Singer 72W19 - Page 22

function of the auxiliary piercer is to open the material in
advance of the piercer, it must be set in correct relation to the
length of stitch, so that the advance perforations made by it
may be correctly entered by the piercer and needles.
Needle Bar
jj 1-j-r
Fig.16
Front view
Needle Bar
/| ill 1
00 I 0 @ 00
Fig. 17
Back view
For Machines of Class 72w. Showing the needle bar with the hinged needle
holders, auxiliary piercer, and needle vibrating levers, front and back views
B—Needle Bar.
S—Needle Set Screws.
K—Needle Holders.
O—Needle Holder Bracket.
JS—Needle Holder Bracket Screw
R—Needle Holder Hinge Screws,ad
justable, to change the perma
nent location ofthe needle hold
ers toward or from each other
00—NeedleHolderHingeScrewNuts
J—Needle Vibrating Levers. For a
fine adjustment of needle vi
bration, turn slightly to the
left or right as required.
Q—Needle Vibrating Lever Screws.
JJ—Thread Guide (double).
T—Auxiliary Piercer.
U—Auxiliary Piercer Holder.
P—Auxiliary PiercerHoIder Screw.
PP—AuxiliaryPiercerHolderBracket
SP—^AuxiliaryPiercerHolderBracket
Screws.
W—Auxiliary Piercer Set Screw.
From the library of: Superior Sewing Machine & Supply LLC