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, 1996

                                       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:    July 15, 1997             By:   /S/ Duane R. Carlson   
                                      Duane R. Carlson
                                      Manager Pension and Savings Plan

   

                                    CONTENTS


   A. O. Smith Profit Sharing Retirement Plan:

     Independent Auditors' Report
  
                                                                   Page
     Financial statements

       Statement of net assets available for benefits               1

       Statement of changes in net assets available
         for benefits                                               2

       Notes to financial statements                                3-11


     Supplementary information


         A schedule of party-in-interest transactions has not been presented
         because there were no party-in-interest transactions which are
         prohibited by ERISA Section 406 and for which there is no statutory
         or administrative exemption.

   


                          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 Corporation Profit Sharing Retirement Plan as
   of December 31, 1996 and 1995, and the related statement of changes in net
   assets available for benefits for the year ended December 31, 1996. 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.

   Except as discussed in the following paragraph, we conducted our audits in
   accordance with generally accepted auditing standards.  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.

   As permitted by 29 CFR 2520.103-8 of the Department of Labor's Rules and
   Regulations for Reporting and Disclosure under the Employee Retirement
   Income Security Act of 1974, investment assets held by M&I Trust Company,
   Milwaukee, Wisconsin, the trustee of the Plan, and transactions in those
   assets were excluded from the scope of our audit of the Plan's 1995
   financial statements, except for comparing the information provided by the
   trustee, which is summarized in Note 4, with the related information
   included in the financial statements.

   Because of the significance of the information that we did not audit, we
   are unable to, and do not, express an opinion on the Plan's financial
   statements as of December 31, 1995.  The form and content of the
   information included in the 1995 financial statements, other than that
   derived from the information certified by the trustee, have been audited
   by us and, in our opinion, are presented in compliance with the Department
   of Labor's Rules and Regulations for Reporting and Disclosure under the
   Employee Retirement Income Security Act of 1974.

   In our opinion, the financial statements, referred to above, of the A. O.
   Smith Corporation Profit Sharing and Retirement Plan as of December 31,
   1996, and for the year then ended present fairly, in all material
   respects, the financial status of the A. O. Smith Corporation Profit
   Sharing and Retirement Plan as of December 31, 1996, and the changes in
   its financial status for the year then ended in conformity with generally
   accepted accounting principles.



   July 14, 1997                        Reilly, Penner & Benton LLP
   Milwaukee, Wisconsin

   

                   A. O. SMITH PROFIT SHARING RETIREMENT PLAN

                 STATEMENT OF NET ASSETS AVAILABLE FOR BENEFITS

                                                  December 31,
                                              1996            1995      
   Assets:

   Investment in A. O. Smith Master
     Trust at fair market value 
     (Notes 2 and 3)                     $172,613,605      $144,663,057
   Participant loans at estimated 
     fair market value                      3,815,476         3,548,289
                                         ------------       -----------
          Total                           176,429,081       148,211,346

   Receivables:
     Due from broker for securities
       sold                                   119,773                --
     Interest income                          123,846           126,587
     Company contribution                   5,261,788         5,147,600
                                          -----------       -----------
     Total receivables                      5,505,407         5,274,187
                                          -----------       -----------
   Net assets available
     for benefits                        $181,934,488      $153,485,533
                                          ===========       ===========


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


   

               A. O. SMITH PROFIT SHARING RETIREMENT PLAN

       STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS

                                           Years Ended December 31          

   Additions:                                 1996          1995      

      Investment in A. O. Smith Master
          Trust at fair market value:
            Net investment income       $   2,388,593    $   2,327,642
            Realized gain on
              investment transactions      16,191,765       10,131,498
            Unrealized appreciation on
              investments                   4,085,625       15,127,258
                                         ------------      -----------
                Total                      22,665,983       27,586,398

      Interest income from participant
          loans at estimated 
          fair market value                   291,769          239,510
                                         ------------      -----------
          Total investment income          22,957,752       27,825,908
                                         ------------      -----------

