Adjusting Spindle Speeds - Grizzly G0844 Owner's Manual

Adjusting Spindle
Speeds
Your lathe has three speed ranges for maximum
turning options. These ranges are selected by
changing belt positions on the motor and spindle
pulleys (see Figure 19).
= High Range
A
800–3300 RPM
B = Mid Range
600–2000 RPM
= Low Range
C
300–1000 RPM
(Viewed from Back of Headstock)
Figure 19. Speed ranges for each belt position.
High range (A) is best when turning a workpiece
where a clean finish is required and only light cuts
are made. Mid range (B) is a compromise between
high and low ranges. Low range (C), which has
more torque, is best when turning a workpiece
where a lot of material must be removed and a
rough finish does not matter. Use the speed dial
to adjust spindle speed within each range.
Refer to the chart below to choose the appropriate
RPM for your operation. Then choose the speed
range that will include the selected RPM.
Diameter Roughing
of Work- RPM
piece
Under 2" 1520
2–4" 760
4–6" 510
6–8" 380
8–10" 300
10–12" 255
12–14" 220
Figure 20. Speed recommendations.
Model G0844 (Mfd. Since 2/18)
Spindle
C
B
A
Motor
General Finishing
Cutting RPM
RPM
3000 3000
1600 2480
1080 1650
810 1240
650 1000
540 830
460 710
Always choose correct spindle speed for
your operation. Using wrong speed may lead
to workpiece breaking loose or being thrown
from lathe at a high rate of speed, causing
fatal or severe impact injuries.
Tool Needed
Phillips Head Screwdriver #2 ............................ 1
To change speeds:
1. DISCONNECT MACHINE FROM POWER!
2. Loosen belt-tension
(see Figure 21).
3. Use belt-tension lever (see Figure 21) to lift
motor assembly all the way up, then re-tight-
en belt-tension lock handle—this will hold
motor in place while you change belt position.
Belt-Tension
Lever
Figure 21. Location of belt-tension lever.
4.
Open front access cover and remove side
access cover (see Figure 22).
Side Access
Cover Removed
Figure 22. Location of side, front access covers.
lock handle
Belt-Tension
Lock Handle
Front
Access
Cover
Opened
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