Grizzly G0492 owner manual Setup for Threading, To setup for threading

Setup for Threading

Your lathe is capable of cutting inch and metric threads.

To setup for threading:

1.DISCONNECT THE LATHE/MILL FROM POWER!

2.Refer to the Change Gear Chart on Page 31 or the chart on the inside of the change gear door to determine the needed combination of gears and which spindle location to install each gear on.

See Figure 36 for examples of how gear com- binations 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.

Inch	Longitudinal Cross
Threading	Feed	Feed

Figure 36. Using the change gear chart.

3.Loosen the lash adjuster (Figure 33) and swing the assembly out of the way.

4.Remove the required E-clips, lubricate, and swap out the appropriate change gears.

5.Move the lash adjuster so the gear backlash is at 0.003" to 0.008", and tighten the lock nut.

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6.Use the leadscrew lever to select leadscrew direction (Figure 37).

7.Setup the cutting tool, compound rest, and cross slide to cut your threads; and loosen the apron lock (Figure 35).

	Thread Dial
Leadscrew Lever

Figure 37. Threading controls.

—If cutting inch threads, refer to the Thread Dial Table in Figure 38 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 opera- tion is totally complete.

THREAD DIAL TABLE

LEAD SCREW PITCH 5 T.P.I.

T.P.I.	DIAL	T.P.I.	DIAL
5	1-6	18	1 or 2

61 or 2 20

7	1	22	1 or 2
8	1	23	1
9	1	24	1 or 2
10	1-6	25	1-6
11	1	26	1 or 2
11.5		28	1 or 2
12	1 or 2	30	1-6

12.532 1 or 2

13	1	34	1 or 2
14	1 or 2	36	1 or 2
15	1-6	40	1-6
16	1 or 2	48	1 or 2
17	1

Figure 38. Thread dial table.

8.Loosen the apron lock bolt and use the feed lever (Figure 35).

9.While threading, keep your hand on the half-nut lever, ready to disengage the apron to avoid any potential for an apron/chuck crash.

G0492 12" X 36" Combo Lathe/Mill