SINGER 404K - Manual (Page 11)

Wind the Bobbins Evenly.
Bobbins must be wound evenly in order that they may work properly in
the machine. In winding them, see that the thread is placed smoothly and
evenly.
A correctly wound bobbin will insure the thread running smoothly
from the shuttle and prevent uneven stitching, which may occur if the bobbin
is not properly wound.
15K80,15K110, 99K (New Style), 185K, 201K, 327K, 328K and 329K.
If the thread does not wind evenly on the bobbin, loosen the screw which holds
the bobbin winder tension bracket (see 2, Fig. 8) on the machine bed and
slide the bracket to the right or left as may be required, then tighten the screw.
Always have a sufficient quantity of bobbins on hand and never wind
thread on a partly wound bobbin containing thread of another colour.
Bobbins so wound are usually uneven and cause trouble in the bobbin case.
When a rubber ring becomes worn or oil has come in contact with it, the
ring will not grip the wheel and will slip when winding a bobbin. A worn or
oily ring should be replaced.
Relative Sizes of Needles and Threads.
Needles used. Catalogue 2020 (15 x 1
T ypes of F abrics T hread S izes
M achin e
N eedle
S izes
M achin e S titches per I nch H and
N eedle
I nside S eams T op S titching
F ilmy M aterials
Comparable to Net—
Marquisette —Chiffon—
Silk—Chiffon Velvet—
Ninon—Nylon Sheers
100 Cotton
A Silk
Nylon
0 15-20 20-30 10
S heer M aterials
Comparable to Lawn—
Organdie—Dimity—Batiste
—Pure Silks—Paper Taffeta
—Silk—Synthetic Tricots—
Synthetic Sheers 80 to 100 Cotton
A Silk
Nylon
11
12-15 15-20 9
L ightw eight M aterials
Comparable. to Gingham—
Chambray Sheers—Wool
Crêpe—Taffeta—Synthetic
V el ve ts—Satin—Synthe tic
or Wool Jersey 50 to 80 Cotton
A Silk
Nylon
14
12
16 8
M edium L ightw eight
M aterials
Comparable to Poplin—
Pique—Percale—Cretonne
—Chintz—F aille—Bengaline
—Wool Flannel—Crêpe—
Lightweight Suitings
50 Mercerised
60 to 80 Cotton
A Silk
Nylon
14 12
16 7-8
M edium H eavy M aterials
Comparable to Cotton
Vel ve teen—Corduroy—
Gabardine—Rep—Coatings
and Heavy Suitings Heavy-Duty Mercer­
ised
40 to 50 Cotton
A Silk
16
10 12
6
H eavy M aterials
Comparable to Sailcloth—
Denim—T icking—
Overcoatings Heavy-Duty Mercer­
ised
30-40 Cotton
16-18 8 10
4-5
V ery H eavy M aterials
Comparable to Canvas—
Duck
40 to 60 Linen
20-24 Cotton
A Silk
18-19 6 8
o
O
P lastic M aterials
Nylon or
Mercerised Cotton 9-11
10 12
9-11
11