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Recommended Product Range

Bearings for printing pressesand print finishing machines

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Contents

For preferential treatment - the SKF recommended product range … 3Benefits of using SKF recommended product range bearings………………… 3

Bearings used in printing presses and print finishing machines ……… 4Introduction ………………………………………………………………………… 4Deep groove ball bearings ………………………………………………………… 5Self-aligning ball bearings ………………………………………………………… 6Angular contact ball bearings……………………………………………………… 6Cylindrical roller bearings ………………………………………………………… 7Needle roller bearings ……………………………………………………………… 8Inner rings …………………………………………………………………………… 9Printing cylinder bearing units (PCU) …………………………………………… 9Spherical roller bearings …………………………………………………………… 10Taper roller bearings ……………………………………………………………… 10Track runner bearings ……………………………………………………………… 11

Recommended product range matrices and tables …………………… 12Bearing designations ……………………………………………………………… 12Designation suffixes………………………………………………………………… 12Deep groove ball bearings ………………………………………………………… 14Self-aligning ball bearings ………………………………………………………… 15Single row angular contact ball bearings ………………………………………… 16Double row angular contact ball bearings ……………………………………… 16Four-point contact ball bearings ………………………………………………… 17High precision angular contact ball bearings …………………………………… 17Cylindrical roller bearings ………………………………………………………… 18High precision cylindrical roller bearings ………………………………………… 18Cylindrical roller bearings for oscillating rollers ………………………………… 19Printing cylinder bearing units (PCU) …………………………………………… 20Drawn cup needle roller bearings ………………………………………………… 21Needle roller bearings without inner ring ………………………………………… 22Needle roller bearings with inner ring …………………………………………… 23Inner rings …………………………………………………………………………… 24Spherical roller bearings …………………………………………………………… 26High precision and preloaded spherical roller bearings ………………………… 27Taper roller bearings ……………………………………………………………… 28High precision taper roller bearings ……………………………………………… 28Cam rollers ………………………………………………………………………… 29Support rollers with axial guidance ……………………………………………… 29Support rollers without axial guidance …………………………………………… 29Cam followers ……………………………………………………………………… 30

Other products………………………………………………………… 31

Application examples ………………………………………………… 36

The SKF Group – a worldwide corporation…………………………… 38

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For preferential treatment – theSKF recommended product range

To further improve customer serviceSKF has made special application-oriented selections of bearings fromthe comprehensive SKF range. Theserecommended product ranges aredirected at specific industries.

Each bearing has been carefullychosen based on the extensive experi-ence of bearing applications in theparticular industry. SKF has accumu-lated this knowledge through workingclosely with bearing users the worldover.

To meet customer demands SKF isprepared to supply any bearing. How-ever, when special bearings are re-quired in small quantities for an ap-plication, a recommended productrange item offers the chance to obtainthe optimum product at a favourableprice and with the appropriate avail-ability.

Thus, to choose a bearing from thisrecommended product range impliesadditional benefits, even for smallquantities.

Benefits of using SKFrecommended productrange bearings– Simplified bearing selection and

application design work coupledwith confidence in the suitability ofthe range offered

– Short delivery times– Long-term supply stability – Worldwide availability– No minimum order quantity– Simplified ordering and stocking

in all markets and offers a compre-hensive advisory service. The contactswith SKF engineers also serve to fur-ther improve the performance andfunctionality of bearing arrangementsin general and of printing machinebearing arrangements in particular.

Bearings for printing cylindersHighest possible precision is the mostimportant feature for bearings used forprinting cylinders. Especially for offsetprinting presses SKF suggests the useof high precision spherical roller bear-

IntroductionPrinting presses and print finishingmachines are applications with a verylarge bearing assortment portfolio.When talking about general require-ments on bearings for printing ma-chinery, the demands of each applica-tion area should be considered separ-ately.

Therefore bearings for printingpresses or print finishing machinesshould always be selected in closecooperation with SKF. SKF is present

Bearings used in printing pressesand print finishing machines

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ings with special design features orprinting cylinder bearing units basedon high precision cylindrical roller bear-ings which can also be designed aseccentric units.

