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<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Fri Jul 24 20:04:42 UTC 2026 -->
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  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
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  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/PvpAdjustmentsOnly" xlink:type="extended">
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    <loc xlink:type="locator" xlink:label="rbc_SCTStockAwardsColumnValueMember" xlink:href="rbc-20260903.xsd#rbc_SCTStockAwardsColumnValueMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="rbc_SCTStockAwardsColumnValueMember" order="5" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="rbc_SCTOptionAwardsColumnValueMember" xlink:href="rbc-20260903.xsd#rbc_SCTOptionAwardsColumnValueMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="rbc_SCTOptionAwardsColumnValueMember" order="7" xbrldt:closed="true"/>
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  <definitionLink xlink:role="http://rbcbearings.com./role/AdditionalDimensions" xlink:type="extended"/>
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