Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-140349) pertaining to the 2004 Equity Incentive Plan of Altra Holdings, Inc., and in the Registration Statement (Form S-3 No. 333-162511) of Altra Holdings, Inc., of our report dated March 6, 2009 (except for Note 17, as to which the date is November 4, 2009), with respect to the consolidated financial statements and schedule of Altra Holdings, Inc. as of December 31, 2008 and for each of the two years in the period ended December 31, 2008 included in this Annual Report (Form 10-K) for the year ended December 31, 2009.

/s/ Ernst & Young LLP

Boston, Massachusetts
March 9, 2010