Calculated Industries MACHINIST CALC PRO User Manual

U ser 's GUide — 49u.S. THREAD SIzINGIn U.S. mode, the Thread Sizing function provides the sameThread characteristics as the metric mode, but includes Numericand Fractional Thread Sizes and Threads Per Inch (TPI).When using the t key, the first entry is considered the ThreadSize. Upon entering the Thread Size, the Threads per Inch(TPI) is required. If the entered Thread Size is a standardsize, continuous presses of the t key will toggle throughthe available common TPI. Once the desired TPI is reached,pressing O stores the Thread Size. If the Thread Size youenter is not a standard size or if you have a non-common TPI,you will need to directly enter the TPI value, pressing t afterentering it in order to store the Thread Size.The following specifies the entry ranges that the calculatorallows for the Thread Size and TPI values for numeric andfractional Thread Sizes:Thread size TPINumeric 0,1,2,3,4,5,6,8,10,12,14 less than 100Fractional 0.06" to 6" less than 100Note: Entries outside of the ranges mentioned above will result inan Entry Error.U.s. Thread ClassesWith the Machinist Calc Pro you can choose between Internaland External Threads. Entering a U.S. Thread Size will allow youto choose among U.S. Thread Classes as shown below.Thread Type U.s. Thread ClassesInternal 1b 2b* 3bexternal 1a 2a 3a* Default setting