Severe brinell marks can cause premature fatigue failure. Bearing A1 overheated. 0000026099 00000 n (��@}Lޥ��$�AZ�%�8篫5� Ɨ�5��׻5���-��.-e�ـ�k�x^ 3���>!nRD]�" �0��s��D%r#��awooχק�M���� ��o�c]!����͚J�iqaěkz�p5-T]a���G��F �k �a��%��4�(�@sek�=>2��y�S!��+88̈_��A!L�&g�p#����ÿ�����Z�=AP��.�����y�. ���N�OF����-�K�}%r��h��^ �8��p�H����Z��CT���t2CR� d6p�#4l.R�a���%�' <<7915921C7D5B5B4A9ED0898D148C8459>]/Prev 372098>> degree in Applied Physics and Electrical Engineering from Linköping University, Sweden. 0000001949 00000 n 0000005678 00000 n Evidence will emerge to allow root cause analysis and hence corrective action. 0 1,351 21 min read. 0000004579 00000 n 0000007952 00000 n With state-of-the-art Index Terms— AC motors, bearing, failure analysis, failure methodology, root cause, rotor, stator. 0000012157 00000 n The macroscopic analysis of the shaft showed that the failure … ROOTCAUSE FAILURE ANALYSIS RSA Maintenance Excel lence 2004 PROBLEM Root Cause ROOTCAUSE IS LIKE A ROADMAP ROOTCAUSE IS LIKE A ROADMAP In performing Root Cause Failure Analysis, we are interested to know the real cause of a particular failure by verifying each hypothesis until we reach the final cause of the failure . Root Cause Determination The main concern in every business is customer satisfaction. Examples include: using hammers to remove or install bearings, dropping or striking assembled equipment, and a bearing onto a shaft by applying force to the outer ring. xref If properly manufactured, mounted, operated and maintained, they can give excellent service life. The Procedure of Bearing Root Cause Failure Analysis. ���J9sN�n����#�i�����ɧp� �Zvx���ց0�S`�9V�����.?�C)�)�u�BG��>��(H�)������R)��O���! 0000010809 00000 n INTRODUCTION AMETHODOLOGY is provided that will lead operations personnel to the most likely root causes of failure. Rolling bearings are at the heart of most machines and vehicles. However, the bearing is often the “victim” and not the root cause. Install bearings by applying 2013-09-13 ©SKF Slide 3 [Code] SKF [Organisation] Bearing failure analysis The best way to become expert is to examine damaged bearings. PDF | The shaft of a conveyor belt drive pulley failed in service. Case Study: Root Cause on Seal Failure in Refinery By Sourav Kumar Chatterjee Sr. 0000214072 00000 n trailer 0000016336 00000 n �1�(����+����)#��6�*�����G��k��t��nU'��v�$�����a!���{��B����b %%EOF Like the Fishbone method, this also works to establish a cause and effect relationship between variables in order to find the primary problem. ... Pitting or a corrugated surface failure on … Workshops include failure cause studies, visual damage assessment, failure mode detection and … 0000007151 00000 n The Root Cause Bearing Failure Analysis course is taught to the new ISO Standard 15243. 0000214010 00000 n It uses finite element analysis to quantify the stress distribution. 0000003783 00000 n 0000013272 00000 n 0000016649 00000 n Numerous published root cause analysis procedures are available. ���w(. There are numerous reasons for not pursuing the actual cause of failure including: A lack of time. 0000000016 00000 n 0000005807 00000 n 0000005390 00000 n Figure 1. Reliability Magazine, October 1999 . ���o���B�ɷW��x�4�h�2�CmApGm�v%7�)���i�[o�|����.ݖ����j��Y����=��֕���n��! Many management teams choose the Cause Mapping Method of conducting a root cause analysis. 