50 — M
achinist
c
alc™
/ M
achinist
c
alc™
P
ro
Metric Thread Size –
Model 4087
Find the available Internal and External Thread characteristics
for a 5 mm, 0.75 mm Pitch screw with a Tolerance Class of 4H.
Note:
The default Metric Tolerance Class is 6H (Internal). To view the
current Tolerance Class, press
g b
after entering the desired Metric
Thread Size. To change the class, press
b
again.
KeYSTROKe
DISPLAY
g *
ALL CLeAred
1. Set Tolerance Class to Internal 4H:
4 g b
(Thread Class)
INT
MM
4H
2. Enter the Thread Size:
5 m t
SIZe
5. –
MM
3. Enter the Thread Pitch and store the final Thread Size:
0 . 7 5 t
THReD
SIZe
5. – 0.75
MM
4. Find the available Internal Thread characteristics:
t
(Cut Tap Drill Size)
TAP
DRILL SIZe
4.25
MM
t
(Roll Tap Drill Size)
R-TAP
DRILL SIZe
14
t
(Close Fit Drill Size)
CLOSe
DRILL SIZe
5.3
MM
t
(Free Fit Drill Size)
fRee
DRILL SIZe
5.8
MM
t
(Min. Internal Pitch Diameter)
PTCH-
SIZe
4.5130
MM
t
(Max. Internal Pitch Diameter)
PTCH+
SIZe
4.5605
MM
t
(Min. Internal Minor Diameter)
MINR-
SIZe
4.1880
MM
t
(Max. Internal Minor Diameter)
MINR+
SIZe
4.3060
MM
t
(Min.Internal Major Diameter)
MAJR-
SIZe
5.0000
MM
5. Switch to External 4g Tolerance Class and find the available
External Thread characteristics:
g b b
(Thread Class)
eXT
MM
4G
t
THReD
SIZe
5. – 0.75
MM
t
(Rod Size for Thread Cutting)
ROD
SIZe
5.0000
MM