54 — Ma c h i n i s t ca l c ™/ Ma c h i n i s t ca l c ™ Pr o
Find the Pitch Diameter of a 3/8-16, Class 2A (External) screw
with a 3-Wire Measurement of 0.3975 Inches obtained using a
0.040 Inch wire:
KEYSTROKE DISPL AY
OO
0.
1. Enter the Thread Size:
3/8
t
SIZE 3/8
–
INCH
2. Enter the Threads per Inch and store the nal Thread Size:
16t
THRED
SIZE
3/8
–
16
INCH
3. Enter the Wire Size*:
.04gf
(Wire Size)
WIRE
SIZE
0.04 INCH
4. Enter the 3-Wire Measurement:
.3975gR
(3-W Measure)
3WIRE
SIZE
0.3975 INCH
5. Find the Pitch Diameter:
R P-DIA
SIZE 0.3316 INCH
R WIRE
SIZE
0.04 INCH
* If no Wire Size is entered, the calculated Best (Ideal) Wire Size will
be used to nd the Pitch Diameter.
BOlT PaTTErN
With the Machinist Calc and Machinist Calc Pro, you can
determine a Bolt Pattern by entering the Bolt Circle Diameter,
the Number of Bolt Holes and the Angle of the rst bolt hole
(optional). The Machinist Calc Pro offers the added ability to enter
an optional Center x and y-coordinate of the Bolt Pattern.
In addition to calculating the x and y-coordinates for each bolt
hole, the Bolt Pattern function also calculates the hole center-to-
center spacing (i.e. on-center distance from hole to hole).
(cont'd)
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