For transfer cylinders in sheet fedpresses SKF offers a special taperroller bearing range to be used aslocating bearings and high precisioncylindrical roller bearings of NNU 49design for the non-locating position.

Photo: Heidelberger Druckmaschinen AG

Deep groove ball bearingsSingle row bearings can support radialand additional axial loads acting inboth directions and are suitable forhigh speed operation. The basicdesign is an open (unsealed) bearing(➔ fig 1). SKF deep groove ball bear-ings are also available with shields(non-rubbing seals), or with seals (low-friction seals and rubbing seals)(➔ fig 2) at one or both sides.

Deep groove ball bearings are usedin a large number of different applica-tions, mainly for inking, dampeningand paper guiding rollers but also inbookbinding lines, folders and otherprint finishing machines.

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Fig 1 Deep groove ball bearing (open)

Bearing with one or two shields

Fig 2 Deep groove ball bearings withshields and seals

Bearing with one or two low-friction seals

Bearing with one or two rubbing seals

Bearings for inking rollers, dampening rollers, paper guidingrollers etc.SKF offers a wide selection of deepgroove ball bearings in an open ver-sion or with shields or seals (low fric-tion and rubbing seals). For applica-tions with higher misalignments thannormal SKF offers a comprehensiverange of self-aligning ball bearingsand spherical roller bearings.

For oscillating rollers needle rollerbearings and cylindrical roller bearingsare mainly used. On top of the stand-ard assortment SKF offers a speciallydesigned range of cylindrical rollerbearings with extended inner rings.Also cylindrical roller bearings of theRNU design can be matched with innerrings which fit into the application.

Bearings for pre-press applicationsand print finishing machinesNormally standard bearings are usedfor this segment in a wide variety oftypes and sizes. In addition to highquality, availability is one of the mostimportant requirements for these products.

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Self-aligning ball bearingsSelf-aligning ball bearings have tworows of balls with a common spheredraceway in the outer ring. This gives the self-aligning property, permittingangular misalignment of the shaft rel-ative to the housing. The bearings areavailable in an open (unsealed) design (➔ fig 3) or with rubbing seals at bothsides (➔ fig 4). Self-aligning ball bear-ings are produced with a cylindricalbore as well as with a tapered bore(taper 1:12).

Due to the ability to accommodatemisalignment, self-aligning ball bear-ings are mainly used to support widerollers with high deflection.

Fig 3 Self-aligning ball bearing

Fig 4 Self-aligning ball bearing with rubbing seals

Angular contact ballbearingsSKF angular contact ball bearings areproduced in a wide variety of designsand sizes. Those commonly used inthe printing machine industry are

• single row angular contact ball bearings (➔ fig 5),

• double row angular contact ball bear-ings (➔ fig 6),

• four-point contact ball bearings (➔ fig 7), and

• high precision angular contact ballbearings (➔ fig 8).

Fig 5 Single row angular contact ball bearing

Fig 6 Double row angular contact ball bearing

Fig 7 Four-point contact ball bearing

Fig 8 High precision angular contact ball bearing

Single row angular contact ball bearingsSingle row bearings for universal match-ing are commonly used for the axialsupport of printing cylinders togetherwith printing cylinder bearing units forsupporting radial loads (➔ fig 1, page36). When using universally matchedsingle row angular contact ball bear-ings, SKF recommends the use ofmedium clearance (suffix BECBP) orlight preload (suffix BEGAP).

Double row angular contact ball bearingsDouble row angular contact ball bear-ings can accommodate heavy radialloads and axial loads acting in bothdirections. The bearings are also

Cylindrical roller bearingsSingle row bearings are produced invarious designs for heavy, purely radial loads (e.g. NU (➔ fig 10) and Ndesigns) and for additional light axialloads acting in one or both directions(e.g. NJ and NUP designs). Thesebearing designs are much used ingearing systems and power transmis-sion for printing presses.

