Schatz Bearing Corporation has uploaded four new videos about thin section ball bearings to its YouTube channel. The videos are also available on the U.S. bearing manufacturer’s Thin Section Bearings page, which contains sections about product categories, specifications, applications, frequently

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After the results are documented, both the physical and functional characteristics of the part are verified against drawings, purchase orders, specifications, and other design documents. The first article inspection report (FAIR) includes the actual physical characteristics that were measured along with any non-conformities. Schatz is also ISO 9001:2015 certified, but our AS9100D certification means that we’re a manufacturer of aircraft bearings with the FAI and FAIR capabilities that you need.

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If the bearing will not be exposed to a polluted environment, you can consider choosing an open bearing. If the bearing needs to be kept clean and well lubricated, you can choose a sealed bearing. To support various load conditions, Kaydon Reali Slim bearings are available in three basic types, radial contact (Type C), angular contact (Type A) and four-point contact (Type KC, etc.) Kaydon Reali Slim bearings are available with a variety of cage options to evenly space rolling elements and prevent contact between them. Available cage types include continuous ring “sleeve cages”, continuous ring circular cages, Molded cage, ring cage, PTFE cage, etc.

Within a series of thin section bearings, the size of the cross-section remains the same even when the bore size increases. This makes thin section bearings a good choice for applications where space is limited or weight savings is important.

We manufacture all of our products in our AS9100 Rev D / ISO9001:2015 & Nadcap certified facility in Poughkeepsie, NY and can easily achieve tolerances measured in millionths of an inch.

Lubricants in anti-friction bearings reduce friction and wear between moving parts, dissipate heat and prevent corrosion on critical surfaces. Kaydon recommends selecting the appropriate lubricant based on the system design engineer’s evaluation of operating conditions, including at a minimum: rotational speed, load type and size, and ambient temperature. The three commonly used lubricants are oil, grease and dry film or surface treatment.

Sealed bearings are equipped with an anti-corrosion oil coating to prevent corrosion during storage. Kaydon recommends using clean petroleum solvent to remove preservatives before lubrication. If the anti-corrosion oil is not removed, the compatibility of the lubricant with the anti-corrosion oil must be confirmed.

If you need aircraft bearings, it’s important to choose an AS9100D-certified manufacturer with approved products that meet tough industry standards. In addition to the right materials and tolerances, engineers and procurement personnel need to consider factors such as minimum order quantities and lead times. As a Made in America manufacturer, Schatz can help you to shorten your supply chain with reliable product deliveries from our distributor network or directly from our Poughkeepsie, New York facility.

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Listed shaft and housing diameters are for steel supports with standard bearing diametral clearance. Recommended shaft and housing diameters can change greatly based on orientation, temperature, speed, non-standard diametral clearances, and desired performance characteristics. Contact Kaydon for design assistance when required.

Oil generally provides complete lubrication. Due to its liquid state, it provides better coverage of key surfaces and helps dissipate heat easily, the latter especially when providing circulation and cooling. Oil is necessary in high-speed applications where the heating effect is pronounced. Oil usually provides lower friction values when minimum torque is required.

Boeing, U.S. military, and SAE bearings standards define requirements such as materials of construction and part tolerances. For the rings and balls, aircraft bearings typically use these metals: SAE 52100, 440C or 440C modified, CREN high nitrogen stainless steel, or M50. Hybrid bearings with ceramic rolling elements and steel rings are also used and can support higher speeds and extended wear life. As a knowledgeable aircraft bearing manufacturer, Schatz can help you to compare these materials and evaluate them in terms of fatigue and corrosion resistance.

Because grease is easily retained, the design of the bearing housing and seals is simplified. In many applications, the lubricant itself can act to exclude contaminants when used in conjunction with labyrinths or tight gaps between rotating and stationary structures. For higher speeds in the range suitable for grease lubrication, channel-type greases are usually chosen.

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Dry film and surface treatments have been used as bearing lubricants in applications in extreme environments, especially where conventional lubricants cannot withstand or survive. Several types are available; options include tungsten disulfide, graphite, and molybdenum disulfide.

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The maximum supported file size is 10MB, For larger or multiple files please place into one folder and compress into a ZIP or RAR file and sent to info@aubearing.com

* Diametral clearance after installation theoretically can range rather widely if all contributing bearing, housing, and shaft tolerances are at either of their extremes. Diametral clearances shown do not apply to Type A (angular contact) bearings.

