SCHEDULE 13G  

Amendment No. 2  
Duriron Company Incorporated  
Common Stock  
Cusip # 266849108  

Cusip # 266849108  
Item 1: Reporting Person - FMR Corp. - (Tax ID:  04-2507163)  
Item 4: Commonwealth of Massachusetts  
Item 5: 744,300  
Item 6: None  
Item 7: 3,123,050  
Item 8: None  
Item 9: 3,123,050  
Item 11:        13.31%  
Item 12:        HC   

Cusip # 266849108  
Item 1: Reporting Person - Edward C. Johnson 3d   
Item 4: United States of America  
Item 5: None  
Item 6: None  
Item 7: 3,123,050  
Item 8: None  
Item 9: 3,123,050  
Item 11:        13.31%  
Item 12:        IN   

Cusip # 266849108  
Item 1: Reporting Person - Abigail P. Johnson   
Item 4: United States of America  
Item 5: None  
Item 6: None  
Item 7: 3,123,050  
Item 8: None  
Item 9: 3,123,050  
Item 11:        13.31%  
Item 12:        IN   

SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS  
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)  

Item 1(a).      Name of Issuer:  

Duriron Company Incorporated  

Item 1(b).      Name of Issuer's Principal Executive Offices:  

3100 Research Boulevard   
Dayton, OH  45420-4005  

Item 2(a).      Name of Person Filing:   

FMR Corp.  

Item 2(b).      Address or Principal Business Office or, if None, Residence:  

82 Devonshire Street, Boston, Massachusetts  02109  

Item 2(c).      Citizenship:  

Not applicable  

Item 2(d).      Title of Class of Securities:  

Common Stock  

Item 2(e).      CUSIP Number:    

266849108  

Item 3. This statement is filed pursuant to Rule 13d-1(b) or 13d-2(b) and the  
person filing, FMR Corp., is a parent holding company in accordance  
with Section 240.13d-1(b)(ii)(G).  (Note:  See Item 7).  

Item 4. Ownership  

(a)     Amount Beneficially Owned: 
3,123,050  

(b)     Percent of Class: 
13.31%  

(c)     Number of shares as to which such person has:    

(i)     sole power to vote or to direct the vote: 
744,300  

(ii)    shared power to vote or to direct the vote: 
None  

(iii)   sole power to dispose or to direct the disposition of: 
3,123,050  

(iv)    shared power to dispose or to direct the disposition of: 
None  

Item 5. Ownership of Five Percent or Less of a Class.  

Not applicable.  

Item 6. Ownership of More than Five Percent on Behalf of Another Person.  

Various persons have the right to receive or the power to  
direct the receipt of dividends from, or the proceeds from the  
sale of, the common stock of Duriron Company Incorporated.  The  
interest of one person, Fidelity Magellan Fund, an investment  
company registered under the Investment Company Act of 1940, in  
the common stock of Duriron Company Incorporated, amounted to  
1,623,900 shares or 6.92% of the total outstanding common stock  
at December 31, 1996.    

Item 7. Identification and Classification of the Subsidiary Which Acquired  
the Security Being Reported on By the Parent Holding Company.  

See attached Exhibit(s) A, B, and C.  

Item 8. Identification and Classification of Members of the Group.  

Not applicable, see attached Exhibit A.   

Item 9. Notice of Dissolution of Group.  

Not applicable.  

Item 10.        Certification.  

By signing below I certify that, to the best of my knowledge  
and belief, the securities referred to above were acquired in  
the ordinary course of business and were not acquired for the  
purpose of and do not have the effect of changing or  
influencing the control of the issuer of such securities and  
were not acquired in connection with or as a participant in any  
transaction having such purpose or effect.  

Signature  

After reasonable inquiry and to the best of my knowledge and  
belief, I certify that the information set forth in this  
Schedule 13G in connection with FMR Corp.'s beneficial  
ownership of the common stock of Duriron Company Incorporated  
at December 31, 1996 is true, complete and correct.   