Cylindrical roller bearings for oscillating rollersCylindrical roller bearings are alsoavailable without inner ring (RNUdesign) (➔ fig 11) and can be used to run directly on a shaft or they canbe matched with inner rings withextended width. Such bearings arebest suited for the support of oscillat-ing rollers.

Specially designed SKF cylindricalroller bearings (➔ fig 12) are usedsuccessfully for rotating and simultan-eously oscillating shafts of reciprocat-ing rollers. The bearings are designedwith extended inner ring to give therequired axial displacement. Bearingsare fitted with a polyamide cage andare mainly grease lubricated but canalso be integrated into a central oil circulating system.

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Fig 10 Cylindrical roller bearing

available as standard with shields(non-rubbing seals), and seals (rub-bing seals), at both sides (➔ fig 9).

Double row angular contact ball bear-ings are commonly used as locatingbearings for printing cylinders, in geartransmissions and in other applicationswhere the carrying capacity of deepgroove ball bearings is not enough.

Four-point contact ball bearingsFour-point contact ball bearings aresingle row angular contact ball bear-ings having raceways which are de-signed to support axial loads in bothdirections (➔ fig 7). They need lessaxial space than double row bearings.

Four-point contact ball bearings areoften used in the drive arrangementsof web and sheet fed presses togetherwith cylindrical roller bearings.

High precision angular contact ball bearingsSKF high precision angular contactball bearings (➔ fig 8) are produced inthree different dimension series – 719,70 and 72 – and are available withcontact angles of 15˚ (suffix CD) and25˚ (suffix ACD).

Bearings for universal pairing areidentified by the designation suffix Gfollowed by A, B or C for the preloadclass (e.g. 71910 ACDGA/P4A). Sets

of two bearings for universal pairingwith matched bore and outside dia-meters are also available. Dependingon preload class, these carry the designation suffix DGA, DGB,or DGC(e.g. 7006 CD/P4ADGB).

High precision angular contact ballbearings are produced as standard totolerance class P4A specifications andare used for high precision applicationssuch as printing cylinders or transfercylinders in sheet fed presses or anyother application where the highestpossible accuracy is needed.

Precision support bearings for balland roller screws (of series BSA orBSD) are also suitable for the aboveapplications. For more information seeSKF catalogue 4950 “High precisionbearings”.

Fig 9 Sealed double row angular contactball bearings

Bearing with shields at both sides

Bearing with seals at both sides

Fig 11 Cylindrical roller bearing, RNU design

Fig 12 Cylindrical roller bearing withextended inner ring

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High precision cylindrical roller bearingsCylindrical roller bearings used forthese applications have a double rowdesign based on series NNU 49 (➔ fig 13) and NN 30 (➔ fig 14). Therollers of the NNU type bearings areguided between the flanges of theouter ring whilst those of NN typebearings are guided between theflanges of the inner ring. The bearingshave a higher tolerance class thannormal (SP) and can be supplied withcylindrical bore or with tapered bore(taper 1:12). To achieve efficient lub-rication, all bearings are provided with an annular groove and lubricationholes in the outer ring (the W33 fea-ture). Cages are available in brass orpolyamide 6,6 depending on bearingsize.

High precision cylindrical rollerbearings are well suited to supportprinting cylinders of any kind, bear-ings of the NNU 49 design are oftenused in transfer cylinders of sheet fedpresses. Bearings of NN 30 designform the basis of the printing cylinderbearing units (PCU) (➔ page 9).

Fig 14 High precision cylindrical rollerbearing, series NN 30

Fig 15 Drawn cup needle roller bearing

Needle roller bearingsNeedle roller bearings incorporatecylindrical rollers which are thin andlong in relation to their diameter. Inspite of their low cross section, thebearings have a high load carryingcapacity and are thus suitable forbearing arrangements where radial space is limited.

Commonly used types are

• drawn cup needle roller bearings (➔ fig 15),

• needle roller bearings without innerring (➔ fig 16), and

• needle roller bearings with inner ring(➔ fig 17).

