G0492 12" X 36" Combo Lathe/Mill
-27-
You can manually move the cutting tool around
the lathe/mill with the three handwheels shown
in
Figure 30
.
S
Longitudinal Handwheel
The longitudinal handwheel moves the carriage
left or right along the bed. This control is help-
ful when setting up the machine for turning or
when manual movement is desired during turning
operations.
Cross Slide Handwheel
The cross slide handwheel moves the top slide
toward and away from the work. Turning the dial
clockwise moves the slide toward the workpiece.
Compound Rest Handwheel
The compound rest handwheel controls the
position of the cutting tool relative to the
workpiece. The graduated dial is adjustable
using the same method as the dial on the
cross slide. Angle adjustment is held by two
hex nuts on the base of the compound rest.
Figure 30.
Carriage controls.
Cross Slide
Handwheel
Longitudinal
Handwheel
Compound
Rest
Handwheel
To determine and set the needed spindle
RPM for cutting:
1.
Use the table in
Figure 31
to determine the
cutting speed required for the workpiece
material.
Cutting Speeds for High Speed Steel
(HSS) Cutting Tools
Workpiece Material
Cutting Speed
(sfm)
Aluminum & alloys
300
Brass & Bronze
150
Copper
100
Cast Iron, soft
80
Cast Iron, hard
50
Mild Steel
90
Cast Steel
80
Alloy Steel, hard
40
Tool Steel
50
Stainless Steel
60
Titanium
50
Plastics
300-800
Wood
300-500
Figure 31.
Cutting speed table for HSS cutting
tools.
Failure to follow RPM and feed rate guide-
lines may threaten operator safety from
ejected parts or broken tools.
Using the Manual
Feed Handwheels
Setting the Spindle
RPM
Note:
For carbide cutting tools, double the
cutting speed. These values are a guide-
line only.
Refer to the
MACHINERY'S
HANDBOOK
for more detailed informa-
tion.
Содержание G0492
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