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Ultra-thin Reali-Slim bearings bring additional advantages in application design. The ultra-thin Reali-Slim bearings with large bore diameter and small cross-section allow the use of large diameter hollow shafts instead of small diameter solid shaft, main column designs. Components such as air and hydraulic lines or electrical wires and slip rings can then be accommodated within the hollow shaft, resulting in a cleaner, efficient design. In many applications, a single four-point contact Reali-Slim bearing can replace two bearings, shrinking the design and simplifying bearing installation. In addition to the obvious cost savings of eliminating one bearing, this arrangement creates space and reduces weight. The use of Reali-Slim bearings also provides a stronger structure by using a large diameter hollow tube instead of a solid shaft and supporting the rotating structure (table) on the periphery.

Our Bearing Design Solutions and catalog of prespecified precision bearings always meet or exceed the demanding requirements of modern aerospace bearing applications, as well as industry-leading aerospace, defense, and space organizations.

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Schatz is an aircraft ball bearing manufacturer with products that are approved to standards from the likes of Boeing and the U.S. military. Unlike a supplier of bearings for ceiling fans or consumer appliances, Schatz specializes in the design of manufacturing of precision ball bearings for civilian and military aviation. Our quality management system is AS9100D certified, but that’s just part of what makes us a trusted aircraft bearing manufacturer. Keep reading to learn more, or view our on-line catalog of Made in USA aircraft bearings.

Alphabetic characters“A” in position 3 in combination with “A” in position 2denotes .187 x .187 series“A” in position 3 in combination with “H” in position 2denotes .187 x .250 series“A” in position 3 in combination with “S” in position 2denotes .187 x .312 series

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The seal is effective, but requires turning force (torque), generates heat, and therefore has a lower speed limit than open or shielded Reali-Slim bearings. Reali-Slim bearings can be integrally sealed or externally sealed. Lubricant and lubrication system, torque requirements, speed and operating environment will influence selection. Integral seals and guards provide a very compact overall design and have the added advantage of protecting the bearings before, during and after installation. EA/EB bearings are used where a guard is sufficient or where a guard is required due to torque or speed limitations. When weight and space are at a premium and a seal or guard is required on only one side, single-seal or single-shield bearings are available as custom options. NOTE: Sealed Reali-Slim bearings are pre-lubricated with general purpose grease. Operating conditions (i.e. time, temperature, speed, environment) may cause premature degradation of lubrication. A variety of lubricants are available to meet your specifications.

Gothic arch form for two 30° contact angles under light radial gaging load. Sufficient diametral clearance to provide clearance after installation with recommended fits.

The specifications of Reali-Slim thin-section bearings are extremely important for the traceability of bearing products. Specification control charts provide users with the characteristics and parameters of a specific bearing, as well as the ability to generate unique numbers and other options for the bearing. This allows you to identify bearings quickly and easily. Each series of Reali-Slim bearings is based on a cross-section that remains constant as the bearing’s bore diameter increases. The constant cross-section of Reali-Slim bearings is of particular value when designing products that will be manufactured in various sizes depending on shaft diameter and power requirements. Kaydon Reali-Slim® bearings can be optimized for specific applications and custom manufactured with non-standard materials, dimensions, tolerances, properties, and custom packaging and lubrication options. Standard commercial options include diameter clearance variations, preload, lubricants, packaging, high-point etching, and .

Seal: A contact closure between a stationary and rotating part that retains lubricant within the bearing and prevents foreign matter from entering the bearing. The seal is fixed in the outer ring and in close contact with the inner ring.

It is important to note that the amount of lubricant affects bearing performance under specific operating conditions. If a film of oil is maintained on all contact surfaces, only relatively small amounts of lubricant are needed to reduce friction and wear. At higher speeds, excess oil or grease can lead to higher operating temperatures, which can lead to early bearing fatigue. Typical grease fill levels range from 10% to 30% of the bearing’s available free space, depending on the bearing design and application.

Tolerances for bearings are allowable variations between manufactured parts. During the bearing design process, engineers can specify less expensive commercial tolerances or more expensive precision tolerances. In the aircraft and aviation industries, “tighter” or more precise tolerances are needed to meet demanding application requirements. Unlike a ceiling fan or a washing machine, the ball bearings on a commercial airliner or jet fighter must not fail as they withstand high speeds, temperatures and loads.

We produce precision OEM parts for the world’s leading commercial aerospace companies and bearings that meet or exceed the critical standards set by defense organizations. Our aerospace bearings withstand the speed, temperature, and load specifications of the aerospace and defense markets by providing high stiffness and low torque while still maintaining weight and size restrictions. Our proprietary and standard thin section bearings are engineered specifically for in-the-air and battlefield applications.

For the 3D drawing, we prefer to STEP, IGS or X_T format. The maximum supported file size is 10MB, For larger or multiple files please place into one folder and compress into a ZIP or RAR file and sent to info@aubearing.com

To realize the full potential of Reali-Slim bearings, Kaydon recommends that customers’ maintenance instructions and plans should take into account operating conditions and include procedures to ensure that the bearings are adequately protected against intrusion of all types of foreign matter, and that fresh oil or grease is introduced with sufficient frequency to Clean bearings and ensure adequate lubrication.

