Grizzly g0746, g0749 owner manual Headstock Pitch Turning Controls, For example

1⁄2 Fractional TPI: Use any opposing number pairs—1/3 or 2/4 on the thread dial (see example in Figure 95).

Figure 95. Example of opposing number groups

for cutting 1⁄2 thread TPI.

Important: Once a number has been selected, continue using that number or its odd/even counterpart.

For example:

•If you use 1 during the first threading pass, then you must select 1 or 3 for all following passes.

•If you use 2 during the first threading pass, then you must select 2 or 4 for all following passes.

1⁄4 or 3⁄4 Fractional TPI: Use position 1 on the thread dial (see example in Figure 96).

Figure 96. Example of 1⁄4 or 3⁄4 fractional TPI.

Pitch Turning

The following subsection describes how to set up the lathe for diametral or modular pitch turning. If you are unfamiliar with the process of turning pitches on a lathe, we strongly recommend that you read books, review industry trade magazines, or get formal training before attempting specific projects.

Headstock Pitch Turning Controls

The pitch turning charts on the headstock face display the settings for diametral and modular pitch turning, as shown in Figure 97.

Modular

Pitches

Diametral

Pitches

Figure 97. Location of modular and diametral

pitch charts.

Using the controls on the lathe, follow the exam- ple below to understand how to set up the lathe for the desired pitch turning operation.

To set levers and dials for 1.25 MP:

1.Configure the gears as instructed in Alternate Configuration on Page 55.