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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-10-02</periodOfReport>

    <issuer>
        <issuerCik>0000716823</issuerCik>
        <issuerName>MILACRON INC</issuerName>
        <issuerTradingSymbol>MZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001286533</rptOwnerCik>
            <rptOwnerName>ISAACS STEVEN NEIL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2090 FLORENCE AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CINCINNATI</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45206</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>6.0% Series B Convertible Preferred Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>17.50</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-10-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>287500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>62.39</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2004-06-10</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-06-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3285714</value>
                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F4"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>As Director of Glencore Finance AG</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On October 2, 2007, Glencore Finance AG sold 287,500 shares of 6.0% Series B Convertible Preferred Stock beneficially owned by it to Ohio Plastics, LLC, for an aggregate purchase price of $17,937,500, or approximately $62.39 per share.</footnote>
        <footnote id="F2">The conversion price and number of underlying shares of common stock in respect of the 6.0% Series B Convertible Preferred Stock disposed of by Glencore Finance AG has been adjusted in light of a 1-for-10 reverse stock split effected by Milacron Inc. in May 2007.</footnote>
        <footnote id="F3">As of the date hereof, Glencore Finance AG continues to beneficially own certain contingent warrants issued to it on March 15, 2004.  Such contingent warrants were not sold by Glencore Finance AG pursuant to the transaction described in the first sentence of note 1 above.  Such contingent warrants entitle Glencore Finance AG to purchase 57,500 shares of common stock of Milacron Inc. (after taking into account the reverse split referenced in note 2 above).  As of the date hereof, Glencore Finance AG has not exercised any of the contingent warrants beneficially owned by it.</footnote>
        <footnote id="F4">The reporting person is reporting this transaction as a result of his position with Glencore Finance AG and membership on the board of directors of Milacron Inc.  The reporting person disclaims personal beneficial ownership of these securities.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Walter S. Wood, Attorney - in - Fact</signatureName>
        <signatureDate>2007-10-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
