1. Cummins India Limited
2. Mahindra Powerol
3. Kirloskar Oil Engines Limited
4. Greaves Cotton Limited
5. Caterpillar India Private Limited
6. Sudhir Power Limited
7. Atlas Copco India Ltd
8. Escorts Limited
9. Cooper Corporation Pvt. Ltd.:
10. Mitsubishi Heavy Industries India Precision Tools
Ltd.