Singer Class 7 (black and white scan) — User manual

Form 8183
Revised

 (541)

     INSTRUCTIONS

                 FOR USING

SINGER SEWING MACHINES

                OF
      CLASS 7
     ONE NEEDLE          LOCK STITCH

       SINGER

      SEWING


      MACHINE



THE SINGER MANUFACTURING CO.

                                              PRINTED IN U. 8. 4

USE ONLY SINGER OILS
      and LUBRICANTS

  They insure freedom from lubricating trouble and
         give longer life to sewing equipment




  "Singer Oil for High Speed Sewing Machines"
                      Cloth and Leather)
        For all manufacturing sewing machines except where a stainless
          oil is desired.


  "Singer Stainless Oil for High Speed Sewing Machines"
        For all manufacturing sewing machines where a stainless oil is
         desired.

"Singer Motor Oil"

         For oil-lubricated motors, power tables, transmitters and machin-
          ery in general.

"Singer Stainless Thread Lubricant"
        For lubricating the needle thread of sewingmachines for stitch-
        ng fabrics or leather where a stainless thread lubricant is required
       NOTE: All of the above oils are available in 1 quart, 2 quart, 1 gallon
        and 5 gallon cans or in 55 gallon drums, and can also be supplied
          in customers containers.



"Singer Gear Lubricant"
        This specially prepared grease is recommended for gear lubrica-
          tion on manufacturing sewing machines.

"Singer Ball Bearing Lubricant"

         This pure grease is specially designed for the lubrication of ball
         bearings and ball thrust bearings of motors and electric trans-
          mitters, ball bearing hangers of power tables, etc.
      NOTE: The above greases are furnished in ¼ lb. tubes and 1 lb.
       and 4lb. lins.


              Copy right, U.S. A., 1914, 1916, 1935, 1937 and 1941,
                    by The Singer Manufacturing Company
                         All Rights Reserved for All Countries

8183
   INSTRUCTIONS

         FOR USING

SINGER SEWING MACHINES





                          SINGER





      OF CLASS 7

  ONE NEEDLE         LOCK STITCH


THE SINGER MANUFACTURING CO.

To all whom it may concern:

   The placing or renewal of the name "Singer" (Reg. U.S.
Pat. Of.) or any of the trade marks of The Singer Manu-
facturing Company on any machine that has been repaired,
rebuilt, reconditioned, or altered in any way whatsoever
outside a Singer factory or an authorized Singer agency
is forbidden.





          THE IMPORTANCE OF USING
     GENUINE SINGER PARTS AND NEEDLES
             IN SINGER MACHINES

   The successful operation of Singer machines can only be
assured if genuine Singer parts and needles are used. Sup-

plies are available at all Singer Shops for the Manufacturing
Trade and mail orders will receive prompt attention.





               Genuine Singer Needles should be used
                           Singer Machines.
                 These Needles and their Containers
                       are marked with the
              Company's Trade Mark "SIMANCO."


                    Needles in Containers marked
                      "For Singer Machines"
                     are not Singer made needles.

5
   The size of the needle to be used depends upon the size of
the thread which must pass freely throughthe eye of the needle.
   Do not use rough or uneven thread or thread which passes with
difficulty through the needle eye, assuch thread will interfere
with the successful use of the machine.
    Orders for needles must specify the QUANTITY required, the
SIZE number, also the CLASS and VARIETY numbers, separated by an
x. The following is an example of an intelligible order:
                   "100 No. 19, 7 x 1 Needles"
                  "100 No.21, 7 x 2 Needles"
    The best stitching results will be obtained bythe use of
needles furnished by the Singer Sewing Machine Company.

                              Thread

    Left twist thread should be used in the needle. Either right
                                or left twistthread can be
                                   used in the bobbin.
                                      Hold the thread as shown
                               in Fig.3. Turn the thread
                                  over toward you between the
                                  thumb and forefinger of the
                            E1739        right hand; if left twist,
                                   the strands will wind tight-
                                er;  if right twist,  the
 Fig.3. How to Determine the Twist  strands will unwind.

