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For Machines Mfg. Since 3/11 Turn-Nado
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EVS Lathes
-3-
INTRODUCTION
About This Machine
Foreword
"The screw cutting engine lathe is the oldest and
most important of machine tools and from it all
other machine tools have been developed. It was
the lathe that made possible the building of the
steamboat, the locomotive, the electric motor, the
automobile and all kinds of machinery used in
industry. Without the lathe our great industrial
progress of the last century would have been
impossible." —How To Run a Lathe, 15th
Edition, South Bend Lathe.
The lathe represented in this manual is a
modern day version of the screw cutting lathes
that trace their roots back to the 1700's, which
were themselves technological improvements of
the bow lathe that can be traced back thousands
of years to the ancient Egyptians.
Now, almost 300 years later, these modern
"screw cutting" lathes are not just a piece of
refined machinery, but a culmination of human
ingenuity and knowledge embodied into the
design and synergy of thousands of interworking
parts—some of which represent the life's work
and dreams of many inventors, mechanical
engineers, and world-class machinists—including
the likes of Leonardo da Vinci, Henry Maudsley,
and the founders of South Bend Lathe, John and
Miles O'Brien.
And now the torch is passed to you—to take
the oldest and most important type of machine
tool—and carry on the tradition. As the operator
of a South Bend Lathe, you now join the ranks
of some very famous and important customers,
such as Henry Ford, who used the machines he
purchased to help him change the world.
Features
As the name implies, these lathes feature EVS
(Electronic Variable Speed) spindle control
to "dial in" the perfect cutting speed for the
operation. One of four spindle speed ranges is
selected with the speed range lever, then the
exact speed within that range is chosen with the
spindle speed dial. The current spindle speed
is displayed with the digital tachometer on the
control panel.
The beds of these lathes are constructed with
Meehanite castings that are hardened and
precision-ground in the traditional three V-way
prismatic design—long used on South Bend
Lathes for its accuracy, durability, and rigidity.
The headstocks feature quick-change gear levers
and the carriages include an adjustable clutch
that disables automatic carriage feed when it
contacts the included feed stop or in the event of
a crash.
To further ensure a high degree of accuracy,
these lathes are equipped with high-quality
spindle bearings and a Fagor 2-Axis DRO. The
spindles are D1-8 camlock with an MT#7 taper
and 3.15" bore. The tailstocks have an MT#5
taper and 6.5" of quill travel.
The headstocks are equipped with a pressurized
oiling system that pre-lubricates the bearings
and gears before the spindle starts. This
guarantees that the headstocks are properly
lubricated in all start-up conditions, including
high-load/low-speed operations.
Finally, these EVS toolroom lathes are packed
with a premium Yaskawa Inverter, Allen-
Bradley contactors, thermal relays, and fuse
system. Also included are a complete coolant
system, an easy-to-clean chip drawer, one-shot
way lubrication system, ball bearing steady
rest and brass-tipped follow rest, adjustable
work lamp, foot brake, and automatic feeding
capabilities for both the X- and Y-axis.
Capabilities
These EVS Toolroom Lathes are built for daily
use in a busy industrial setting. Loaded with
many nice features and high-precision parts,
these lathes excel at making fine tools, dies,
thread gauges, jigs, and precision test gauges—
however, they are by no means delicate. Thick
castings, heavy weight, and quality construction
throughout provide the necessary brawn for
demanding production and manufacturing tasks.