For applications where an adequateseal is not available or cannot be provided for space reasons, sealedneedle roller bearings can be supplied.

Needle roller bearings are widelyused in various applications in printfinishing machines. Instead of needleroller bearings, printing cylinders areincreasingly being fitted with highprecision spherical roller bearings (➔ page 10) or printing cylinder bear-ing units (PCU) (➔ page 9). The print-ing cylinder bearing units with 3 or 4rings incorporate needle roller andcage assemblies to ensure smooth(and frictionless) adjustment of theeccentric rings.

Fig 17 Needle roller bearing with inner ring

Fig 16 Needle roller bearing without inner ring

Fig 13 High precision cylindrical rollerbearing, series NNU 49

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Printing cylinder bearing units (PCU)Printing cylinder bearing units (PCU)(➔ fig 19) combine the functions ofthe separate components of the tradi-tional bearing arrangement into a compact self-contained unit. Severaldesigns are available in a range ofsizes tailored to meet the needs of theprinting press manufacturers.

They are based on high precisioncylindrical roller bearings NN 30 andare multi-row (2, 3 or 4) cylindricalroller bearings where usually the outerring is replaced by an eccentric ring.Some designs have one or two eccent-ric intermediate rings (➔ fig 20), eachsupported by a double row needle

Fig 18 Inner ring

Fig 19 Printing cylinder bearing unit (PCU)

Fig 20 Some printing cylinder bearing units have one or two eccentric intermediate rings,each supported by a double row needle roller and cage assembly

Inner ringsSKF also supplies loose inner rings (➔ fig 18) for use with needle rollerbearings or cylindrical roller bearingswithout inner ring in cases where theshaft cannot be hardened and ground.It is also possible to use extendedinner rings in order to permit largeraxial displacements of the shaft relat-ive to the housing or to provide idealriding surfaces for the lips of seals.

roller and cage assembly. The outer-most ring is usually cylindrical.

The units are designed to facilitatethe adjustment of printing cylinders inoffset presses required during printingpress operation. They can also be usedfor other printing technologies than off-set as well as for any other applicationwhere eccentricity is needed.

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Taper roller bearingsThe standard bearings are single rowbearings for heavy radial and simultan-eously acting heavy single directionaxial loads (➔ fig 22). Two bearings onthe shaft are adjusted against eachother in order to give clearance orpreload, depending on the require-ments of the application.

SKF offers a special tailored rangeof high precision taper roller bearingsfor printing cylinders or transfer cylin-ders in sheet fed presses (➔ fig 23).These special bearings are based ondouble row taper roller bearings withthe roller rows arranged back-to-back.The bearings are preloaded in opera-tion and the running accuracy is to tolerance class P4.

Fig 22 Taper roller bearing

Spherical roller bearingsThese are double row bearings, whichare self-aligning and consequentlyinsensitive to errors of alignment of theshaft relative to the housing and toshaft bending (➔ fig 21). In addition toradial loads, the bearings can alsoaccommodate axial loads acting inboth directions.

Spherical roller bearings with nor-mal tolerances are used in the powertransmission of printing presses or tosupport wide rollers with high deflec-tion.

SKF offers high precision, preload-ed spherical roller bearings for printingcylinder applications. These bearingsare identified by the designation suf-fixes VA751, VA759 and VAB.

Besides this special range there isanother earlier range of special bear-ings for printing cylinders identified by six-figure drawing numbers (e.g.453538). They are still used in severalmarkets.

Fig 21 Spherical roller bearing Fig 23 Special taper roller bearing

SKF Explorer – new performanceclass for spherical roller bearingsDevelopments in material and heattreatment, manufacturing process andbearing design have resulted in a newspherical roller bearing, known asExplorer. The new Explorer sphericalroller bearings outlast all other spher-ical roller bearings, including the pre-vious SKF bearings. To pass on thebenefits of the several times longer lifeto users, the calculation methods forlife prediction have been modified. For more information about theExplorer spherical roller bearings, see SKF publication 4401.

