rEPOrT OF INdEPENdENT rEgIsTErEd PuBlICACCOuNTINg FIrM To the Board of Directors and Shareholders of The Timken Company We have audited The Timken Company and subsidiaries’ internal control over financial reporting as of December 31, 2011, based on  criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway  Commission (the COSO criteria). The Timken Company and subsidiaries’ management is responsible for maintaining effective internal  control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the  accompanying Report of Management on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the  Company’s internal control over financial reporting based on our audit. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those  standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over  financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over  financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of  internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances.  We believe that our audit provides a reasonable basis for our opinion. A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability  of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted  accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to  the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the  company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements  in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only  in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding  prevention or timely detection of unauthorized acquisition, use or disposition of the company’s assets that could have a material effect  on the financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections  of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in  conditions, or that the degree of compliance with the policies or procedures may deteriorate. As indicated in the accompanying Report of Management on Internal Control Over Financial Reporting, management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include the internal controls of Timken Gears  and Services Inc. and Timken Drives LLC, which are included in the 2011 consolidated financial statements of The Timken Company and  subsidiaries. The total assets of Timken Gears and Services Inc. and Timken Drives LLC represented less than six and three percent,  respectively, of the Company’s total assets at December 31, 2011. Net sales of Timken Gears and Services Inc. and Timken Drives LLC  represented less than two and one percent, respectively, of net sales for the year then ended and less than four and one percent,  respectively, of net income for the year then ended. Our audit of internal control over financial reporting of The Timken Company and  subsidiaries’ also did not include an evaluation of the internal control over financial reporting of Timken Gears and Services Inc. or Timken Drives LLC. In our opinion, The Timken Company and subsidiaries maintained, in all material respects, effective internal control over financial  reporting as of December 31, 2011, based on the COSO criteria. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the  consolidated balance sheets of The Timken Company and subsidiaries as of December 31, 2011 and 2010 and the related consolidated  statements of income, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2011, and our  report dated February 17, 2012 expressed an unqualified opinion thereon. /s/ ERNST & YOUNG LLP Cleveland, Ohio February 17, 2012 THE TIMKEN COMPANY 88