Calculating Spindle Speed - Grizzly G0704 Owner's Manual

calculating Spindle
Speed
Closely follow the proper spindle
proper feed rate to produce good results, reduce
undue strain on all moving parts and increase
operator safety.
prior to milling, determine the spindle speed
needed to cut your workpiece, then set the speed
on the machine.
To determine the needed spindle speed:
1. use the table in figure 24 to determine the
cutting speed required for the material of your
workpiece.
2. measure the diameter of your cutting tool in
inches.
3. use the following formula to determine the
needed spindle rpm for your operation:
(cutting Speed x 4) /Tool Diameter = RpM
-26-
cutting Speeds for High Speed Steel (HSS)
Workpiece material
aluminum & alloys
brass & bronze
speed and
Copper
Cast iron, soft
Cast iron, hard
mild steel
Cast steel
alloy steel, hard
tool steel
stainless steel
titanium
plastics
Wood
Note: For carbide cutting tools, double the cut-
ting speed. these values are a guideline only.
refer to the MACHINERY'S HANDBOOK for
more detailed information.
figure 24. Cutting speed table for hss cutting
cutting Tools
Cutting speed (sfm)
300
150
100
80
50
90
80
40
50
60
50
300-800
300-500
tools.
Model G0704 (Mfg. Since 08/11)