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SNL plummer block housings - SKF

SNL plummer block housings solve housing problems Contents The SKF brand now stands for more than ever before, and means more A Product information C Product data to you as a valued customer. 3 Fewer bearing replacements and less 50 Designations and housing data maintenance general While SKF maintains its leadership as a 3 plummer block housings have much 50 Designations high-quality bearing manufacturer to offer 50 Load carrying ability throughout the world, new dimensions 3 SNL plummer block housings have in technical advances, product support more to offer 56 Product tables and services have evolved SKF into a 4 One basic design many variants 56 SNL plummer block housings truly solutions-oriented supplier, 6 Features and benefits for bearings on an adapter sleeve, creating greater value for customers. 8 Superior performance in all sectors metric shafts 68 SNL plummer block housings These solutions enable customers to for bearings on an adapter sleeve, improve productivity, not only with breakthrough application-specific prod- B Recommendations inch shafts 84 SNL plummer block housings for ucts, but also through leading-edge 10 Bearing arrangement design bearings with a cylindrical bore design simulation tools and consultancy 10 Bearings on adapter sleeves on straight 94 Sealing arrangements for SNL plummer services, plant asset efficiency mainte- shafts block housings nance programmes, and the industry's 11 Bearings on adapter sleeves on stepped most advanced s

ing ball bearings, spherical roller bearings and CARB toroidal roller bearings of ISO Dimen-sion Series 02, 03, 22, 23 and 32. They can often be fitted with a number of different seals. Many designs and variants of split plummer block housings are available, making the use of tailored housings unnecessary and

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Transcription of SNL plummer block housings - SKF

1 SNL plummer block housings solve housing problems Contents The SKF brand now stands for more than ever before, and means more A Product information C Product data to you as a valued customer. 3 Fewer bearing replacements and less 50 Designations and housing data maintenance general While SKF maintains its leadership as a 3 plummer block housings have much 50 Designations high-quality bearing manufacturer to offer 50 Load carrying ability throughout the world, new dimensions 3 SNL plummer block housings have in technical advances, product support more to offer 56 Product tables and services have evolved SKF into a 4 One basic design many variants 56 SNL plummer block housings truly solutions-oriented supplier, 6 Features and benefits for bearings on an adapter sleeve, creating greater value for customers. 8 Superior performance in all sectors metric shafts 68 SNL plummer block housings These solutions enable customers to for bearings on an adapter sleeve, improve productivity, not only with breakthrough application-specific prod- B Recommendations inch shafts 84 SNL plummer block housings for ucts, but also through leading-edge 10 Bearing arrangement design bearings with a cylindrical bore design simulation tools and consultancy 10 Bearings on adapter sleeves on straight 94 Sealing arrangements for SNL plummer services, plant asset efficiency mainte- shafts block housings nance programmes, and the industry's 11 Bearings on adapter sleeves on stepped most advanced shafts supply management techniques.

2 12 Bearings on withdrawal sleeves on stepped shafts D Additional information The SKF brand still stands for the very 13 Bearings on cylindrical seats on stepped 100 Other products for trouble-free best in rolling bearings, but it now shafts operation stands for much more. 14 Standard seals 100 High-performance, self-aligning 21 Special seals standard bearings SKF the knowledge engineering 22 End covers 101 For easy mounting adapter and company 22 Locating rings withdrawal sleeves 24 Axial displacement using CARB toroidal 102 Other products roller bearings in SNL housings 103 Other bearing housings 104 Condition monitoring equipment 26 Application advice for trouble-free operation 106 SKF the knowledge engineering 28 Lubrication company 32 Mounting 36 Mounting SNL housings with four-lip seals 38 Mounting SNL housings with double-lip seals 40 Mounting SNL housings with V-ring seals 42 Mounting SNL housings with felt seals 44 Mounting SNL housings with labyrinth seals 43 Mounting SNL housings with taconite seals 48 Mounting SNL housings with oil seals 2.

3 Fewer bearing replacements A. and less maintenance plummer block housings SNL plummer block have much to offer housings have more The main benefit of split plummer block to offer housings is their easy installation; preassem- bled shafts can be mounted in them. When SKF has developed the SNL plummer block the housing bases are attached to the base housings to be the first choice for design, plate, it is then only necessary to place the quality and economy. This enables customers housing caps in position and to tighten the to keep a step ahead. attachment bolts to complete the installation. SNL plummer block housings enable the full Split plummer block housings available on service life potential of the incorporated bear- the market are mainly intended for self-align- ings to be exploited with less need for main- ing ball bearings, spherical roller bearings and tenance. This supports user's efforts to further CARB toroidal roller bearings of ISO Dimen- reduce maintenance costs. Among other sion Series 02, 03, 22, 23 and 32.

4 They can characteristics, the housings are very stiff, often be fitted with a number of different making them insensitive to uncontrolled and seals. Many designs and variants of split excessive tightening of the attachment bolts. plummer block housings are available, making Another benefit is the wide range of different the use of tailored housings unnecessary and types of standard seals to be fitted in the SNL. thus enabling cost-effective bearing arrange- plummer block housings . ments to be made. For many years SKF has been one of the leading producers of split plummer block housings synonymous with operational reliability, quality and versatility. 3. One basic design many Several sealing options An important advantage of the SNL plummer variants block housings is that they can be fitted with SNL plummer block housings are primarily a variety of seals. Standard SKF seals include intended for self-aligning ball bearings, spher- four-lip seals, V-ring seals, felt seals, labyrinth ical roller bearings and CARB toroidal roller seals and heavy-duty taconite labyrinth seals bearings.

