Industrial shaft seals - skf.com

1 Industrial shaft seals SKF, DURATEMP, SPEEDI-SLEEVE and WAVE are registered trademarks of the SKF Group. SKF Group 2013 The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written per-mission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or conse-quential arising out of the use of the information contained data in this publication may differ from that provided in earlier publications because of redesign, technological developments or revised methods of calculation. SKF reserves the right to make continuing improvements to SKF products without prior notice with respect to materials, design and manufacturing methods, as well as changes necessitated by technological SE/P1 10919/2 EN June 2013 This publication supersedes publication conversion tableQuantityUnitConversion Lengthinch1 ,40 mm foot1 ,3048 m yard1 ,9144 mmile1 mile1 mile1,609 km Velocity,foot per second1 ft/s1 ft /s0,30480 m/sspeedfoot per minute1 ft/min1 ft/min0,00508 m/smile per hour1 mile/h1 mile/h1,609 km/h(mph)(mph)Forcepound-force1 ,4482 NPressure,pounds per1 MPa145 psi1 psi6,8948 103 Pastresssquare inchTemperature (degree)CelsiustC = 0,555 (tF 32)FahrenheittF = 1,8 tC + 321 Product data general.

2 112 Radial shaft seals .. 473 Cassette seals .. 3214 Wear sleeves .. 3275 Track pin seals .. 3736 Metal face seals .. 3797 V-ring seals .. 3898 Axial clamp seals .. 4719 Product index .. 4821234567891 This is SKFFrom one simple but inspired solution to a mis-alignment problem in a textile mill in Sweden, and fifteen employees in 1907, SKF has grown to become a global Industrial knowledge leader. Over the years we have built on our expertise in bearings, extending it to seals , mechatronics, services and lubrication systems. Our know-ledge network includes 46 000 employees, 15 000 distributor partners, offices in more than 130 countries, and a growing number of SKF Solution Factory sites around the world. Research and development We have hands-on experience in over forty industries, based on our employees knowledge of real life conditions. In addition our world-leading experts and university partners who pioneer advanced theoretical research and development in areas including tribology, condi-tion monitoring, asset management and bearing life theory.

3 Our ongoing commitment to research and devel opment helps us keep our customers at the forefront of their industries. SKF Solution Factory makes SKF knowledge and manu facturing expertise available locally, to provide unique solutions and services to our the toughest challenges Our network of knowledge and experience along with our understanding of how our core technologies can be combined helps us create innovative solutions that meet the toughest of challenges. We work closely with our customers throughout the asset life cycle, helping them to profitably and re spon sibly grow their for a sustainable future Since 2005, SKF has worked to reduce the negative environmental impact from our own operations and those of our suppliers. Our con-tinuing technology development intro duced the SKF BeyondZero portfolio of products and services which improve efficiency and reduce energy losses, as well as enable new technol-ogies harnessing wind, solar and ocean power. This combined approach helps reduce the environmental impact both in our own oper-ations and in our customers.

4 Working with SKF IT and logistics systems and application experts, SKF Authorized Distributors deliver a valuable mix of product and application knowledge to customers knowledge your successSKF Life Cycle Management is how we combine our technology plat forms and advanced ser vices, and apply them at each stage of the asset life cycle, to help our cus tomers to be more success ful, sustainable and closely with you Our objective is to help our customers improve productivity, minimize main ten ance, achieve higher energy and resource efficiency, and opti-mize designs for long service life and reliability. Innovative solutions Whether the application is linear or rotary or a combination of the two, SKF engineers can work with you at each stage of the asset life cycle to improve machine performance by looking at the entire application. This approach doesn t just focus on individual components like bearings or seals . It looks at the whole application to see how each com po nent interacts with the optimization and verificationSKF can work with you to optimize current or new designs with proprietary 3-D modeling software that can also be used as a virtual test rig to confirm the integrity of the design.

5 SKF the knowledge engineering companySpecificationDesign and developManufacture and testInstall and commissionOperate and monitorMaintain and repairSKF Life Cycle Management4 BearingsSKF is the world leader in the design, development and manufacture of high performance rolling bearings, plain bearings, bearing units and maintenanceCondition monitoring technologies and main tenance services from SKF can help minimize unplanned down-time, improve operational efficiency and reduce main-tenance solutionsSKF offers standard seals and custom engineered seal-ing solutions to increase uptime, improve machine reli-ability, reduce friction and power losses, and extend lubricant fly-by-wire systems for aircraft and drive-by-wire systems for off-road, agricultural and forklift applica-tions replace heavy, grease or oil consuming mechanical and hydraulic solutionsFrom specialized lubricants to state-of-the-art lubrication systems and lubrication management ser vices, lubrication solutions from SKF can help to reduce lubrication related downtime and lubricant and motion controlWith a wide assortment of products from actu ators and ball screws to profile rail guides SKF can work with you to solve your most pressing linear system is SKF.

