SKF - Industrial Shaft Seals

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Radial shaft seals Seals without metal reinforcement Be sure that the shaft surface and housing bore are clean and that they meet the specifications listed in Shaft requirements and Housing bore requirements on pages 70 to 76. Special care must be taken to avoid nicks and burrs on the shaft and to make sure that the spring is retained in the spring groove. HS seals are installed differently depending on whether their main purpose in a specific application is to retain lubricant or to exclude contaminants († fig. 23). Split seals Where appropriate, insert the spring in the SKF Springlock groove and position the spring connection, so that it is displaced with regard to the seal joint († A in fig. 24). This is standard with all HS8 seals. Put the seal in the correct position on the shaft. Lightly coat both the seal and counterface surface with a lubricant, preferably the same lubricant that will be used to lubricate the application (B). Join the ends of the garter spring by using the spring connector (C). For threaded connectors, back-wind the spring a couple of turns before the ends are Ways of installing HS seals Fig. 23 brought together and allowed to thread into each other. When using a hook-and-eye connector, draw the ends of the spring together and insert the hook into the eye, taking care not to over-stretch the spring in the process, as this might impair seal performance. When using a control-wire connector, draw the seal ends together and insert the control wire into the centre of the spring coil. Position the seal joint on the shaft so that it is at the 12 o’clock position and push both ends of the joint into the housing bore (D). Do not push only one joint and then work around the shaft as this will create an excess length, making installation difficult or impossible. Continue at the 3 and 9 o’clock positions, push the rest of the seal into position (E) and finish simultaneously at the 6 and 12 o’clock positions. For shaft diameters ≥ 1 200 mm (47 in.), it is advis able to fix the seal at the 12, 3, 6 and 9 o’clock positions before locating the remaining sections of the seal. Use a small block of wood to push the seal in the housing bore until it contacts the housing shoulder (E). Check the seal condition, particularly at the joint, to make sure that it has been positioned properly. Install the cover plate (see paragraph Cover plates on page 82) on the housing face. Tighten the bolts evenly until the end cover abuts the housing face (F and G). HS seal installed to retain lubricant HS seal installed to exclude foreign material HS seals in tandem arrangement for maximum lubricant retention 80
Fig. 24 Installing a split seal A E 2 B F C D G 81
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Industrial shaft seals
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1 Product data - general ..........
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Meeting the toughest challenges Our
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Bearings SKF is the world leader in
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2 Radial shaft seals ..............
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Foreword This edition of the Indust
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Product data - general 1 Industrial
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Profile overview selection Radial s
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1 Cassette seals, SKF Mudblock MUD1
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V-ring Fig. 1 Selection of seal des
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CRW1 seal CRW1 seals in tandem Fig.
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CRW1 seals Fig. 16 Separating two l
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CRWA5 seal Fig. 19 Pressure differe
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V-ring seal V-ring seals Fig. 23 Fi
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Counterface design The service life
Page 31 and 32: Seal materials Cases and inserts Me
Page 33 and 34: Nitrile rubber (R) The term nitrile
Page 35 and 36: Polyacrylate elastomer Polyacrylate
Page 37 and 38: Chemical resistance In table 2, Che
Page 39 and 40: cont. table 2 Chemical resistance M
Page 47: Cleaning and maintenance In the eve
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Page 52 and 53: Radial shaft seals General Radial s
Page 54 and 55: Radial shaft seals Fig. 2 Metal-cas
Page 56 and 57: Radial shaft seals Outside diameter
Page 58 and 59: Radial shaft seals Table 2 Outside
Page 60 and 61: Radial shaft seals As a consequence
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Page 68 and 69: Radial shaft seals Friction To be e
Page 70 and 71: Radial shaft seals Table 4 Chemical
Page 72 and 73: Radial shaft seals Shaft requiremen
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Page 78 and 79: Radial shaft seals Tolerances The h
Page 80 and 81: Radial shaft seals Installation sle
Page 84 and 85: Radial shaft seals Cover plates Sea
Page 86 and 87: Radial shaft seals Multiple HDS sea
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Page 90 and 91: Radial shaft seals Designation syst
Page 92 and 93: Radial shaft seals Seals for genera
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Page 96 and 97: Radial shaft seals - HMS5 and HMSA1
Page 106 and 107: Radial shaft seals CRW1, CRWA1, CRW
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Radial shaft seals - CRW1, CRWA1, C
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Radial shaft seals CRW5 and CRWA5 s
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Radial shaft seals - CRW5 and CRWA5
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Radial shaft seals HDW1 seals HDW1
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Radial shaft seals CRS1, CRSH1, CRS
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Radial shaft seals - CRS1, CRSH1, C
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Radial shaft seals PTFE radial shaf
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Radial shaft seals Table 14 Materia