      Contributions:
          Company                           5,261,788        5,147,600
          Participants                      8,682,069        7,244,964
                                         ------------      -----------
          Total contributions              13,943,857       12,392,564
                                         ------------      -----------
   Total additions                         36,901,609       40,218,472

   Decreases:

      Benefit and withdrawal payments       9,007,833        7,904,107
                                          -----------      -----------
          Net increase before transfers    27,893,776       32,314,365

      Transfers from (to) other plans         555,179          (98,289)
                                          -----------      -----------
            Increase in net assets
            available for benefits         28,448,955       32,216,076

   Net assets available for
      benefits:
          Beginning of the year           153,485,533      121,269,457
                                          -----------      -----------
          End of the year                $181,934,488     $153,485,533
                                          ===========      ===========

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

   


               A. O. SMITH PROFIT SHARING RETIREMENT PLAN
                     NOTES TO FINANCIAL STATEMENTS

                       December 31, 1996 and 1995

   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 nonunion employees of the A. O.
   Smith Corporation, its subsidiaries and affiliates.  Employees will be
   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.

   Investment valuation - All of the Plan's investments are invested in the
   A. O. Smith Corporation Profit Sharing Retirement Master Trust (Master
   Trust) (Note 2) which are valued at market price.  The financial
   statements of the Master Trust are presented separately and are
   incorporated by reference to the financial statements of this Plan.  The
   investments in the A. O. Smith Income Fund and the A. O. Smith Stable
   Asset Income Fund are valued at the redemption price established by the
   trustee.  Participant loans receivable are valued at cost which
   approximates fair market value.

   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 $9,500 for tax-
   deferred contributions that may be excluded for any individual participant
   in 1996.  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.

   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
       market value of Plan assets.

   d.  The accounts are periodically adjusted for forfeitures which are
       used to pay plan expenses by an equivalent amount.

   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.  One withdrawal of this type is
                  allowed per calendar year, up to age 70 1/2.  At 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 $3,500 will be
                  made without the consent of the participant.

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

   Realized gains and losses - The realized gains and losses recognized on
   the financial statements are calculated by comparing the sales proceeds to
   the original cost of the investment as prescribed by generally accepted
   accounting principals.  The realized gains and losses recognized in the
   Form 5500 (annual federal filing) are recalculated by comparing the sales
   proceeds to the value of the investment at the beginning of the plan year. 
   If the investment is purchased in the same year as the sale, the gain or
   loss is calculated by comparing the sales proceeds to the purchase price.

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

   The Plan assets are held in the A. O. Smith Corporation Profit Sharing
   Retirement Master Trust at the Marshall and Ilsley Trust Company.  The
   Plan offers nine investment vehicles in which participants may invest
   their account balances.  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 are the A. O. Smith Profit Sharing
   Retirement Plan, the A. O. Smith Employee Savings Plan, the A. O. Smith
   Employee 401(k) Savings Plan, the A. O. Smith Saving and Investment Plan
   and the A. O. Smith Savings and Security Plan.

   Significant information related to the investments in the Master Trust as
   of and for the year ended December 31, 1996 is as follows:

   a.  Registered Investment Company Mutual Funds:
                                          
                                  December 31,         1996      1996 Change
                                 1996 Balance         Income      in Value

   American EuroPacific
     Growth Fund                 $  7,100,668     $   916,381   $  4,624,948
   Portico Growth and 
     Income Fund                   30,048,024       5,460,381     11,419,672
   Fidelity Aggressive Equity
     Portfolio                     96,212,023      18,300,687     16,257,499
   Vanguard Institutional Index
     Trust Fund                    21,674,023       4,139,955      4,471,527
   Vanguard Fixed Income 
     Short-term Corp. Fund          7,440,943         352,530       (834,561)

   American Balanced Fund          16,146,773       1,848,768      1,454,649
                                  -----------     -----------     ----------
   Sub-total                      178,622,454      31,018,702     37,393,734
                                  -----------     -----------     ----------

   b.  Common/Collective Trusts:

