<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-10-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001374535</issuerCik>
        <issuerName>Altra Industrial Motion Corp.</issuerName>
        <issuerTradingSymbol>AIMC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001383278</rptOwnerCik>
            <rptOwnerName>Schuele Craig</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALTRA INDUSTRIAL MOTION CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>300 GRANITE STREET SUITE 201</rptOwnerStreet2>
            <rptOwnerCity>BRAINTREE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02184</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP Marketing and Business Dev</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value, $0.001</value>
            </securityTitle>
            <transactionDate>
                <value>2018-10-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2511</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.40</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>74223</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value, $0.001</value>
            </securityTitle>
            <transactionDate>
                <value>2018-10-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1026</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.40</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75249</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value, $0.001</value>
            </securityTitle>
            <transactionDate>
                <value>2018-10-16</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2123</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.40</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>77372</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents performance shares (and related accrued dividend equivalents) that were converted on October 16, 2018 into restricted common stock, par value $0.001 (&quot;Restricted Common Stock&quot;), upon the Compensation Committee's determination that certain performance goals had been met. The recent transaction between the Company and Fortive Corporation, which closed on October 1, 2018, constituted a &quot;change in control&quot; with respect to the performance shares resulting in the conversion of such performance shares into Restricted Common Stock based on the level of achievement of performance goals that measured the Company's total shareholder return (&quot;TSR&quot;) against the TSR of a peer group of companies over the period from January 1, 2016 to September 30, 2018.  The Restricted Common Stock is subject to forfeiture until February 15, 2019.</footnote>
        <footnote id="F2">Represents performance shares (and related accrued dividend equivalents) that were converted on October 16, 2018 into restricted common stock, par value $0.001 (&quot;Restricted Common Stock&quot;), upon the Compensation Committee's determination that certain performance goals had been met. The recent transaction between the Company and Fortive Corporation, which closed on October 1, 2018, constituted a &quot;change in control&quot; with respect to the performance shares resulting in the conversion of such performance shares into Restricted Common Stock based on the level of achievement of performance goals that measured the Company's total shareholder return (&quot;TSR&quot;) against the TSR of a peer group of companies over the period from January 1, 2017 to September 30, 2018.  The Restricted Common Stock is subject to forfeiture until February 23, 2020.</footnote>
        <footnote id="F3">Represents performance shares (and related accrued dividend equivalents) that were converted on October 16, 2018 into restricted common stock, par value $0.001 (&quot;Restricted Common Stock&quot;), upon the Compensation Committee's determination that certain performance goals had been met.  The recent transaction between the Company and Fortive Corporation, which closed on October 1, 2018, constituted a &quot;change in control&quot; with respect to the performance shares resulting in the conversion of such performance shares into Restricted Common Stock based on the level of achievement of performance goals that measured the Company's return on invested capital over the period from January 1, 2018 to September 30, 2018.  The Restricted Common Stock is subject to forfeiture until February 15, 2021.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Todd Patriacca, Attorney-In-Fact</signatureName>
        <signatureDate>2018-10-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