5 The housings are designed on the with a radial labyrinth and end covers. Other building block principle to enable a wider standard seals are also available for SNL. choice of bearings and seals as well as a variety housings , but the housing has to be modified of mounting and lubrication methods. for the seal to be effective. These include oil seals and heavy-duty taconite labyrinth seals with an axial labyrinth. A building block system SNL plummer block housings are dimen- The SKF assortment of SNL plummer block sionally interchangeable with the earlier SNH. housings can accommodate shafts ranging housings . Their dimensions conform to from 20 to 160 mm in diameter. These hous- ISO 113:1999. ings, which all share the same design features, are available with a variety of seals. The standard range also includes a number of options, like tapped holes for grease fittings and condition monitoring sensors, to create an almost limitless combination of variants. housings are also available for bearings for larger shaft diameters ( page 103).

6 SNL plummer block housings are made of high quality, grey cast iron to provide high tensile strength. For applications where add- itional strength is required, housings made of spheroidal graphite cast iron are available. SNL plummer block housing with sealing options 4. A. 5. Features and benefits The SKF assortment of SNL plummer block housings is characterized by a number of advantages, including high load carrying capacity and machining quality. In addition, SNL housings incorporate unique features that are designed to improve the performance and increase the service life of your application. Stiff design Excellent heat conduction The housing base is reinforced with ribs and extra Additional ribs on the underside of the base improve material around the attachment holes to add strength heat flow from the bearing outer ring to the support and prevent deformation of the base. The attachment surface. Bearings in an SNL housing run 5 10 %. bolts can be preloaded to locate the housing and cooler than the bearings in other housings .

7 Prevent deformation of the housing base and bore. Grease guiding system Caps and bases individually marked Relubrication made simple When lubricating from the top, this feature The housing base and cap are matched during man- Standard SNL housings have two tapped holes in the guides fresh grease from the fitting to the side ufacture and are not interchangeable with the caps cap for the grease fitting. They are protected by plas- of the bearing. This applies in particular for and bases of other housings . To prevent any mis- tic plugs. The location of the grease fitting is deter- lubricating self-aligning ball bearings and matches, a unique serial number is marked on both mined by the bearing. If the bearing has a W33. CARB bearings. the housing cap and base. groove, install the fitting in the middle of the housing. Otherwise, put the fitting in the other hole so that grease will enter the bearing from the side. Stiff design Insensitive to over-tightening of the attachment bolts Excellent heat Lowers bearing operating temperature dissipation Extends relubrication intervals Increases the service life of the bearings, seals and lubricant Drilled and tapped holes Relubrication facility as standard for grease fittings Caps and bases Avoids mixing caps and bases, enables traceability individually marked Dimples cast into Enables quicker adaptation of a standard housing to an application the housing to identify drilling locations Simple mounting Centre lines are cast into the housing base to simplify the alignment process Additional seals Several sealing options, to extend bearing service life in harsh operating environment Grease guiding system Guides grease directly to the side of the bearing 6.

8 A. Dimples to locate accessories Simple mounting High speed seal SNL housings have dimples cast into the housing cap To simplify mounting and make alignment more The SKF four-lip, low friction seal was developed to show where condition monitoring sensors can be accurate, lines indicating the centre of the bore and specifically for SNL housings . This highly effective mounted for maximum effectiveness. the centre of the base are cast into the housing. seal, which can accommodate speeds up to 13 m/s, Mounting instructions, included with each seal pack, is easy to remove and install. provide valuable installation tips. 7. Superior performance Another reason why SKF housings are so popular is because knowledgeable consumers in all sectors know that high quality components can sig- High load carrying capacity, robust design, nificantly reduce operating costs that accurately machined surfaces and simplified includes everything from maintenance, energy installation make SKF housings the first choice consumption, lubricant consumption and for machine manufacturers and end users.

9 Downtime. Applications Customer demands Solution Mine ventilators Robust design Exhaust and fresh air fans No breakdowns Flue gas fans Extremely effective seals Emergency power supply generator Long maintenance intervals flywheels Condition monitoring facilities Transmissions Fast and easy mounting and Belt drives dismounting Impact and hammer mills 8. A. 9. Bearing arrangement design SNL plummer block housings are typically 1. Bearings on adapter Applications used with self-aligning ball bearings, spher- Bearing arrangements for relatively long ical roller bearings or CARB toroidal roller sleeves on straight shafts shafts where more than two bearings are bearings fitted on straight or stepped shafts; required for support. the bearings can be mounted on adapter or Advantages Bearing arrangements where machine withdrawal sleeves or directly on cylindrical Drawn round bar (tolerance h9) can be components are mounted using wedging shaft seats. These housings can also be used used without machining.

10 Or tensioning components that do not with other bearing types if they are within the Maximum shaft strength as there is no require the shaft to be machined. correct Dimension Series. weakening by shoulders or reliefs. Bearing arrangements where the final Bearings can be mounted at any position position of the bearing cannot be accurately on the shaft. determined. Mounting force, the force required to drive the bearing onto the sleeve, is 40 %. less than with other shafts because there is only one sliding surface. Bearing radial clearance can be adjusted (within limits) during mounting to meet application demands. Bearings on adapter sleeves on straight shafts SNL 5 SNL 6. 12 EK 22 EK 222 EK BS2-22-2 CSK 232 CCK C 22 K C 32 K 13 EK 23 EK 213 CCK 223 EK C 23 K. 10. 2. Bearings on adapter sleeves on stepped shafts Advantages The bearing position on the shaft is accur- ately determined by the abutment ring. B. Other components on the shaft can be axially located by the bearing on its sleeve via spacer sleeves.


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