Spindle Speed - Grizzly G0801 Owner's Manual

Rotating Turret
1.
DISCONNECT MACHINE FROM POWER!
2.
Use a 17mm wrench to loosen the three
turret locking nuts on base of turret (see
Figure 28).
Turret Locking Nuts
(1 of 3)
Figure 28. Turret rotational controls.
3. Push mill head to manually rotate turret. Use
rotation scale to determine correct position
for your operation, then retighten nuts to
secure turret in place.
-30-
Using the correct spindle speed is important for
safe and satisfactory results, as well as maximiz-
ing tool life.
To set the spindle speed for your operation, you
will need to: 1) Determine the best spindle speed
for the cutting task, and 2) configure the spindle
controls to match the closest spindle speed.
Determining Spindle Speed
Turret Many variables affect the optimum spindle speed
Rotation to use for any given operation, but the two most
Scale important are the recommended cutting speed for
the workpiece material and the diameter of the
cutting tool, as noted below.
Figure 29. Spindle speed formula for milling.
Cutting speed, typically defined in feet per minute
(FPM), is the speed at which the edge of a tool
moves across the material surface.
The "Recommended Cutting Speed" varies
depending on the type of workpiece material. It is
the ideal speed for cutting that material in order to
optimize tool life and produce a desirable finish.
The books Machinery's Handbook or Machine
Shop Practice, and some internet sites, pro-
vide excellent recommendations for which cutting
speeds to use when calculating the spindle speed.
These sources also provide a wealth of additional
information about the variables that affect cutting
speed and they are a good educational resource.
Also, there are a large number of easy-to-use
spindle speed calculators that can be found on
the internet. These sources will help you take into
account all applicable variables to determine the
best spindle speed for the operation.

Spindle Speed

*
Recommended
Cutting Speed (FPM) x 12
Tool Dia. (in inches) x 3.14
*
Double if using carbide cutting tool
Model G0801/G0802 (Mfd. Since 09/15)
Spindle
=
Speed
(RPM)