Grizzly G0484 Benutzerhandbuch
G0484 Gear Head Mill/Drill
-19-
To determine and set the mill to the needed
cutting RPM:
1. Select the cutting speed required for the
material of your workpiece using the table in
Figure 15.
NOTICE
Failure to follow RPM and Feed Rate
Guidelines will shorten cutter life and give
poor workpiece results and may threaten
operator safety from ejected parts or broken
tools.
Choosing Spindle
RPM
Never shift gears while mill/drill or mill is
running; otherwise, the gear teeth will be
chipped or broken.
NOTICE
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
2. Measure the diameter of your cutting tool in
inches.
3. Use the following formula to determine the
needed RPM for your operation:
Note: You will only be able to get an approxi-
mate RPM value with the gearbox range and
reduction levers.
mate RPM value with the gearbox range and
reduction levers.
4. Move the mill gearbox levers to the nearest
milling speed RPM.
Figure 15. High speed steel cutting chart.
Note: Double the cutting speed for carbide
cutting tools. These values are a guideline
only. Refer to the MACHINERY'S HANDBOOK
for more detailed information.
cutting tools. These values are a guideline
only. Refer to the MACHINERY'S HANDBOOK
for more detailed information.