UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: June 23, 2010 11:00 A.M.
Form: S-4
CIK: 0001374535
Company Name: Altra Holdings, Inc.
File Number: 333-164646
CIK: 0001319916
Company Name: Altra Industrial Motion, Inc.
File Number: 333-164646-15
CIK: 0001242646
Company Name: AMERICAN ENTERPRISES MPT CORP
File Number: 333-164646-14
CIK: 0001321808
Company Name: American Enterprises MPT Holdings, LLC
File Number: 333-164646-13
CIK: 0001321810
Company Name: Ameridrives International, LLC
File Number: 333-164646-12
CIK: 0001321880
Company Name: Boston Gear LLC
File Number: 333-164646-11
CIK: 0001321805
Company Name: Formsprag LLC
File Number: 333-164646-10
CIK: 0001365458
Company Name: Inertia Dynamics, LLC
File Number: 333-164646-09
CIK: 0001321911
Company Name: Kilian Manufacturing CORP
File Number: 333-164646-08
CIK: 0001321813
Company Name: Nuttall Gear, LLC
File Number: 333-164646-07
CIK: 0001398790
Company Name: TB Wood's INC
File Number: 333-164646-06
CIK: 0001000227
Company Name: TB WOODS CORP
File Number: 333-164646-05
CIK: 0001398789
Company Name: TB Wood's Enterprises, Inc.
File Number: 333-164646-04
CIK: 0001321806
Company Name: Warner Electric LLC
File Number: 333-164646-03
CIK: 0001321819
Company Name: Warner Electric Technology LLC
File Number: 333-164646-02
CIK: 0001321818
Company Name: Warner Electric International Holding, Inc.
File Number: 333-164646-01