EXHIBIT 31.2


   CERTIFICATION OF CHIEF FINANCIAL OFFICER, SECRETARY AND CONTROLLER
           PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT

I, Craig R. Mackus, certify that:

1.   I have reviewed this quarterly report on Form 10-Q of Bucyrus
     International, Inc.

2.   Based on my knowledge, this quarterly report does not contain any
     untrue statement of a material fact or omit to state a material
     fact necessary to make the statements made, in light of the
     circumstances under which such statements were made, not misleading
     with respect to the period covered by this quarterly report;

3.   Based on my knowledge, the financial statements, and other
     financial information included in this quarterly report, fairly
     present in all material respects the financial condition, results
     of operations and cash flows of the registrant as of, and for, the
     periods presented in this quarterly report;

4.   The registrant's other certifying officer and I are responsible for
     establishing and maintaining disclosure controls and procedures (as
     defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
     registrant and we have:

     a)   Designed such disclosure controls and procedures, or caused
          such disclosure controls and procedures to be designed under
          our supervision, to ensure that material information relating
          to the registrant, including its consolidated subsidiaries,
          is made known to us by others within those entities,
          particularly during the period in which this quarterly report
          is being prepared;

     b)   Evaluated the effectiveness of the registrant's disclosure
          controls and procedures and presented in this report our
          conclusions about the effectiveness of the disclosure
          controls and procedures, as of the end of the period covered
          by this report based on such evaluation; and

     c)   Disclosed in this report any change in the registrant's
          internal control over financial reporting that occurred
          during the registrant's most recent fiscal quarter that has
          materially affected, or is reasonably likely to materially
          affect, the registrant's internal control over financial
          reporting; and

5.   The registrant's other certifying officer and I have disclosed,
     based on our most recent evaluation of internal control over
     financial reporting, to the registrant's auditors and the audit
     committee of registrant's board of directors (or persons performing
     the equivalent function):

     a)   all significant deficiencies and material weaknesses in the
          design or operation of internal control over financial
          reporting which are reasonably likely to adversely affect the
          registrant's ability to record, process, summarize and report
          financial information; and

     b)   any fraud, whether or not material, that involves management
          or other employees who have a significant role in the
          registrant's internal control over financial reporting.

Date:     October 27, 2004

                                   /s/C. R. Mackus
                                   Craig R. Mackus
                                   Chief Financial Officer,
                                   Controller and Secretary