Auto-Downfeed

When using the auto-downfeed system, the spin- dle will move in the direction you choose with the auto-downfeed direction pin. When the quill dog reaches the top or meets the downfeed stop, the downfeed clutch lever will release. Then, if the spindle was traveling upward, the movement will simply stop. If the spindle was traveling down- ward, then the spindle will move back to the top at a rate controlled by the return spring on the left side of the head.

To use the auto-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 auto-downfeed (engaged) detent (see Figure 37).

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

Auto-Downfeed (Engaged) Position

Figure 37. Downfeed selector in auto-downfeed

(engaged) position.

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

-38-

4.position the auto-downfeed direction pin in the center of the handwheel for the spindle travel that is correct for your operation. If nec- essary, rock the fine downfeed handwheel back-and-forth to move the pin all the way in or out.

Note: The direction pin has three positions:

1)In for one downfeed direction, 2) middle for neutral or no movement, and 3) out for the reverse direction. The direction of spindle travel for the in and out positions is relative to the direction of spindle rotation. Keep in mind that spindle rotation and downfeed direction will reverse when the spindle speed range is changed.

5.Make sure the clutch lever is all the way to the right in the disengaged position so that the spindle will not travel when rotation is started.

Note: We recommend that you complete the remaining steps without a cutting tool installed, without a workpiece in place, and the table lower than the maximum spindle downfeed travel. This will enable you to test and confirm the settings before beginning the actual cutting operation.

To avoid damage to the system gearing, never use the auto-downfeed system with spindle speeds over 1750 RPM.

6.set the mill for the correct spindle speed, then begin spindle rotation.

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

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Grizzly G0747 and G0748 owner manual Auto-Downfeed, To use the auto-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.