FORM 11-K


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549




[X]    ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF
       1934

For the fiscal year ended December 31, 2001

                                       OR

[ ]    TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
       ACT OF 1934

For the transition period from                 to
                               ---------------    ---------------


Commission file number 1-475


A.     Full title of the plan and the address of the plan, if different from
       that of the issuer named below:


                   A. O. Smith Profit Sharing Retirement Plan



B.     Name of issuer of the securities held pursuant to the plan and the
       address of its principal executive office:

                             A. O. Smith Corporation
                              11270 West Park Place
                               Milwaukee, WI 53224


                              REQUIRED INFORMATION



1.     Not Applicable.

2.     Not Applicable.

3.     Not Applicable.

4.     The A. O. Smith Profit Sharing Retirement Plan (the "Plan") is subject to
       the requirements of the Employee Retirement Income Security Act of 1974
       ("ERISA"). Attached hereto is a copy of the most recent financial
       statements and schedules of the Plan prepared in accordance with the
       financial reporting requirements of ERISA.


Exhibits

23.1     Consent of Independent Auditors





                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
trustees (or other persons who administer the Plan) have duly caused this annual
report to be signed by the undersigned thereunto duly authorized.

                                                A. O. Smith Profit Sharing
                                                  Retirement Plan



Date:      06/19/2002                           By: /s/ Duane R. Carlson
       ------------------------                    ------------------------
                                                    Duane R. Carlson
                                                    Manager Pension and Savings
                                                     Plan


                                TABLE OF CONTENTS





A. O. SMITH PROFIT SHARING RETIREMENT PLAN:




                                                                          Page

Independent Auditors' Report                                                1

Financial Statements

Exhibit "A" - Statements of Net Assets Available for Benefits               2

Exhibit "B" - Statements of Changes in Net Assets Available for Benefits    3


Notes to Financial Statements                                              4 - 8




                          INDEPENDENT AUDITORS' REPORT



Benefits Committee
A. O. Smith Profit Sharing Retirement Plan
Milwaukee, Wisconsin

      We have audited the accompanying statements of net assets available for
benefits of the A. O. Smith Profit Sharing Retirement Plan as of December 31,
2001 and 2000, and the related statement of changes in net assets available for
benefits for the years then ended. These financial statements are the
responsibility of the Plan's management. Our responsibility is to express an
opinion on these financial statements based on our audits.

      We conducted our audits in accordance with auditing standards generally
accepted in the United States of America. Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

      In our opinion, the financial statements, referred to above, present
fairly, in all material respects, the net assets available for benefits of the
Plan as of December 31, 2001 and 2000, and the changes in its net assets
available for benefits for the years then ended in conformity with accounting
principles generally accepted in the United States of America.






May 23, 2002
Milwaukee, Wisconsin                               REILLY, PENNER & BENTON LLP


                                       1

                 A. O. SMITH PROFIT SHARING RETIREMENT PLAN          Exhibit "A"
                            Milwaukee, Wisconsin

               Statements of Net Assets Available for Benefits
                         December 31, 2001 and 2000


                                                      2 0 0 1         2 0 0 0
                                                      -------         -------
Assets:

  Investments in Master Trust (Note 2):

    Investment options at fair value                $206,647,774    $224,580,200

    Participant loans receivable                       2,474,030       3,195,483
                                                    ------------    ------------
         Total investments                           209,121,804     227,775,683



Receivables:

  Company contributions                                1,413,020       2,136,502

  Due from brokers for securities transactions           549,521          90,119
                                                    ------------    ------------
         Total receivables                             1,962,541       2,226,621
                                                    ------------    ------------


Net assets available for benefits                   $211,084,345    $230,002,304
                                                    ============    ============



               The accompanying notes to the financial statements
                     are an integral part of this statement.