February 14, 1997         
Date  

/s/Arthur S. Loring  
Signature  

Arthur S. Loring, Vice  
President         
Name/Title  

SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS  
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)  

Pursuant to the instructions in Item 7 of Schedule 13G, Fidelity  
Management & Research Company ("Fidelity"), 82 Devonshire Street, Boston,  
Massachusetts 02109, a wholly-owned subsidiary of FMR Corp. and an investment  
adviser registered under Section 203 of the Investment Advisers Act of 1940,  
is the beneficial owner of 2,396,050 shares or 10.21% of the common stock  
outstanding of Duriron Company Incorporated ("the Company") as a result of  
acting as investment adviser to various investment companies registered under  
Section 8 of the Investment Company Act of 1940.    

The ownership of one investment company, Fidelity Magellan Fund, amounted  
to 1,623,900 shares or 6.92% of the common stock outstanding.  Fidelity  
Magellan Fund has its principal business office at 82 Devonshire Street,  
Boston, Massachusetts 02109.    

Edward C. Johnson 3d, FMR Corp., through its control of Fidelity, and the  
funds each has sole power to dispose of the 2,378,750 shares owned by the  
Funds.  

Neither FMR Corp. nor Edward C. Johnson 3d, Chairman of FMR Corp., has  
the sole power to vote or direct the voting of the shares owned directly by  
the Fidelity Funds, which power resides with the Funds' Boards of Trustees.   
Fidelity carries out the voting of the shares under written guidelines  
established by the Funds' Boards of Trustees.  

Fidelity Management Trust Company, 82 Devonshire Street, Boston,  
Massachusetts 02109, a wholly-owned subsidiary of FMR Corp. and a bank as  
defined in Section 3(a)(6) of the Securities Exchange Act of 1934, is the  
beneficial owner of 727,000 shares or 3.10% of the common stock outstanding of  
the Company as a result of its serving as investment manager of the  
institutional account(s).    

Edward C. Johnson 3d and FMR Corp., through its control of Fidelity  
Management Trust Company, each has sole voting and dispositive power over  
727,000 shares of common stock owned by the institutional account(s) as  
reported above.  

Members of the Edward C. Johnson 3d family and trusts for their benefit  
are the predominant owners of Class B shares of common stock of FMR Corp.,  
representing approximately 49% of the voting power of FMR Corp.  Mr. Johnson  
3d owns 12.0% and Abigail Johnson owns 24.5% of the aggregate outstanding  
voting stock of FMR Corp.  Mr. Johnson 3d is Chairman of FMR Corp. and Abigail  
P. Johnson is a Director of FMR Corp.  The Johnson family group and all other  
Class B shareholders have entered into a shareholders' voting agreement under  
which all Class B shares will be voted in accordance with the majority vote of  
Class B shares.  Accordingly, through their ownership of voting common stock  
and the execution of the shareholders' voting agreement, members of the  
Johnson family may be deemed, under the Investment Company Act of 1940, to  
form a controlling group with respect to FMR Corp.    

Fidelity International Limited, Pembroke Hall, 42 Crowlane, Hamilton,  
Bermuda, and various foreign-based subsidiaries provide investment advisory  
and management services to a number of non-U.S. investment companies (the  
"International Funds") and certain institutional investors.  Fidelity  
International Limited is also the beneficial owner of 17,300 shares or 0.07%  
of the common stock outstanding of the Company.  Additional information with  
respect to the beneficial ownership of Fidelity International Limited is shown  
on Exhibit B, page 1.  

SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS  
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)  

Pursuant to instructions in Item 7 of Schedule 13G, this Exhibit has been  
prepared  to identify Fidelity International Limited, Pembroke Hall, 42 Crow  
Lane, Hamilton, Bermuda, a Bermudian joint stock company incorporated for an  
unlimited duration by private act of the Bermuda Legislature (FIL) and an  
investment adviser to various investment companies (the "International Funds")  
and certain institutional investors, as the beneficial owner of 17,300 shares  
or 0.07% of the common stock outstanding of Duriron Company Incorporated.  

