Singer 246-3 - Knife Sharpening; To Sharpen the Trimmer Knives

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
22
TO
SHARPEN
THE
TRIMMER
KNIVES
See
Figs.
28
and
29
Either
SINGER*
Knife
Grinding
Machine
701-7
(motor
driven),
ii lustrntecl
here, or
SINGER
Knife
Grinding
Machine
701-9
(belt
driven),
ure
necessrny
for
sharpening
the knives used on
Machines of Class
246.
The use
of
these
grinders
insures the
correct
bevel
of the
cutting
edge
of
each
knife.
Do
not attempt
to
sharpen these knives by hand.
When
ordering
Knife
Grinder
701-7,
the
desired
voltuge
IUll!Je
should
z
Fig. 28.
Sharpening
the
Movable
Knife
alwoys
be stutecl
Knife
Grinder
701-7
should
olwc1ys be
operated
within
the
voltu!Je rrn1ge
stu11q1ecl
on
the
rnotor
nome
plote.
l
he motor switch
is
shown
ut
H5.
To
sharpen
movable
knife
D4,
insert
it
in
the
knife
holcler
B5,
rn1
the
front
of
the
lever
mrn
A5,
then
tighten
the
thurnb screw
Z4.
Turn the th
urn
I) nut
E5
over
fr
rnn
you
until
the
knife
D4
clears
the
grindin!J
face
G5.
\/Vhile
rnovi11g
the
!ever
urm
A5
c1lte1
m1tcly l.mck
ur,d
fmth,
turn
the
thurnb nut
E5
C1S
required,
:o
brin!J
the
cutting
edge
of
the
knife
lightly
ogc1inst
the
gr
i11ding
face
of
the
wheel.
Co11ti1iue the IJc:ck
rn1cl
forth
motion
of
the
lever
arm,
grinding
off
only
enou~ih to
shmpen
the
cutting
edge.
The
rnovc1ble
knife
is
thus
ground
to u shcarin\J cdcJr,,
requirin!J
110
specicd
setting
in
th8
rnu-
chine
to
shear.
Fig.
29.
Sharpening
the
Stationary
Knife
To
sharpen the stationary knife J4,
insert it
in
the
knife
holder
K5,
011
the
rear
of
the
lever
mrn,
so
that
its
bevel
M5
is
prnollcl
with
the
qrincl-
ing
face
G5
of
the
grinding
wheel,
then
by
tu111i11!J
tlw
knurlecl
end
P5,
of
the lever
arm,
screw the lever
arm
into
the
knife
holcler
K5,
securi11~J
the knife.
Sharpen
the
knife
us
described
obove.
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