SKF Explorer sealed spherical roller bearings

1 SKF Explorersealed spherical roller bearingsSKF/SRB brochure 27/8/03 8:54 AM Page 3 SKF Explorer sealed spherical roller bearings - environmentally friendly units for longer lifeSealed spherical roller bearings arecharacterised by several valuableproperties. They are: sealed at both sides with rubbingseals, which retain grease in the bearing Protected against contamination and moisture Ready-to-mount and normally maintenance-free Not affected by normal angularmisalignment and shaft alignmenterrors Capable of carrying heavy loads Due to the integral seals and the incorporated grease fill, they are able to:- Allow simpler and space saving bearing arrangements, thus saving total costs- Provide long service life and high reliability with minimal maintenance requirementsOf particular and ever-increasingimportance is that sealed sphericalroller bearings are environmentallyfriendly and conserve spherical roller bearingsare especially ideal for bearing positions where, because of limitedspace or for cost reasons, sufficientlyeffective external seals cannot simply because of the expertise behind the efficient seals.

2 In 1919, SKF invented the spherical roller bearing . SKF hascontinued to further develop andrefine the design, including the wayit is sealed . The best proof of thetotal quality of SKF spherical roller bearings is their success. Twice asmany SKF spherical roller bearingsare used today as those of any other bearing spherical roller bearings are state-of-the-art products. Theyare the subject of a continuousimprovement process designed to further enhance performance and reliability, with the aim of conquering new and even moredemanding development of the sealedspherical roller bearing has followedthe SKF tradition. High demands on sealing efficiency and operationalreliability has been fulfilled. Theseals have been extensively testedboth in the laboratory and in thefield, and have proven their reliableperformance and sealed spherical roller bearings from SKF?The use of SKF Explorer sealedspherical roller bearings willprovide the following benefits: Very high combined load carrying capacityBoth radial and axial, as the internal geometry of the bearings corresponds to that of the open (unsealed) bearings .

3 Wide range of applicationsTwo different seal variants and two different greases can be supplied - for normal and for high operating contaminants excludedRuggedTolerant to alignment errorsResistant to elevated temperaturesMoisture cannot enterAlways operationally reliable Long service lifeProven design. Appropriate greases and efficient sealing make this possible. Minimum maintenance requirementsHighly efficient seals keep contaminants and moistureout, and the grease in. Better for the environmentThe bearings are normally maintenance-free. This reduces grease consumption and conserves C180 CSKF/SRB brochure 27/8/03 8:54 AM Page 4A wide assortmentThe range of SKF Explorer sealed spherical roller bearings comprises bearings with cylindrical bore for shaft diameters of 25 to 220mm, from seven different bearing series. bearings with tapered bore can be produced to special spherical roller bearings , depending on seriesand size, are produced in the E or the CC design.

4 Sealedbearings of the CC design generally have the same boundary dimensions as the corresponding open E designated bearings have extended seals have been specially developed for sphericalroller bearings and effectively prevent contaminants from penetrating to the rolling contact area. This is notonly true in operation, but also during bearing installation,resulting in a long service particularly suitable greases have been chosen for the bearings . One is an SKF grease recommended for normal operating temperatures with nitrile seals. The other, a special high-temperature grease, is used in combination with fluoro rubber seals for high-temperature design features Two windowtype steel cages centred on the inner ring and a floating guide ring between the two roller rows. Two windowtype steel cages,a flangeless inner ring and a floating guidering between the two roller guide ring, which is centredon the inner ring, also guides thecages.

5 Very high loadcapacityThe rollers position them-selves automatically so that theload is evenly distributed over the whole length. This results in very high load carrying capacity No edge stressesBecause of the special roller profile there isvirtually no danger of stressesBenefits of sealed spherical roller bearingsDesignCapacity Well protected The bearings have a sheet steel reinforceddouble-lip seal at each side. The seals are made of nitrile rubber or fluoro rubber. Thenitrile rubber seals are for normal operating conditions and canoperate at high speeds. The fluoro rubber seals are for hightemperatures and primarilyintended for low speed operation. Lightweight,high strength cages The windowtype steel cages are light but verystable and wear-resistant. Theytake up very little space so that anample supply of grease can becontained in the bearings with nitrile rubber seals for normal operating temperaturesand reasonable speeds are lubri-cated with an SKF lithium basegrease with good rust inhibiting properties.