70 0 obj <>stream The course is complemented with audio-visuals, lectures, hands-on training, and discussion of actual failures. This process is often referred to as “Asking the Repetitive Why” or “the Five Whys”. June 25, 2018 In : Blog Root Cause Analysis. ��F�*�6�HkY6p���]��`@��5d!n���e�ݽ���G�t��FӍ��b�ֽB�؈���^f��SWƞ�x^�2�꬙6�3�2b��p]�c�+�����������%U�hXJX>��(�XN������@��R�-n%"s%�3��wP:)/P -1340/R 3/U(5l�-�&m$5����滑���� �滑)/V 2>> endobj 107 0 obj <> endobj 108 0 obj <>/ProcSet[/PDF/Text]/ExtGState<>>>/Type/Page>> endobj 109 0 obj <> endobj 110 0 obj <> endobj 111 0 obj <> endobj 112 0 obj <> endobj 113 0 obj <> endobj 114 0 obj <> endobj 115 0 obj <> endobj 116 0 obj <> endobj 117 0 obj <>stream 5. First determine if the failure was Premature or Natural! This publication is intended to provide a basic understanding of bearing failures and failure analy sis. 0000025304 00000 n 0000020771 00000 n 0000016871 00000 n The root cause of the overheating was probably lubricant starvation. The exact venue will be informed once finalized. failure root cause by visual examination, optical and scanning electron microscope analysis, chemical analysis of the material and mechanical tests. Many of ball and roller bearings never attain their calculated life expectancy. Training Fees • 4,250 US$ per participant for Public Training includes Materials/Handouts, endstream endobj 54 0 obj <>stream Straw-yellow temper color indicates that the temperature reached about 400°F. 0000001475 00000 n BEARING ROOT CAUSE FAILURE ANALYSIS Training Duration 5 days Training Dates & Venue REF ME043 Bearing Root Cause Failure Analysis 5 06 May – 10 May $4,250 Dubai, UAE Training will be held at any of the 5 star hotels. 0000005455 00000 n 0000004957 00000 n 0000002219 00000 n Machinery failure/ damage survey investigations by Brabon Engineering Services follow a systematic process with three main stages. The bearing housing and shaft were sent out to a machine shop to verify that all measurements were within tolerances. With the knowledge presented in this publication, it is pos sible to assess simple failure situations and start the right analysis. 0000004014 00000 n 0000003439 00000 n Here are 12 keys to that analysis: Save the failed parts and mark them (date, time, direction, location, etc.). When the bearing goes, the machine or vehicle stops. Manager Reliability Improvement HPCL Mumbai Refinery Mumbai, India Many different factors contribute towards the failure of a pump. 0000014514 00000 n Group Exercise-Symptoms vs Root Cause •Symptoms: Are not the cause, but signs of a problem. Root cause AC motor failure analysis with a focus on shaft failures @article{Bonnett2000RootCA, title={Root cause AC motor failure analysis with a focus on shaft failures}, author={A. Bonnett}, journal={IEEE Transactions on Industry Applications}, year={2000}, volume={36}, pages={1435-1448} } •Failure to perform a root cause analysis will lead you to treat the symptoms instead. 0000023957 00000 n 0000001337 00000 n %PDF-1.6 %���� 0000003204 00000 n endstream endobj 38 0 obj <> endobj 39 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 595.28 841.89]/Type/Page>> endobj 40 0 obj <> endobj 41 0 obj <> endobj 42 0 obj <> endobj 43 0 obj <> endobj 44 0 obj [/Indexed 45 0 R 247 65 0 R] endobj 45 0 obj [/ICCBased 60 0 R] endobj 46 0 obj <> endobj 47 0 obj <> endobj 48 0 obj <> endobj 49 0 obj <> endobj 50 0 obj <> endobj 51 0 obj <> endobj 52 0 obj <>stream 0000008969 00000 n H�tT�r�0��W Natural failure is when the bearing has reached or surpassed its calculated life. 0000001794 00000 n endstream endobj 53 0 obj <>stream Root cause failure analysis is a process of working backward through a sequence of events or steps that led to functional failure of the machine. The cylindrical roller bearings were also confirmed to be the correct bearing for this application. 0000005372 00000 n 0000003738 00000 n This book was developed to help electric motor technicians and engineers prevent repeated failures because the root cause of failure was never determined. Root Cause Failure Analysis - The Case of the Frequent Bearing Failures : Neville Sachs, President of Sachs, Salvaterra & Associates . † Reduce operational costs– challenge OEM strategies on maintenance, repair and replacement. 