                                       2


                  A. O. SMITH PROFIT SHARING RETIREMENT PLAN         Exhibit "B"
                            Milwaukee, Wisconsin

          Statements of Changes in Net Assets Available for Benefits
                   Years Ended December 31, 2001 and 2000

                                                                  2 0 0 1           2 0 0 0
                                                                  -------           -------
                                                                           
Increases:

  Net income (loss) from the Master Trust:

    Investments                                                $ (17,388,233)    $  (3,737,341)

    Interest income from participant loans                           264,639           294,330
                                                               -------------     -------------
         Total income (loss)                                     (17,123,594)       (3,443,011)


Contributions:

  Company                                                          1,413,047         2,138,785

  Participants                                                     5,450,562         5,604,338

  Rollovers                                                          221,453           546,079
                                                               -------------     -------------
         Total contributions                                       7,085,062         8,289,202
                                                               -------------     -------------

             Total (decreases) increases                         (10,038,532)        4,846,191


Decreases:

  Benefit and withdrawal payments                                 25,040,817        24,130,510
                                                               -------------     -------------

                Change in net assets before transfers            (35,079,349)      (19,284,319)


Transfers from other plans                                        16,161,390         6,329,584
                                                               -------------     -------------

                Change in net assets available for benefits      (18,917,959)      (12,954,735)


Net assets available for benefits:

  Beginning of year                                              230,002,304       242,957,039
                                                               -------------     -------------

  End of year                                                  $ 211,084,345     $ 230,002,304
                                                               =============     =============




               The accompanying notes to the financial statements
                     are an integral part of this statement.


                                       3


                   A. O. SMITH PROFIT SHARING RETIREMENT PLAN
                              Milwaukee, Wisconsin

                          Notes to Financial Statements
                           December 31, 2001 and 2000

1.  Basis of Presentation and Significant Accounting Policies

      General

      The A. O. Smith Profit Sharing Retirement Plan was established in 1956 to
cover salaried or commissioned employees of the A. O. Smith Corporation, its
subsidiaries and affiliates. Employees are eligible to participate in the Plan
if they are scheduled to complete 1,000 hours of service in a Plan year.
Employees elect to participate by designating a portion of their salary to be
contributed to an account maintained on behalf of the participant. Participants
direct the investment of their contributions into various investment options
offered by the Plan (see Note 2).

      Participant Loans

      Participants may borrow from their fund accounts a minimum of $1,000 up to
a maximum of $50,000 or 50 percent of their account balance, whichever is less.
The loans are secured by the balance in the participant's account and bear
interest at rates which are commensurate with local prevailing rates as
determined by the Plan's Trustee.

      Investment Valuation

      All of the Plan's assets are held in the A. O. Smith Profit Sharing
Retirement Master Trust (Master Trust) (Note 2) which are recorded at fair
value. The financial statements of the Master Trust are presented separately and
are incorporated by reference to the financial statements of this Plan.

      Contributions and Benefit and Withdrawal Payments

      The Plan is a defined contribution plan to which participants may make
contributions of not less than 1% or more than 16% of their compensation. The
Plan provides for all participant contributions to be made with tax-deferred
dollars under Section 401(k) of the Internal Revenue Code. These contributions
are excluded from the participant's current wages for federal income tax
purposes. The Internal Revenue Code has set a maximum of $10,500 and $10,000 for
tax-deferred contributions that may be excluded for any individual participant
in both 2001 and 2000, respectively. No federal income tax is paid on the
tax-deferred contributions and growth thereon until the participant withdraws
them from the Plan.

      Contributions from participants are recorded when A. O. Smith Corporation
(the Company) makes payroll deductions from Plan participants. Contributions
from the Company are accrued in the period in which they become obligations of
the Company in accordance with terms of the Plan.

      For each $1.00 of 401(k) Tax-Deferred contributions, up to 6% of a
participant's salary, the Company guarantees a contribution of $.35. Additional
Company contributions in excess of $.35 will be based on the Company's return on
net worth. The additional Company matching contribution amount is $.05 times the
return on net worth between 5% and 10%, plus $.10 times the return on net worth
in excess of 10% up to a maximum of 18%. Therefore, the guaranteed and
additional contributions can combine for a maximum Company contribution of $1.40
of participant contributions up to 6% of salary.

      Vesting

      Participants of the Plan are 0% vested in employer contributions with less
than two years of participation, 40% vested after two years, 60% after three
years, 80% after four years and fully vested after five years of participation.
Participants are always fully vested in their own contributions.

                                       4

                   A. O. SMITH PROFIT SHARING RETIREMENT PLAN
                              Milwaukee, Wisconsin

                          Notes to Financial Statements
                           December 31, 2001 and 2000
                                   (Continued)

1.  Basis of Presentation and Significant Accounting Policies (Continued)

      Administrative Expense

      Administrative expenses are paid by the Plan and included as part of the
      net income (loss) from investments.

