Skf Snl Plummer

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Text of Skf Snl Plummer

  • SNL plummer block housings solve the housing problemsRevised edition

    www.bergab.ru skf@bergab.ru . (495)-228-06-21, (495) 223-3071

  • Contents

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    1 Product information.................................................. 3Fewer bearing replacements and less maintenance... 3Plummer block housings have much to offer ................ 3SNL plummer block housings have more to offer ......... 3One basic design many variants................................ 4Costs and risks at a low level .................................... 6High performance for all sectors................................... 8

    2 Recommendations.................................................... 10Bearing arrangement design ....................................... 10Bearings on adapter sleeves on smooth shafts............ 10Bearings on adapter sleeves on stepped shafts........... 11Bearings on withdrawal sleeves on stepped shafts ...... 12Bearings on cylindrical seatings on stepped shafts ...... 13Standard seals.............................................................. 14Special seals................................................................. 21End covers.................................................................... 22Locating rings ............................................................... 22Axial displacement using CARB bearings in SNL housings................................................................ 24

    Application advice for trouble-free operation............ 26Lubrication .................................................................... 28Mounting ....................................................................... 30Mounting SNL housings with double-lip seals .............. 34Mounting SNL housings with V-ring seals .................... 36Mounting SNL housings with felt seals ......................... 38Mounting SNL housings with labyrinth seals ................ 40Mounting SNL housings with taconite seals ................. 42Mounting SNL housings with oil seals .......................... 44

    3 Product data .............................................................. 46Designations and housing data .................................. 46Designations ................................................................. 46Load carrying ability ...................................................... 47

    Product tables............................................................... 50SNL plummer block housings for bearings on adapter sleeve ......................................................... 50SNL plummer block housings for bearings with cylindrical bore....................................................... 62Sealing arrangements for SNL plummer block housings.. 72

    Other products for trouble-free operation.................. 76

    SKF The knowledge engineering company............. 82

    The SKF brand now stands for more than ever before, and means more to you as a valued customer.

    While SKF maintains its leadership as the hallmark of quality bearings throughout the world, new dimensions in technical advances, product support and services have evolved SKF into a truly solutions-oriented supplier,creating greater value for customers.

    These solutions encompass ways to bring greater productivity to customers, not only with breakthrough application-specific products, but also through leading-edge design simulation tools and consultancy services,plant asset efficiency maintenance programs, and theindustrys most advanced supply management techniques.

    The SKF brand still stands for the very best in rolling bearings, but it now stands for much more.

    SKF The knowledge engineering company

    www.bergab.ru skf@bergab.ru . (495)-228-06-21, (495) 223-3071

  • 1 Product information 2 Recommendations 3 Product dataCustomer benefits Page ............. 10 Page ............. 46

    Fewer bearing replacements and less maintenance

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    Plummer block housingshave much to offerThe main benefit of split plummerblock housings is their easy installation;pre-assembled shafts can be mountedin them. When the housing bases areattached to the base plate it is thenonly necessary to place the housingcaps in position and to tighten the attachment bolts to complete theinstallation.

    Split plummer block housings avail-able on the market are mainly intendedfor self-aligning ball bearings, sphericalroller bearings and CARB bearings ofISO Dimension Series 02, 03, 22, 23and 32. They can often be fitted withvarious different seals. Many designsand variants of split plummer blockhousings are available making the useof tailored housings unnecessary andthus enabling cost effective bearingarrangements to be made.

    For many years SKF has been oneof the leading producers of split plum-mer block housings synonymouswith operational reliability, quality andversatility.

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    SNL plummer blockhousings have more toofferSKF has developed the SNL plummerblock housings to be the first choicefor design, quality and economy. Thisenables customers to keep a stepahead.

    SNL plummer block housings enablethe full service life potential of the in-corporated bearings to be exploited

    with less need of maintenance. Thissupports user efforts to further reducemaintenance costs. Among other char-acteristics the housings are very stiff,making them insensitive to uncon-trolled and excessive tightening of theattachment bolts.