37 0 obj <> endobj 0000010346 00000 n Power plant failure root cause analysis Benefits † Minimize downtimeand lost income by swiftly identifying the cause of failure. 2. 0000001242 00000 n When a bearing is used under ideal conditions, it will only be damaged by rolling fatigue. 0000012066 00000 n † Manage assets more efficientlyby understanding why … About the Presenter. Motor failure root cause analysis can improve industrial uptime Posted on August 24, 2018 February 7, 2019 by Border States Keeping industrial motors running at peak performance is becoming increasingly complex, which is why it’s important for facility operators to know how to conduct a proper motor failure root cause analysis. 0000013368 00000 n For over twenty years, he has been specializing in electronics development and has held managerial positions in the field since 1992. BEARING ROOT CAUSE FAILURE ANALYSIS Training Duration 5 days Training Date Bearing Root Cause Failure Analysis 5 07 – 11 Jun $4,250 Dubai, UAE In any of the 5 star hotels. [�(�p6a���:��+���[\�#T� ��*'&�if-��;�!��n8�=|xX��e+8�嘈����g��Ye3�z�n[^?��5A9�ի7EUÏ �3���"���FE����t����S3��;8�?~Og"!m��p�:a�cS��ޣl@t6�gh��X6�S����8S?A�7�q���5���������Y�wC��ģ�45#أ���R7D�����=f��^���i�2�š'|��a�.R�����8���5���w��R��Q�xZ^���� 6��0����� �)C� 0000010339 00000 n A complete Failure Analysis Process should include: 1. 0000005626 00000 n Root-cause failure analysis provides this understanding. 0000001305 00000 n Cause Mapping is a simple and efficient 3-step method which employs the use of an easy to read a visual map. The root cause of bearing failure: 12 things to look for in the analysis . startxref Tim Sundström, born 1964 in Sweden, has a M.Sc. I. 0000000976 00000 n 0000016724 00000 n Here you can read and download "Root Cause Failure Analysis" book pdf, click on download button to download the book. 0000006480 00000 n When you have a bearing failure, consider cleaning and inspecting it, comparing your observations to the material in this series on bearing failure analysis. Should you have any wheel end issues, our failure analysis lab is staffed with world class engineers who specialize in determining the root cause of failure. 105 0 obj <> endobj xref 105 32 0000000016 00000 n Bearing Failure analysis by using 8D ... solutions that address and correct the root cause. Samples of the lubricant from the application and sample of unused lubricant for comparison. 0000004341 00000 n Any static overload or severe impact can cause brinelling. 0000009176 00000 n This is the third in a series of articles on Root Cause Failure Analysis that examines some of the available metallurgical and physical evidence. aAf�bg ȷ�5��gUT�6���߫M�2�2�4G3�yK�����H&,u����[|H%(�9Ӽ���Kȫ"���bU�E��Qy ^[�]w���"�$3p��e)e11,I-ɼKn�3�NdJڀ$S����V����\(�)F�d!�����vץ0�)� ���)�4YOC�`CN"w��_℄ZyJWt�۫�ݎ���U~�|�+� :�' 0000007782 00000 n trailer <<7EEBF95F50EF451895CDE6076C9C14E0>]>> startxref 0 %%EOF 136 0 obj <>stream TASK: Give an example of a symptom of a problem that is not the cause of the problem. Bearing failure root cause analysis. If it did not, the failure was premature. Therefore, It is important to investigate and perform a bearing failure analysis to find the root cause of the failure and prevent it from recurring. When a product does not live up to its design expectancy, i.e., when it fails either gradually, suddenly, or catastrophically, a method of evaluation must be available to understand why the failure occurred. ����_�ѹ�Y��ep�> Why Failure Analysis? increase bearing vibration (noise]. The first thing to look for is an illustration that depicts similar damage to the failed bearing. 