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Track runner bearingsTrack runner bearings having a par-ticularly thick-walled outer ring, canaccommodate heavy as well as shockloads. They are ready-to-mount units,for all types of printing presses andpaper handling systems, and arewidely used in the postpress sectionfor folders, cutters, gathering ma-chines, book manufacturing lines andother applications.

Commonly used types are

• cam rollers, wide design (➔ fig 24),• support rollers (➔ fig 25), and• cam followers (➔ fig 26).

Fig 24 Cam roller, wide design Fig 25 Support roller Fig 26 Cam follower

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Recommended product rangematrices and tables

The bearings included in this recom-mended product range are presentedin the same bearing type order as inthe SKF General catalogue or SKFInteractive Engineering Catalogue.They are shown in Dimension Seriesorder (light section series to the left,heavy to the right).

Bearing designationsThe matrix headings show bearingdesignations without the size figures.A darker coloured square indicatesthe position for the size where appro-priate.

Designation suffixesThe following designation suffixes willbe found in the matrices.

A Deviating or modified internaldesign with same boundarydimensions. As a rule the sig-nificance of the letter is boundto the particular bearing orbearing series

ACD Single row angular contact ballbearing, optimised internaldesign, 25° contact angle

ADA Wide snap ring grooves in theouter ring; two-part inner ringheld together by a retainingring

AS Needle roller bearing with lub-rication hole(s) in outer ring. A figure following the AS indic-ates the number of holes

B Deviating or modified internaldesign with same boundarydimensions

BE Single row angular contact ballbearing with 40° contact angleand optimised internal design

BEP Single row angular contact ballbearing with 40° contact angleand optimised internal design,with moulded cage of glassfibre reinforced polyamide 6,6

C Deviating or modified internaldesign with same boundarydimensions. As a rule the sig-nificance of the letter is bound to the particular bearing

CA Spherical roller bearing of C design, but with retainingflanges on inner ring andmachined cage

CB Single row angular contact ballbearing for universal pairing inback-to-back, face-to-face ortandem arrangement. Whenarranged back-to-back or face-to-face there will be Normalclearance

CC Spherical roller bearing of Cdesign but with enhanced rollerguidance and correspondinglyreduced friction

CD Single row angular contact ballbearing, optimised internaldesign, 15° contact angle

CL7A Previous standard taper rollerbearing quality for pinion bear-ing arrangements

CL7C Current standard taper rollerbearing quality for pinion bear-ing arrangements

C3 Bearing internal clearancegreater than Normal

DB Two single row deep grooveball bearings, single row angu-lar contact ball bearings or single row taper roller bearingsmatched for mounting in aback-to-back arrangement; theletter(s) following the DB indic-ate the magnitude of the axialinternal clearance or preload inthe bearing before mounting;for paired taper roller bearingsthe design and arrangement ofthe intermediate rings betweenthe inner and/or outer rings areidentified by a two-figure num-ber which follows immediatelyafter DB A Light preload (angular

contact ball bearings) B Preload greater than A

(angular contact ball bear-ings)

GA Light preload (deepgroove ball bearings)

GB Preload greater than GA

DG Two single row angular contactball bearings for universal pair-ing, i.e. paired for mounting ina back-to-back, face-to-face ortandem arrangement; supple-mentary designations for axialinternal clearance and preloadare explained under DB

E Deviating or modified internaldesign with same boundarydimensions; as a rule the sig-nificance of the letter is boundto the particular bearing orbearing series; usually indic-ates reinforced rolling elementcomplement

EC Optimised internal design

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GA Single row angular contact ballbearing for universal pairing ina back-to-back or face-to-facearrangement; when mountedthe bearing pair will have aslight preload

GB Single row angular contact ballbearing for universal pairing ina back-to-back or face-to-facearrangement; when mountedthe bearing pair will have apreload greater than GA

J Pressed steel cage, unhard-ened; different designs ormaterials are identified by a figure , e.g. J2

