SNL plummer block housings solve the housing …

1 SNL plummer block housings solve the housing problems Revised edition Contents Made by SKF stands for excellence. It symbolises 1 Product 3. our consistent endeavour to achieve total quality in Fewer bearing replacements and less 3. everything we do. For those who use our products, plummer block housings have much to offer .. 3. Made by SKF implies three main benefits. SNL plummer block housings have more to offer .. 3. One basic design many 4. Reliability thanks to modern, efficient products, Costs and risks at a low level .. 6. based on our worldwide application know-how, optim- High performance for all sectors .. 8. ised materials, forward-looking designs and the most advanced production techniques. 2 Recommendations .. 10. Cost effectiveness resulting from the favourable ratio Bearing arrangement design .. 10. between our product quality plus service facilities, and Bearings on adapter sleeves on smooth shafts.

2 10. the purchase price of the product. Bearings on adapter sleeves on stepped shafts .. 11. Bearings on withdrawal sleeves on stepped shafts .. 12. Market lead which you can achieve by taking Bearings on cylindrical seatings on stepped shafts .. 13. advantage of our products and services. Increased Standard seals .. 14. operating time and reduced down-time, as well as Special 21. improved output and product quality are the key to End covers .. 22. a successful partnership. Locating rings .. 22. Axial displacement using CARB bearings in SNL 24. Application advice for trouble-free 26. Lubrication .. 28. Mounting .. 30. Mounting SNL housings with double-lip seals .. 34. Mounting SNL housings with V-ring seals .. 36. Mounting SNL housings with felt seals .. 38. Mounting SNL housings with labyrinth seals .. 40. Mounting SNL housings with taconite seals.

3 42. Mounting SNL housings with oil seals .. 44. 3 Product data .. 46. Designations and housing data .. 46. Designations .. 46. Load carrying ability .. 47. Product 50. SNL plummer block housings for bearings on adapter sleeve .. 50. SNL plummer block housings for bearings with cylindrical 62. Sealing arrangements for SNL plummer block 72. Other products for trouble-free 76. The SKF Group a worldwide 82. 2. 1 Product information 2 Recommendations 3 Product data Customer benefits Page .. 10 Page .. 46. Fewer bearing replacements 1. and less maintenance plummer block housings SNL plummer block with less need of maintenance. This supports user efforts to further reduce have much to offer housings have more to maintenance costs. Among other char- The main benefit of split plummer offer acteristics the housings are very stiff, block housings is their easy installation; making them insensitive to uncon- pre-assembled shafts can be mounted SKF has developed the SNL plummer trolled and excessive tightening of the in them.

4 When the housing bases are block housings to be the first choice attachment bolts. attached to the base plate it is then for design, quality and economy. This Another benefit is the choice of oil only necessary to place the housing enables customers to keep a step or grease lubrication for the bearings caps in position and to tighten the ahead. housed in SNL plummer blocks. A. attachment bolts to complete the SNL plummer block housings enable range of efficient seals for oil lubrica- installation. the full service life potential of the in- tion and rough environments make for Split plummer block housings avail- cor16porated bearings to be exploited trouble-free operation. able on the market are mainly intended for self-aligning ball bearings, spherical roller bearings and CARB bearings of ISO Dimension Series 02, 03, 22, 23. and 32. They can often be fitted with various different seals.

5 Many designs and variants of split plummer block housings are available making the use of tailored housings unnecessary and thus enabling cost effective bearing arrangements to be made. For many years SKF has been one of the leading producers of split plum- mer block housings synonimous with operational reliability, quality and ver- satility. 3. 1 Product information 2 Recommendations 3 Product data Customer benefits Page .. 10 Page .. 46. One basic design Several sealing options An important advantage of the SNL. many variants plummer block housings is that they SNL plummer block housings are prim- can be fitted with a variety of seals. arily intended for self-aligning ball bear- The standard seals supplied by SKF. ings, spherical roller bearings and comprise double-lip seals, V-ring CARB bearings. The housings are seals, felt seals, labyrinth seals and designed on a building block principle.

