{"id":261573,"date":"2024-10-19T17:19:58","date_gmt":"2024-10-19T17:19:58","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-21940-12019-tc\/"},"modified":"2024-10-25T13:07:05","modified_gmt":"2024-10-25T13:07:05","slug":"bs-iso-21940-12019-tc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-21940-12019-tc\/","title":{"rendered":"BS ISO 21940-1:2019 &#8211; TC"},"content":{"rendered":"<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>66<b><\/td>\n<td>National foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>71<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>72<b><\/td>\n<td>Introduction  <\/td>\n<\/tr>\n<tr>\n<td><b>73<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions <br \/> 4 Fundamentals of balancing <br \/> 4.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>74<b><\/td>\n<td>4.2 Unbalance of a single disc  <\/td>\n<\/tr>\n<tr>\n<td><b>76<b><\/td>\n<td>4.3 Unbalance distribution <br \/> 4.4 Unbalance representation  <\/td>\n<\/tr>\n<tr>\n<td><b>77<b><\/td>\n<td>5 Factors to consider when balancing <br \/> 5.1 General <br \/> 5.2 Rotors with rigid behaviour  <\/td>\n<\/tr>\n<tr>\n<td><b>78<b><\/td>\n<td>5.3 Rotors with flexible behaviour <br \/> 5.3.1 General <br \/> 5.3.2 Shaft-elastic behaviour  <\/td>\n<\/tr>\n<tr>\n<td><b>79<b><\/td>\n<td>5.3.3 Component-elastic behaviour <br \/> 5.3.4 Settling behaviour <br \/> 5.4 Examples of rotor behaviours  <\/td>\n<\/tr>\n<tr>\n<td><b>80<b><\/td>\n<td>6 Selection of a balancing procedure  <\/td>\n<\/tr>\n<tr>\n<td><b>81<b><\/td>\n<td>7 Unbalance tolerances <br \/> 7.1 General <br \/> 7.2 Permissible residual unbalance <br \/> 7.2.1 General <br \/> 7.2.2 Permissible residual unbalance for rotors with rigid behaviour <br \/> 7.2.3 Permissible residual unbalance for rotors with flexible behaviour  <\/td>\n<\/tr>\n<tr>\n<td><b>82<b><\/td>\n<td>7.3 Vibration limits <br \/> 7.4 Influence of modes above service speed  <\/td>\n<\/tr>\n<tr>\n<td><b>83<b><\/td>\n<td>7.5 Factors influencing balancing procedures <br \/> 7.5.1 General <br \/> 7.5.2 Tolerances <br \/> 7.5.3 Speed and support conditions <br \/> 7.5.4 Initial unbalance <br \/> 8 Selection of a balancing machine <br \/> 8.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>84<b><\/td>\n<td>8.2 Special requirements  <\/td>\n<\/tr>\n<tr>\n<td><b>85<b><\/td>\n<td>9 International Standards on balancing <br \/> 9.1 General <br \/> 9.2 Vocabulary <br \/> 9.2.1 ISO 21940\u20112 \u2014 Balancing vocabulary <br \/> 9.2.2 ISO 2041 \u2014 Vibration and shock vocabulary <br \/> 9.3 Balancing procedures and tolerances <br \/> 9.3.1 General <br \/> 9.3.2 ISO 21940\u201111 \u2014 Procedures and tolerances for rotors with rigid behaviour  <\/td>\n<\/tr>\n<tr>\n<td><b>86<b><\/td>\n<td>9.3.3 ISO 21940\u201112 \u2014 Procedures and tolerances for rotors with flexible behaviour <br \/> 9.3.4 ISO 21940\u201113 \u2014 Criteria and safeguards for the in-situ balancing of medium and large rotors <br \/> 9.3.5 ISO 21940\u201114 \u2014 Procedures for addressing balancing errors  <\/td>\n<\/tr>\n<tr>\n<td><b>87<b><\/td>\n<td>9.4 Balancing machines <br \/> 9.4.1 ISO 21940\u201121 \u2014 Description and evaluation of balancing machines <br \/> 9.4.2 ISO 21940\u201123 \u2014 Enclosures and other protective measures for the measuring station of balancing machines <br \/> 9.5 Machine design for balancing <br \/> 9.5.1 ISO 21940\u201131 \u2014 Susceptibility and sensitivity of machines to unbalance  <\/td>\n<\/tr>\n<tr>\n<td><b>88<b><\/td>\n<td>9.5.2 ISO 21940\u201132 \u2014 Shaft and fitment key convention  <\/td>\n<\/tr>\n<tr>\n<td><b>89<b><\/td>\n<td>Annex A (informative) Mathematical and graphical representation of unbalance  <\/td>\n<\/tr>\n<tr>\n<td><b>96<b><\/td>\n<td>Annex B (informative) Examples of different rotor behaviours as indicated on a typical hard\u2011bearing balancing machine  <\/td>\n<\/tr>\n<tr>\n<td><b>102<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Tracked Changes. Mechanical vibration. Rotor balancing &#8211; Introduction<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2020<\/td>\n<td>104<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":261577,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[321,2641],"product_tag":[],"class_list":{"0":"post-261573","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-21-120-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/261573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/261577"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=261573"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=261573"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=261573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}