   A. O. Smith Stock Fund           1,049,076          54,462      1,049,076
   A. O. Smith Stable Asset
     Income Fund                   50,029,586       2,611,898      5,486,903
                                  -----------      ----------      ---------
     Sub-total                     51,078,662       2,666,360      6,535,979
                                  -----------      ----------      ---------

   c.  Short-term, High quality
       liquid securities:

   A. O. Smith Income Fund         62,301,690       3,295,061       (157,519)
                                  -----------      ----------     ----------
       Total                     $292,002,806    $ 36,980,123    $43,772,194
                                  ===========      ==========     ==========

   Significant information related to the investments in the Master Trust as
   of and for the year ended December 31, 1995 is as follows:

   a.  Registered Investment Company Mutual Funds:
                                                   
                                December 31,         1995        1995 Change
                                1995 Balance        Income        in Value   

   American EuroPacific
     Growth Fund              $  2,475,721      $   317,793    $  2,475,721
   Portico Growth and Income
     Fund                       18,628,351        4,386,363       7,937,150
   Fidelity Aggressive Equity
     Portfolio                  79,954,524       25,193,614      31,270,200
   Vanguard Institutional Index
     Trust Fund                 17,202,495        3,990,634       9,593,710
   Vanguard Fixed Income Short-
     term Corp. Fund             8,275,505          877,389       1,626,901
   American Balanced Fund       14,692,124        2,533,453       6,970,196
                              ------------     ------------      ----------

       Sub-total               141,228,720       37,299,246      59,873,878
                              ------------     ------------      ----------

   b.  Common/Collective Trusts:

   A. O. Smith Stable Asset
     Income Fund                44,542,683       2,861,853       (3,633,702)
                              ------------     -----------       ----------

   c.  Short-term, High quality
       liquid securities:

   A. O. Smith Income Fund      62,459,209      3,797,254        (1,581,077)
                              ------------     ----------        ----------

         Total                $248,230,612    $43,958,353       $54,659,099
                              ============     ==========        ==========

   At December 31, 1996 and 1995 the Plan was allocated 59.114% and 58.278%,
   respectively, of the Master Trust assets.

   3.  Investments

   
   Investments held by the Plan at December 31, are as follows:
   
