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                                                                     Exhibit 5.5


                        [QUARLES & BRADY LLP LETTERHEAD]


                                                    May 15, 2003


Rexnord Corporation
4701 Greenfield Avenue
Milwaukee, WI 53214

Betzdorf Chain Company Inc.
4701 Greenfield Avenue
Milwaukee, WI 53214

Latham & Watkins LLP
555 Eleventh Street, N.W., Suite 1000
Washington, District of Columbia 20004-1304


         RE:      REGISTRATION STATEMENT ON FORM S-4 RELATING TO $225,000,000
                  AGGREGATE PRINCIPAL AMOUNT OF 10-1/8% SENIOR SUBORDINATED
                  NOTES DUE 2012


Ladies and Gentlemen:

         In connection with the registration of $225,000,000 aggregate principal
amount of 10-1/8% Senior Subordinated Notes due 2012 (the "Securities") by
Rexnord Corporation, a Delaware corporation (the "Company"), and each of the
other co-registrants thereto, and the guaranty of the Securities (the
"Guaranty") by Betzdorf Chain Company Inc. (the "Wisconsin Guarantor"), under
the Securities Act of 1933, as amended (the "Act"), on Form S-4 filed with the
Securities and Exchange Commission (the "Commission") on January 9, 2003,
and amended on March 19, 2003, April 17, 2003, May 14, 2003 and May 15, 2003
(File No. 333-102428), (the "Registration Statement"), you have requested our
opinion with respect to the matters set forth below. The Securities and the
Guaranty will be issued pursuant to an indenture dated as of November 25, 2002
(the "Indenture") by and among the Company, the parties listed on Schedule A
hereto (collectively, the "Guarantors") and Wells Fargo Bank Minnesota,
National Association, as Trustee (the "Trustee"). The Securities and the
Guaranty will be issued in exchange for the Company's outstanding 10?% Senior
Subordinated Notes due 2012 on the terms set forth in the prospectus contained
in the Registration Statement and the Letter of Transmittal filed as an exhibit
thereto. The Indenture, the Securities and the Guaranty are sometimes referred
to herein collectively as the "Operative Documents." Capitalized terms used
herein without definition have the meanings assigned to them in the Indenture.

         In our capacity as your special counsel in connection with such
registration, we are familiar with the proceedings taken by the Wisconsin
Guarantor in connection with the authorization and issuance of the Guaranty. In
addition, we have made such legal and factual examinations and inquiries,
including an examination of originals or copies certified or otherwise


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May 15, 2003
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identified to our satisfaction of such documents, corporate records and
instruments, as we have deemed necessary or appropriate for purposes of this
opinion.

         In our examination, we have assumed the genuineness of all signatures,
the authenticity of all documents submitted to us as originals, and the
conformity to authentic original documents of all documents submitted to us as
copies.

         We are opining herein as to the effect on the subject transaction only
of the federal laws of the United States, the internal laws of the State of
Wisconsin, and we express no opinion with respect to the applicability thereto,
or the effect thereon, of the laws of any other jurisdiction, or as to any
matters of municipal law or the laws of any local agencies within any state.

         Subject to the foregoing and the other matters set forth herein, it is
our opinion that, as of the date hereof, the Guaranty by the Wisconsin Guarantor
set forth in the Indenture has been duly authorized by all necessary corporate
action of the Wisconsin Guarantor and the Guaranty set forth in the Indenture
has been duly executed and delivered by the Wisconsin Guarantor.

         We consent to your filing this opinion as an exhibit to the
Registration Statement and to the reference to our firm contained under the
heading "Legal Matters" contained in the prospectus contained therein.

                                                     Very truly yours,

                                                     /s/ Quarles & Brady LLP

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                                   SCHEDULE A
<Table>
<Caption>

        NAME                                                         JURISDICTION
                                                              
1.      PT Components Inc.                                           Delaware
2.      RAC-I Inc.                                                   Delaware
3.      RBS Acquisition Corporation                                  Delaware
4.      RBS China Holdings L.L.C.                                    Delaware
5.      RBS Global Inc.                                              Delaware
6.      RBS North America Inc.                                       Delaware
7.      Rexnord Germany-1 Inc.                                       Delaware
8.      Rexnord International Inc.                                   Delaware
9.      Rexnord North America Holdings Inc.                          Delaware
10.     Winfred Berg Licensco Inc.                                   Delaware
11.     W.M. Berg Inc.                                               Delaware
12.     Prager Incorporated                                          Louisiana
13.     Addax Inc.                                                   Nebraska
14.     Clarkson Industries Inc.                                     New York
15.     Rexnord Ltd.                                                 Nevada
16.     Rexnord Puerto Rico Inc.                                     Nevada
17.     Betzdorf Chain Company Inc.                                  Wisconsin

</Table>