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CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSStandard designsTHE WAVESEAL FAMILYCRW1 CRWH1CRWA1 CRWHA1CRW5CRWA5A Waveseal design from CR represents one of the most important developments in radial shaft seals.The ”conventional” sealing lip has a straight edge, whereas the edge of the CR Waveseal has a specialhydrodynamic form. The Waveseal lip describes a sinusoidal, extended path on the shaft and therebyreduces the specific surface pressure in the sealing lip/shaft contact. As a consequence, CR Waveseals produce up to 20% less friction and up to 30% lower temperatures than conventional seals. These advantages also prevent the formation of deep tracks on the shaft and provide much longer service lives.CR Waveseals are suitable for both directions of rotation; they pump the lubricant back into the bearingarrangement and expel contaminants. Their use is specially recommended where demands for operational reliability and long service life for machines and equipment are high. They are available in CR seallip material R (NBR) for general purpose and in CR lip material V (FPM) for higher operating temperatureand for extended chemical resistance.On CR Waveseals, the secondary lip (dust lip) forms a narrow gap to the shaft and there is practically nocontact. Because of this, the Waveseal with an additional dust lip can be operated at the same speeds assingle-lip designs, without causing higher temperatures while providing enhanced sealing.For comprehensive technical data and recommendations about machining and installation, please see our”CR Industrial Shaft Seals Handbook”, SKF publication 5300.Conventional sealing lip with straightedge10oil sideair sideoil sideair sideCR Waveseal withsinusoidal edge

P R O D U C T O V E RV I E WFEATURES CRW1 Series: Low friction radial shaft seals with reduced heat generation for a very widerange of applications. Long-life seals for easy installation and a firm and accurate seating in the housingbore. Primarily for lubricant retention but seals of CRWA1 and CRWHA1 designs are also suitable forexclusion of dust and light contamination. CR Waveseals are coated on the outside diameter with BoreTite, a non-hardening, water-based polyacrylate sealant, which helps to fill out small imperfections in thehousing bore.CRW1: Seal with single steel shell, Bore-Tite coated outside diameter, hydrodynamically formed Waveseallip and carbon steel garter spring.CRWH1: Seal with double steel shell, Bore-Tite coated outside diameter, hydrodynamically formedWaveseal lip and carbon steel garter spring.CRWA1: Seal with single steel shell, Bore-Tite coated outside diameter, hydrodynamically formedWaveseal lip, carbon steel garter spring and non-rubbing secondary lip.CRW1CRWHA1: Seal with double steel shell, Bore-Tite coated outside diameter, hydrodynamically formedWaveseal lip, carbon steel garter spring and non-rubbing secondary lip.CRWH1FEATURES CRW5 Series: Radial shaft seals for applications where pressure differential across the seal ismoderate. For easy installation and a firm and accurate seating in the housing bore. Primarily for lubricant retention, but the CRWA5 design will also exclude dust and light contamination. Where there is apressure differential across the seal, the seal should be axially secured in the housing bore.CRWA1CRW5: Seal with steel shell, Bore-Tite coated outside diameter, hydrodynamically formed Waveseal lipand carbon steel garter spring.CRWA5: Seal with steel shell, Bore-Tite coated outside diameter, hydrodynamically formed Waveseal lip,carbon steel garter spring and non-rubbing secondary lip.CRWHA1CR Waveseals, CRW1 range, are stocked in a wide range of sizes. CR Waveseals, type CRW5, are onlypartially available from stock. Please contact us for information about availability and delivery time.For comprehensive technical data, recommendations about machining and installation and size listsplease see our catalogue ”CR Industrial Shaft Seals Handbook”, SKF publication 5300.CRW5CRWA511

CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSPTFE SealsTHE CR RD SEALS FAMILYCR RADIAL SHAFT SEALS OF PTFE WITH METAL CASE, SERIES RDRadial shaft seals with one or more metal shells and sealing lip(s) of PTFE. They aredesigned to withstand e.g. aggressive environments, high temperatures, high pressuresand non-lubricated services. For assembling in existing housings where traditional radialseals are used, provided that they are produced in accordance with DIN 3760/ISO 6194-1.RD10RD11RD30MATERIAL: Metal case in steel, aluminium or stainless steel, sealing lip in optional FDAapproved PTFE materials, depending on each specific demand.RD60RD70RD10RD11RD30RD60RD70RD71RD71CR RADIAL SHAFT SEALS OF PTFE WITHOUT METAL CASE, SERIES RDDRDD13Radial shaft seals can also be produced purely of PTFE without a metalcase. These are used e.g. in the food industry to enable dismounting ofthe equipment for cleaning. Radial shaft seals of PTFE are also appropriate in applications in aggressive environments or with temperaturesbelow –20 C (–4 F). Type RDD without metal case has the same housingdimensions and the same technical specifications as type RD with ametal case.RDD13CR Radial Shaft Seals of PTFE, designs RD and RDD, can be deliveredwith short notice. Please ask your nearest SKF representative for availability and delivery time.For comprehensive technical data and recommendations about machining and installation, please see our ”CR Industrial Shaft SealsHandbook”, SKF publication 5300.RDD14RDD14RDD15RDD1512