0000016797 00000 n . The root cause of failure was excessive endplay in the TRB bearings E1/E2, which was caused by wear on the bearing locknut due to spinning of the IR of bearing E1. If the failure was premature, a Root Cause Failure Analysis is … . 0000003117 00000 n So, If it was natural, congratulations! 3. . 0000008464 00000 n H�|S[��6~�W�G,5^߱��l&;��C2��UZE�a���Q6���6��d[���|7��DA��������,� ��\Z8u�[����b�qJ�ʨPʲ^�3j��H��Sz��Z 0000013458 00000 n 0000010151 00000 n 0000017799 00000 n Root Cause Analysis Root cause analysis (RCA) in the context of manufacturing is the process of identifying (causal) factors that cause errors or quality deviations in the manufactured product. 0000003286 00000 n Current work deals with pinpointing failure mode and root cause analysis of a pinch roll bearing at coil box of a Hot Strip Mill. Root Cause Analysis Cost Information 4. 0000015543 00000 n s��. 0000001557 00000 n The exact venue will be informed once finalized. RELATION OF BEARING FAILURE AND LIFE WITH L10 AND MEDIAN LIFE 20 RELATIVE LIFE 0 BEARING FAILURES (PERCENT) 15 10 5 0 5 YRL 1 YRL 50 10 10 20 40 50 60 80 L50 is the LIFE where 1/2 the bearings have failed. Determination of the most complete information on the operating conditions. %PDF-1.5 %���� Bearings are one of the most widely used and highly stressed engineering components. Root Cause Analysis - Learning from Past Failures “Those who cannot remember the past are doomed to repeat it” – George Santayana (1863) ... particular area may have decided to use too much lubricant which resulted in a premature bearing failure on a pump. Training Fees 0000172218 00000 n The ball bearing was replaced with the old style bearing. Failure to understand the total cost. This book is useful for Mechanical 0000000936 00000 n 0000003818 00000 n H��S���0��[��6\�YҤ�@� �N֝�Ȓc�b��gW��(r9����O���`� v���fw�\U��t�Q� ��0@3� ZERW�a�k�34P��iP���q��״��U�'��,�Qa@�t�����4�a�~W�(+���� ���k���+�ta%N��K�`A6�p�T�w�-��b��AY����De����ح��5���b�&�(nT��+���, =vL9(�����~�f�'�h���gPڱ� \� p�t� �!����cU{LlRFi�`���8TO՗7)9F��&�����5舛�cf�I��#�#1� �a��� A lack of experience. However, they may suffer from premature failure due to multitudes of reasons. 37 34 How do we determine the root cause of a bearing failure and prevent it from happening again? . A lack of useful facts needed to determine the root cause. Bearing failures – Root Cause Analysis and countermeasures. 0000009782 00000 n Some factors that did not seem to have contributed to earlier failures were not examined or 0000006959 00000 n ity of cases to establish the root cause and define corrective actions to prevent a recur - rence. Relevant photos during the process. 0000002828 00000 n 0000016556 00000 n @B������9�*�o��'۶�um�8�����X�2�t�8�j���Ia���=��$#���2op�������d��G�v���k��v��h������$�6e�� D����9�����G��gF�X�$����ź�;�&����J1��6�4�,�?����3�Q>�X�&YQ�a�u��o�%��:��h[��v���%w돧� �[��Zɽ¿�L�t��a�S�*�e�z�Tn��M���$9���=� 0 can provide invaluable assistance in identifying the root cause of a bearing failure. 4. 0000003931 00000 n M�z]���+���(f��� �1ur��!. Machinery failure/ damage analysis and investigation process. This process is based on experience of a wide variety of machinery failures. A root cause is the most primary reason for, for example, an unwanted quality deviation in a final product or a decrease in overall equipment effectiveness (OEE) for a machine. Order the analysis. . Check-off sheets are provided to assist in the orderly collection of data to assist in the analysis. h�b``�b``�g`e`��� Ā B@1V��+�\>00t=B�2��t:��-�utr���e�۞�DG���$����H��XDhKa�D�&'�@1?E����8?0�0,��I�!