METRIC
THREADING ON LOGAN LATHES
Must include 100 T. and 127 T. Transposing Gears (Accurate)
or
may use 37 T. and 47 T. Transposing Gears (2/100 of 1% Inaccuracy)
|
|
For 9",
10", 11" and 2900 Series 12" Logan Lathes |
For
2500 Series 12" and 14" Logan Lathes |
100 T |
||
127 T |
||
37 T |
N/A |
|
47 T |
N/A |
Lathes with Quick Change Gear Box:
MM Pitch=(40/Gearbox Setting) X (Stud Gear/Gear Box
Gear)
Plain Change Lathes
(without Gear Box):
MM Pitch=2.5 X (Stud Gear/Lead Screw Gear)
Typical Diagrams
Below
|
|
48T Gear Box Gear |
60T Gear Box Gear |
72T Gear Box Gear |
Plain Change Lathes |
|||
|
MM Pitch |
Stud Gear |
Gear
Box Setting |
Stud
Gear |
Gear
Box Setting |
Stud
Gear |
Gear
Box Setting |
Ratio=Stud
Gear/Screw Gear |
|
0.20 |
|
|
48 |
160 |
|
|
.08 |
* |
0.25 |
24 |
80 |
48 |
128 |
36 |
80 |
.10 |
|
0.30 |
|
|
72 |
160 |
|
|
.12 |
* |
0.35 |
|
|
42 |
80 |
|
|
.14 |
* |
0.40 |
|
|
48 |
80 |
|
|
.16 |
* |
0.45 |
|
|
54 |
80 |
|
|
.18 |
* |
0.50 |
24 |
40 |
48 |
64 |
36 |
40 |
.20 |
|
0.60 |
|
|
72 |
80 |
|
|
.24 |
|
0.65 |
|
|
39 |
40 |
|
|
.26 |
* |
0.70 |
|
|
42 |
40 |
|
|
.28 |
* |
0.75 |
36 |
40 |
54 |
48 |
54 |
40 |
.30 |
* |
0.80 |
|
|
48 |
40 |
|
|
.32 |
|
0.90 |
|
|
54 |
40 |
|
|
.36 |
* |
1.00 |
24 |
20 |
48 |
32 |
36 |
20 |
.40 |
|
1.20 |
|
|
72 |
40 |
|
|
.48 |
* |
1.25 |
24 |
16 |
60 |
32 |
36 |
16 |
.50 |
|
1.30 |
|
|
39 |
20 |
|
|
.52 |
|
1.40 |
|
|
42 |
20 |
|
|
.56 |
* |
1.50 |
36 |
20 |
54 |
24 |
54 |
20 |
.60 |
* |
1.75 |
42 |
20 |
42 |
16 |
|
|
.70 |
* |
2.00 |
24 |
10 |
48 |
16 |
36 |
10 |
.80 |
|
2.25 |
54 |
20 |
54 |
16 |
|
|
.90 |
* |
2.50 |
24 |
8 |
60 |
16 |
36 |
8 |
1.0 |
|
2.75 |
66 |
20 |
66 |
16 |
|
|
1.1 |
* |
3.00 |
36 |
10 |
54 |
12 |
54 |
10 |
1.2 |
* |
3.50 |
42 |
10 |
42 |
8 |
|
|
1.4 |
* |
4.00 |
48 |
10 |
48 |
8 |
72 |
10 |
1.6 |
* |
4.50 |
54 |
10 |
54 |
8 |
|
|
1.8 |
* |
5.00 |
48 |
8 |
60 |
8 |
72 |
8 |
2.0 |
* |
5.50 |
66 |
10 |
66 |
8 |
|
|
2.2 |
* |
6.00 |
72 |
10 |
72 |
8 |
|
|
2.4 |
Note: * indicates ISO
Standard Metric Pitches.