P R O D U C T O V E RV I E WCR RADIAL SHAFT SEALSSealing lip materials, overviewIn addition to seal design, the sealing lip material significantly contributes to seal performance and reliability. To cater for the different demands of applications, CR seals are produced in a variety of sealinglip materials, see list below. These materials have characteristics, individual properties, making themparticularly suitable for specific applications.Details about physical properties and the chemical resistance of the seal materials to various mediaencountered in operation will be found in the section ”Chemical resistance” in our CR Industrial ShaftSeals Handbook”, SKF publication 5300.A code is used to identify the material of the sealing lip of CR seals, see table below. The codes alsoappear in the designations of the radial shaft seals. For seals produced in a combination of materials,a combination of the code letters is used, e.g. RV (nitrile rubber with fluoro rubber).CR SEALING LIP MATERIALSCOMPOSITIONOF BASIC MATERIALDESIGNATIONACCORDING TOPERMISSIBLE OPERATINGTEMPERATURE RANGECRIS01629IS01043.1DIN 7728 PART 1ASTM D1418ASTM D1600Acrylonitrile butadiene rubber(nitrile rubber)Hydrogenated acrylonitrilebutadiene rubber (Duratemp)R (RG)NBRNBR–50 to 100ºC (–58 to 212 F)HHNBRNEM–30 to 150ºC (–22 to 302 F)Carboxylated nitrile rubber (Duralip)DX-NBRX-NBR–50 to 100ºC (–58 to 212 F)Fluoro rubber (LongLife)VFPMFKM–40 to 200ºC (–40 to 392 F)Polytetrafluoro-ethylene (PTFE)TPTFEPTFE–70 to 260ºC (–94 to 500 F)13

CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSStandard designs, selection factor matrixTHIS MATRIX CAN ONLY PROVIDE A ROUGH GUIDE AND THE FINAL SEAL SELECTIONSHOULD ONLY BE MADE AFTER A MORE DETAILED EXAMINATION OF SEALING PROPERTIESWITH RESPECT TO THE ACTUAL OPERATING CONDITIONS AND ENVIRONMENT. IF SEVERALSEAL DESIGNS AND MATERIALS ARE SHOWN TOGETHER THEN THE RATINGS APPLY TO THESPECIFIED DESIGN/MATERIAL.SHELL (OUTSIDEDIAMETER)SIGNS AND SYMBOLSMATERIALA RUBBINGB NON-RUBBINGNITRILE RUBBERFLUORO RUBBERDESIGNRVSECONDARYLIPELASTOMER(PLASTOMER)VERY WELL SUITED (VERY GOOD)WELL SUITED (GOOD)SUITABLE (NORMAL)LESS SUITABLE (SATISFACTORY)UNSUITABLE (POOR)SEALING LIPSTEEL –––DESIGN–R,VnormalR,VB (HMSA10)–R,VnormalR,VA (HMSA7) Bore-Tite–WavesealR,V–CRWH1CRWA1CRWHA1 Bore-Tite–WavesealR,V–WavesealR,VB (CRWA5)CRWA5 Bore-Tite–CRW5 –normalR,V–CRS1CRSH1CRSA1CRSHA1 –normalR,VARD10RD30RD60 –specialPTFE– –specialPTFERD11, ��SEALS TYPESHMS5HMSA10HMS4HMSA7CRW114

P R O D U C T O V E RV I E WSUITABILITYEASE OF INSTALLATIONHOUSING BORE/OUTSIDE DIAMETERSEALING LIP/COUNTERFACESLIDING SPEEDS 14 m/s ( 2 756 ft/min)SLIDING SPEEDS 14 m/s ( 2 756 ft/min)TEMPERATURES 100 ºC ( 212 F)TEMPERATURES 100 ºC ( 212 F)RUNOUTCOAXIALITY DEVIATIONGREASEOILMODERATE PARTICULATECONTAMINATIONMEDIA – V HMSA10 (V) – V HMSA7 (V) CRWH ––– V (V) CRWHA ––– V (V) ––– V (V) CRSH–––– – – V (V) CRSHA–––– – – V (V) ––– – ––– RD11RD71 –– – 1)1)1)HEAVY PARTICULATECONTAMINATIONSPLIT HOUSING BOREMEDIATHERMAL EXPANSIONOPERATING CONDITIONSROUGH SURFACEPRESSUREDIFFERENTIALTIGHT FITSEATING CONDITIONS1) together with a separate static seal15

CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSLarge diameter sealsHDS716

P R O D U C T O V E RV I E WA WIDE RANGE OF SEALING SOLUTIONS FOR HEAVY INDUSTRYHeavy basic industries such as primary metals, construction, wind energy, forestry, mining and pulp & paper,provide a challenging environment for radial shaft seals. Operating in a wide range of speeds, temperatures,and environmental conditions, shaft seals are asked to reliably retain lubrication while avoiding harsh contamination from penetrating and potentially damaging capital equipment. Generally, CR Radial Shaft Seals forshaft diameters larger than 200 mm or 8 in are known as large diameter seals (LDS).CR LDS are available from SKF in a variety of heavy-duty styles, configurations and materials: HD Metal Clad Designs, including the HDL ultra-high performance series the technologically advanced HDS7 (EP-2000) grease seal other types of the high-performing HDS series; all-rubber seals like the premium SBF seal the HSF fabric reinforced series, solid or split.As a general recommendation, these different CR LDS designs are suitable in applications as follows:APPLICATIONSSOME ROLLING MILLSWIRE & BARGENERAL MACHINERYINDUSTRIAL GEARBOXESGeneral PurposeSOME ROLLING MILLSHOT STRIP MILLSCOLD ROLLEDPLATE MILLSINDUSTRIAL GEARBOXESINDUSTRIAL GEARBOXESGENERAL MACHINERYROLLING MILLSSPECIAL MACHINERY:CRUSHERS, SHREDDERS,BAILERS, ETC.Grease, Water / ScaleOil, high speedHigh DRO and STBMexclusion( 25 m/s, 4 291 ft/min)levelsHDS1,2,332xxHDS7 (EP-2000)x3xxHDL2133HDS4, HDS62232SBF, HSF31xx1 – Good solution, 2 – Better solution, 3 – Best solution, x – Not recommended17

CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSLarge diameter sealsTHE CR METAL CLAD SEALS FAMILYHDS7HDS7CR has developed the HDS7 as a grease seal with enhanced exclusion capabilities. It has a computer optimized, spring-less lip profile designed to retain lubricants and aggressively pump contamination awayfrom the lip. The increased ability of the HDS7 to exclude contamination makes it an ideal equipmentprotector in heavily contaminated environments, such as the water and scale present in rolling mill applications. The spring-less lip concept of the HDS7 also reduces radial load. The HDS7 is available in a nitrilelip material for common applications, Duratemp for higher temperature conditions, and Duralip forapplications where extra abrasion resistance is necessary. Short information about recommended operating conditions is shown in the table on page 24 - 25 in this brochure. For comprehensive technical data,recommendations about machining and installation as well as for information about available sizes,please see our technical brochure ”CR Large Diameter Seals”, SKF publication 5399.HDLHDLHDLP18HDLPThe CR HDL seal is a premium metal clad oil seal that is especially designed to operate in severe conditions including high speeds and temperatures, high run-out, and high misalignment. Type HDLP has anon-frictional secondary sealing lip against contamination. The CR HDL seals have a stainless steel garterspring that is entrapped by individual finger springs, also made of stainless steel, around the entire circumference of the seal. This spring combination allows the seal to compensate for severe conditions inorder to maintain high levels of sealing performance, operational life, and equipment reliability. The HDLis available with sealing lip in nitrile rubber, Duratemp and LongLife. Short information about recommended operating conditions for the CR HDL series is shown in the table on page 24 –25. For comprehensive technical data, recommendations about machining and installation as well as for information aboutavailable sizes, please see our technical brochure ”CR Large Diameter Seals”, SKF publication 5399.

P R O D U C T O V E RV I E WHDS1, HDS2, AND HDS3: The most commonly used metal clad seals for general purposeapplications. All three seal versions are encased in a heavy-duty steel shell and a stainlesssteel spring is standard.The basic HDS1 has its stainless steel spring mounted in a protective Spring-Lock groove.HDS1Where blind installations may increase the risk of spring displacement, the type HDS2adds a Spring-Kover that bonds the spring to the groove.The HDS3 adds a spark-free inner diameter, standard Duralip material and adjustablespacer lugs. The adjustable lugs are optional on all other HDS models, which are fixedwith lugs.Nitrile rubber is standard on all HDS seals (with the exception of the HDS3 where Duralipis standard), however all seal types can also be ordered in Duralip, Duratemp or LongLifeelastomers.HDS2Short information about recommended operating conditions is shown in the table page24 - 25 in this brochure, for comprehensive technical data and recommendations onmachining and installation, please see our ”CR Industrial Shaft Seals Handbook”, SKFpublication 5300, or our technical brochure ”CR Large Diameter Seals”, SKF publication5399.The HDS seal product line is available in a wide variety of rubber materials in all sizesranging from 200 to 1 575 mm (8 to 62 in).HDS3HDS1HDS2HDS319

CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSLarge diameter sealsTHE CR METAL CLAD SEALS FAMILYHDSA, HDSB, HDSC: These seals are designed with a single rubber sealingelement and an auxiliary exclusion element and are generally used wherethere is insufficient space for more than one seal. For shaft sizes up to550 mm (21.750 in), the excluder lip is made of Duralip material. Leatheris used for larger shafts.HDSA2HDSA1HDSB2Short information about recommended operating conditions is shown inthe table on page 24 –25 in this brochure. For comprehensive technicaldata, size list and recommendations about machining and installation,please see our technical brochure ”CR Large Diameter Seals”, SKF publication HDSE: This style features dual elements with lips facing the same direction. This seal type is used where a back-up seal is desired for retentionor exclusion purposes.HDSE2HDSD: The HDSD seal types are designed with dual sealing elements withlips facing opposite directions. This style is used for applications requiringthe separation of two fluids.HDSE2HDSE1When using an HDSD or an HDSE seal, it is very important to providemeans to lubricate the sealing elements (i.e. the cavity between the sealing elements may be packed with grease or holes may be drilled fromthe outside diameter into the cavity between the lips).Short information about recommended operating conditions is shown inthe table on page 24 –25 in this brochure. For comprehensive technicaldata, size list and recommendations about machining and installation,please see our technical brochure ”CR Large Diameter Seals”, SKF publication 5399.HDSD2HDSE1HDSD1HDSD1HDSD220

P R O D U C T O V E RV I E WTHE CR ALL-RUBBER SOLID SEAL TYPESSBF: The SBF seal design is a new rubber outside diameter seal with aflexible metal stiffening ring that allows mounting without the use of acover plate. The SBF seal can be used as an upgrade to rubber fabric sealsin many applications either they are grease or oil lubricated.SBFSBFThe SBF seals are available in both NBR and LongLife (FKM) materialswith optional Spring-Kover. Please contact us for information about delivery time.Short information about recommended operating conditions is shown inthe table on page 24 –25 in this brochure. For comprehensive technicaldata, size list and recommendations about machining and installation,please see our ”CR Industrial Shaft Seals Handbook”, SKF publication5300, or our technical brochure ”CR Large Diameter Seals”, SKF publication 5399.The CR family of all-rubber seals includes metal inserted (HDS4, HDS6 andSBF), fabric-reinforced (HSF) and all-rubber (HS) products. The fabric-reinforced and all-rubber versions are available as solid round or with anopen joint or split.HDS4HDS6HDS4HDS4 and HDS6: The HDS4 features a patented moulded-in garter springwhich cannot be displaced during difficult installations and providessuperior oil sealing ability while minimizing wear.The HDS6 is a springless version designed for grease retention and contamination exclusion. Nitrile rubber is standard and can be ordered in thefull range of CR LDS rubber compounds.HDS6Both HDS4 and HDS6 are equipped with moulded 12,7 mm (0.5 in) spacerlugs which can be trimmed or removed if necessary.The HDS4 and HDS6 are stocked in a limited range of sizes; please contactus for information on availability.Short information about recommended operating conditions is shown inthe table on page 24 –25 in this brochure. For comprehensive technicaldata, size list and recommendations about machining and installation,please see our ”CR Industrial Shaft Seals Handbook”, SKF publication5300, or our technical brochure ”CR Large Diameter Seals”, SKF publication 5399.21

CR INDUSTRIAL SEALSCR RADIAL SHAFT SEALSLarge diameter sealsTHE CR ALL-RUBBER HS SOLID AND SPLIT SEAL TYPESHS solid seals can be made as standard types from 203 mm (8 in) up tounlimited shaft size.HS3 seals are all-rubber solid seals with a single spring-loaded element.The spring is held in an open groove; Spring-Kover is not available. HS3 isrecommended for vertical and horizontal shafts. For proper fit, a coverplate is required.HS5The HS4 seal is an all-rubber solid seal with a single spring-loaded element. It features a Spring-Lock and is recommended for vertical and horizontal shafts. For proper fit, a cover plate is required. HS5 is the same asHS4 with the addition of a Spring-Kover for added protection againstspring pop out and contamination.HS split types: Where downtime is critical and shaft removal is impractical, type HS all-rubber split seals are ideal. They are

FEATURES: New CR standard line of rubber covered radial shaft seals for the most demanding require- ments in general industry. Designed according to DIN 3760/ISO 6194-1. Type HMSA10 RG with a secondary lip ("dust lip"), with zero lip/shaft interference, for protection against contamination. Spring loaded seal- ing lip, trimmed on the front face.