Sherline 5000 Mill Assembly Instructions

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that came with your machine, it should have made the cut
easily. If the tool “squealed,” reduce the RPM a little and
take another .050" cut while feeding the tool faster. You
will probably be surprised at how easily your machine takes
cuts this heavy.
INDUCING CHATTER AND LEARNING
HOW TO OVERCOME IT
To better understand what is going on, we will now purposely
try to make the machine “chatter.” Make sure the stock
you are cutting is sticking out of the chuck no more than 1
inch (25 mm). Crank the handwheel two turns further in
from the last setting which will give you a .100" (100
thousandths of an inch) or 2 mm cut. Set the spindle speed
to about 1000 RPM (1/3 speed) and feed the tool slowly
into the material. Vary speed and feed until you get a
substantial chatter. Without changing the depth of the cut,
drop the speed to about 200 RPM and feed the tool into the
work with more force. The chatter should disappear. Once
you have learned to control chatter by adjusting speed and
feed, you will be well on your way to becoming a machinist.
HOLDING THE WORKPIECE
Work can be held between centers, in 3-jaw or 4-jaw chucks,
on the faceplate or with a collet. Sometimes it is necessary
to use a chuck and center, and, if the work is spinning fast,
a live center should be used. (See Figures 26, 27 and 28.)
TURNING BETWEEN CENTERS
This is done by fitting the dog to the work which is to be
turned and placing the work and dog between the centers
in the headstock and tailstock. The maximum diameter that
can be held with the dog is 5/8" (15 mm). (See Figure 28.)
The dog is driven by fitting it into one of the faceplate holes.
This method of turning is ideal for bar work or turning of
steps on a bar. The tailstock center must be greased to
prevent overheating. (An optional live center—such as
P/N 1191—turning on ball bearings is the solution preferred
by most machinists.) The headstock spindle has a #1 Morse
taper in the spindle nose. The tailstock spindle has a #0
Morse taper.
TAILSTOCK GIB
FIGURE 25—Lathe part terminology
DC MOTOR
HEADSTOCK
SPINDLE
“V” BELT
2-SPEED
STEPPED PULLEY
FACEPLATE
LATHE DOG
HEX KEYS
CROSSLIDE FEED
HANDWHEEL
LATHE BASE
SPEED CONTROL
ASSEMBLY
HEADSTOCK
HEADSTOCK
CENTER
TOOL POST
CROSSLIDE
SADDLE
BED
TAILSTOCK
CENTER
TAILSTOCK SPINDLE
TAILSTOCK
HEADSTOCK
LOCKING SCREW
SADDLE NUT
ADJUSTMENT
SCREWS
TAILSTOCK FEED
HANDWHEEL
TAILSTOCK
LOCKING
SCREW
LEAD SCREW
HANDWHEEL
TAILSTOCK DRILL CHUCK
DRAWBOLT
AND WASHER
NO. 1
MORSE
ARBOR
CHUCK KEY
SPINDLE BARS
SPEED CONTROL KNOB
ON/OFF SWITCH
TAILSTOCK SPINDLE LOCK
3-JAW
CHUCK
TAILSTOCK GIB
FIGURE 26—Holding a round work piece in a 3-jaw
chuck