Prior to June 30, 1980, FIL was a majority-owned subsidiary of Fidelity  
Management & Research Company (Fidelity), a wholly-owned subsidiary of FMR  
Corp.  On that date, the shares of FIL held by Fidelity were distributed, as a  
dividend,  to the shareholders of FMR Corp.  FIL currently operates as an  
entity independent of FMR Corp. and Fidelity.  The International Funds and  
FIL's other clients, with the exception of Fidelity and an affiliated company  
of Fidelity, are non-U.S. entities.  

A partnership controlled by Edward C. Johnson 3d and members of his  
family owns shares of FIL voting stock with the right to cast approximately  
47.22% of the total votes which may be cast by all holders of FIL voting  
stock.  Mr. Johnson 3d is Chairman of FMR Corp. and FIL.  FMR Corp. and FIL  
are separate and independent corporate entities, and their Boards of Directors  
are generally composed of different individuals.  Other than when one serves  
as a sub adviser to the other, their investment decisions are made  
independently, and their clients are generally different organizations.  

FMR Corp. and FIL are of the view that they are not acting as a "group"  
for purposes of Section 13(d) under the Securities Exchange Act of 1934 (the  
"1934" Act) and that they are not otherwise required to attribute to each  
other the "beneficial ownership" of securities "beneficially owned" by the  
other corporation within the meaning of Rule 13d-3 promulgated under the 1934  
Act.  Therefore, they are of the view that the shares held by the other  
corporation need not be aggregated for purposes of Section 13(d). However, FMR  
Corp. is making this filing on a voluntary basis as if all of the shares are  
beneficially owned by FMR Corp. and FIL on a joint basis.  

FIL may continue to have the International Funds or other accounts  
purchase shares subject to a number of factors, including, among others, the  
availability of shares for sale at what FIL considers to be reasonable prices  
and other investment opportunities that may be available to the International  
Funds.  

FIL intends to review continuously the equity position of the  
International Funds and other accounts in the Company.  Depending upon its  
future evaluations of the business and prospects of the Company and upon other  
developments, including, but not limited to, general economic and business  
conditions and money market and stock market conditions, FIL may determine to  
cease making additional purchases of shares or to increase or decrease the  
equity interest in the Company by acquiring additional shares, or by disposing  
of all or a portion of the shares.  

FIL does not have a present plan or proposal which relates to or would  
result in (i) an extraordinary corporate transaction, such as a merger,  
reorganization, liquidation, or sale or transfer of a material amount of  
assets involving the Company or any of its subsidiaries, (ii) any change in  
the Company's present Board of Directors or management, (iii) any material  
changes in the Company's present capitalization or dividend policy or any  
other material change in the Company's business or corporate structure, (iv)  
any change in the Company's charter or by-laws, or (v) the Company's common  
stock becoming eligible for termination of its registration pursuant to  
Section 12(g)(4) of the 1934 Act.  

SCHEDULE 13G - TO BE INCLUDED IN STATEMENTS  
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)  
RULE 13d-1(f)(1)  AGREEMENT  

The undersigned persons, on February 14, 1997, agree and consent to the  
joint filing on their behalf of this Schedule 13G in connection with their  
beneficial ownership of the common stock of Duriron Company Incorporated at  
December 31, 1996.  
FMR Corp.  
By      /s/Arthur S. Loring  
Arthur S. Loring 
Vice President - Legal  
Edward C. Johnson 3d  
By      /s/Arthur S. Loring  
Arthur S. Loring 
Under Power of Attorney dated  
5/17/89 
On File with Schedule 13G for 
Airborne Freight Corp. 9/10/91   

Abigail P. Johnson  

By      /s/Arthur S. Loring  
Arthur S. Loring 
Under Power of Attorney dated  
1/5/96 
On File with Schedule 13G for 
Acclaim Entertainment Inc.  
1/10/96  
Fidelity Management & Research Company  
By      /s/Arthur S. Loring  
Arthur S. Loring 
Sr. V.P. and General Counsel  
Fidelity Magellan Fund  
By      /s/Arthur S. Loring  
Arthur S. Loring 
Secretary