K Tapered bore, taper 1:12 ondiameter

K30 Tapered bore, taper 1:30 ondiameter

2LS Rubbing seals of nitrile rubber(NBR) at both sides of bearing

M Machined brass cage; differentdesigns or materials are identi-fied by a figure, e.g. M2

MA Machined brass cage, outerring centred

P Moulded glass fibre reinforcedpolyamide 6,6 cage

PP Nitrile rubber rubbing seals atboth sides of track runnerbearing

PPA Thrust washers of polyamide6,6 with seal lip at both sidesof track runner bearing

P4A Dimensional accuracy to ISOtolerance class 4 and runningaccuracy to ABMA toleranceclass ABEC 9

Q Optimised internal geometryand surface finish of taperroller bearings

RS Rubbing seal of nitrile rubberat one side of bearing (needleroller bearings)

RS1 Rubbing seal of nitrile rubberwith sheet steel reinforcementat one side of bearing

RZ Low-friction rubbing seal ofnitrile rubber with sheet steelreinforcement at one side ofbearing

2RS RS seal at both sides of bear-ing (needle roller bearing)

2RS1 RS1 seal at both sides of bear-ing

2RZ RZ seal at both sides of bear-ing

SP Special tolerance class formachine tool spindle bearings;dimensional accuracy approx-imately to ISO tolerance class5 and running accuracy approx-imately to ISO tolerance class 4

TN Moulded cage of plastic; differ-ent designs or materials areidentified by a figure followingthe TN Example: TN9 Moulded cageof glass fibre reinforced poly-amide 6,6

VAB High precision and preloadedspherical roller bearings

VA751 High precision and preloadedspherical roller bearings

VA759 High precision and preloadedspherical roller bearings

W33 Annular groove and three lub-rication holes in outer ring

X 1. Boundary dimensionsaltered to conform to ISOstandards

2. Cylindrical runner surface

2Z Z shield at both sides of thebearing

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See SKF General Catalogue 4000 or SKF Interactive Engineering Catalogue for more detailed specifications

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High precision angular contactball bearingsSee SKF catalogue 4950 “High precision bearings”for more detailed specifications

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Cylindrical roller bearings

See SKF General C atalogue 4000 or SKF Interactive Engineering Catalogue for more detailed specifications

High precision cylindricalroller bearings

See SKF catalogue 4950 “High precision bearings” or SKF Interactive Engineering Catalogue for more detailed specifications

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Cylindrical roller bearingsfor oscillating rollers

Cylindrical roller bearingsfor oscillating rollers

For more detailed specifications please contact thenearest SKF application engineering service


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Designation Principal dimensions

d D C B

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BC1-0190 45 75 16 50BC1-0043 55 100 21 45BC1-0318 55 100 21 59


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– mm

RNU 206 ECP 37,5 62 16RNU 1007 ECP 42 62 14RNU 207 ECP 44 72 17RNU 208 ECP 49,5 80 18RNU 1009 ECP 52,5 75 16RNU 2210 ECP 59,5 90 23RNU 211 ECP 66 100 21

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Printing cylinder bearing units (PCU)

See SKF brochure Dd 7977 “The new printing performance standard” for more detailed information

Design 1 Design 2 Design 3 Design 4 Design 5

Dimensions Designation Design Taper

d D B B1/B2 C e1/e2

mm – – –

Design 1 and 2

50 105 23 40 –/– BC2-7139 1 1:12

65 125 53 65,1 –/– BC4B 326624 1 1:30130 40 55 –/– BC3-0004 A 1 1:30130 40 55 10/– BC3-0005 A 2 1:30

95 185 65 95 –/– BC3-7014 1 1:30185 65 95 12,7/– BC3-7013 2 1:30

105 200 60 80 –/– BC3-0001 B 1 1:30

120 273,05 46 80 4,76/– BC2-7171 1 1:12

170 235 78 88 –/– BC4-7046 1 1:30

Design 3, 4 and 5

50 120 23 50/– 43 6/– BVT-7013 3 1:12

65 142 53 65,1/– 52 3,5/– BVTB 326625 C 3 1:30142 53 65,1/– 52 3,5/– BVTB 326625 CC 3 1:30142 53 65,1/– 52 3,5/– BVTB 326625 CD 3 1:30

