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Model G0740 (Mfg. Since 11/12)
Setting Spindle Speed of 1600 RPM
1. Make sure the spindle is completely stopped
and the spindle lever is in the OFF (middle)
position.
2. Turn the motor switch to the high (right) posi-
tion.
Note: The blue color of the motor switch high
position corresponds to the column in the left-
hand speed chart with the blue header that
contains the speed of 1600 RPM.
3. Move the spindle range lever to the left so
that the arrow on top of its hub points toward
the left-hand speed chart (see the illustration
in Figure 71).
Figure 71. Spindle speed set at 1600 RPM.
Spindle Range Lever Pointing
To The Left-Hand
Speed Chart
Spindle Speed
Lever Set To
“C” (1600 RPM)
A
B
C
D
4. Position the spindle speed lever so that the
"C" is directly under the arrow on the head-
stock.
The lathe is now set for a spindle speed of 1600
RPM.
Both the carriage and cross slide have power feed
capability when the carriage is engaged with the
feed rod. The rate that these components move
(feed rate) is controlled by the headstock and
quick-change gearbox lever positions, and the
end gear configuration.
Feed rate and spindle speed must be consid-
ered together. Keep in mind that the feed rate is
expressed in the amount of travel per revolution
of the spindle. The sources you use to determine
the optimum spindle speed for an operation will
also provide the optimal feed rate to use with that
spindle speed.
Often, the experienced machinist will use the
feeds and speeds given in their reference charts
or web calculators as a starting point, then make
minor adjustments to the feed rate (and some-
times spindle speed) to achieve the best results.
The carriage can alternately be driven by the
leadscrew for threading operations. However, this
section only covers the use of the power feed
option for the carriage and cross slide compo-
nents for non-threading operations. To learn how
to power the carriage for threading operations,
refer to Threading on Page 57.
Operating the lathe at spindle speeds higher
than 315 RPM when the high (H) gearbox
range is selected could result in gearbox
damage. Always use spindle speeds of
315 RPM or lower when using the high (H)
gearbox range.
Power Feed