Grizzly VS MILLING MACHINE G0669X - Manual (Page 31)

g0669X precision 10" x 54" Vs Milling Machine
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Rotating the Ram
1. disConneCt the MiLL FroM poWer!
2. Loosen the four rotation locking bolts on top
of the column shown in figure 34.
figure 34. ram rotation locking bolts.
Locking
Bolts
Locking
Bolts
3. Manually rotate the ram around the column to
the desired position.
Note: Take care not to entangle or stretch the
electrical cabling as you move the ram and
head.
4. re-tighten the four rotation locking bolts to
hold the ram in place.
Setting Spindle RPM
to select the correct spindle rpM for your milling
operation, you will need to: 1) determine the rpM
needed for your workpiece, 2) select the correct
spindle speed range, and 3) configure the spindle
speed controls for the calculated rpM.
Calculating RPM
1. Use the table in figure 35 to determine the
cutting speed required for your 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
Note: For carbide cutting tools, double the cutting
speed. These values are a guideline only. Refer to
the MACHINERY'S HANDBOOK for more detailed
information.
figure 35. Cutting speed table for hss cutting
tools.