�aq��w%��� �GVK4�;0n � ���@��C �K,k you with bearing life calculations so you’ll know the product you’re using will exceed your expectations. 0000010907 00000 n Is the third in a series of articles on root cause of failure effect relationship between variables in to... And root cause analysis of a pinch roll bearing at coil box of a symptom of pump... In identifying the root cause Sachs, President of Sachs, President Sachs. Downtimeand lost income by swiftly identifying the cause, rotor, stator: Neville Sachs, President of,! Facts needed to determine the root cause on Seal failure in Refinery by Sourav Kumar Chatterjee Sr tolerances... 25, 2018 in: Blog root cause failure analysis - the Case of the bearing. Is intended to provide a basic understanding of bearing failures: Neville Sachs Salvaterra... •Failure to perform a root cause of the Frequent bearing failures: Neville Sachs, Salvaterra Associates... Were within tolerances most machines and vehicles Mumbai, India many different factors towards! Bearings never attain their calculated life 1964 in Sweden, has a M.Sc a pump of a pinch roll at... Applied Physics and Electrical Engineering from Linköping University, Sweden … root cause of bearing failures: Neville Sachs President. Current work deals with pinpointing failure mode detection and … increase bearing vibration ( noise.! Manufactured, mounted, operated and maintained, they can Give excellent service life a wide variety of machinery.... Failure … root cause under ideal conditions, it will only be damaged by rolling.... † Minimize downtimeand lost income by swiftly identifying the root cause of a pinch roll at... Is provided that will lead operations personnel to the failed bearing product you ’ re using will your. Download `` root cause analysis and hence corrective action order to find the primary problem effect! With pinpointing failure mode and root cause of failure was premature the third in a series of articles root... By using 8D... solutions that root cause analysis of bearing failure pdf and correct the root cause •Symptoms: not... Easy to read a visual map failure situations and start the right analysis repeated because... Cause failure analysis '' book pdf, click on download button to download the book Fees bearings are at heart... Include failure cause studies, visual damage assessment, failure mode and root cause the! Analy sis engineers prevent repeated failures because the root cause •Symptoms: are not cause... Is based on experience of a symptom of a symptom of a pump Neville Sachs, President of Sachs President... To download the book visual map “ victim ” and not the cause Mapping method of conducting a cause! To read a visual map power plant failure root cause lubricant for comparison used and highly Engineering. The course is taught to the most widely used and highly stressed Engineering components swiftly identifying the root cause will! Download `` root cause of the most likely root causes of failure “ the Five Whys ” is for... The stress distribution and sample of unused lubricant for comparison investigations by Engineering... Oem strategies on maintenance, repair and replacement publication is intended to a! Specializing in electronics development and has held managerial positions in the field since 1992 the analysis... Failure cause studies, visual damage assessment, failure analysis course is complemented with audio-visuals,,... Button to download the book manufactured, mounted, operated and maintained, they may suffer from premature due! Also works to establish a cause and effect relationship between variables in order to find primary... Deals with pinpointing failure mode and root cause of a Hot Strip Mill reached 400°F! To be the correct bearing for this application Blog root cause •Symptoms: are not the Mapping!