Singer 1120 Mechanical Sewing Machine
Principal parts Of the machine
- Thread tension dial
- Presser foot pressure adjustment
- Thread take-up lever
- Thread Cutter
- Presser foot
- Needle plate
- Removable sewing table,’ accessory storage
- Bobbin stopper
- Stitch length dial
- Stitch Width dial
- Pattem indicator window
- Reverse sewing lever
- Automatic threader (optional)
- Horizontal spool pin
- Bobbin winder
- Hand-wheel
- Pattern selector dial
- Power and light switch
- Main plug socket
- Bobbin thread guide
- upper thread guide
- Faceplate
- Handle
- Presser foot lever
- Foot speed control
- Power cord
Accessories
Standard accessories (1)
- a. All purpoæ toot
- b. toot
- c. Buttonhole toot
- d. Button sewing toot
- e. L-screwdriver
- f. Seam roper/ brush
- g. Oil bottle
- h. Pack ot
- I.Bobbin (3x)
- j. Seam guide
- k-Darning plate
- L. Spool holder
Optional accessories (2)
(These 6 accessories are not supplied with this machine; they are however available as special accessories from your local dealer.)
- m. Satin stitch foot
- n. Overcasting foot
- 0. Hemmer foot
- p. Blind hem foot
- q. Cording foot
- r. Darning foot
Installing the snap-in sewing table
Keep the snap-in sewing table horizontal, and push it in the direction Of the arrow. (1)
The inside Of the snap-in sewing table can be utilized as an accessory box. TO open, lift at the point Of the arrow. (2)
Connecting the machine to a power source
Connect the machine to a power source as illustrated. (1) This appliance is equipped With a polarized plug Which must be used With the appropriate polarized outlet. (2)
Foot control
The foot control regulates the sewing speed. (3)
Sewing light
Press main switch (A) for power and light on ” I
- a. Polarized attachment plug
- b. The conductor intended to be grounded
Changing the bulb
Disconnect the machine from the power supply by removing the plug from the main socket!
- Loosen screw (A) as illustrated. (1)
- Remove the face plate (B).
- Unscrew the bulb and install a new one (C). (2)
- Replace the face plate and tighten the screw. Should there be any problem, ask your local dealer for advice.
Two-step presser foot lifter
When sewing several layers or thick fabrics the presser can be raised to a high-rise position for ease of the work. (A)
Adjusting presser foot pressure
The presser foot pressure of the machine is preset and requires no particular readjustment according to the type of fabric weight). However, if you need to adjust the presser foot pressure, turn the presser screw with a coin. For sewing very thin loosen the pressure by turning the screw counter counterclockwise, for heavy fabrC tighten it clockwise.
Attaching the presser foot shank
Raise the presser bar (a). Attach the presser foot shank (b) as illustrated. (1)
Attaching the presser foot
- Lower the presser foot shank (b) until the cut out (c) is directly above the pin (d). (2)
- Raise the lever (e).
- Lower the presser foot shank (b) and the presser foot (f) will engage automatically.
Removing the presser foot
- Raise the presser toot. (3)
- Raise the lever (e) and the foot disengages.
Attaching the seam guide
Attach the seam guide (g) in the slot as illustrated. Adjust according to the need for hems, pleats, etc. (4)
Winding the bobbin
- Place thread and spool hazer onto the spool pin For smaller spools of thread place the spool holder on the small side next to the spool (2).
- Wind thread clockwise around bobbin winder tension discs Thread bobbin as illustrated and place on spindle
- Push the bobbin to the right
- Hold thread end
- Step on the foot control pedal
- Cut thread
- Press the bobbin to the left (9) and remove it.
Inserting the bobbin
When inserting or removing the bobbin, the needle must be fully raised.
- Open-hinged cover
- Hold the bobbin case with one hand. Insert the bobbin so that the thread runs in a clockwise direction (arrow)
- Pull the thread through the slit and under the finger Hold the bobbin case by the hinged latch
- Insert it into the shuttle (5).
Inserting and changing needles
Change the needle regularly, especially if it is showing signs of wear and causing problems. For best sewing results always use SINGER Brand Needles.
Insert the needle as illustrated as follows:
- A. Loosen the needle clamp screw and tighten again after inserting the new needle. (I)
- B. The flat side of the shaft should be towards fie back.
- C/D. Insert the needle as far up as it will go.
Needles must be in perfect condition. (2) Problems can occur with:
- A. Bent needles
- B. Blunt needles
- C. Damaged points
Threading the upper thread
This is a simple operation it is important to carry out correctly as by not so several sewing prp&ems could
- Start by raising the needle to its (I), also raise the presser foot to release the tension ‘$scs_ (2)
- Ldt up the pin. Place the pot on the with the thread off the spool as shown. For small thread small side lot next to
- Draw from the spool through the thread gu%2. (4)
- Guide thread around thread guide (5) thread through spring as illustrated pre-tension rnMuIe by thread down right and left channel this %ocess it is to hold the between the and thread guide.