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Radial shaft seals HM and TL seals
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Radial shaft seals - HM and TL seal
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Radial shaft seals X seals, sealing
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Radial shaft seals - X seals - metr
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Radial shaft seals - X seals - inch
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Radial shaft seals Seals for heavy
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Radial shaft seals HDSA and HDSB ea
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Radial shaft seals Additional desig
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Radial shaft seals HSF fabric-reinf
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Radial shaft seals HS split seals I
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Radial shaft seals SKF Springlock T
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Radial shaft seals Table 19 Standar
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Radial shaft seals - HDS7 - metric
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Radial shaft seals - HDS7 - inch di
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Radial shaft seals - HDS7 - inch di
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Radial shaft seals - HDS7K - metric
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Radial shaft seals - HDS7K - inch d
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Radial shaft seals - HDL - metric d
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Radial shaft seals - HDL - inch dim
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Radial shaft seals - HDS1, HDS2 and
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Radial shaft seals - HDS1K - inch d
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Radial shaft seals - HDS2K - metric
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Radial shaft seals - HDSF and HDSH
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Radial shaft seals - HDSA and HDSB
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Radial shaft seals - HDSE1 - metric
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Radial shaft seals - HDSD and HDSE
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Radial shaft seals - SBF - metric d
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Radial shaft seals - HSF1 (split) a
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Radial shaft seals - HSF9 - metric
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Radial shaft seals - HS4 and HS5 -
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Radial shaft seals - HS4 and HS5 -
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Radial shaft seals - HS6, HS7 and H
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Cassette seals General ............
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Design features All SKF Mudblock se
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Fig. 2 SKF Mudblock seal MUD5 Half
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Wear sleeves General To seal effici
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Wear sleeves SKF Speedi-Sleeve Gold
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Wear sleeves Fig. 6 Fig. 7 Fig. 8 I
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SKF Speedi-Sleeve - metric dimensio
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SKF Speedi-Sleeve - inch dimensions
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Wear sleeves Wear sleeves for heavy
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Wear sleeves Using LDSLV designs Th
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Wear sleeves for heavy industrial a
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Track pin seals General ...........
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SKF Trackstar seals provide several
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Dimensions Spacer ring Bore Operati
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Metal face seals General SKF metal
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Metal face seals Permissible operat
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Metal face seals - HDDF - inch and
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Metal face seals - HDDF - inch and
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V-ring seals General ..............
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low but sufficient enough to mainta
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Main V-ring functions V-rings are s
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Sliding velocities V-rings can oper
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Counterface A fine-turned counterfa
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Shaft requirements Sharp edges, nic
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Dimensions Shaft diameter Seal insi
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Dimensions Design Lip Shaft diamete
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Installation The inside diameter of
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Dimensions Shaft Case outside Seal
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469 7.4
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Axial clamp seals General SKF axial
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Axial clamp seals Installation inst
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Axial clamp seals - CT1 and CT4 - m
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Axial clamp seals - CT1 and CT4 - m
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Axial clamp seals - CT1 and CT4 - i
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Product index Design Product group
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Design Product group Product table
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SKF - Industrial Shaft Seals

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