SKF Couplings

1 SKF Couplings SKF is a registered trademark of the SKF Group. Hytrel and Viton are registered trademarks of DuPont. SKF Group 2018. The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission 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 consequential arising out of the use of the information contained herein. PUB PT/P1 15822/2 EN Janurary 2018. This publication supersedes publications 6897 EN, 6897/1 EN. and 6897/2 EN. Contents SKF the knowledge engineering Installation .. 49 SKF Universal Joints .. 81. company .. 4 Product tables Selection .. 81. W4 4 Bolt single .. 51 Engineering data .. 81. SKF Couplings .. 6 W4 4 Bolt double .. 52 Order data .. 81. Coupling selection guide .. 7 W6 6 Bolt double .. 53 Product tables Selection parameters for SKF shaft W8 8 Bolt double.

2 54 Single universal joints .. 82. Couplings .. 8 Floating shaft disc Couplings .. 55 Double universal joints .. 82. Product tables SKF Grid Couplings .. 10 W4 FH Floating shaft .. 57 General engineering data on Selection .. 10 W6 FH Floating shaft .. 58 SKF Couplings .. 83. Engineering data .. 13 W8 FH Floating shaft .. 59 Keyseat dimensions metric, Order data .. 13 British standard (inch) and ANSI .. 83. Installation .. 16 SKF Flex Couplings .. 60. Product tables Selection .. 60 Lubrication .. 98. Horizontal split cover .. 18 Engineering data .. 62. Vertical split cover.. 19 Order data .. 62 Related products.. 100. Grid Couplings with taper bushing Installation .. 63 Shaft alignment tools .. 100. option .. 20 Product tables SKF Stroboscopes TKRS series .. 105. Full spacer .. 21 SKF Flex flanges types B, F and H .. 65. Half spacer .. 22 SKF Flex Spacer Coupling .. 66. Installation .. 66. SKF Gear Couplings .. 23 Product tables Selection .. 24 SKF Flex Spacer Coupling.

3 68. Engineering data .. 26. Order data .. 26 SKF Chain Couplings .. 69. Installation .. 31 Selection .. 69. Product tables Engineering data .. 70. Double entgagement .. 32 Order data .. 71. Single engagement .. 33 Installation .. 71. Double engagement, heat treated Product tables and alloy steel series .. 34 Bored-to-size and taper bushing Double engagement Spacer.. 35 types FTB and HTB .. 72. Double engagement Vertical .. 36. Double engagement Slide .. 37 SKF FRC Couplings .. 73. Single engagement Slide .. 38 Selection .. 73. Rigid flanged sleeve .. 39 Engineering data .. 74. Gear Couplings with taper bushing Order data .. 74. option .. 40 Installation .. 75. Floating shaft gear Couplings .. 41 Product tables Product tables SKF FRC Couplings .. 76. Single engagement Vertical and floating shaft .. 43 SKF Jaw Couplings .. 77. Single engagement Floating shaft 44 Selection .. 77. Engineering data .. 77. SKF Disc Couplings .. 45 Order data .. 77. Selection.

4 45 Installation .. 79. Engineering data .. 46 Product tables Order data .. 46 SKF Jaw Couplings .. 80. 3. SKF the knowledge engineering company From one simple but inspired solution to a misalignment 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 exper- Meeting the toughest challenges Working for a sustainable future tise in bearings, extending it to seals, mecha- Our network of knowledge and experience, Since 2005, SKF has worked to reduce the tronics , services and lubrication systems. along with our understanding of how our negative environmental impact from our Our knowledge network includes 46 000 core technologies can be combined, helps operations and those of our suppliers. Our employees, 15 000 distributor partners, us create innovative solutions that meet the continuing technology development resulted offices in more than 130 countries, and a toughest of challenges.

5 We work closely with in the introduction of the SKF BeyondZero growing number of SKF Solution Factory our customers throughout the asset life portfolio of products and services which im- sites around the world. cycle, helping them to profitably and prove efficiency and reduce energy losses, responsibly grow their businesses. as well as enable new technologies har- Research and development nessing wind, solar and ocean power. This We have hands-on experience in over forty combined approach helps reduce the envir- industries based on our employees' know- onmental impact both in our operations and ledge of real life conditions. In addition, our our customers' operations. world-leading experts and university part- ners pioneer advanced theoretical research and development in areas including tribol- ogy, condition monitoring, asset manage- ment and bearing life theory. Our ongoing commitment to research and development helps us keep our customers at the forefront of their industries.

