Loading/Unloading

Tooling

The mill is equipped with an R8 spindle taper and a 7⁄16"-20 x 23⁜渠1⁄2" spindle drawbar (see Figure 41).

Figure 41. Upper portion of drawbar.

Tools Needed

Qty

Wrench 21mm

1

Brass Hammer

1

Loading Tooling

1.DISCONNECT MILL FROM POWER!

2.Clean any debris or surface substances from inside the spindle taper and the mating sur- face of the tooling.

Note: Debris or oily substances can prevent the tooling and spindle from properly mating. This condition can cause excessive vibration, poor cutting results, or tool/workpiece dam- age.

3.place the mill in the low spindle speed range to keep the spindle from turning in the next steps.

4.Align the keyway of the tool with the protrud- ing pin inside the spindle taper, then firmly push the tool into the spindle to seat it.

-40-

5.With one hand holding the tool in place, insert the drawbar into the spindle from the top of the head, then thread it into the tool (see Figure 42).

Head of

Drawbar

Figure 42. Drawbar loaded

(Model G0747 shown).

6.tighten the drawbar until it is snug. Avoid overtightening, as this could make removing the tool difficult.

Unloading Tooling

1.DISCONNECT MILL FROM POWER!

2.place the mill in the low spindle speed range to keep the spindle from turning in the next step.

Note: Make sure that the drawbar has at least three threads engaged with the tool- ing in the next step to avoid damaging the threads of the drawbar or tool.

3.loosen the drawbar a couple of turns, then tap the top of it with a brass hammer to knock the tool loose at the bottom of the spindle.

4.support the tool with one hand, then com- pletely unthread the drawbar from the tool.

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

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Image 42
Grizzly G0747 and G0748 owner manual Loading/Unloading Tooling, Loading Tooling, Tools Needed Qty
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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.
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