6 The bearings for hightemperature use have fluororubber seals and are lubricatedwith a high temperaturepolyurea base grease. Low friction and low heat generationThe patentedself guidance of the rollers andthe floating guide ring, whichguides the rollers axially throughthe load zone, keep friction andheat generation designCC designThe design of SKF Explorer sealed spherical roller bearings corresponds to that of the open (unsealed) standard bearings , and incorporates the same uniquedesign features. These include: Self-guiding rollers - an SKF patent Floating guide ring between the two rows of rollers bearing components dimensionally stabilised for high temperatures Window-type steel cagesAdditional features of the SKF Explorer sealed spherical roller bearings include: Double-lip, sheet steel reinforced seals and A grease appropriate to the operating conditionsThe result is a ready-to-mount, lubricated-for-life bearing advantages include a simplification of the bear-ing arrangement design, and the option to downsize thearrangement.

7 Relubrication equipment is not is no waste grease in cooling water systems, andthere are no disposal costs for used of thumbSealed bearings do not need relubrication when the temperatures do not exceed 70 C (158 F) and speedsare not more than 50% of the speed rating in the bearing brochure 27/8/03 8:54 AM Page 6 SKF Explorer benefit chainSKF of originYear of manufactureEnvironmentally friendlyEndurance life testRecognised competitors Low costalternative* bearing life (million rev.) Easier to handle, maintainingalignment during assembly. Ensures bearings areassembled uncontaminated. Reduced lubricant consumption.*Refer to pages 18-19 in brochure 5100 ESize downLonger bearing lifeExtra bonuswith sealed bearingsExtra bonuswith sealed bearingsExtra bonuswith sealed bearingsReduced power usageReduced maintenance costsEquivalent load ratingsHigher speedsLess vibrationsLess noiseLess lubricantLess heatSKF/SRB brochure 27/8/03 8:54 AM Page 5If you re replacing a conventional bearing with an SKF Explorer sealed spherical roller bearing , the SKF Explorer bearing will run quieter and longer - much longer than the bearing you you buy new machinery that has been downsized,with an SKF Explorer bearing you ll see the benefitsimmediately.

8 Your new machine will run quieter andcooler with less vibration. It will consume less power,require less maintenance and run , the next time you re replacing a bearing , or specifying the bearings for a new piece of equipment,ask for SKF Explorer sealed spherical roller sealed spherical roller bearing applicationsConveyor belt stacker equipmentIncreased load carrying capacity, higher speed and longer bearing life in upgraded corrugating machines, with sealed spherical roller pumpsThe use of sealed spherical roller bearings led to considerable cost savings - reduced maintenancecosts and eliminated grease and grease pump car assemblySafe, strong and reliable bearings thatrequire a minimum of maintenance areespecially appreciated in applicationswhere maintenance is difficult and wherethe security regulations are handlingThe possibility to standardise a morecompact bearing arrangement with a longer service life was the mostimportant advantage for this slimmedstorage robotsSKF Explorer sealed spherical rollerbearings made the use of extra sealsand grease in stock distance between the bearings inthe wire drum of this process crane wasreduced by 40% and the shaft diameterby 20%.

9 All thanks to the use of sealedspherical roller brochure 27/8/03 8:54 AM Page 1 SKF is a registered trademark of the SKF Group. Copyright SKF 2003 Publication UK 0905 ESKF ( ) LimitedSundon Park Road, LutonBedfordshire LU3 3 BLTel: 01582 490049 Fax: 01582 848091E-mail: brochure 27/8/03 8:54 AM Page 2