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It explains why laser alignment is essential in a proactive maintenance strategy that helps identify incipient problems and extend machine operating life. The handbook outlines measuring and expressing alignment parameters, addresses required precision and tolerances, and offers troubleshooting content for breakdown causes such as misalignment effects, bearing and seal wear, and vibration symptoms. It also covers alignment methods by eyesight, dial indicator, and laser, including laser case studies, thermal expansion calculations, and installation and soft-foot measurement guidance.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/shaft-alignment-edition-4-03-007/564610/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/shaft-alignment-edition-4-03-007/564610.png","ImageObject",442,249,{"name":88,"@type":89},"วิน","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-23","2026-10-12",true,{"@type":98,"interactionType":99,"userInteractionCount":73},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"What is the purpose of this shaft alignment handbook?","Question",{"text":108,"@type":109},"It provides basic information and guidelines for implementing good shaft alignment for standard rotating machine systems, with methods, examples, and practical practices.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"Why is laser alignment considered important for maintenance?",{"text":113,"@type":109},"Laser alignment is described as an essential component of a viable maintenance strategy, helping reduce unexpected failures by identifying incipient problems and extending machine operating life.",{"name":115,"@type":106,"acceptedAnswer":116},"What alignment methods are covered in the handbook?",{"text":117,"@type":109},"The handbook presents alignment by eyesight, by dial indicator (including calculation-based methods), and by laser, along with laser operation requirements and case studies.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},564610,1792749676,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":73,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":135,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":141},2336475104736,"https://ap-avatar.wpscdn.com/avatar/22000c4c5e0e5b17e70?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786591360781797222","A Practical Guide to Shaft Alignment  \nCare has been taken by the authors, PRUFTECHNIK LTD, in the preparation of this publication. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or reference to the manufacturers of the machinery. No liability whatsoever can be accepted by PRUFTECHNIK LTD, PRUFTECHNIK AG or its subsidiaries for actions taken based on information contained in this publication. PRUFTECHNIK AG and/or its subsidiaries assume no responsibility directly or indirectly for any claims from third parties resulting from use or application of information contained in this handbook.  \n1  \nEdition 4;4-03 .007 © Copyright 2002  \nPRUFTECHNIK LTD All rights reserved  \nDistributed in the U.S. by LUDECA Inc. • [www.ludeca.com](www.ludeca.com)  \n© 2002 PRUFTECHNIK LTD.  \nThe purpose of producing this handbook is to provide basic information and guidelines for the implementation of good shaft alignment for standard rotating machine systems.  \nLaser alignment is an essential component of a viable maintenance strategy for rotating machines. In isolation each strategy can help to reduce unexpected machine failure but taken together they form the hub of a proactive maintenance strategy that will not only identify incipient problems but allows extending machine operating life considerably.  \nIn each section of this handbook we have used one or two examples of the available methods for measuring the required parameters. We do not suggest that the methods illustrated are the only ones available.  \nPrueftechnik are specialists in the alignment and monitoring of rotating machines, we have accumulated substantial practical knowledge of these subjects over the 30 years of our existence, in so doing we have produced many handbooks covering individual subjects and systems. This handbook is a distillation of this accumulated knowledge plus a brief overview in each section of the latest systems from Prueftechnik that address the specific applications concerned.  \nWe hope that this information is presented in a clear readable form and that it will provide for the reader new to the subject a platform to successfully apply profitable maintenance practice in their plant.  \nWe are indebted to our collegues in Prueftechnik AG (Germany) and our associates at LUDECA Inc. (USA) for permission to reproduce some of the graphics used in this handbook, additionally we have drawn on information previously published in Prueftechnik equipment handbooks for information on alignment standards, and graphical and mathematical methods of balance calculation. For this information we are grateful.  \n2 © 2002 PRUFTECHNIK LTD.  \nShaft Alignment  \nPage Number  \nWhat is shaft alignment 6  \n.. A definition 6  \n.. Machine catenary 7  \n.. Operation above critical speed 8  \nExpressing alignment 10  \n.. Alignment parameters 10  \n.. Angularity, gap and offset 11  \n.. Short flexible couplings 14  \n.. Spacer shafts 15  \nHow precise should alignment be? 18  \n.. Alignment tolerances 18  \nTroubleshooting 21  \n.. Coupling strain and shaft deflection 21  \nCauses of machine breakdown 23  \n.. Couplings and misalignment 23  \n.. Bearings 24  \n.. Seal wear 24  \n.. Machine vibration 25  \n.. Symptons of misalignment 25  \nAlignment methods and practice 27  \n.. Machine installation guidelines 28  \n.. Measurement and correction of soft foot 29  \nAlignment by Eyesight 33  \n3 © 2002 PRUFTECHNIK LTD.  \nPage Number  \nAlignment by Dial indicator 36  \n.. Trial and error method 37  \n.. Rim and face method-by calculation 38  \n.. Reverse indicator method-by calculation 41  \n.. Indicator bracket sag measurement 43  \nAlignment by Laser 45  \n.. Basic operation requirements 48  \nLaser alignment case study  \n.. Laser alignment cuts energy costs 52  \n.. Laser alignment improves pump reliability 56  \n.. Laser alignment improves bearing & seal life 58  \n.. Laser alignment reduces vibration alarms 59  \nThermal expansion of mac","cbCaiu1T3oaSsI68","https://ap.wps.com/l/cbCaiu1T3oaSsI68","pdf",3103441,63,"English","# What is shaft alignment\n## A definition\n## Machine catenary\n## Operation above critical speed\n# Expressing alignment\n## Alignment parameters\n## Angularity, gap and offset\n## Short flexible couplings\n## Spacer shafts\n# How precise should alignment be?\n## Alignment tolerances\n# Troubleshooting\n## Coupling strain and shaft deflection\n# Causes of machine breakdown\n## Couplings and misalignment\n## Bearings\n## Seal wear\n## Machine vibration\n## Symptoms of misalignment\n# Alignment methods and practice\n## Machine installation guidelines\n## Measurement and correction of soft foot\n# Alignment by Eyesight\n# Alignment by Dial indicator\n## Trial and error method\n## Rim and face method-by calculation\n## Reverse indicator method-by calculation\n## Indicator bracket sag measurement\n# Alignment by Laser\n## Basic operation requirements\n## Laser alignment case study\n### Laser alignment cuts energy costs\n### Laser alignment improves pump reliability\n### Laser alignment improves bearing & seal life\n### Laser alignment reduces vibration alarms\n# Thermal expansion of machines\n## Thermal growth calculations","[{\"question\":\"What is the purpose of this shaft alignment handbook?\",\"answer\":\"It provides basic information and guidelines for implementing good shaft alignment for standard rotating machine systems, with methods, examples, and practical practices.\"},{\"question\":\"Why is laser alignment considered important for maintenance?\",\"answer\":\"Laser alignment is described as an essential component of a viable maintenance strategy, helping reduce unexpected failures by identifying incipient problems and extending machine operating life.\"},{\"question\":\"What alignment methods are covered in the handbook?\",\"answer\":\"The handbook presents alignment by eyesight, by dial indicator (including calculation-based methods), and by laser, along with laser operation requirements and case studies.\"}]","Shaft Alignment - Edition 4 -03 - 007 | PDF",1791843195,22]