Tel: 860-571-3602  |
Tel: 860-571-3602  |

Precision Miniature Balls


Precision miniature balls are balls under 1/8 inch (3 mm) in diameter. They are generally made out of stainless steel or chrome, making them hard and tough. They are used in applications where a high degree of precision is required such as the medical, automotive or electronics industry. Hartford Technologies provides billions of these precision balls to numerous industries such as automotive, medical, dental, electronics, health and beauty, and other applications where small ultra-precise balls are needed.


Hartford offers miniature bearing balls from materials including chrome (52100) and stainless steel 440C, 300 series, 302, 304, 316.

Ball Sizes

Miniature precision balls range in size from 1mm to 3mm, and from grades 10 to 50.  Grade 10 balls have a sphericity of only 10 millionths (0.00001”) of an inch and are the highest precision balls that we manufacture. 

Tell us your requirements for miniature precision balls and let us provide a solution.  Hartford Technologies design engineers are among the most knowledgeable in the industry, and our ability to manufacture on both sides of the globe gives Hartford customers a substantial advantage in cost and flexibility. We produce more than one billion balls per year for high volume OEM applications and can provide fast turn-around to meet stringent delivery requirements.

Request a consultation today for quick, expert applications assistance with your next miniature ball requirement.

Hartford Technologies is ISO 9001, IATF 16949, ISO 14001 and WBENC (woman-owned) certified.



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