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u.S. THREAD SIzING
In U.S. mode, the Thread Sizing function provides the same
Thread characteristics as the metric mode, but includes Numeric
and Fractional Thread Sizes and Threads Per Inch (TPI).
When using the
t
key, the first entry is considered the Thread
Size. Upon entering the Thread Size, the Threads per Inch
(TPI) is required. If the entered Thread Size is a standard
size, continuous presses of the
t
key will toggle through
the available common TPI. Once the desired TPI is reached,
pressing
O
stores the Thread Size. If the Thread Size you
enter is not a standard size or if you have a non-common TPI,
you will need to directly enter the TPI value, pressing
t
after
entering it in order to store the Thread Size.
The following specifies the entry ranges that the calculator
allows for the Thread Size and TPI values for numeric and
fractional Thread Sizes:
Thread size
TPI
Numeric
0,1,2,3,4,5,6,8,10,12,14
less than 100
Fractional
0.06" to 6"
less than 100
Note:
Entries outside of the ranges mentioned above will result in
an Entry Error.
U.s. Thread Classes
With the
Machinist Calc Pro
you can choose between Internal
and External Threads. Entering a U.S. Thread Size will allow you
to choose among U.S. Thread Classes as shown below.
Thread Type
U.s. Thread Classes
Internal
1b
2b*
3b
external
1a
2a
3a
* Default setting
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6/9/2011 3:16:19 PM
