Manual for Singer Sewing Machine Model 1120

The Singer Model 1120 is a versatile mechanical sewing machine featuring straight stitch, zigzag stitch, buttonhole capability, built-in needle threader, adjustable stitch length and width, free arm design, built-in light, reverse stitching, and multiple presser feet. Powered by 120V AC, this machine is ideal for beginners and experienced sewers alike. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking and Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Stitch Selection 7. Threading and Bobbin 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Mechanical sewing head, built-in needle threader, free arm, stitch selection dial, tension control, bobbin winder, built-in light, foot pedal control.

Feature	Description
Stitch selection dial	Selects straight, zigzag, and decorative stitches
Built-in needle threader	Automatically threads needle for easy setup
Free arm design	Allows sewing of sleeves and other cylindrical items
Stitch length control	Adjusts stitch length from 0-4mm
Stitch width control	Adjusts zigzag width from 0-5mm
Reverse stitch lever	Reinforces stitches at beginning and end
Bobbin winder	Winds bobbin automatically while sewing
Built-in light	Illuminates sewing area
Tension control dial	Adjusts thread tension for different fabrics
Presser foot pressure	Adjustable for different fabric thicknesses

Unpacking and Setup

Unpack and inspect contents. Place on stable surface.

Remove machine from packaging: Lift machine by base, not by handwheel.
Attach power cord: Plug foot pedal into machine, then plug into wall outlet.
Install needle: Loosen needle clamp screw, insert needle with flat side to back.
Wind bobbin: Place bobbin on winder, thread through tension disc.
Insert bobbin: Drop bobbin into case with thread rotating counterclockwise.

WARNING! Machine is heavy; lift with care to avoid injury. Keep fingers away from needle during operation.

First-Time Operation

Power on machine; follow setup steps.

Thread upper thread: Follow numbered guides from spool to needle.
Use needle threader: Push lever down to automatically thread needle.
Pull up bobbin thread: Hold upper thread, turn handwheel toward you.
Test stitches: Use scrap fabric to test tension and stitch quality.
Adjust tension: Use dial to achieve balanced stitches.

CAUTION! Always turn off machine when threading or changing needle. Unplug when not in use.

Specifications

Machine Type: Mechanical sewing machine
Stitches: Straight, zigzag, blind hem, stretch, decorative
Stitch Length: 0-4mm adjustable
Stitch Width: 0-5mm adjustable
Buttonholes: 4-step buttonhole
Presser Feet: All-purpose, zipper, buttonhole, button sewing
Free Arm: Yes, for sewing sleeves and cuffs
Light: Built-in LED light
Power Source: 120V AC, 60Hz
Weight: 12.5 lbs (5.7 kg)

Controls and Settings

Main controls located on front and side of machine.

Stitch Selection: Turn dial to select stitch pattern. Stitch Length: Adjust for shorter/longer stitches. Stitch Width: Adjust zigzag width. Tension Control: Higher numbers for tighter tension. Reverse Lever: Hold down for reverse stitching. Handwheel: Manual control of needle position.

Accessory compartment contains additional presser feet, bobbins, needles, seam ripper, and screwdriver.

Stitch Selection

Dial positions for different stitch types:

Straight stitch: Basic sewing, topstitching
Zigzag stitch: Overcasting, decorative work
Blind hem stitch: Nearly invisible hems
Stretch stitch: For knit fabrics
Decorative stitches: Multiple pattern options
Buttonhole: 4-step process for perfect buttonholes

Tip: Always test stitch on scrap fabric before sewing project.

Threading and Bobbin

Proper threading ensures smooth operation.

Upper threading: Follow numbered guides from spool pin to needle.
Needle threader: Push lever down, hook thread, release lever.
Bobbin winding: Place spool on pin, thread through guides to bobbin.
Bobbin insertion: Drop in with thread coming off counterclockwise.
Bring up bobbin thread: Hold upper thread, turn handwheel.

WARNING! Ensure presser foot is raised when threading. Always use same thread type in bobbin and needle.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

Clean lint: Remove needle plate, clean bobbin area with brush.
Oil machine: Use sewing machine oil on moving parts as directed.
Needle replacement: Change needle after 8-10 hours of sewing.
Storage: Cover machine when not in use to prevent dust buildup.

CAUTION! Unplug machine before cleaning or maintenance. Use only sewing machine oil.

Regulatory Information

UL Listed: Complies with safety standards for household use. Copyright © 2025 Singer Manufacturing Company. All rights reserved. For support, visit www.singer.com or contact 1-800-4-SINGER. Made for household use only.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Thread breaking	Incorrect threading/tension	Rethread completely; adjust tension; check for burrs on needle.
Skip stitches	Wrong needle/damaged needle	Replace needle; ensure correct needle for fabric type.
Bobbin thread bunching	Incorrect bobbin threading	Remove and reinsert bobbin; check bobbin case.
Machine won't run	Power/pedal issue	Check power connection; ensure pedal is plugged in properly.
Uneven stitches	Tension issues	Adjust upper and bobbin tension; rethread both.
Noise during operation	Lint buildup/needs oil	Clean lint from bobbin area; oil moving parts.

Service: 1-800-4-SINGER; www.singer.com