<SEC-DOCUMENT>0001507947-25-000004.txt : 20251104
<SEC-HEADER>0001507947-25-000004.hdr.sgml : 20251104
<ACCEPTANCE-DATETIME>20251104161018
ACCESSION NUMBER:		0001507947-25-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251031
FILED AS OF DATE:		20251104
DATE AS OF CHANGE:		20251104

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kyle Richard G
		CENTRAL INDEX KEY:			0001507947
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-01169
		FILM NUMBER:		251449108

	MAIL ADDRESS:	
		STREET 1:		1835 DUEBER AVE SW
		CITY:			CANTON
		STATE:			OH
		ZIP:			44706

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TIMKEN CO
		CENTRAL INDEX KEY:			0000098362
		STANDARD INDUSTRIAL CLASSIFICATION:	BALL & ROLLER BEARINGS [3562]
		ORGANIZATION NAME:           	06 Technology
		EIN:				340577130
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4500 MT. PLEASANT ST. NW
		CITY:			NORTH CANTON
		STATE:			OH
		ZIP:			44720-5450
		BUSINESS PHONE:		(234) 262-3000

	MAIL ADDRESS:	
		STREET 1:		4500 MT. PLEASANT ST. NW
		CITY:			NORTH CANTON
		STATE:			OH
		ZIP:			44720-5450

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TIMKEN ROLLER BEARING CO
		DATE OF NAME CHANGE:	19710304
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1762290615.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-10-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000098362</issuerCik>
        <issuerName>TIMKEN CO</issuerName>
        <issuerTradingSymbol>TKR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001507947</rptOwnerCik>
            <rptOwnerName>Kyle Richard G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4500 MT. PLEASANT ST. NW</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NORTH CANTON</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44720</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Advisor to the CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2025-10-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4184</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>78.46</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>282779</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents withholding on March 31, 2025 grant of deferred shares (previously reported) to cover taxes following the award becoming non-forfeitable on October 31, 2025 pursuant to its terms.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Richard G. Kyle</signatureName>
        <signatureDate>2025-11-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
