How small is small? Featuring the World’s Smallest Ball Bearing – by Minebea

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Featuring the World’s Smallest Ball Bearing – by Minebea

Minebea Co., Ltd., NMB’s  parent company, produces the world’s smallest ball bearing.

Bearing on a Rice Grain
Bearing size compared to a rice grain

How small is small? With an outside diameter of 1.50mm, inside diameter of 0.50mm, width of 0.65mm, and capable of high speed rotation of more than 5,000 rpm, this new ultra small ball bearing is definitely tiny.

Manufactured in stainless steel, the new ultra small ball bearings have the same high precision, durability and rigidity structure as all the other miniature ball bearings that Minebea manufactures. The width of 0.65mm can be slimmed down to 0.4mm for low speed. This ultra small ball bearing contains 6 balls with a diameter of 0.25mm.

Bearing size compared to a Mechanical Pencil
Bearing size compared to a Mechanical Pencil

Applications for this new product will be in ultra small devices that require extreme precision on a nano scale, such as miniaturized medical devices, micro-motors, micro machines and others.

With a 60% share of the global market, Minebea is the leading manufacturer of miniature ball bearings with outer diameter of less than 22mm. To this distinction we now add: the largest manufacturer of the world’s smallest ball bearing.

About NMB  – NMB, a Minebea Group Company, is the world’s largest manufacturer of miniature precision ball bearings and a volume leader in the design and manufacturing of precision electro-mechanical components, including cooling fans, precision small motors and mechanical bearing assemblies, among others.

NMB products can be found in the personal computing, networking, telecommunications, home entertainment, home electronics, automotive, medical and industrial markets.

For more information:

Corporate Americas Headquarter
NMB Technologies Corporation
A Minebea Group Company
9730 Independence Avenue
Chatsworth, CA 91311
Tel: 818-341-3355

Corporate European Headquarter
Siemensstrasse 30
63225 Langen
Call us at: +49 (0) 6103-913-0
Email us at: