SINGER 251 - Manual (Page 8)

NEEDLES
The size of the needle to be used should be deter­
mined by the size of the thread which must pass
freely through the eye of the needle. Rough or uneven
thread, or thread which passes with difficulty through
the eye of the needle, will interfere with the successful
use of the machine. (See chart on page 4 to determine
Size as well as Class and Variety of needle required.)
A bent needle may cause the machine to skip
stitches, or it may make it difficult for the operator to
keep a perfectly even margin. In many cases, a run­
off will take place.
A hook or burr on the needle point will result in o
finish that looks blurred and when short stitches are
used (20 to 22 per inch), some materials may be cut.
Check needles often to make sure that defects are
not present.
Orders for needles must specify the Quantity re­
quired, the Size number, also the Class and Variety
numbers, separated by an x.
The following is an example of an intelligible order;
"100 No. 16, 88 X 9 Needles."
The best stitching results will be obtained by using
needles sold by Singer Sewing Machine Company.
The above needles are regularly furnished with
nickel finish but are also available with chromium
finish if so ordered.
TO SET THE NEEDLE
Turn the machine pulley over toward the operator
until the needle bar moves to its highest point.
After loosening needle set screw, insert needle UP
into needle bar AS FAR AS IT WILL GO, as instructed
in Fig, 8.
The single continuous groove of the needle MUST
face the left end of the machine, as shown in Fig. 8.
Securely tighten needle set screw.
NOTE: The needle is held in place, in Machines 251-2
and 251-3, by means of a needle clamp, instead of the
set screw in needle bar shown in Fig. 8.
MOVE TO
-^-HIGHEST '
POINT
loosen
SCREW
INSERT
NEEDLE UP
AS FAR AS
POSSIBLE
Fig. 8. Setting the Needle
(Mochine 251-1 )