6 Heavy-duty taconite seals as well as This enables a more generous choice end covers. Other standard seals are of bearing, shaft mounting, seals and also available for SNL housings , but type of lubrication. Stocking is also these are supplied together with the simplified. housings as the housing has to be modified to take them. These are oil A building block system seals and heavy-duty axial taconite The basis of the SNL plummer block seals. housing system consists of a number SNL plummer block housings are of housings of the same design but in fully interchangeable with the earlier different sizes. By combining these SNH housings . Their dimensions con- housings with the different standard form to ISO 113:1994. seals a wide variety of housing variants, all belonging to the standard range, can Painting system be supplied to cover the majority of SNL plummer block housings are demands for plummer blocks for shafts painted as standard in accordance having diameters of 20 to 160 mm, with ISO 12944-2, environmental inclusive.

7 The standard range also Class C2. Black colour: RAL 9005. covers other variants, for example, housings with drilled and tapped holes for lubrication nipples or condition monitoring sensors. housings are also available for bearings for larger shaft diameters ( page 79). SNL plummer block housings are made of grey cast iron and demon- strate high strength. Should, however, this strength be inadequate, dimen- sionally equivalent plummer block housings of spheroidal graphite cast iron can be supplied. SNL plummer block housing with sealing options 4. 1 Product information 2 Recommendations 3 Product data Customer benefits Page .. 10 Page .. 46. 1. 5. 1 Product information 2 Recommendations 3 Product data Design characteristics Page .. 10 Page .. 46. Costs and risks . at a low level SNL plummer block housings have several advantages, such as the high load carrying capacity and machining quality as well as the wide variety of sealing alternatives with the following design and performance characteristics.

8 Stiff design Excellent heat conduction The housing base is reinforced with ribs The web (rib) reinforcement of the housing and extra material surrounding the holes base enlarges the contact area between for the attachment bolts in order to provide base and base plate and allows for an improved seating on the base plate. The improved heat flow from the bearing outer attachment bolts can be preloaded to give ring to the base plate. The bearings will run correct location and prevent deformation of 5 to 10 % cooler than in other housings . the housing base and bore. Drilled and tapped hole with nipple SNL housings have a drilled and tapped hole as standard in the cap. The hole is protected by a plastic plug. The nipple is supplied, together with a nipple protecter, with the housing (packed inside). If the application is such that relubrication is required it is only necessary to screw the nipple into the hole and lubricant can be supplied to one side of the bearing.

9 Stiff design Insensitive to uncontrolled tightening of the attachment bolts, low operating temperatures Excellent heat Low bearing temperatures, high speed operation 0001. S27. conduction possible with oil lubrication, long relubrication intervals, long service life, low lubricant consumption 0001. S27. Drilled and tapped Relubrication facility as standard hole with nipple Caps and bases Avoids mixing of caps and bases, permits traceability individually marked Indications for holes to Simple and easy adaptation of standard housing to Caps and bases individually marked take other components individual applications, easy attachment of condition The housing base and cap are matched monitoring equipment during manufacture and are not inter- changeable with the caps and bases of Simple mounting Simple and reliable mounting and maintenance other housings .

10 To prevent mixing caps and bases when mounting several hous- Additional seals Several sealing options, long bearing service lives ings, the same consecutive number is marked on the cap and base of each individual housing . 6. 1 Product information 2 Recommendations 3 Product data Design characteristics Page .. 10 Page .. 46. 1. Indications for holes to take other Simple mounting Additional seals components In order to simplify mounting and make Two new seal designs have been de- SNL housings can be fitted with sensors alignment more accurate, cast indications, veloped specifically for SNL housings . serving permanently installed condition which are vertical to the centre of the bore One is intended for difficult conditions monitoring equipment based on vibration of the housing , are provided on the end which call for a robust seal which can be measurements.