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| ý | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

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| ¨ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

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|                                                               |
|---------------------------------------------------------------|
|                                                               |  |  |
| OHIO                                                          |   | 34-0577130 |
| (State or other jurisdiction ofincorporation or organization) |   | (I.R.S. EmployerIdentification No.) |
|                                                          |   |   |
| 1835 Dueber Ave.,SW, Canton, OH                               |   | 44706-2798 |
| (Address of principal executive offices)                      |   | (Zip Code) |

|                                   |
|-----------------------------------|
|                                   |  |  |  |  |  |  |
| Large accelerated filer |   | ý |    | Accelerated filer |   | ¨ |
|                              |   |   |   |   |   |   |
| Non-accelerated filer             |   | ¨ |    | Smaller reporting company |   | ¨ |

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|--------|
|        |  |  |  |  |
|   | Class |    | Outstanding at September 30, 2012 |   |
|   | Common Shares, without par value |    | 95,847,056 shares |   |

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| 10.1   | Form of Non-Compete Agreement entered into with the Group Presidents, as adopted August 6, 2012. |
|   |   |
| 12     | Computation of Ratio of Earnings to Fixed Charges. |
|   |   |
| 31.1   | Certification of James W. Griffith, President and Chief Executive Officer (principal executive officer) of The Timken Company, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|   |   |
| 31.2   | Certification of Glenn A. Eisenberg, Executive Vice President – Finance and Administration (principal financial officer) of The Timken Company, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|   |   |
| 32     | Certifications of James W. Griffith, President and Chief Executive Officer (principal executive officer) and Glenn A. Eisenberg, Executive Vice President – Finance and Administration (principal financial officer) of The Timken Company, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. |
| 101*   | Financial statements from the quarterly report on Form 10-Q of The Timken Company for the quarter ended September 30, 2012, filed on October 29, 2012, formatted in XBRL: (i) the Consolidated Statements of Income, (ii) the Consolidated Statements of Comprehensive Income, (iii) the Consolidated Balance Sheets, (iv) the Consolidated Statements of Cash Flows and (v) the Notes to the Consolidated Financial Statements. |
|   |   |

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|                        |
|------------------------|
|                        |  |  |
|                   |   | THE TIMKEN COMPANY  |
| Date: December 3, 2012 |   | By: /s/ James W. Griffith |
|                   |   | James W. GriffithPresident and Chief Executive Officer(Principal Executive Officer) |
|                   |   |   |
| Date: December 3, 2012 |   | By: /s/ Glenn A. Eisenberg |
|                   |   | Glenn A. EisenbergExecutive Vice President – Finance and Administration (Principal Financial Officer) |