We also have decades of experience designing bearings and creating bearing standards for a variety of industries including medical equipment, automation & robotics, and machinery for construction and agricultural applications.

Examples040 = 4.0″ bore120 = 12.0″ bore400 = 40.0″ bore“10” following “AA” in positions 2 & 3 =.187 x .187 series with 1.0″ bore“15” following “HA” in positions 2 & 3 =.187 x .250 series with 1.5″ bore

Reali-Slim thin-section bearings are a shining pearl among industrial bearings and are world-famous for their space and weight savings. This blog will comprehensively introduce the specifications, sealing, tolerances, lubrication, code identification, and how to choose the appropriate bearing for Reali-Slim thin-section bearings, and provide you with constructive suggestions.

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Schatz makes specific types, or series, of precision bearings that are approved to Boeing standards and U.S. military specifications. Visitors to our website can easily cross-reference Boeing part numbers to Schatz series numbers. Our website also lets visitors cross-reference Schatz series numbers to military part numbers. The term “U.S. military specifications” is sometimes abbreviated as MIL-SPEC or Mil Spec, but military and defense bearings generally begin with MS.

Listed shaft and housing diameters are for steel supports with standard bearing diametral clearance. Recommended shaft and housing diameters can change greatly based on orientation, temperature, speed, non-standard diametral clearances, and desired performance characteristics. Contact Kaydon for design assistance when required.

When high standards for bearing quality and performance are critical, our technical team is equipped with the most advanced precision instruments to assess your bearing application needs. Our team of designers and engineers will work with you to customize cost-effective bearing solutions that meet your specific application.

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*Diametral clearance after installation theoretically can range rather widely if all contributing bearing, housing, and shaft tolerances are at either of their extremes.

Some military-approved bearings have AS designations instead. These standards are accepted by the DoD but developed by SAE International, a global association of engineers and technical experts in the aerospace, automotive, and commercial vehicle industries. As an experienced airframe bearing manufacturer, Schatz understands what’s required by these standards and can consistently manufacture quality products such as airframe control bearings for flight control or drive systems.

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Diametral clearance for 30° contact angle in single unmounted bearing under light axial gaging load. Wide range of preload or running clearance for matched sets.

All Reali-Slim® bearings requiring compliance with Defense Federal Acquisition Regulations (DFAR) “Specialty Metals” and “the Restrictions on Acquisition of Ball and Roller Bearings” clauses will contain ‘-USA’ in positions 10-13. If internal fit is not called out in position 9, it will also contain a dash.

Kaydon Reali Slim thin section bearings are available in both inch and metric size standards. Inch size Kaydon Reali Slim thin section bearings are available in seven open series and five sealed series, with bore diameters ranging from 1 inch to 40 inches, and cross-sections ranging from 0.187×0 .187 inches to 1×1 inches. Kaydon thin section bearings can provide internal assembly, lubricants, cages and other features to meet the most demanding application requirements. If corrosion resistance is required, Kaydon stainless steel Reali Slim or Endura Slim series bearings are good options. The anti-corrosion performance of Endurakote-coated bearings is better than that of stainless steel bearings. Metric Kaydon also has several series, including Kaydon Reali Slim MM metric series bearings, Ultra Slim bearings, Reali Smim TT series turntable bearings, BB metric ball bearings, KT thin-section tapered bearings, etc.

Getting the best ball bearings involves asking and answering a series of questions. This Q&A from Schatz Bearing, a leading provider of precision ball bearings, can get you started. What is the application? The best ball bearings are used in

AS9100D is a quality standard for the aircraft, space and defense industry that has been endorsed by the U.S. Federal Aviation Administration (FAA), the National Aeronautics and Space Administration (NASA), and the Department of Defense (DoD). Revision D (AS9100D) is the current version of AS9100, which also references standards such as AS9102 for first article inspection (FAI). During FAIs, a manufacturer selects parts from a production run for testing, inspection, and documentation.

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Type X or C = diametral preload or clearanceDuplexed type A = axial preload or clearanceNote: Above internal bearing fits apply to unmounted bearings only.Mounting fits can greatly affect final internal bearing fit.

“The Schatz Team’s responsiveness and willingness to work within our quantity request and tight timeline has proven invaluable. Not only did they exceed our expectations for the scope of our project; they also showed flexibility with contracts due to ongoing negotiations with our customers. This has proven to be a true partnership.”

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In order to take full advantage of anti-friction bearings, it is important to keep them clean and well lubricated. Properly designed and installed seals and guards help achieve this.