6.loosen the two motor lock levers, one on each side of the head, then pull the belt ten- sion adjustment lever forward to release the V-belt tension.

7.refer to the illustrations in Figure 30, and position the V-belt on the pulleys for the desired spindle speed.

Low Spindle Speed Range

Spindle Switch @

Motor

FLOW/RLOW

 

 

80

 

 

135

 

 

210

 

 

325

 

Spindle

Spindle

 

Switch @

 

 

Motor

 

FHI/RHI

 

 

 

160

 

 

270

 

 

420

 

 

650

 

Spindle

 

 

High Spindle Speed Range

Spindle Switch @

Motor

FLOW/RLOW

 

 

660

 

 

1115

 

 

1750

 

 

2720

 

Spindle

Spindle

 

 

Switch @

Motor

 

FHI/RHI

 

 

 

1320

 

 

2230

 

 

3500

 

 

5440

 

Spindle

 

 

Figure 30. Model G0747 V-belt positions. -34-

Note: As displayed in Figure 30, the Model G0747 has two spindle speeds for each V-belt position depending on the spindle switch setting.

8.to re-tension the V-belt, push the adjustment lever backward with moderate force, then re-tighten the two lock levers to secure the motor.

9.replace the two belt housing side covers before re-connecting the mill to power.

To avoid entanglement hazards, always ensure belt housing safety covers are firmly in place before connecting the mill to power.

10.Use the chart below to find the spindle speed range that includes the required spindle speed for your operation and set the spindle switch (Figure 31) accordingly.

Model G0747 Spindle Speed Ranges

Low Range

80–325 RPM

w/Switch @ FLOW/RLoW

 

Low Range

160–650 RPM

w/Switch @ FHI/RHi

 

 

 

High Range

660–2720 RPM

w/Switch @ FLOW/RLoW

 

High Range

1320–5440 RPM

w/Switch @ FHI/RHi

 

 

 

 

 

Figure 31. Model G0747 spindle switch.

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

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Grizzly G0747 and G0748 owner manual Low Spindle Speed Range

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.