3BG Supply Co. carries an extensive selection of miniature precision ball bearings, including mini ball bearings, micro ball bearings, and high precision ball bearings engineered for tight tolerances and smooth, low-friction rotation in compact assemblies. These small ball bearings are commonly used in instrumentation, robotics, medical devices, and other applications where space is limited but precision cannot be compromised. We also stock precision angular contact ball bearings for applications that combine high speed with combined radial and axial loads. Browse our full ball bearing catalog or contact our team to find the right precision ball bearing supplier for your project.
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Find the right Miniature Precision Ball Bearings for your needs.
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FAQs
What are miniature precision ball bearings used for?
Miniature precision ball bearings are used in compact, lightweight assemblies that still require smooth, low-friction rotation, such as small motors, instrumentation, medical devices, robotics, and precision optical equipment. Their small size and tight tolerances make them ideal where standard-size bearings would not fit.
What are ball bearing precision classes?
Ball bearing precision classes (such as ABEC or ISO tolerance grades) define how tightly a bearing's dimensions, roundness, and runout are controlled during manufacturing. Higher precision classes offer tighter tolerances, which generally improve rotational accuracy and allow for higher operating speeds, though they typically come at a higher cost.
What is the smallest ball bearing size available?
Miniature and micro ball bearings can have bore diameters of just a few millimeters or less, making them some of the smallest standardized bearings produced. Exact minimum sizes vary by manufacturer and series, so it is best to check specific product listings or speak with our team for the smallest options in stock.
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