Jurisdiction of Incorporation

Altra Industrial Motion Corp.,

Delaware

- Guardian Couplings LLC,

Delaware

- Nuttall Gear LLC,

Delaware

- Ameridrives International LLC,

Delaware

- Formsprag LLC,

Delaware

- Warner Electric LLC,

Delaware

- Warner Electric Technology LLC,

Delaware

- Svendborg Brakes USA, LLC

Delaware

- Boston Gear LLC,

Delaware

- Bauer Gear Motor LLC,

Delaware

- Inertia Dynamics LLC,

Delaware

- Kilian Manufacturing Corporation,

Delaware

- Kilian Canada ULC,

Canada

- TB Wood’s Corporation,

Delaware

- TB Wood’s Incorporated,

Pennsylvania

- T.B. Wood’s Canada Ltd.,

Canada

- Industrial Blaju, S.A. de C.V.,

Mexico

 - Altra Industrial Motion (Thailand) Ltd.,

Thailand

- Stevens Holding Company Inc.,

Delaware

- AS Motion LLC,

Delaware

- AS Motion North America Inc.,

Delaware

- G&L Motion Control Inc.,

Delaware

- Thomson Linear LLC,

Delaware

 - American Precision Industries, Inc.,

Delaware

- Portescap U.S., Inc.,

New York

- Heat Transfer Guarantee Co., LLC,

Delaware

- API Harowe (St. Kitts) Ltd.,

St. Kitts and Nevis

- Portescap S.A.,

Switzerland

- Portescap Co., Ltd.,

Japan

 - Motion Engineering Incorporated,

California

 - Ball Screws and Actuators Co., Inc.,

California

 - Wermex Corporation,

Texas

 - Thomson Industries, Inc.

New York

- ABEK LLC,

Delaware

- Thomson Industries S. de R.L. de C.V.,

Mexico

- Jacobs Vehicle Systems, Inc.,

Delaware

- PacSci Motion Control, Inc.,

Massachusetts

 - Kollmorgen Corporation,

New York

 - TGA Motion AB,

Sweden

- AS Motion International B.V.,

Netherlands

 - Elsim Elektroteknik Sistemler Sanayi ve Ticaret A.S.,

Turkey

 - AS Motion Hong Kong Ltd.,

Hong Kong

- AT Business Systems LLC,

Delaware

- Altra Industrial Motion International Holding, LLC,

Delaware

- Altra Industrial Motion Netherlands B.V.,

Netherlands

- Altra Industrial Motion Germany GmbH,

Germany

  - Kollmorgen s.r.o.,

Czech Republic

- Kollmorgen s.r.l.,

Italy

- Jacobs Vehicle Systems Europe s.r.o.,

Czech Republic

   - Thomson Neff Industries GmbH,

Germany

   - Kollmorgen Automation AB,

Sweden

- Tollo Linear AB,

Sweden

            - Kollmorgen Europe GmbH,

Germany

            - Stieber GmbH,

Germany

            - Stromag Holding GmbH,

Germany

 - Stromag GmbH,

Germany

- Stromag Dessau GmbH,

Germany

- Altra Industrial Motion India Private Ltd.,

India

- Warner Electric (Neth) Holding B.V.,

Netherlands

 - Altra Industrial Motion Australia Pty. Ltd.,

Australia

- Altra Industrial Motion Hong Kong Limited

Hong Kong

   - Altra Industrial Motion (ShenZhen) Co., Ltd.,

China

- Altra Industrial Motion Singapore Pte. Ltd.,

Singapore

- Altra Industrial Motion Taiwan Ltd.,

Taiwan

- Altra Industrial Motion Switzerland Sarl

Switzerland

- Altra Industrial Motion UK Holding Ltd.,

United Kingdom

 - Altra Industrial Motion UK Ltd.,

United Kingdom

   - Matrix International Ltd.,

United Kingdom

     - Matrix International GmbH,

Germany

   - Bauer Gear Motor Ltd.,

United Kingdom

   - Twiflex Ltd.,

United Kingdom

   - Huco Engineering Industries Ltd.,

United Kingdom

   - Bibby Transmissions Ltd.,

United Kingdom

     - Altra Industrial Motion South Africa (Pty.) Ltd.,

South Africa

 - AS Motion Asiapac Holding Ltd.,

Hong Kong

   - A&S Industry Technology (Tianjin) Co., Ltd.,

China

   - Portescap Singapore Pte., Ltd.,

Singapore

     - Portescap India Private Limited,

India

   - Jacobs (Suzhou) Vehicle Systems Co., Ltd.,

China

- Bauer Gear Motor GmbH,

Germany

- Bauer Gear Motor Europe GmbH,

Germany

- Bauer Gear Motor Slovakia s.r.o.,

Germany

- Aluminium Die Casting S.r.L.,

Italy

- Bauer Gear Motor Finland Oy Ab,

Finland

- Altra Industrial Motion Russia OOO,

Russia

- Warner Electric (Holding) SAS,

France

- Warner Electric Europe SAS,

France

- Stromag Holding SAS,

France

  - Stromag France SAS,

France

- Altra Industrial Motion do Brasil Equipamentos Industriais Ltda.,

Brazil

- Altra Industrial Motion Denmark ApS,

Denmark

-S.B. Patent Holding ApS,

Denmark

-Svendborg Brakes ApS,

Denmark

    - Svendborg Brakes Espana S.A.,

Spain

    - Svendborg Brakes Australia Pty. Ltd.,

Australia

    - Svendborg Brakes Korea Co. Ltd.,

Korea

    - Svendborg Brakes Chile Ltd.,

Chile

    - Svendborg Brakes India Ltd.,

India

    - Svendborg Brakes Shanghai Co. Ltd.,

China

    - Svendborg Brakes Trading (Shanghai) Co. Ltd.,

China

    - Svendborg Brakes Peru S.A.C.

Peru