Using the Manual Feed Handwheels
You can manually move the cutting tool around the lathe/mill with the three handwheels shown in Figure 30.
Compound |
Rest |
Handwheel |
Cross Slide |
Handwheel |
Longitudinal |
Handwheel |
Figure 30. Carriage controls.
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.
G0492 12" X 36" Combo Lathe/Mill
Setting the Spindle
RPM
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 | |
|
|
Wood | |
|
|
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.
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.
