{"id":1645,"date":"2025-07-09T00:26:54","date_gmt":"2025-07-08T22:26:54","guid":{"rendered":"https:\/\/wp.stromer-tech.info\/?post_type=ht_kb&p=1645"},"modified":"2026-06-15T00:45:23","modified_gmt":"2026-06-14T22:45:23","slug":"stator-magnets-loose","status":"publish","type":"ht_kb","link":"https:\/\/wp.stromer-tech.info\/en\/knowledge-base\/stator-magnete-lose\/","title":{"rendered":"Rotor magnets loose"},"content":{"rendered":"

If you hear noises from the motor, they usually come from the bearings, more rarely from the thru axle (Clicking, ST1x<\/a>Loose rotor magnets are also a source of noise, but rarely occur as a fault.<\/p>\n\n\n

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Screenshot<\/figcaption><\/figure>\n<\/div>\n\n
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Magnets with clearly recognizable shell traces<\/figcaption><\/figure>\n<\/div>\n\n\n

The magnets are glued. The adhesive must be able to withstand both mechanical and thermal stresses. The latter means temperatures of up to 150 \u00b0C. To reduce the drying time, manufacturers usually use cyanoacrylate adhesives (instant adhesives). However, these are not really heat-resistant and, as they are hygroscopic, are not immune to moisture.<\/p>\n\n\n

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ST3 motor<\/figcaption><\/figure>\n<\/div>\n\n\n

DIY repair<\/h3>\n\n\n\n

In the unlikely event that this should occur, a heat-resistant 2-component epoxy adhesive <\/a>can be used. First sand everything clean, clean with IPA (isopropyl alcohol), apply and spread adhesive, insert magnets, remove excess adhesive and allow to harden at room temperature.<\/p>\n\n\n\n

Further information<\/h3>\n\n\n\n

> See<\/a> also PROBLEMS - MOTOR - 'Repairs to the TDCM hub motor<\/em>'
> speedpedelecreview.com | JanR
<\/a>> YouTube | EBike Builder
<\/a>> YouTube | Grin Technologies<\/a>
etc.<\/p>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

H\u00f6rt man Ger\u00e4usche vom Motor kommen diese meist von den Lagern, seltener von der Steckachse (Klacken, ST1x). Auch lose Rotormagnete sind eine Ger\u00e4uschquelle, kommen als Fehlerbild aber selten vor. Die Magnete sind geklebt. Der Kleber muss sowohl mechanische wie thermische Beanspruchungen aushalten. Letzteres heisst Temperaturen von sicher 150 \u00b0C. Um…<\/p>","protected":false},"author":1,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[206],"ht-kb-tag":[377,376],"class_list":["post-1645","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-p-motor","ht_kb_tag-2k-epoxidkleber","ht_kb_tag-stormagnete"],"_links":{"self":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb\/1645","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/comments?post=1645"}],"version-history":[{"count":10,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb\/1645\/revisions"}],"predecessor-version":[{"id":11712,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb\/1645\/revisions\/11712"}],"wp:attachment":[{"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/media?parent=1645"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb-category?post=1645"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/wp.stromer-tech.info\/en\/wp-json\/wp\/v2\/ht-kb-tag?post=1645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}