Radial shaft seals RADIAL SHAFT SEALS Radial shaft seals are suited for use on rotating machine elements, such as shafts, hubs and axles. They are used to seal against a wide variety of media statically and dynamically. Typical fields of application include powertrain technology, agricultural and construction machinery, wind turbines, ship-building and other areas of application in the manufacture of machines and devices. Radial shaft seals from the Dichtomatik brand are offered in various designs and materials. The selection of the right option depends on the application and the prevailing operating conditions (media, temperature, the shaft's circumferential speed, and pressure). The standard version consists of an elastomer part, a stiffening ring and a tension spring. Many designs are also available with a protective lip, which also seals off dirt from the exterior. Other configurations such as a double seal lip, seal lips with twist elements, a grooved outer sleeve, and all possible special designs are available on request. The broad array of radial shaft seals can be provided in the standard elastomer materials NBR (black), FKM (brown), and PTFE. Besides standard steel for the spring and stiffening ring, various stainless steel grades are available on request. DIMENSIONS The currently available dimensions can be found on our website dichtomatik.fst.com or on our online ordering platform EASY. PTFE (Polytetrafluoroethylene) • High resistance to ozone, weathering and age • Very low coefficient of friction • Broad chemical resistance • Suited for defective lubrication and dry running • Suited for a broad range of thermal applications INSTALLATION SPACE AND ASSEMBLY Contact surfaces of the shaft and the housing have an impact on sealing functions. As a result, they must meet certain requirements. The surface of the shaft should be ground to the point that it is free of twists and has a surface roughness of Rz = 1 to 4 pm and Rmax <6.3 pm. The roughness values Rz = 10 to 20 pm and Rmax < 25 pm should be observed to ensure the shaft seal's secure seat in the housing bore. To avoid damage to the shaft seal during assembly, appropriate mounting devices must be used, e.g. mounting sleeves. SPECIAL DESIGNS • WAK • WAG • WAX • WAD • WBD SEALING MATERIALS NBR (acrylonitrile butadiene rubber) • Very good wear resistance • Can be used in mineral oils and greases FKM (fluororubber) • Good resistance to aging and ozone • Low gas permeability • Can be used in mineral oils and greases • For chemically aggressive media (acids, alkaline solutions, etc.) • Suitable for high-temperature applications • Suitable for high circumferential speeds • Can be used in synthetic oils and greases FREUDENBERC INNOVATING TOGETHER

Radial shaft seals Profile < 0,05/0,5 • Outer sheath rubberized smooth • With spring _ • WAS: with protective lip (pl) • WAK: outer sheath grooved (without pl) < 0,05/0,5 • WAG: outer sheath grooved (pl) • Outer sheath rubberized smooth WAO NBR 70 -40 to +80 < 6 0/0 • Without spring • WAOK: outer sheath grooved • Outer sheath rubberized smooth • With spring • Pressurizable design • WASY: with protective lip • Outer sheath metallic WB NBR 70 -40 to +80 < 10 < 0,05/0,5 • With spring • Outer sheath metallic WBO NBR 70 -40 to +100 < 6 0/0 • Without spring • WBS: with protective lip • Outer sheath...

• Outer sheath fabric-reinforced • With spring FKM 80 -20 to +100 < 25 < 0,05/0,5 PTFE+ carbon/ graphite • With O-Ring made of FKM 80 as static -50 t°„ < 15 < 1/10housing seal +205 • Various PTFE and elastomer compunds * without media influence ** depending on the number of revolutions *** depending on the O-Ring material selected All data are maximum data under ideal conditions and must not be applied simultaneously. These are dependent on the circumferential speed, as well as shaft 0, material, temperature, pressure, medium and other factors. An individual test run in the application is recommended....