<Page>

                                                                    EXHIBIT 3.15

                                                              FILING FEE: 850.00
[SEAL]

                            ARTICLES OF INCORPORATION
                                       OF
                            REXNORD PUERTO RICO INC.

                                    * * * * *

          FIRST. The name of the corporation is

                            REXNORD PUERTO RICO INC.

          SECOND. Its principal office in the State of Nevada is located at One
East First Street, Reno, Washoe County, Nevada 89501. The name and address of
its resident agent is The Corporation Trust Company of Nevada, One East First
Street, Reno, Nevada 89501.

          THIRD. The nature of the business, or objects or purposes proposed to
be transacted, promoted or carried on are:

<Page>

          To engage in any lawful activity and to manufacture, purchase or
otherwise acquire, invest in, own, mortgage, pledge, sell, assign and transfer
or otherwise dispose of, trade, deal in and deal with goods, wares and
merchandise and personal property of every class and description.

          To hold, purchase and convey real and personal estate and to mortgage
or lease any such real and personal estate with its franchises and to take the
same by devise or bequest.

          To acquire, and pay for in cash, stock or bonds of this corporation or
otherwise, the good will, rights, assets and property, and to undertake or
assume the whole or any part of the obligations or liabilities of any person,
firm, association or corporation.

          To acquire, hold, use, sell, assign, lease, grant licenses in respect
of, mortgage, or otherwise dispose of letters patent of the United States or any
foreign country, patent rights, licenses and privileges, inventions,
improvements and processes, copyrights, trade-marks and trade names, relating to
or useful in connection with any business of this corporation.

          To guarantee, purchase, hold, sell, assign, transfer, mortgage,
pledge or otherwise dispose of the shares of the capital stock of or any bonds,
securities or evidences of the indebtedness created by any other corporation or
corporations of this state, or any other state or government, and, while owner
of such stock, bonds, securities or evidences of indebtedness, to exercise all
the rights, powers

<Page>

and privileges of ownership, including the right to vote, if any.

          To borrow money and contract debts when necessary for the transaction
of its business, or for the exercise of its corporate rights, privileges or
franchises, or for any other lawful purpose of its incorporation; to issue
bonds, promissory notes, bills of exchange, debentures, and other obligations
and evidences of indebtedness, payable at specified time or times, or payable
upon the happening of a specified event or events, whether secured by mortgage,
pledge, or otherwise, or unsecured, for money borrowed, or in payment for
property purchased, or acquired, or for any other lawful objects.

          To purchase, hold, sell and transfer shares of its own capital stock,
and use therefor its capital, capital surplus, surplus, or other property or
funds; provided it shall not use its funds or property for the purchase of its
own shares of capital stock when such use would cause any impairment of its
capital; and provided further, that shares of its own capital stock belonging to
it shall not be voted upon, directly or indirectly, nor counted as outstanding,
for the purpose of computing any stockholders' quorum or vote.

          To conduct business, have one or more offices, and hold, purchase,
mortgage and convey real and personal property in this state, and in any of the
several states, territories, possessions and dependencies of the United States,
the District of Columbia, and in any foreign countries.

<Page>

          To do all and everything necessary and proper for the accomplishment
of the objects hereinbefore enumerated or necessary or incidental to the
protection and benefit of the corporation, and, in general, to carry on any
lawful business necessary or incidental to the attainment of the objects of the
corporation, whether or not such business is similar in nature to the objects
hereinbefore set forth.

          The objects and purposes specified in the foregoing clauses shall,
except where otherwise expressed, be in nowise limited or restricted by
reference to or inference from the terms of any other clause in these articles
of incorporation, but the objects and purposes specified in each of the
foregoing clauses of this article shall be regarded as independent objects and
purposes.

          FOURTH. The amount of the total authorized capital stock of the
corporation is One Thousand ($1,000.00) Dollars consisting of One Hundred (100)
Shares of stock of the par value of Ten ($10.00) Dollar each.

<Page>

          FIFTH. The governing board of this corporation shall be known as
directors, and the number of directors may from time to time be increased or
decreased in such manner as shall be provided by the by-laws of this
corporation, provided that the number of directors shall not be reduced to less
than three (3), except that in cases where all the shares of the corporation are
owned beneficially and of record by either one or two stockholders, the number
of directors may be less than three (3) but not less than the number of
stockholders.