    Another benefit is the choice of oil or grease lubrication for the bearingshoused in SNL plummer blocks. Arange of efficient seals for oil lubrica-tion and rough environments make fortrouble-free operation.

    www.bergab.ru skf@bergab.ru . (495)-228-06-21, (495) 223-3071

  • Several sealing optionsAn important advantage of the SNLplummer block housings is that theycan be fitted with a variety of seals.The standard seals supplied by SKFcomprise double-lip seals, V-ringseals, felt seals, labyrinth seals andheavy-duty taconite seals as well asend covers. Other standard seals arealso available for SNL housings, butthese are supplied together with thehousings as the housing has to bemodified to take them. These are oilseals and heavy-duty axial taconiteseals.

    SNL plummer block housings arefully interchangeable with the earlierSNH housings. Their dimensions conform to ISO 113:1994.

    Painting systemSNL plummer block housings arepainted as standard in accordancewith ISO 12944-2, environmentalClass C2. Black colour: RAL 9005.

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    One basic design many variantsSNL plummer block housings are pri-marily intended for self-aligning ballbear-ings, spherical roller bearings andCARB bearings. The housings aredesigned on a building block principle.This enables a more generous choiceof bearing, shaft mounting, seals andtype of lubrication. Stocking is alsosimplified.

    A building block systemThe basis of the SNL plummer blockhousing system consists of a numberof housings of the same design but indifferent sizes. By combining thesehousings with the different standardseals a wide variety of housing variants,all belonging to the standard range, canbe supplied to cover the majority ofdemands for plummer blocks for shaftshaving diameters of 20 to 160 mm,inclusive. The standard range alsocovers other variants, for example,housings with drilled and tapped holesfor lubrication nipples or conditionmonitoring sensors. Housings are alsoavailable for bearings for larger shaftdiameters ( page 79).

    SNL plummer block housings aremade of grey cast iron and demon-strate high strength. Should, however,this strength be inadequate, dimen-sionally equivalent plummer blockhousings of spheroidal graphite castiron can be supplied.

    SNL plummerblock housing withsealing options

    1 Product information 2 Recommendations 3 Product dataCustomer benefits Page ............. 10 Page ............. 46

    www.bergab.ru skf@bergab.ru . (495)-228-06-21, (495) 223-3071

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    1 Product information 2 Recommendations 3 Product dataCustomer benefits Page ............. 10 Page ............. 46

    www.bergab.ru skf@bergab.ru . (495)-228-06-21, (495) 223-3071

  • 61 Product information 2 Recommendations 3 Product dataDesign characteristics Page ............. 10 Page ............. 46

    Stiff design Insensitive to uncontrolled tightening of the attachment bolts, low operating temperatures

    Excellent heat Low bearing temperatures, high speed operation conduction possible with oil lubrication, long relubrication

    intervals, long service life, low lubricant consumption

    Drilled and tapped Relubrication facility as standardhole with nipple

    Caps and bases Avoids mixing of caps and bases, permits traceabilityindividually marked

    Indications for holes to Simple and easy adaptation of standard housing to take other components individual applications, easy attachment of condition

    monitoring equipment

    Simple mounting Simple and reliable mounting and maintenance

    Additional seals Several sealing options, long bearing service lives

    Costs and risks at a low levelSNL plummer block housings haveseveral advantages, such as the highload carrying capacity and machiningquality as well as the wide variety ofsealing alternatives with the followingdesign and performance characteristics.

    Stiff designThe housing base is reinforced with ribsand extra material surrounding the holes for the attachment bolts in order to provideimproved seating on the base plate. Theattachment bolts can be preloaded to givecorrect location and prevent deformation of the housing base and bore.

    S27

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    S27

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    Excellent heat conductionThe web (rib) reinforcement of the housingbase enlarges the contact area betweenbase and base plate and allows for animproved heat flow from the bearing outerring to the base plate. The be

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