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OPERATION MANUAL
5.4 HORIZONTAL SETUP (HM-54GV)
The horizontal spindle on the model HM-54GV can
be used for single or multiple cutters (gang milling).
They can be arranged anywhere along the length of
the arbor for simple to very complex cutting opera-
tions.
To setup for horizontal use:
1. DISCONNECT THE MACHINE FROM THE POWER!
2. Rotate ram 180° until horizontal arbor support
is in-line with horizontal spindle (Fig. 5.10).
Note:
Make sure the “0” marks on the ram base and
angle scale are aligned and the four ram rotation
hex nuts are retightened.
3. Extend the ram until horizontal arbor is all the
way forward.
4. Loosen locking bolt on side of arbor support,
and slide support off ram dovetail way.
5. Clean any debris or surface substances from
inside spindle taper and mating surface of the
arbor.
6. With one hand holding arbor in place, insert
horizontal drawbar into spindle from rear of
column, then thread it into arbor.
8. Tighten drawbar until it is snug.
Avoid overtightening as this could damage the
thread on the drawbar.
9. After the cutters have been placed on the arbor,
then slide the arbor support onto the dovetails
on the ram and line up the support bush on the
arbor.
F
ig
. 5.10
F
ig
. 5.11
5.5 CHANGING THE SPINDLE SPEED
It is important for the correct spindle speed to be set to optimize the best performance, as well
as maximizing tool life.
When setting the spindle speed for the operation, two things need to be observed:
(1) Determine the best spindle speed for the cutting task,
(2) Configure the mill controls to match the closest spindle speed
Determining Spindle Speed
The two most important variables recommended for
considering the cutting speed are the workpiece materi-
al and the diameter of the cutting tool, when caculating
the speed using the equation in Fig. 5.12.
Cutting speed, typically defined in meters per minute
(MPM), is the speed at which the edge of a tool
moves across the material surface
(rpM) = c
utting
s
peed
M
/
Min
x
1000
c
utter
d
iaMeter
x
3.14
F
ig
. 5.12
08/11/2019
Instructions Manual for HM-54GV (M579)
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