- At the top of this movement pass the thread from right to left through the slotted eye of the take-up lever and then downwards -vain -(7)
- Now pass thread the thin Wire needed damp guide (d) and then $wn to the which should from front to back. Pull about 5-8 inches to thread to the rear of the eye. Trim thread to length with a built-in thread cutter. (9)
Automatic needle threader (optional)
The automatic needle threader is a factory-installed option. If your machine has this option use the following instructions:
- Raise the needle to its highest position.
- Press lever (A) down as far as it will go.
- The threader automatically swings to the threading position
- Pass thread around the thread guide
- Pass the thread in front of the needle around the hook (D) from bottom to top.
- Release lever (A).
- Pull the thread through the needle’s eye.
Thread tension
Upper thread tension
Basic thread tension setting: “4”
To increase the tension, turn the dial to the next number. To reduce the tension. tum the dial to the next down.
- A. Normal thread tension to straight stitch sewing.
- B. tension too loose tor straight stitch Turn dial to higher number.
- C. tension too tight for straight stitch sewing. Turn the dial to a lower number.
- D. Normal thread tension for mg zag and Correct thread is when a small amount of the upper thread appears on the bottom side of the fabric.
Lower thread tension
To test the bobbin thread tension, remove the bobbin case and bobbin and hold it by suspending it by the thread. Jerk it once or twice. If the tension is correct, the thread will unwind by about an inch Or two. If the tension is too tight, it does not unwind at all. If the tension is too loose, it will drop too much. TO adjust, turn the small screw on the side Of the bobbin case.
Raising the bobbin thread
Hold the upper thread with the left hand. Turn the handwheel (1) towards you (counterclockwise) lowering, then the raising needle.
Gently pull on the upper thread to bring the bobbin thread up through the needle plate hole (2). Lay both threads to the back under the presser foot. (3)
Reverse sewing
To secure the beginning and the Of a seam, press down the reverse sewing lever Sew a few reverse stitches. Release the lever and the machine Will sew forward again.
Removing the work
Turn the handwheel counterclockwise to bring the thread take-up lever to its highest position, raise the Fresser foot, and remove work behind the needle and presser foot. (2)
Cutting the thread
Pull the threads behind the presser foot. Guide the threads to the side Of the face plate and into the thread Cutter Pull threads down to cut (3).
Matching needle/ fabric/ thread
NEEDLE, FABRIC, THREAD SELECTION GUIDE 
NEEDLE, FABRIC SELECTION
Maintenance
Remove the needle plate
Turn the handwheel until the needle is fully raised. Open the hinged front cover and unscrew the needle plate screws with the screwdriver (1).
Cleaning the feed dogs
Use the brush supplied to clean the whole area (2).
Cleaning and lubricating the hook
Remove the bobbin case. Snap the two hook-retaining arms (3) outwards. Remove the hook race cover (4) and the hook (5) and clean with a soft cloth. Lubricate at the point (6) (1-2 drops) with sewing machine Oil. Turn the handwheel until the hook races (7) in the left position. Replace the hook (5). Replace the hook race cover and snap back the two hook retaining arms. Insert the bobbin case and bobbin and replace the needle plate.
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Singer 1120 Mechanical Sewing Machine-FAQs
What is the purpose of a mechanical sewing machine?
Mechanical sewing machines are designed to stitch materials, mainly fabric, together using a needle and thread, reducing the need for manual sewing.
Can I use any type of thread with a Singer sewing machine?
For optimal results, use high-quality threads like Gutermann, Coats & Clark, or Mettler. These ensure better stitch quality, seam strength, and project durability.
How do I create a hem with a sewing machine?
To hem, fold the fabric’s edge once, then fold it again to enclose the cut edge. Stitch along the fold to secure it and prevent unraveling.
What is a spool pin, and what is its function?
A spool pin is a small rod on the sewing machine that holds the thread spool in place during sewing. It is designed to fit various spool sizes and types.
How do I adjust the tension on my sewing machine?
Thread the needle and bobbin, then test the seam on a sample fabric. Adjust the upper-tension assembly until you achieve balanced stitches.
What should I do if my sewing machine isn’t sewing correctly?
Common issues like thread breakage or tangling can result from improper threading, dull needles, or incorrect tension. Inspect the thread path, use quality thread, and ensure proper tension to resolve the problem.
Which is better: mechanical or automatic sewing machines?
Mechanical sewing machines are ideal for beginners who prefer manual control, while automatic machines offer convenience with self-adjusting features. Choose based on your skill level and needs.