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Craftsman 351.275931 Operator's Manual page 3

Compound milling table
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U-CLAMP
• U-clamp can be used to clamp thicknesses up to 2".
• Position workpiece; it should rest flat on table prior to
clamping.
• For clamping, use edge of U-stamp which is closest to ball
joint because a greater force is created at this edge.
• Make sure U-clamp can rest on workpisce and table with
hole in ball joint over a slot in table.
• Slide stud with T-nut into slot.
• Slide U-clamp over stud and into position to clamp on as
much of the workpiece as possible.
• Screw the flange nut onto stud.
• Make sure T-nut is properly shouldered in slot and the stud
is perpendicular to table.
• Tighten flange nut to securely clamp workpisce.
T-NUT
For a proper
clamping configuration,
T-nut should
be
shouldered
within T-nut slot or open slot of work table.
• T-nut must be connected
to threaded
stud. T-nut has thread
stops: screw
stud into T-nut until thread stops.
• With a T-slotted
table, studs should
be connected
before
inserting
stud with T-nut into table.
• With an open slotted
table, studs san not be connected
until after stud with T-nut is inserted
through
slot.
ADJUST
POSITION
• Motion toward or away from operation is adjusted with
cross feed screw by turning handwheel on the front.
• Motion from side te side is adjusted with longitudinal feed
screw by turning handwheal on either side.
• Use handwheels to move table to desired position. Make
sure that table motion is smooth, Adjust wear plates if nec-
essaFy.
ADJUST
WEAR
PLATES
Refer to Figure 1.
• Wear plates (Key No. 16) are used to minimize
play within
guide grooves.
• Wear plates should
be s_usted
to produce
a uniform
drag
for entire length of travel.
Both wear plates should
be adiusted
in the same manner.
Loosen
he)( nuts (Key No. 24),
• Adjust
drag of wear plate by applying
an equal amount
of
torque
to each set screw (Key Nos. 23 and 25) st each end
of the wear plates. Adjust
the screws until a slight drag is
felt when
rotating
the handwheeL
Lock set screws into position by holding
position
with an
L- wrench
and tightening
hex nuts.
INDEXING
TABLE
MOTION
• Index collar rotates with handwheel but can be repositioned
to calibrate table feed, Position table at a convenient refer-
ence point.
• Turn handwheel to move table opposite to the direction
which it will travel. Slowly turn handwheal to bdng table
back to reference point. This wili take out play in feed
screw.
• Hold handwheal steady and rotate index collar to align it
with scale.
• Index collar can be calibrated to inc_cate relative distance
traveled in same direction. Collar must be indexed again to
accurately indicate distances in opposite direction.
OPERATING
GUIDELINES
Refer to Figure 1.
Do not attempt
to take heavy cuts. It may "grab" and ruin
your workpisce,
break cutter,
or damage
equipment.'The
choice
of cut must be proportional
to dgidity of set up,
capability
of equipment,
choice
of milling cutter, and hard-
ness of workplace.
Direction
of feed should
always
be against
direction
of cut-
ter rotation.
• Avoid vibration
during
milling operation.
Correct
this by
using a cutter with a different
number
of teeth, by changing
speed of cutter
rotation,
or by adjusting
feed of cuL
Covering
the opening
over cross feed screw
(Key No. 21),
in front and back, is recommended
to prevent
any chips
from dropping
on threads
of screw
and on table base.
• Tighten
center
set screw (Key No. 25) to secure position
if
required.
• After completing each milling operation, clean all chips off
table and out of T-slots with a hard bristle brush.
• Keep threads
of cross and longitudinal
feed screws oiled
and free of foreign
matter.
• KeeP table top, all machined
sur[aces
and moving
parts
lubricated,
• Periodically turn handwheels to move table right and left,
back and forth, and full length o1 travel. This will keep the
Milling Table in good working condition.
3

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