic (Cr) Basic Load Rating N/A 0.08 kN N/A 0.08 kN N/A 0.112 kN N/A 0.138 kN N/A 0.112 kN
Static (Cor) Basic Load Rating N/A 0.023 kN N/A 0.023 kN N/A 0.033 kN N/A 0.035 kN N/A 0.033 kN
Approximate Mass N/A 0.03 kg N/A 0.04 kg N/A 0.09 kg N/A 0.1 kg N/A 0.07 kg