      Participant Account Provisions

      A separate account is maintained for each participant. The separate
account balances are adjusted periodically as follows:

      a.    Semi-monthly for participant's contributions.

      b.    Annually for Company contributions.

      c.    Daily for a proportionate share of increases and decreases in the
            fair value of Plan assets.

      d.    The accounts are periodically adjusted for forfeitures, which are
            reallocated to participants in the same manner as if they were a
            Company matching contribution for the Plan year. Forfeiture
            allocations for 2001 and 2000 amounted to $13,129 and $22,847,
            respectively.

      e.    Daily for benefit and withdrawal payments which consist of the
            following:

            i.    Upon retirement, death, disability, or termination of
                  employment resulting from permanent reduction of personnel, an
                  employee may withdraw any amount or the entire account balance
                  for any reason. At age 70 1/2, an account distribution
                  election must be made.

            ii.   Upon termination of employment for other reasons, the balance
                  in the separate account (reduced for nonvested Company
                  contributions and growth thereon based on years of service)
                  may be paid in a lump sum.

            iii.  An active participant age 59 1/2 or older may withdraw the
                  balance in the separate account. The balance in the separate
                  account is paid to the participant in a lump sum.

            iv.   A participant may withdraw all or any portion of the principal
                  balance attributable to after-tax contributions and earnings
                  and rollover contributions and earnings. All or any portion of
                  the balance attributable to Company contributions and earnings
                  may also be withdrawn if the participant has five full years
                  of employment with the Company.

            v.    A participant may withdraw at any time any amount attributable
                  to participant contributions and growth to purchase, prevent
                  eviction from or foreclosure on, a principal residence or to
                  pay certain expenses (namely post-secondary education and
                  unreimbursed medical expenses). Withdrawals may not include
                  earnings on 401(k) contributions posted to a participant's
                  account after 1988.

            vi.   No lump sum cash distribution in excess of $5,000 will be made
                  without the consent of the participant.

f.    Daily for investment allocation changes made by participants.

      Participants should refer to the Plan document for a more complete
description of the Plan's provisions.

                                       5

                   A. O. SMITH PROFIT SHARING RETIREMENT PLAN
                              Milwaukee, Wisconsin

                          Notes to Financial Statements
                           December 31, 2001 and 2000
                                   (Continued)

2.  A. O. Smith Profit Sharing Retirement Master Trust

      The Plan assets are held in the A. O. Smith Profit Sharing Retirement
Master Trust at the Marshall and Ilsley Trust Company. The Plan offers eight
investment vehicles in which participants may invest their account balances.
Shares of mutual funds are valued at the net asset value of shares held at year
end. Shares of common/collective trust funds are valued at the redemption price
established by the Trustee at year end. Participant loans receivable are valued
at cost which approximates fair value.

      The amount of Master Trust assets, income and change in value which is
allocated to the Plan is determined by the ratio of participant account balances
in the Plan to the total participant account balances of all participating
plans. The defined contribution plans participating in the Master Trust at
December 31, 2001, are the A. O. Smith Profit Sharing Retirement Plan, the A. O.
Smith Corporation Savings Plan and the A. O. Smith Retirement Savings Plan. At
December 31, 2001 and 2000, the Plan was allocated 88.356% and 92.987%,
respectively, of the Master Trust assets.

      Significant information related to the investments in the Master Trust as
of and for the year ended December 31, 2001, is as follows:



                                                   December 31,       2001        2001 Change in
                                                  2001 Balance    Income (Loss)        Value
                                                  ------------    -------------   --------------

                                                                          
a.  Register Investment Company Mutual Funds:

       American EuroPacific Growth Fund           $  5,046,096    $   (754,831)    $ (1,848,069)

       First American Growth and Income Fund        14,445,928      (3,320,668)      14,445,928

       Firstar Growth and Income Fund                     --           168,465      (21,534,277)

       Fidelity Aggressive Equity Portfolio         66,776,751     (17,812,882)      42,993,512

       Vanguard Institutional Index Trust Fund      19,477,210      (2,958,526)      (4,306,029)

       American Balanced Fund                       15,525,668         981,747        5,220,255

       First American Bond Fund                      5,020,591          74,261        5,020,591

       Firstar Bond Fund                                  --           218,245       (4,852,367)
                                                  ------------    ------------     ------------

            Subtotal                               126,292,244     (23,404,189)      35,139,544

b.  Common/Collective Trusts:

       A.O. Smith Stock Fund                         3,046,947         467,377         (937,110)