                       To Remove the Bobbin

   Turnthe balance wheel
to bring the needle bar to
its lowest position; then,
with the curve of the Shut-
tle Cylinder Opener 120571,
shown in Fig.4, conforming
to the curve of the shuttle
cylinder,insert the small
end of the shuttle cylinder
opener in the slot (B)in
the spring latch beneath
the shuttle cylinder, as
shown in Fig.4.Press the
latch away from the cylin-
der and turn the cylinder
outward or toward the left
as far as it will go, as
shown in Fig.4, and the      Fig.4. Shuttle Cylinder
bobbin will drop out.              Opener 120571 in Use

To Wind the Bobbin

     Place the bobbin on the bobbin winder spindle and push it up
  closely against the shoulder, having the small pin in the shoulder

 enter the slot in the bobbin.





                                                      112810




                       F1g.5. Winding the Bobbin

   Pass the thread from the unwinder through the hole in the
left side of the bobbin from the inside.Push the bobbin winder
 pulley up against the balance wheel and place the bobbin winder
latch in position as shown in Fig. 5.  Then start the machine.
The end of the thread must be held until a few coils are wound,
and should then be cutoff. When sufficient thread has been wound
upon the bobbin, the bobbin winder will stop automatically.

            To Replace the Bobbin and Thread the Shuttle

    Take the bobbin between the thumb and forefinger of the left
hand, with the thread drawing off from the underside toward the
right as shown in Fig.6, page 7. Place the bobbin in the cylinder
as far as it will go, draw the thread into the slot (1,F1g.6) 1n

the cylinder and under the tension spring into the delivery eye
(2, F1g.6), then push the cylinder back until it is locked by the





                                            E12993


          F1g.6. Replacing the Bobbin and Threading the Shuttle

springlatch,and allow about three inches of thread to hang free
from the shuttle with which to commence sewingas shownin F1g.7.





                                                 E12902


             F1g.7. Bobbin Replaced and Shuttle Threaded

8
                     To Set the Needle

     Turn the balance wheel over toward you until the needle bar
 moves up to its highest position;  loosen the set screw in the
 needle clamp and put the needle up into the clamp as far as it
 will go, with the long groove of the needle towardthe left and
 the eye directly in line with the arm of the machine, then tight-
 en the set screw.
                      To Thread the Needle

                  (Operator Facing Front of Machine)
     Turn the balance wheel over toward you until the threadtake-
 up lever (8,F1g.9), on page 9, moves up to its highest position.

                              3   4      8




                    SINGER

                        2           C





                                                                         £15747


            Fig.8. Threading the Needle on Machine 7-31

   Pass the thread from the unwinder, or from the spool on the
spool pinon top of the machine, through the eyelet (1,F1g.8).
Raise the l1d of the cup (C,Fig.8) and pass the thread through
the hole at the end of the thread post (2,F1g.8) under the l1d.
Then close the lid and pass the thread through the eyelet (3,F1g.
8), over from right to left between the thread retainer discs (4,
F1g.8), down under and from right to left around the tension wheel
(5,F1g.8), 1nto the 100p of the thread take-up spring (6, F1g-8),
under the staple (7,F1g6.8 and 9), up and from back to front
chrough the hole (8,F1gs.8 and 9), in the thread take-up lover,
down through the thread guide (9,F1g.9), into the slot (10,F1g.9)

9

 in the Vibrating presserbar, into thread guide (11,F1g. 9)  on
theneedle clamp, and from left to right through theeye of the





          9


          10

              11


                                             13


                 12

                                         E12885




            F1g.9. Threading the Needle on Machine 7-31


needle (12,F1g.9), then pass the thread down through the hole in
the lifting presser foot (13,F1g.9). Draw about four inches of
thread through the hole in the lifting presser foot with which to
commence sewing.
    If 1t is not desired to 011the thread, the threadshould be
omittedfrom the cup (C,F1g.8).