150 40 55/– 48 10/– BCT-0003 A 3 1:30150 53 65,1/– 52 7/– BVTB 326627 AA 3 1:30160 36 56/– 52 16/– BVT-7026 3 1:12

180 40 88,5/– 60,5 12/7 BVT-7030 A 3 1:30205 53 65,1/59,5 52 7/14 BVNB 326628 A 5 1:30205 53 65,1/59,5 52 3,5/14 BVNB 326626 C 5 1:30

75 180 48 60/– 52 12,7/– BCT-0004 A 3 –205 48 60/– 52 24/– BCT-0005 A 3 –

95 205 65 95/– 58 12,7/– BVT-7029 A 3 1:30

105 240 60 80/– 68 12,7/0,5 BCT-7002 D 4 1:30

120 273,05 46 80/– 68 12,7/– BVT-7044 3 1:12

170 310 78 88/– 66 12/– BCT-7001 3 1:30

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21

Drawn cup needle roller bearings

See SKF catalogue 4703 “Needle roller bearings” or SKF InteractiveEngineering Catalogue for more detailed specifications

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Needle roller bearings without inner ring

See SKF catalogue 4703 “Needle roller bearings” or SKF Interactive Engineering Catalogue for more detailed specifications

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Needle roller bearings with inner ring


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26

Spherical roller bearings

See SKF product brochure 4401 “SKF spherical roller bearings” or SKF Interactive Engineering Catalogue formore detailed specifications

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High precision and preloaded spherical roller bearings

For more detailed specifications please contact the nearest SKF application engineering service

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– mm

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28

Taper roller bearings


High precision taper roller bearings


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– mm

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29

See SKF General Catalogue 4000 or SKFInteractive Engineering Catalogue for moredetailed specifications

Cam rollers Support rollerswith axial guidanceSee SKF catalogue 4703 “Needle roller bearings” or SKF Interactive Engineering Catalogue formore detailed specifications

Support rollerswithout axial guidanceSee SKF catalogue 4703 “Needle rollerbearings” or SKF Interactive EngineeringCatalogue for more detailed specifications

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Cam followers

See SKF catalogue 4703 “Needle roller bearings” or SKF Interactive Engineering Catalogue for moredetailed specifications

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31

Other productsBesides the products included in this recom-mended product range, SKF also offers a comprehensive assortment of plain bearings,seals, linear motion products as well as tools,measuring equipment and lubricants. For ad-vanced printing cylinder applications SKF canalso offer a tailored range of precision spindles.Detailed information on these products will befound in special publications which will be supplied on request.

32

Plain bearingsSpherical plain bearings and rod endsin various designs and with variouscombinations of sliding contact sur-faces. Dry sliding bushings of variouscomposite materials.

See SKF Interactive EngineeringCatalogue.

SealsIn a variety of designs and executionsfor applications in all sectors of industry

– radial shaft seals– mechanical seals– V-ring seals– axial clamp seals– sealing and spacing washers

See SKF catalogue 4006 “CR seals” orSKF Interactive Engineering Catalogue.

33

Linear ball bearingsA full range of bearings as well asappropriate accessories such as hous-ings, shafts and shaft supports.

For more details please contact yourlocal SKF Linear Motion representative.

Precision rail guidesWith ball, cylindrical roller or needleroller and cage assemblies for limitedand unlimited travel.


Ball and roller screwsIn a variety of designs for positioningmovements where there are high orvery high demands for accuracy.


34

Gauges and monitoring equipmentFor tapered shafts, accurate mountingof high precision bearings and formonitoring of machines.

See SKF catalogue MP 201“Maintenance Tools and Lubricants”.

Mounting and dismounting equipmentLarge range of tools for mounting anddismounting mechanically, by the SKFoil injection method and by heating.


