Grizzly G0747 and G0748 owner manual Coarse Downfeed, Fine Downfeed, To use the coarse downfeed

Models: G0747 and G0748

1 80
Download 80 pages 42.76 Kb
Page 39
Image 39

Coarse Downfeed

Use the coarse downfeed lever to quickly move the spindle manually.

To use the coarse downfeed:

1.Make sure the spindle is completely stopped.

2.pull the downfeed selector knob out, then rotate it clockwise until the knob pin seats in the forward manual (disengaged) detent (see Figure 35).

Note: It may be necessary to turn the spindle by hand as you move the selector to enable the gears to mesh.

Manual (Disengaged) Position

Figure 35. Downfeed selector in manual

(disengaged) position.

3.Make sure the pin of the coarse downfeed lever hub is engaged with one of the detents on the downfeed sleeve (see Figure 36).

Coarse Downfeed

Lever Hub & Sleeve

Quill Lock

Lever

Figure 36. Coarse downfeed lever hub,

downfeed sleeve, and quill lock.

Model G0747/G0748 (Mfg. Since 8/12)

4.Make sure the quill lock lever is loose so that the quill can easily move.

5.rotate the coarse downfeed lever around the hub to control the depth of the spindle.

Fine Downfeed

1.Make sure the spindle is completely stopped.

2.pull the downfeed selector knob out, then rotate it clockwise until the knob pin seats in the forward manual (disengaged) detent (see Figure 35).

Note: It may be necessary to turn the spindle by hand as you move the selector to enable the gears to mesh.

3.set the auto-downfeed direction pin in the neutral (middle) position to disengage the fine downfeed handwheel from the auto- downfeed gears.

4.position the downfeed stop for the spindle depth that is correct for your operation, then secure it in place with the locking wheel.

5.use the coarse downfeed lever to lower the spindle slightly until you can pull the fine downfeed clutch lever out to the left and it locks in place. This will engage the fine downfeed handwheel with the quill and spindle.

6.to lower the spindle, rotate the fine downfeed handwheel. When the quill dog meets the downfeed stop, the clutch lever will disen- gage and the spindle will return to the top.

-37-

Page 39
Image 39
Grizzly G0747 and G0748 owner manual Coarse Downfeed, Fine Downfeed, To use the coarse downfeed

G0747 and G0748 specifications

The Grizzly G0747 and G0748 are advanced metal lathes designed for precision machining and versatility, catering to both amateur machinists and professional workshops. These machines stand out in the realm of metalworking equipment, thanks to their robust construction and innovative features.

One of the key attributes of the G0747 and G0748 is their solid cast iron construction, which provides excellent vibration dampening during operation. This enhances stability and precision, crucial for producing high-quality machined parts. Equipped with powerful motors, both models are capable of handling a wide range of materials, from aluminum to harder metals like steel.

The G0747 features a variable speed drive system, allowing users to adjust the spindle speed based on the project at hand. This flexibility is beneficial for tasks that require different cutting speeds, enabling machinists to optimize cutting performance and tool longevity. Its variable speed output ranges, alongside smooth torque delivery, make it ideal for intricate turning operations.

On the other hand, the G0748 includes an advanced digital readout (DRO) system. This feature provides real-time feedback on the machine's position and speed, significantly improving accuracy in measurements during machining tasks. The DRO system allows operators to set precise limits and keep track of their progress, essential for complex projects where exact dimensions are critical.

Both lathes are equipped with a user-friendly interface, making them accessible for beginners while still offering advanced functionalities that seasoned professionals appreciate. They include multiple tooling options, allowing for an expansive range of machining techniques including turning, threading, and drilling.

Moreover, the G0747 and G0748 come with a comprehensive assortment of accessories, such as different types of chucks and tool holders, which further extends their capabilities. The ease of changing tooling and quick setup times are significant advantages for shops aiming for efficiency and versatility in their operations.

In conclusion, the Grizzly G0747 and G0748 metal lathes are exemplary units that balance power, precision, and user-friendliness. Their advanced features, such as variable speed capabilities and digital readouts, equip machinists with the tools necessary to produce exceptional work. Whether for hobbyists or industrial applications, these lathes are built to meet a variety of machining needs with impressive performance and reliability.