48 — M
achinist
c
alc™
/ M
achinist
c
alc™
P
ro
3. Enter the TPI and store the final Thread Size:
3 2 t
THReD
SIZe
8 – 32
4. Find the available Internal Thread characteristics:
t
(Cut Tap Drill Size)
TAP
DRILL SIZe
29
t
(Roll Tap Drill Size)
R-TAP
DRILL SIZe
3.75
MM
t
(Close Fit Drill Size)
CLOSe
DRILL SIZe
18
t
(Free Fit Drill Size)
fRee
DRILL SIZe
16
t
(Min. Internal Pitch Diameter)
PTCH-
SIZe
0.1437
INCH
t
(Max. Internal Pitch Diameter)
PTCH+
SIZe
0.1475
INCH
t
(Min. Internal Minor Diameter)
MINR-
SIZe
0.1300
INCH
t
(Max. Internal Minor Diameter)
MINR+
SIZe
0.1390
INCH
t
(Min. Internal Major Diameter)
MAJR-
SIZe
0.1640
INCH
5. Switch to Thread Class 2A and find the available External
Thread characteristics:
g b b
(Thread Class)
eXT 2A
t
THReD
SIZe
8 – 32
t
(Rod Size for thread cutting)
ROD
SIZe
0.1640
INCH
t
(Rod Size for cold forming)
CfORM
SIZe
0.1450
INCH
t
(Max. External Pitch Diameter)
PTCH+
SIZe
0.1428
INCH
t
(Min. External Pitch Diameter)
PTCH-
SIZe
0.1399
INCH
t
(Max. External Major Diameter)
MAJR+
SIZe
0.1631
INCH
t
(Min. External Major Diameter)
MAJR-
SIZe
0.1571
INCH
t
(Max. External Minor Diameter)
MINR+
SIZe
0.1259
INCH
fractional Thread Size –
Model 4087
Find the available Internal and External Thread characteristics
for a 1/4 Inch, 28 TPI screw.
KeYSTROKe
DISPLAY
