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        <link:definition>41501 - Disclosure - FAIR VALUE (Summary of Fair Value Assets and Liabilities) (Details)</link:definition>
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        <link:definition>00090 - Document - Document and Entity Information</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>00405 - Statement - CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical)</link:definition>
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  <xsd:element name="DeferredRsusAndPsusInShares" id="leco_DeferredRsusAndPsusInShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TechnologyKnowHowMember" id="leco_TechnologyKnowHowMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RestrictiveCovenantsMember" id="leco_RestrictiveCovenantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RestrictedStockUnitsAndPerformanceShareUnitsMember" id="leco_RestrictedStockUnitsAndPerformanceShareUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GeneralInformationPolicyTextBlock" id="leco_GeneralInformationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableOtherAssetsAcquiredAndOtherLiabilitiesAssumedNet" id="leco_BusinessCombinationRecognizedIdentifiableOtherAssetsAcquiredAndOtherLiabilitiesAssumedNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FaceAmountOfLoanAssociatedWithInterestRateSwap" id="leco_FaceAmountOfLoanAssociatedWithInterestRateSwap" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PowermigAutomaoESoldagemLtdaMember" id="leco_PowermigAutomaoESoldagemLtdaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SteveHedlundMember" id="leco_SteveHedlundMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RestructurePlansMember" id="leco_RestructurePlansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
