CLAUSING 5910 Series - Lathe Controls and Operations; Understanding Direct Drive and Back Gear; Headstock and Spindle Speed Controls

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CONTROLS AND OPERATIONS
Do not operate lathe until you are thoroughly familiar
with all controls and their functions. The machine
is shipped from factory with gears set for direct drive
and carriage locked to bed. Read the instructions
carefully. Then, first operate the lathe in back gear- -
get the "feel" of the controls -- set up different
threads and feeds - - engage the power feeds -- gee
acquainted with the lathe before you start a job - - it
will save time and produce better work.
HEADSTOCK
The totally enclosed headstock houses and supports
the spindle, spindle bearings and driving gears.
Gears, shafts, bearings and spindle bearings tra-
vel in a bath of oil.
BACK GEAR CONTROLS
BACK GEAR DRIVE provides the slow spindle speeds
from 5 2 to 280 rpm requi re d for heavy cues and cor-
rect surface speeds for large diameter work.
WPORTANT: The back gear knob should not be
moved from one position to another unless motor
is in "OFF" position_ Spindle must come to a com-
plete stop before changing drives.
59 10
To engage the back gear drive:
L Stop larhe spindle.
Figure 5
2. furn back gear knob (figure 5) to the left - - ro tal e
spindle by hand if ge ars do not me sh.
3, Disengage back gear pin from drive pulley by
pulling pin away from headstock.
7 .1
DIRECT DRIVE provides high spindle speeds from
360 co 2000 rpm.
To engage direct drive:
L Stop spindle.
2, Turn back gear knob to the right,
3. Engage the back gear pin with drive pulley by
pushing pin towards headstock - - rotate wheel if
necessary.
SPINDLE SPEEDS
Speeds are changed hydraulically. Control dial,
located on top of the headstock, actuates hydraulic
system . Speeds - - between 52 and 280 rpm in back
gear dri ve, and 360 to 2000 rpm in direct drive - -
are obtained by turning the dial control.
Caution: DO NOT TURN CONTROL DIAL UNLESS
MOTOR IS RUNNING - - it makes dial reading in-
correct in terms of spindle rpm.
NOT E : Hydrau li c system , however, 1s equipped with
a by-pass valve that prevents da mage if control dial
is accidently turned while motor is not running.
Figure 6
If dial reading is inco rr ect :
L Start the motor - - turn variable speed control
to 360 rpm (52 rpm if l athe is in b ack gear) - -
refer to figure 6.
2. Hold at this speed, exerting slight pressure for
30 seconds.