          The names and post-office addresses of the first board of directors,
which shall be three (3) in number, are as follows:

          NAME                                       POST-OFFICE ADDRESS
          ----                                       -------------------
 W. E. SCHAUER                                       4701 West Greenfield Avenue
                                                     Milwaukee, Wisconsin 53201

 E. W. MENTZER                                       4701 West Greenfield Avenue
                                                     Milwaukee, Wisconsin 53201

 J. J. HAYDEN                                        4701 West Greenfield Avenue
                                                     Milwaukee, Wisconsin 53201

          SIXTH. The capital stock, after the amount of the subscription price,
or par value, has been paid in shall not be subject to assessment to pay the
debts of the corporation.

          SEVENTH. The name and post-office address of each of the incorporators
signing the articles of incorporation are as follows:

<Page>

          NAME                                       POST-OFFICE ADDRESS
          ----                                       -------------------
 V. Miller                                           P. O. Box 2311
                                                     Reno, Nevada

 C. Kost                                             P. O. Box 2311
                                                     Reno, Nevada

 J. Stephenson                                       P. O. Box 2311
                                                     Reno, Nevada

          EIGHTH. The corporation is to have perpetual existence.

          NINTH. In furtherance and not in limitation of the powers conferred by
statute, the board of directors is expressly authorized:

          Subject to the by-laws, if any, adopted by the stockholders, to make,
alter or amend the by-laws of the corporation.

          To fix the amount to be reserved as working capital over and above its
capital stock paid in, to authorize and cause to be executed mortgages and liens
upon the real end personal property of this corporation.

          By resolution passed by a majority of the whole board, to designate
one (1) or more committees, each committee to consist of one (1) or more of the
directors of the corporation, which, to the extent provided in the resolution or
in the by-laws of the corporation, shall have and may exercise the powers of the
board of directors in the management of the business and affairs of the
corporation, and may authorize the seal of the corporation to be affixed to all
papers which may require it. Such committee or committees shall have such name
or names as may be stated in

<Page>

the by-laws of the corporation or as may be determined from time to time by
resolution adopted by the board of directors.

          When and as authorized by the affirmative vote of stockholders holding
stock entitling them to exercise at least a majority of the voting power given
at a stockholders' meeting called for that purpose, or when authorized by the
written consent of the holders of at least a majority of the voting stock issued
and outstanding, the board of directors shall have power and authority at any
meeting to sell, lease or exchange all of the property and assets of the
corporation, including its good will and its corporate franchises, upon such
terms and conditions as its board of directors deem expedient and for the best
interests of the corporation.

          TENTH. Meetings of stockholders may be held outside the State of
Nevada, if the by-laws so provide. The books of the corporation may be kept
(subject to any provision contained in the statutes) outside the State of Nevada
at such place or places as may be designated from time to time by the board of
directors or in the by-laws of the corporation.

          ELEVENTH. This corporation reserves the right to amend, alter, change
or repeal any provision contained in the articles of incorporation, in the
manner now or hereafter prescribed by statute, or by the articles of
incorporation, and all rights conferred upon stockholders herein are granted
subject to this reservation.

<Page>

          WE, THE UNDERSIGNED, being each of the incorporators hereinbefore
named for the purpose of forming a corporation pursuant to the General
Corporation Law of the State of Nevada, do make and file these articles of
incorporation, hereby declaring and certifying that the facts herein stated are
true, and accordingly have hereunto set our hands this 14th day of June 1978.

                                                     /s/ V. Miller
                                                     ---------------------------
                                                     V. Miller

                                                     /s/ C. Kost
                                                     ---------------------------
                                                     C. Kost

                                                     /s/ J. Stephenson
                                                     ---------------------------
                                                     J. Stephenson

<Page>

STATE OF NEVADA    )
                   )    SS:
COUNTY OF WASHOE   )

          On this 14th day of June, 1978, before me, a Notary Public,
personally appeared V. Miller, C. Kost, and J. Stephenson, who severally
acknowledged that they executed the above instrument.

                                                     /s/       [ILLEGIBLE]
                                                     ---------------------------
                                                            Notary Public
                                                               (Stamp)

                                                                [SEAL]