M1109 Combo Lathe/Mill
OPERATIONS
Threading Setup
Your lathe is capable of cutting inch and metric threads.
To setup for threading, do these steps:
1.DISCONNECT THE LATHE/MILL FROM POWER!
2.Refer to the Change Gear Chart on Page 29 or the chart on the inside of the change gear door to deter- mine the needed combination of gears and which spindle location to install each gear on.
See Figure 42 for examples of how gear combina- tions can achieve your needed threading rate. For example: The chart shows that 24 TPI is needed.
Note: All change gears are stamped with the number of teeth they have.
3.Loosen the lash adjuster (Figure 39) and swing the assembly out of the way.
4.Remove the required
5.Move the lash adjuster so the gear backlash is at 0.003" to 0.008", and tighten the lock nut.
6.Use the leadscrew lever to select leadscrew direction (Figure 43).
7.Setup the cutting tool, compound rest, and cross slide to cut your threads; and loosen the apron lock (Figure 41).
•If cutting inch threads, refer to the Thread Dial Table in Figure 44 to use the thread dial.
•If cutting metric threads, do not use the thread dial. Instead, you must leave the half nut engaged until the threading operation is totally complete.
8.Loosen the apron lock bolt and use the feed lever (Figure 41).
9.While threading, keep your hand on the
Inch | Longitudinal Cross | |
Threading | Feed | Feed |
Figure 42. Using the change gear chart.
Leadscrew Lever | Thread Dial |
Figure 43. Threading controls.
THREAD DIAL TABLE
LEAD SCREW PITCH 5 T.P.I.
T.P.I. | DIAL | T.P.I. | DIAL |
5 | 18 | 1 or 2 | |
6 | 1 or 2 | 20 |
|
7 | 1 | 22 | 1 or 2 |
8 | 1 | 23 | 1 |
9 | 1 | 24 | 1 or 2 |
10 | 25 | ||
11 | 1 | 26 | 1 or 2 |
11.5 |
| 28 | 1 or 2 |
12 | 1 or 2 | 30 |
12.532 1 or 2
13 | 1 | 34 | 1 or 2 |
14 | 1 or 2 | 36 | 1 or 2 |
15 | 40 | ||
16 | 1 or 2 | 48 | 1 or 2 |
17 | 1 |
|
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