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, g0748 owner manual Low Spindle Speed Range