Us e r 's GU i d e — 45
3. Find the recommended Cutting Tap Hole Size (Cut Tap Drill
Size) and the Thread Outside Diameter (Minimum Major
Diameter).
t
Cut Tap Drill Size)
TAP DRILL SIZE 7.25 MM
t
(Outside Diameter) OD SIZE 8.0000 MM
* After entering the Pitch value, the press of
t
is required in order to
store the entered Thread Size.
Thread Classication (NOT AVAILABLE ON MODEL 4086)
The Machinist Calc Pro provides additional outputs and gives
you the choice 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
Entering a Metric Thread will allow you to choose among Metric
Thread Tolerance Classes as shown below.
Thread Type Metric Thread Tolerance Classes
Internal
3G
3H
4G
4H
5G
5H
6G
6H*
7G
7H
8G
8H
9G
9H
External
3g
3h
3e
3f
4g
4h
4e
4f
5g
5h
5e
5f
6g
6h
6e
6f
7g
7h
7e
7f
8g
8h
8e
8f
9g
9h
9e
9f
* Default settings
Changing Thread Classes
To display the current Thread Classication, press
gb
.
Repeated presses of
b
will toggle between External and
Internal Thread Types. You can change the number of a
Thread Class by entering the number of the desired class/
grade and pressing
gb
.
KEYSTROKE DISPLAY
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