Miniature Bearing

BMZ Bearings has a huge selection of Miniature Bearings and Instrument Series Ball Bearings with over 500 types available 

Precision tolerances from ABEC-1 through ABEC-5 are generally available for most miniature products. Typical bore sizes of 

miniature ball bearings start at 3 mm with an outside diameter a mere 10 mm. Custom-made miniature bearings can have 

bore sizes as small as 1.5 mm! 

Many products are available in common 420 and 440 type Stainless Steel, 52100 Chrome Steel materials in both inch and 

metric dimensions.

Other major configurations from BMZ include:

• Open miniature ball bearings

• Open, with extended inner ring miniature ball bearings

• Shielded miniature ball bearings

• Shielded, with extended inner ring miniature ball bearings

• Sealed miniature ball bearings

• Sealed, with extended inner ring miniature ball bearings