6 2 SKF the knowledge engineering company .. 4 Foreword .. 9 SKF Industrial shaft seals and accessories .. 101 Product data general .. 11 Industrial shaft seals .. 12 Profile overview selection .. 13 Radial shaft seals .. 13 Wear sleeves .. 15 Axial shaft seals .. 16 Selection of seal design and material .. 17 Grease retention .. 17 Oil retention .. 18 Contaminant exclusion .. 19 Retention and exclusion .. 20 Separating two liquids .. 21 Circumferential and rotational speed .. 22 Pressure differentials .. 23 Limited space .. 24 Installation restrictions .. 25 Arrangement .. 26 Counterface design .. 27 Axial movement .. 28 Seal materials .. 29 Cases and inserts .. 29 Garter springs .. 29 SKF Bore Tite Coating .. 29 Adhesives and bonding agents .. 29 Sealing lip materials .. 30 Wear resistance .. 33 Operating temperatures .. 34 Chemical resistance .. 35 Storage and handling of seals .. 44 General .. 44 Storage .. 44 Cleaning and maintenance.

7 4562 Radial shaft seals .. 47 General .. 50 Outside diameter design .. 54 SKF Bore Tite Coating .. 54 Garter springs .. 55 Dimensions .. 55 Tolerances .. 55 Sealing lip design .. 57 Auxiliary lips .. 58 Coaxiality and runout .. 59 Coaxiality .. 59 Runout .. 61 Axial movement .. 63 Permissible speeds .. 63 Lubrication.. 65 Lubrication of paired arrangements .. 65 Friction .. 66 Chemical and thermal resistance .. 67 seals under pressure .. 69 shaft requirements .. 70 General .. 70 Tolerances .. 70 Surface roughness .. 70 Surface finish .. 72 Hardness and surface treatment .. 72 Lead-in chamfers .. 72 Housing bore requirements .. 74 General .. 74 Metal-reinforced seals .. 74 seals without metal-reinforcement .. 74 Tolerances .. 76 Surface roughness .. 76 Seal installation, general Industrial applications .. 77 General .. 77 Seal installation, heavy Industrial applications .. 79 Metal-reinforced seals .. 79 seals without metal reinforcement.

8 80 Split seals .. 80 Cover plates .. 82 Multiple HS seal installations .. 83 Multiple HDS seal installations .. 84 PTFE seals .. 85 Protecting the counterface surface against corrosion .. 87 Removal .. 87 Replacement .. 87 Designation system .. 88 Metric radial shaft seals .. 88 Inch-size radial shaft seals .. 88 Assortment and availability .. 88 seals for general Industrial applications .. 92 HMS5 and HMSA10 seals .. 92 CRW1, CRWA1, CRWH1 and CRWHA1 seals .. 104 CRW5 and CRWA5 seals .. 160 HDW1 seals .. 164 CRS1, CRSH1, CRSA1 and CRSHA1 seals .. 168 PTFE radial shaft seals .. 174HM and TL seals for grease lubricated applications .. 178X seals , sealing against housing bore .. 192 seals for heavy Industrial applications .. 202 General .. 202 Metal-cased seals .. 202 Rubber outside diameter seals .. 207 Additional design features .. 211 Size options of metal-cased HDS seals and all-rubber HS seals .. 215 Product tables .. 2173 Cassette seals .. 321 General.

9 322 Design features .. 323 Testing .. 323 Installation .. 323 SKF Mudblock seal designs MUD5 and MUD7 .. 3244 Wear sleeves .. 327 General .. 328 SKF Speedi-Sleeve .. 329 Features .. 329 Size range .. 329 SKF Speedi-Sleeve Gold .. 330 Test results .. 330 Selecting the right size .. 330 Installing SKF Speedi-Sleeve .. 331 Removing SKF Speedi-Sleeve .. 333 Product tables .. 334 Wear sleeves for heavy Industrial applications (LDSLV) .. 356 General .. 356 Designs and features .. 357 Using LDSLV designs .. 358 Installation .. 358 Removal .. 358 Product tables .. 36075 Track pin seals .. 373 General .. 374 Features and benefits .. 374 Product tables .. 3766 Metal face seals .. 379 General .. 380 Design features .. 380 Lubricant requirements .. 381 Permissible operating conditions .. 382 Contaminants .. 382 Installing HDDF seals .. 382 General .. 382 Housing and seal preparation .. 382 Installation procedure .. 383 Product tables .. 3847 V-ring seals .. 389 General .. 390 Features.

10 390 Materials .. 391 Standard designs .. 392 Main V-ring functions .. 393 Other V-ring functions .. 394 Sliding velocities .. 395 Coaxiality and runout .. 396 Misalignment .. 396 Counterface .. 397 Counterface treatment .. 397 Additional counterface information .. 397 Product table sorting order .. 398 shaft requirements .. 399 Installing V-rings .. 399 Product tables .. 400 MVR axial shaft seals .. 464 General .. 464 Advantages and user benefits .. 464 Design and material .. 464 Temperature range .. 464 Sizes .. 464 Installation .. 465 Product tables .. 4668 Axial clamp seals .. 471 General .. 472 Designs .. 472 Design of the sealing arrangement .. 473 Installation instructions .. 474 Product tables .. 4769 Product index .. 4828 ForewordThis edition of the Industrial shaft seals catalogue supersedes the one published in 2006 (publi-cation number 5300). For this new edition, numer ous revisions, additions and enhancements have been made to provide an even more com-prehensive guide.