20
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THREAD SCALE INDICATOR TABLE
SAE TPI
SCALE
mm PITCH
SCALE
12
1, 3, 5, 7
0.4
1, 3, 5, 7
13
1
0.5
1 to 8
14
1, 5
0.6
1 to 8
16
1 to 8
0.7
1, 4.5
18
1, 5
0.8
1, 5
19
1
1.0
1 to 8
20
1, 3, 5, 7
1.25
1, 3.5
22
1, 5
1.5
1 to 8
24
1 to 8
1.75
1, 4.5
26
1, 5
2.0
1 to 8
28
1, 3, 5, 7
32
1 to 8
36
1, 3, 5, 7
38
1, 5
40
1 to 8
44
1, 3, 5, 7
48
1 to 8
52
1, 3, 5, 7
USING THE THREAD DIAL INDICATOR
Mounted on the Base, adjacent to the Auto Feed Lever, is the Thread Dial Indictor
(FIG 22)
. This is directly connected to the as the Leadscrew turns, the Dial rotates.
Eight radial markings are etched into the Dial face and are used to determine the exact
position of the Leadscrew thread in relation to the Saddle.
The numbers on the “SCALE” column of the THREAD SCALE INDICATOR TABLE
refer to the numbers on the radial lines of the Dial.
For example: If a 20TPI thread is to be cut, the numbered marks 1,3,5 or 7
may be used.
FIG. 22
