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cutting speeds for high speed steel (hss)
cutting tools
Workpiece Material
Aluminum & alloys
Brass & Bronze
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 29. Cutting speed table for hss cutting
tools.
failure to follow rpm and feed rate guide-
lines may threaten operator and bystander
safety from ejected parts or broken tools.
NoTICE
failure to follow rpm and feed rate guide-
lines will put undue strain on moving parts,
shorten tool life, and create poor workpiece
results.
g3358 Milling/drilling Machine
Cutting speed (sfm)
300
150
100
80
50
90
80
40
50
60
50
300-800
300-500
graduated dials
the graduated dials on the handwheels for the
table and fine feed can be indexed or "zeroed" to
help make accurate and convenient movements.
each dial can be reset or locked with the set
screw or thumbscrew provided.
example:
suppose you want to drill a series of holes in a
workpiece at 0.625" centers. After locating the
first hole's placement and drilling, you can set
the dial of the appropriate axis to zero while
holding the handwheel. Move the table 0.625".
drill the next hole and proceed as above
(figure 30).
thumb
screw
figure 30. setting dial indicators to zero.
graduated dial
handwheel
-25-
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