GreasesSpecialist bearing greases in a widerange of package sizes.


35

Precision spindlesSKF manufactures a wide range ofspindles that are fully engineered tomeet the needs of many precisionapplications. Quick availablity andrugged performance allow the de-signer to select the right spindle for a particular application.

SKF spindles come in a wide rangeof designs, either belt-driven or motor-ised, and are available as cartridge orrectangular units. SKF can alsoprovide special spindles tailored tospecific customer requirements.

For more details please contact yourlocal SKF representative.

36

Fig 1 Arrangement with printing cylinder bearing units (PCU), high precision lock nuts, matched single row angular contact ballbearings and needle roller bearings

Application examples

37

Fig 2 Oscillating inking rollerOscillating roller of inking system fitted with a cylindrical roller bearing with extended inner ring

Fig 3 Inking rollerBearing arrangement of an inking roller using deep groove ballbearings with seals on both sides

Fig 4 Transfer cylinderTaper roller bearing in the locating arrangement of a transfer cylinder in a sheet fed press

Fig 5 Transfer cylinderHigh precision cylindrical roller bearing in the non-locatingarrangement of a transfer cylinder in a sheet fed press

38

development has also played a vitalrole, resulting in many examples ofepoch-making innovations.

The business of the Group consistsof bearings, seals, special steel and acomprehensive range of other high-tech industrial components. The experi-ence gained in these various fieldsprovides SKF with the essential know-ledge and expertise required in orderto provide the customers with the mostadvanced engineering products andefficient service.

SKF is an international industrial Groupoperating in some 130 countries and isworld leader in bearings.

The company was founded in 1907following the invention of the self-align-ing ball bearing by Sven Wingquist and,after only a few years, SKF began toexpand all over the world.

Today, SKF has some 40 000 em-ployees and around 80 manufacturingfacilities spread throughout the world.An international sales network includesa large number of sales companies andsome 7 000 distributors and retailers.Worldwide availability of SKF productsis supported by a comprehensive technical advisory service.

The key to success has been a con-sistent emphasis on maintaining thehighest quality of its products and services. Continuous invest-ment in research and

The SKF Group– a worldwide corporation

39

SKF has developed the Channel concept infactories all over the world. This drasticallyreduces the lead time from raw material toend product as well as work in progress and finished goods in stock. The conceptenables faster and smoother informationflow, eliminates bottlenecks and bypassesunnecessary steps in production. TheChannel team members have the know-ledge and commitment needed to share theresponsibility for fulfilling objectives in areassuch as quality, delivery time, productionflow etc.

The SKF Group is the first major bearingmanufacturer to have been granted approvalaccording to ISO 14001, the internationalstandard for environmental managementsystems. The certificate is the most com-prehensive of its kind and covers more than60 SKF production units in 17 countries. The SKF Engineering & Research Centre

is situated just outside Utrecht in TheNetherlands. In an area of 17 000 squaremetres (185 000 sq.ft) some 150 scientists,engineers and support staff are engaged inthe further improvement of bearing peform-ance. They are developing technologiesaimed at achieving better materials, betterdesigns, better lubricants and better seals – together leading to an even better under-standing of the operation of a bearing in itsapplication. This is also where the SKF LifeTheory was evolved, enabling the design of bearings which are even more compact and offer even longer operational life.

SKF manufactures ball bearings, roller bearings and plain bearings. The smallestare just a few millimetres (a fraction of aninch) in diameter, the largest several metres.SKF also manufactures bearing and oilseals which prevent dirt from entering and lubricant from leaking out. SKF’s subsidiaries CR and RFT S.p.A. are amongthe world’s largest producers of seals.

®

© Copyright SKF 2000The contents of this publication are thecopyright of the publisher and may notbe reproduced (even extracts) unlesspermission is granted. Every care hasbeen taken to ensure the accuracy ofthe information contained in this pub-lication but no liability can be acceptedfor any loss or damage whether direct,indirect or consequential arising out ofthe use of the information containedherein.

Publication 4781 E

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