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ISO 9001:2000 Certified Quality Management System

More About PKB Aerospace Bearings for Cryogenic Applications

Cryogenic Aerospace Bearing Design

Stainless steel (440C) high precision ball bearings for use in the extreme temperature ranges of space applications are available in standard inch sizes and various metric sizes. A variety of special features, including, but not limited to, special heat treat options, retainer materials, lubricants, flanges, modified dimensions, and other unique features are offered to ensure a proper fit in the upper level assembly.

For highly challenging bearing applications, bearing noise, vibration, and life are all important factors which are heavily affected by both the design of high precision bearings and the intricate details of the bearing production process.

Optional retainer materials and specialty ball materials, coatings, and shield or seal designs are available to meet the specific requirements of your application. Please visit our fully searchable, online catalog of miniature and instrument bearings or specify a new bearing design for our factory to produce specifically to your unique requirements. Many special features are not listed in the website, so please be sure to contact us directly for assistance with unique retainer solutions, bearing closures, lubricants, or other special features.

Ultra High Precision Bearings Designed for Extreme Environments

PACAMOR KUBAR BEARINGS (PKB) manufactures ultra high precision bearings, designed specifically for the challenging environments of space, vacuum, speed, and temperature extremes, at our quality certified factory in Troy, NY. Pacamor Kubar Bearings (PKB) bearings for extreme environments offer long life and reliable performance. All PKB bearings for challenging applications are manufactured from 440C stainless steel, the preferred choice for all our miniature and instrument bearings. Its corrosion resistance allows for certain heat treat options to satisfy various temperature extremes. Its highly finished, honed surface provides a long lasting structure for the 440C or Silicon Nitride (ceramic) balls, which allows the bearing to rotate smoothly at fast or slow speeds and for long periods of time. Oils, greases, and coatings designed for temperature extremes, play a key role in the performance of any ball bearing used in a challenging environment.

For high or low temperature applications, bearing noise, vibration, and life are all important factors which are heavily affected by both the bearing design and the intricate details of the bearing production process. To meet the unique challenges encountered by bearings used in flow control and flow meters that work in extreme environments, the PKB engineering team designates special design features for maximum performance.

Retainer options include, but are not limited to, popular crown, ribbon, PGM, or heat and moisture resistant Phenolic and Torlon (polyamide-imide) retainers. A variety of bearing closures include glass-reinforced Teflon seals, Buna N rubber seals, metal shields with wires, and many other options, customized for your application.


If you don't find what you are seeking, please contact us and we'll be happy to help you. For further assistance with bearing selection and design, please feel free to contact our engineering team or look at our online catalog right now!

From medical tools to advanced space applications and everything in between, you can be confident of PACAMOR KUBAR BEARINGS precision miniature and instrument ball bearings.

Domestic Manufacturing

PACAMOR KUBAR BEARINGS ISO 9001:2008, AS9100:2009 and FAA TSO-C149, Aircraft Bearings Certified manufacturing facility, located in Troy, New York, is proudly an American owned and operated company. PACAMOR KUBAR BEARINGS is able to meet all DFARS domestic manufacturing requirements for applications relating to military and defense contracts. From the steel used to manufacture the bearing rings, to the many choices of retainer materials, balls, and bearing closures, our vendors must meet our unrelenting demand for reliable high quality in every miniature and instrument ball bearing that carries the PACAMOR KUBAR BEARINGS name. You can be certain, whether our precision instrument bearing is a single component in an oil well drilling device or the miniature bearing in your fishing reel, the PACAMOR KUBAR BEARINGS name is one you can trust.

Ball Bearing Lubrication

Miniature and instrument ball bearings are supplied ready for use, complete with your choice of lubricant, including food-safe and moisture-resistant grease. Optional shields prevent the introduction of contamination during operation while permitting the bearing to be re-lubricated during machine maintenance.

Custom Products

PACAMOR KUBAR BEARINGS has options to satisfy any miniature and instrument ball bearing requirement. Technical expertise is available to assist with design engineering for custom products. Available options include, but are not limited to, custom rings, retainers, shields, lubricants, and packaging. PACAMOR KUBAR BEARINGS offers the right bearing at the right price for all your precision miniature and instrument applications.