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Setting Spindle
Height
Selecting Spindle
RPM
Figure 15.
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Figure 15
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To change the spindle position:
1.
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[ZZYadX``cdW#
Tip:
Use the fold-out lever (
hZZ
Figure 15
)
for additional leverage to unlock the fine feed
lock knob if the knob is too tight. Do not use
the fold-out lever to tighten the knob.
2.
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Tip:
Milling with the quill fully extended can
cause tool chatter. For maximum spindle
rigidity, it is better to keep the spindle retract-
ed into the headstock as far as possible with
the quill lock lever and fine feed lock knob
tightened.
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To determine the needed RPM:
1.
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Figure 14
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2.
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3.
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Cutting Speeds for High Speed Steel (HSS)
Cutting Tools
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(%%
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-%
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.%
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(%%"-%%
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Figure 14
%
8jii^c\heZZYiVWaZ[dg=HHXjii^c\
iddah#
(Cutting Speed x 4) / Tool Diameter = RPM
Note:
For carbide cutting tools, double the
cutting speed. These values are a guideline
only. Refer to the
MACHINERY'S HAND-
BOOK
for more detailed information.
