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

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2010-06-23</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>11:00:00</finalEffectivenessDispTime>
        <form>S-4</form>
        <filer>
            <cik>0001374535</cik>
            <entityName>Altra Holdings, Inc.</entityName>
            <fileNumber>333-164646</fileNumber>
        </filer>
        <filer>
            <cik>0001319916</cik>
            <entityName>Altra Industrial Motion, Inc.</entityName>
            <fileNumber>333-164646-15</fileNumber>
        </filer>
        <filer>
            <cik>0001242646</cik>
            <entityName>AMERICAN ENTERPRISES MPT CORP</entityName>
            <fileNumber>333-164646-14</fileNumber>
        </filer>
        <filer>
            <cik>0001321808</cik>
            <entityName>American Enterprises MPT Holdings, LLC</entityName>
            <fileNumber>333-164646-13</fileNumber>
        </filer>
        <filer>
            <cik>0001321810</cik>
            <entityName>Ameridrives International, LLC</entityName>
            <fileNumber>333-164646-12</fileNumber>
        </filer>
        <filer>
            <cik>0001321880</cik>
            <entityName>Boston Gear LLC</entityName>
            <fileNumber>333-164646-11</fileNumber>
        </filer>
        <filer>
            <cik>0001321805</cik>
            <entityName>Formsprag LLC</entityName>
            <fileNumber>333-164646-10</fileNumber>
        </filer>
        <filer>
            <cik>0001365458</cik>
            <entityName>Inertia Dynamics, LLC</entityName>
            <fileNumber>333-164646-09</fileNumber>
        </filer>
        <filer>
            <cik>0001321911</cik>
            <entityName>Kilian Manufacturing CORP</entityName>
            <fileNumber>333-164646-08</fileNumber>
        </filer>
        <filer>
            <cik>0001321813</cik>
            <entityName>Nuttall Gear, LLC</entityName>
            <fileNumber>333-164646-07</fileNumber>
        </filer>
        <filer>
            <cik>0001398790</cik>
            <entityName>TB Wood's INC</entityName>
            <fileNumber>333-164646-06</fileNumber>
        </filer>
        <filer>
            <cik>0001000227</cik>
            <entityName>TB WOODS CORP</entityName>
            <fileNumber>333-164646-05</fileNumber>
        </filer>
        <filer>
            <cik>0001398789</cik>
            <entityName>TB Wood's Enterprises, Inc.</entityName>
            <fileNumber>333-164646-04</fileNumber>
        </filer>
        <filer>
            <cik>0001321806</cik>
            <entityName>Warner Electric LLC</entityName>
            <fileNumber>333-164646-03</fileNumber>
        </filer>
        <filer>
            <cik>0001321819</cik>
            <entityName>Warner Electric Technology LLC</entityName>
            <fileNumber>333-164646-02</fileNumber>
        </filer>
        <filer>
            <cik>0001321818</cik>
            <entityName>Warner Electric International Holding, Inc.</entityName>
            <fileNumber>333-164646-01</fileNumber>
        </filer>
    </effectiveData>
</edgarSubmission>
