SNR : SNC Pillow Block Housings

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Labyrinth seal SC..LATaconite seal SC..TAFor adverse ambient conditions, all SNC bearinghousings can be fitted with labyrinth seals. Thesealing ring and the sealing groove in the housingform a labyrinth with a narrow sealing gap. Thegreat advantage of these seals is that the bearingarrangement can be operated at the permissiblespeed for the bearings used. The labyrinth ring issynchronised on the shaft by the installed roundcord.The maximum misalignment of the shaft may not begreater than 0.3°.The operating temperature range for this seal isbetween -40°C and +200°C.Optional relubrication of the labyrinth seal is possible.The marking points cast into the housing abovethe sealing groove are used for this purpose.Note that one seal must be ordered for eachside of the housing. The delivery includes alabyrinth ring (material: cast iron or steel) andthe associated round cord.This type of seal is predominantly used whereextreme ambient conditions prevail. Thanks to itsexceptionally robust design, the sealing systemprotects against fine dust and large dirt particlesand is secure against moisture. Overall, threedifferent sealing systems within the component areresponsible for the outstanding sealing effect:• Labyrinth ring that can be relubricated(threaded bore M6) with radial cross pieces;• Shaft sealing;• Cavity completely filled with grease, which actsas a grease lock.The separable Taconite seal is fixed in the sealinggroove between the upper and lower housingsections using an O ring. The labyrinth ring rotateswith the shaft. This is ensured by a round cord thatis inserted between the shaft and the labyrinth ring.The shaft sealing ring is pressed into the stationarypart of the seal. The sealing lip slides on the shaft.The shaft diameter should lie within the tolerancefield h9. We recommend twist free ground shaftswith a roughness of less than R a 3.2 µm.Misalignment of up to 0.5° is technically possible.The permissible temperature range for this seal isbetween -40°C and +100°C. Circumferentialspeeds of up to 10 m/s can be realised. Higher temperaturesare possible using appropriate materials.Our application engineers will be happy to adviseyou on the options we offer.Note that one seal must be ordered for each sideof the housing. The delivery includes a completelyassembled Taconite seal (lubricatingfitting included).15
Cover plate SC...ECCover plates are available for all SNC bearing housings. The cover plate is made of corrosion-resistant sheetsteel and has a circular rubber lip made of NBR (butadiene acrylonitrile rubber). It is fixed in the sealinggroove between the upper and lower section and effectively seals the housing. Cover plates can be combinedwith any other seal in the SNC range. The temperature range for cover plates is between -40°C and+100°C.For details of the dimensions of the permissible shaft ends, refer to the dimension table (dimension w 1 ).The delivery includes one cover plate with vulcanised rubber lip.Special sealsIn special cases, it is possible that standard seals will not satisfy specific operating requirements. For example,if particularly high temperatures are required, SNC bearing housings can be fitted with seals made ofspecial materials. SNR bearing housings can also be adapted with sealing solutions that differ from the standarddesign.Our application engineers will be happy to advise you on the options we offer.16
Page 1 and 2: IndustrySNR : The SNC PillowBlock R
Page 3 and 4: ForewordSNR is one of Europe's lead
Page 5 and 6: Latest generation of SNCpillow bloc
Page 7 and 8: Structural detailsDuring developmen
Page 9 and 10: Markings for mounting with fourfast
Page 11 and 12: Seal versionsSC..DS Double lip seal
Page 13 and 14: Sealing systemsThere are a wide var
Page 15: Dimensions of supporting rings for
Page 19 and 20: Bearing arrangement constructionSNC
Page 22 and 23: Loads and torquesThe table below co
Page 24 and 25: Lubricating fitting and lubricant d
Page 26 and 27: Abutment dimensions for B RDC regul
Page 28 and 29: Mounting the bearingsIt is often th
Page 30 and 31: Preparation and important instructi
Page 32 and 33: 34Clamp the shaft horizontally (pro
Page 34 and 35: 4 5Clamp the shaft horizontally (pr
Page 36 and 37: 3 4Insert the pre-mounted shaft int
Page 38 and 39: 34Insert the pre-mounted shaft into
Page 40 and 41: 2Clamp the shaft horizontally (prot
Page 42 and 43: V-ring sealSC..SV+CoverSC..ECLabyri
Page 66 and 67:
V-ring sealSC..SV+CoverSC..ECLabyri
Page 68 and 69:
Maintenance: SNR lubricating grease
Page 70:
SNR : SNC Pillow Block HousingsDesi
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SNR : SNC Pillow Block Housings

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