6 Working with SKF IT and logistics systems and application experts, SKF. SKF Solution Factory makes SKF knowledge and manufacturing expertise Authorized Distributors deliver a valuable mix of product and application available locally to provide unique solutions and services to our customers. knowledge to customers worldwide. 4. Design and develo p Man ion ufa at ctu ific re an Spec d te SKF Life Cycle st Our knowledge Management ission your success Ma int ai m SKF Life Cycle Management is how we combine our technology n an om platforms and advanced services, and apply them at each stage d rep dc air n of the asset life cycle, to help our customers to be more la tal successful, sustainable and profitable. Opera Ins te and monitor Working closely with you Bearings SKF is the world leader in the design, development Our objective is to help our customers and manufacture of high performance rolling improve productivity, minimize mainten- bearings, plain bearings, bearing units and housings.

7 Ance, achieve higher energy and resource efficiency, and optimize designs for long service life and reliability. Machinery maintenance Condition monitoring technologies and main- Innovative solutions tenance services from SKF can help minimize Whether the application is linear or rotary unplanned downtime, improve operational efficiency and reduce maintenance costs. or a combination, 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 Sealing solutions doesn't just focus on individual components SKF offers standard seals and custom engineered like bearings or seals. It looks at the whole sealing solutions to increase uptime, improve application to see how each component in- machine reliability, reduce friction and power losses, and extend lubricant life. teracts with each other. Design optimization and verification SKF can work with you to optimize current Mechatronics or new designs with proprietary 3-D mod- SKF fly-by-wire systems for aircraft and drive-by- elling software that can also be used as a wire systems for off-road, agricultural and forklift virtual test rig to confirm the integrity of the applications replace heavy, grease or oil consuming mechanical and hydraulic systems.

8 Design. Lubrication solutions From specialized lubricants to state-of-the-art lubrication systems and lubrication management services, lubrication solutions from SKF can help to reduce lubrication related downtime and lubricant consumption. Actuation and motion control With 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 challenges. 5. SKF Couplings Flexible Couplings are devices used to me- In response to industry's ultimate need to sizes and capacity ratings for many applica- chanically connect two shafts to transmit produce more with less, SKF has combined tions and factory environments. power from one shaft to the other. They are its knowledge and experience with the latest For large, heavy duty applications, SKF. also able to compensate for shaft misalign- technology to develop solutions for a variety has large size Couplings . These Couplings , ment in a torsionally rigid way.

9 Misalignment of applications and operating conditions. which provide optimum contact with the can be angular, parallel or skew. This is par- Whether the goal is to design equipment shaft, can accommodate high torque values, ticularly important for applications where that provides more customer value, or to while reducing power loss and minimizing misalignment could affect the velocity and improve overall profitability, SKF's experience the effects of misalignment. acceleration of the driven shaft. The perfor- and expertise can help you meet your goals. mance of the coupling depends largely upon SKF offers a wide range of standard and how it is installed, aligned and maintained. customised coupling products. SKF Cou- plings cover a wide range of coupling types, 6. Coupling selection transfer element, with typical features listed Special note on engine (IC) drives as follows: guide Where the prime mover is an internal combustion (IC) engine, special consid- Elastomeric Couplings (transfer element eration needs to be given to the number typically a rubber or urethane compound of cylinders, balance (flywheel), in con- Introduction or a derivative).

10 Junction with the driven machines'. There is an extensive range of Couplings Torsionally soft characteristics, especially in relation available on the market today. Unsurprising- No lubrication required to the system's torsional vibration. ly, selecting the best coupling for a particular Generally less expensive (for similar torque The type of coupling selected needs application can be a complicated matter. capabilities) than metallic Couplings to be able to withstand, and compensate A coupling can be simply defined as a Usually have field replaceable elements for, conditions not normally associated device that transmits power (torque) from or elastomers with electric motor or turbine prime one shaft to another, while allowing some Wide range of series available with some mover systems. degree of misalignment (angular, parallel or universal interchange combined) between the two rotating shafts . In addition to the above definition, some Metallic Couplings (transfer element typi- Couplings allow for axial (end-float) move- cally steel).