Changing Spindle Speed - Grizzly G0925 Owner's Manual

Changing
Spindle Speed
The Model G0925 has five spindle speeds that
operate between 740-3140 RPM. Refer to the
speed chart located under the belt cover.
The highest speed is obtained when the belt is
positioned on the smallest spindle pulley sheave
(E) and the largest motor pulley sheave (5), as
shown in Figure 17.
E
D
C
B
A
Spindle Pulley
A-1: 740 RPM
B-2: 1100 RPM
C-3: 1530 RPM
D-4: 2100 RPM
E-5: 3140 RPM
Figure 17. Spindle speed chart.
To change spindle speed:
1.
DISCONNECT MACHINE FROM POWER!
2.
Open belt cover.
3.
Determine correct spindle speed for operation
(see Choosing Spindle Speeds on Page 19).
4. Turn belt tension knob counterclockwise to
loosen motor tension spring (see Figure 18).
Figure 18. Belt tension knob location.
-20-
Motor Pulley
5
4
Belt
3
2
1
Belt Tension
Knob
5. Pull motor toward front of drill press. This will
take tension off V-belt.
Note: If V-belt is tight, have an assistant pull
motor while you change drill speeds.
Use care when changing V-belts as they
could pinch your fingers. They may also
get hot after extended use so wait to
change speeds if drill has been in use.
— If drive belt is cracked, torn, excessively
worn, or damaged, replace it.
6. Move V-belt onto desired sheave on motor
and spindle pulleys (see Figure 19).
Spindle Pulley
Figure 19. V-belt components.
7.
Push motor away from drill press to increase
belt tension and tighten belt tension knob to
secure.
Note: Belt should be tight enough to prevent
slippage. Correct tension is set if belt flexes
⁄ " when thumb pressure is applied at mid-
1
4
point of belt between pulleys (see Figure 20).
Pulley
¼"
Pulley
Figure 20. Checking belt tension.
Model G0925 (Mfd. Since 02/20)
Motor Pulley
V-Belt
Deflection