1996 1995 Fair Fair Market Market Investments: Cost Value Cost Value A. O. Smith Corporation Profit Sharing Retirement Master Trust: American EuroPacific Growth Fund $ 4,086,625 $ 4,335,674 $ 1,229,332 $ 1,281,247 A.O. Smith Stock Fund 985,871 1,049,076 -- -- A. O. Smith Income Fund 27,080,989 27,080,989(1) 26,174,241 26,174,241(1) Portico Growth and Income Fund 17,376,824 20,503,275(1) 11,216,735 13,592,574(1) Fidelity Aggressive Equity Portfolio 39,597,934 59,954,423(1) 32,573,846 50,608,538(1) Vanguard Institutional Index Trust Fund 9,590,937 12,094,566(1) 7,293,196 8,911,078(1) Vanguard Fixed Income Short-Term Corp. Fund 4,578,329 4,592,607 4,645,506 4,732,120 American Balanced Fund 9,164,987 9,494,758(1) 7,594,638 8,048,622(1) A. O. Smith Stable Asset Income Fund 31,164,037 33,508,237(1) 29,034,115 31,314,637(1) ----------- ------------- ----------- ------------- Total $143,626,533 $172,613,605 $119,761,609 $144,663,057 =========== ============= ============ ============= (1) - Investments representing at least 5% of the net assets available for benefits.
During 1996 and 1995, the Plan's investments appreciated (depreciated) in value by $4,085,625 and $15,127,258, respectively, as follows: 1996 1995 Investments: A. O. Smith Corporation Profit Sharing Retirement Master Trust: American EuroPacific Growth Fund $ 197,135 $ 51,915 A.O. Smith Stock Fund 63,205 -- A.O. Smith Income Fund -- -- Portico Growth and Income Fund 750,612 2,080,322 Fidelity Aggressive Equity Portfolio 2,321,797 10,495,489 Vanguard Institutional Index Trust Fund 885,748 1,471,100 Vanguard Fixed Income Short-Term Corp. Fund (72,336) 220,844 American Balanced Fund (124,214) 653,459 A. O. Smith Stable Asset Income Fund 63,678 154,129 ------------ ----------- Total $ 4,085,625 $15,127,258 ============ =========== The Plan provides that contributions to the plan will be invested in certain individual programs as directed by each participant. Amounts included in net assets and changes in net assets in the accompanying financial statements by investment programs at December 31, are as follows:
1996 Investment Benefits at Fair Investment Paid to Market Value Income Contributions Participants American EuroPacific Growth Fund $ 4,335,674 $ 538,426 $ 290,930 $ 28,152 A.O. Smith Stock Fund 1,049,076 54,462 575,866 4,893 Vanguard Fixed Income Short-term Corp. Fund 4,592,607 221,195 356,823 404,969 Fidelity Aggressive Equity Portfolio 59,954,423 11,788,511 4,759,650 2,106,926 A. O. Smith Stable Asset Income Fund 33,508,237 1,782,890 1,351,102 2,420,236 Vanguard Institutional Index Trust Fund 12,094,566 2,230,077 1,001,804 471,728 A. O. Smith Income Fund 27,080,989 1,457,976 3,350,083 2,162,579 American Balanced Fund 9,494,758 1,071,662 859,542 380,968 Portico Growth and Income Fund 20,503,275 3,812,553 1,398,057 1,027,382 ------------ ------------ ----------- ----------- Total $172,613,605 $22,957,752 $13,943,857 $9,007,833 ============ =========== =========== =========== 1995 Investment Benefits at Fair Investment Paid to Market Value Income Contributions Participants American EuroPacific Growth Fund $ 1,281,247 $ 145,383 $ 151,486 $ 5,529 Vanguard Fixed Income Short- term Corp. Fund 4,732,120 486,639 389,453 156,232 Fidelity Aggressive Equity Portfolio 50,608,538 16,739,241 3,933,586 1,453,354 A. O. Smith Stable Asset Income Fund 31,314,637 1,975,779 1,942,057 2,524,803 Vanguard Institutional Index Trust Fund 8,911,078 2,112,976 694,970 143,842 A. O. Smith Income Fund 26,174,241 1,701,063 3,443,933 2,780,799 American Balanced Fund 8,048,622 1,373,941 719,771 426,777 Portico Growth and Income Fund 13,592,574 3,290,886 1,117,308 412,771 ------------ ------------ ----------- ----------- Total $144,663,057 $27,825,908 $12,392,564 $7,904,107 ============ ============ =========== ===========
4. Information certified by trustee The plan administrator has elected the method of annual reporting compliance permitted by Section 2520-103.8 of the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. Accordingly, the Plan's independent public accountants, Reilly, Penner & Benton LLP, did not perform any generally accepted auditing procedures with respect to the Plan's funds on deposit with Marshall and Ilsley Trust Company, Milwaukee, Wisconsin, the Plan's Trustee, or the interest credited to that deposit. 5. Income tax status The Plan obtained its latest determination letter on April 27, 1995, 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 has been amended since receiving the determination letter. However, 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, they believe that the Plan was qualified and the related trust was tax-exempt as of the financial statement date. 6. 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. 7. 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. Subsequent event On January 27, 1997, the Company reached a definitive agreement to sell its automotive products operations. Closing occurred in the second quarter and is subject to customary conditions. As soon as administratively feasible, the account balances of employees affected by this transaction will be directly transferred to the purchaser's defined contribution plan. EXHIBIT INDEX Exhibit No. Name 23.1 Consent of Independent Auditors
                                                        EXHIBIT 23.1


            CONSENT OF REILLY, PENNER & BENTON LLP


We consent to the incorporation by reference in the Registration Statement
(Form S-8 No. 333-05799) pertaining to the A.O. Smith Profit Sharing
Retirement Plan (the Plan) of our report dated July 14, 1997, with respect
to the financial statements and schedules of the Plan included in this 
Annual Report (Form 11-K) for the year ended December 31, 1996.



Milwaukee, Wisconsin                      REILLY, PENNER & BENTON LLP
July 15, 1997