10

                     To Prepare for Sewing

    With the left hand hold the end of the needle thread, leaving
1tslack fromthe hand to the needle. Turn the balance wheel over





                                                       2356


                F1g. 10. Drawing Up the Bobbin Thread

toward you until the needle moves downand up again to its highest
position, thus catching the bobbin thread; draw up the needle
thread and the bobbin thread will come up with it through the hole
in the throat plate (see F1g.10). Lay both threads back under the
presser feet.


                     To Commence Sewing

    Placethe material beneath the presser feet, lower the presser
feet and commence to sew, turning the balance wheel over toward
you.


                      To Remove the Work
    Stop the machine with the thread take-up lever restingat its
highest position; draw about three inches of thread through the
thread retaining discs, raise the presser feet, draw the work back
and cut the threads close to the goods.  Leave the ends of the
threads under the presser feet.

11


                              Tensions

    For ordinary stitching, the needle and bobbin threads should
be locked in the center of the thickness of the material, thus:

        BEDER 1754

                     F1g.1l. Perfect Stitch


    If the tension on the needle thread   too tight, or if that
on the bobbin thread 1stoo loose, the needle thread will lie
straight along the upper surface of the material, thus:





                 Fig. 12. Tight Needle ThreadTension

    If the tension on the bobbin thread 1s too tight or 1f that
on the needlethread 1s too loose, the bobbin thread will l1e
straight along the under side of the material, thus:





                 F1g.13. Loose Needle Thread Tension



                    To Regulate the Tensions

    The tension on the needle thread is regulated by the thumb nut
(H,F1g. 15, page 13) at the front of the thread retainer discs, and
the thunt nut (J,Fig. 15, page 13) at the front of the tension wheel
The tension on the thread retainer discs should be only enough to
cause the tension wheel to turn when the thread is taken from the
spool.
    The tension on the bobbin thread is regulated by the screw
 (A, F1g. 7, page 7) which holds the tension spring to the cylinder.
To increase the tension, turn the screw over to the right. To
decrease the tension, turn the screw over to the left.

12
                To Regulate the Length of Stitch

     The length of the stitch is regulated by the thumb screw (G,
 Fig. 14) in the slot on the front of the upright part of the arm.
 To lengthen the stitch, loosen the thumb screw and move it down-
 ward. To shorten the stitch, loosen the thumb screw and move 1t
 upward. When the desired length of stitch is obtained, tighten
 the thumb screw.

                To Regulate the Pressure on the Material

    The pressure on the material is regulated by means of the
hexagon head screw (D,F1g.14). Loosen the hexagon head lock nut
 (E, F1g.14) and turn the screw (D) to the right to increasethe
 pressure, or to the left to decrease the pressure.  When the
 desired pressure has been obtained, hold the screw (D) with a
wrenchto keep it from turning while the lock nut (E) 1s being
 tightened against the bracket (F).
    The pressure should be only heavy enough to enable thefeed
 to move the work along evenly, and to prevent the work from ris-
ing with the needle.
                     To Oil the Machine

    To insure easy running and prevent unnecessary wear of the
machine, all parts which are inmovable contact require o1ling


                F


                     SINOCK


                    G





            F1g. 14. 0111ng Points at Front of the Machine

13


and when the machine is in continuous use, o1l should be applied
frequently. The places where the machine should be oiled are in-

                                  H



                    SINGER





             F1g.15. 0111ng Pointsat Back of Machine

dicated in Figs. 14 and 15by arrows pointing to the oil holes
and bearings.  01l should be regularly applied to the shuttle
race, also in the hole in the hub of the friction driving pulley.
    On the back of the arm is a round plate or cover, fastened by
a screw; loosenthe screw, turn the plate upward and fasten by
tightening the screw.  Care should be taken to see that all the
moving parts insideare sufficiently lubricated. Then turn the
cover back into position and tightenthe screw.

Genuine Singer Needles should be used
          in Singer Machines.
  These Needles and their Containers
         are marked with the
 Company's Trade Mark "SIMANCO." 1



    Needles in Containers marked
       "For Singer Machines"
      are not Singer made needles.   2

MANFG. CO   THE SINGEA


      SHOE NIS





This Trade Mark is on the Arm
of Every Singer Sewing Machine