TOOL STEEL FOR THE UNITED STATES NAVY. 361 



• The flat drills, i inch in size, cutting on |-inch nickel steel at the rate 

 of 74 revolutions per minute, shall drill at least one hole within a time limit 

 of three minutes. 



Determination of carbon in all cases by the combustion method. 



All of the above steel shall be made by the crucible process and in each 

 grade shall be of uniform quality throughout, to be straight and true to 

 form and size. 



No cutting compounds, water or lubricants are to be used in testing 

 the tools as above, and aU tools must be in good condition at the end of the 

 test, and in order to insure acceptance of the lot. Tools of similar type 

 made up from materials submitted by the successful bidder shall be identical 

 in all dimensions. 



Deliveries of 30 per cent of each size in each grade of carbon tool steel 

 shall be made within 30 days, and such additional quantities of each size 

 in each grade as may be ordered by the General Storekeeper within 90 days 

 after date of order. 