       A.O. Smith Stable Asset Income Fund         103,153,052       5,577,829       29,258,473
                                                  ------------    ------------     ------------

            Subtotal                               106,199,999       6,045,206       28,321,363

c.  Participant Loans Receivable                     4,097,691         394,656         (105,430)

d.  Cash                                                90,949            --             85,888
                                                  ------------    ------------     ------------

                Total                             $236,680,883    $(16,964,327)    $ 63,441,365
                                                  ============    ============     ============



                                       6

                   A. O. SMITH PROFIT SHARING RETIREMENT PLAN
                              Milwaukee, Wisconsin

                          Notes to Financial Statements
                           December 31, 2001 and 2000
                                   (Continued)

2.  A. O. Smith Profit Sharing Retirement Master Trust (Continued)

      Significant information related to the investments in the Master Trust as
of and for the year ended December 31, 2000, is as follows:


                                                      December 31,        2000        2000 Change in
                                                      2000 Balance    Income (Loss)        Value
                                                      ------------    -------------   --------------
                                                                              
a.  Register Investment Company Mutual Funds:
       American EuroPacific Growth Fund               $  6,894,165    $ (1,635,840)    $ (1,493,985)
       Firstar Growth and Income Fund                   21,534,277       1,001,425          246,940
       Fidelity Aggressive Equity Portfolio             95,498,405      (6,245,939)      (8,637,492)
       Vanguard Institutional Index Trust Fund          23,783,239      (2,311,113)      (1,596,486)
       Vanguard Fixed Income Short-Term Corp. Fund            --                 2             (189)
       American Balanced Fund                           10,305,413       1,296,152          772,530
       Firstar Bond Fund                                 4,852,367         457,143        1,297,698
                                                      ------------    ------------     ------------
            Subtotal                                   162,867,866      (7,438,170)      (9,410,984)

b.  Common/Collective Trusts:
       A.O. Smith Stock Fund                             3,984,057        (691,230)         519,435
       A.O. Smith Stable Asset Income Fund              73,894,579       4,322,470         (203,859)
                                                      ------------    ------------     ------------
            Subtotal                                    77,878,636       3,631,240          315,576

c.  Participant Loans Receivable                         4,203,121         367,066           38,563

d.  Cash                                                     5,061            --           (189,985)
                                                      ------------    ------------     ------------

                Total                                 $244,954,684    $ (3,439,864)    $ (9,246,830)
                                                      ============    ============     ============


3.  Investments

      Investments held by the Plan at December 31, that represents 5% or more of
the Plan's net assets are as follows:


                                                                              December 31,
                                                                   ------------------------------------
                                                                       2 0 0 1               2 0 0 0
                                                                      ---------             ---------

                                                                                  
Firstar Growth and Income Fund, -0- and 503,487.639                $           ---      $    20,542,296
 shares, respectively
Fidelity Aggressive Equity Fund, 112,230.530                            65,443,687           92,070,560
 and 115,623.460 shares, respectively
Vanguard Institutional Index Fund, 175,458.466                          16,746,650           21,181,346
 and 170,341.449 shares, respectively
A.O. Smith Stable Asset Income Fund, 4,157,779.835                      83,351,313           66,400,799
 and 4,541,454.475 shares, respectively
First American Growth and Income Fund, 404,048.963                      13,733,624                  ---
 and -0- shares, respectively
American Balanced Fund, 932,517.173                                     14,780,397            9,266,926
 and 599,025.577 shares, respectively


                                       7

                   A. O. SMITH PROFIT SHARING RETIREMENT PLAN
                              Milwaukee, Wisconsin

                          Notes to Financial Statements
                           December 31, 2001 and 2000
                                   (Continued)

4.  Income Tax Status

      The Plan obtained its latest determination letter on October 21, 1999, in
which the Internal Revenue Service stated the Plan as then designed, was in
compliance with the applicable requirements of the Internal Revenue Code. The
Plan administrator and the Plan's tax counsel believe that the Plan is currently
designed and being operated in compliance with the applicable requirements of
the Internal Revenue Code. Therefore, no provision for income taxes has been
included in the Plan's financial statements.

5.  Plan Termination

      While the Company has not expressed any intent to terminate the Plan, it
is free to do so at any time. In the event of termination, each participant
automatically becomes vested to the extent of the balance in his separate
account.

6.  Use of Estimates

      The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts in the financial statements. Actual
results could differ from those estimates.


                                       8