Singer Model 348 Manual

The Singer Model 348 is a classic straight-stitch sewing machine known for its reliability and durability. This manual covers essential information for setup, operation, maintenance, and troubleshooting. Key features include a built-in light, reverse stitching capability, adjustable stitch length, and a variety of presser feet for different sewing tasks. Below are the main sections for getting started and using your machine effectively.

Features at a Glance

Key components: Sewing head with built-in light, Reverse stitch lever, Stitch length dial, Bobbin winder, Presser foot lifter, Handwheel, Foot pedal control.

Feature	Description
Built-in light	Illuminates the sewing area for better visibility
Reverse stitch lever	Allows backward stitching to secure seams
Stitch length dial	Adjusts stitch length from 0 to 4 mm
Bobbin winder	Winds thread onto the bobbin automatically
Presser foot lifter	Raises and lowers the presser foot
Handwheel	Manually controls needle position
Foot pedal	Controls sewing speed; plug into machine
Thread tension dial	Adjusts upper thread tension for balanced stitches
Needle clamp screw	Holds needle securely in place
Accessory storage	Compartment for presser feet and tools

Unpacking and Setup

Carefully unpack all components. Place machine on a stable, flat surface.

1. Remove protective packaging from machine and accessories.
2. Attach foot pedal: Plug cord into machine port.
3. Connect power: Plug machine into a standard 120V AC outlet.
4. Install needle: Loosen needle clamp, insert needle flat side back, tighten screw.
5. Wind bobbin: Follow threading diagram; place bobbin on winder spindle.

WARNING! Keep fingers away from needle area during operation. Ensure machine is unplugged during setup.

Threading the Machine

Proper threading is essential for smooth operation.

1. Raise presser foot and needle to highest position using handwheel.
2. Place spool on spindle; guide thread through upper threading path as marked.
3. Thread take-up lever from right to left.
4. Pass thread through needle eye from front to back.
5. Insert bobbin: Open bobbin case, insert bobbin with thread unwinding counterclockwise.
6. Pull bobbin thread up through needle plate slot.

CAUTION! Always thread with presser foot raised to ensure proper tension.

Specifications

• Model: Singer 348.
• Stitch Type: Straight stitch only.
• Stitch Length: Adjustable 0–4 mm.
• Maximum Speed: Up to 1100 stitches per minute.
• Needle System: 15x1 (HAx1) household needles.
• Bobbin Type: Class 15 metal bobbins.
• Presser Feet: Includes general purpose, zipper, buttonhole feet.
• Power Requirements: 120V AC, 60Hz, 0.7A.
• Weight: Approximately 22 lbs (10 kg).
• Warranty: Limited 25-year warranty on head, 5 years on electrical.

Controls and Functions

Access controls on front and side of machine. Front Panel: Stitch length dial, Reverse lever, Light switch.

Side/Underneath: Handwheel, Bobbin winder stop, Tension dial, Foot pedal jack, Power switch.

Stitch Length: Turn dial to set desired length (higher number = longer stitch). Reverse: Hold lever to stitch backwards for seam locking. Tension: Adjust dial for balanced stitches; higher number increases tension. Bobbin Winder: Push bobbin to right to engage; disengages automatically when full.

Basic Sewing Operations

Practice on scrap fabric first.

1. Turn on power switch and light.
2. Place fabric under presser foot, lower foot using lifter.
3. Gently press foot pedal to start sewing; control speed with pedal pressure.
4. Guide fabric gently; do not push or pull.
5. At end of seam, hold reverse lever to backstitch 2–3 stitches.
6. Raise needle, lift presser foot, remove fabric, and trim threads.

Tip: Always start with needle in highest position to prevent thread jams.

Maintenance and Cleaning

Regular cleaning ensures optimal performance.

1. Unplug machine before any maintenance.
2. Remove needle plate screws; lift plate to access bobbin area.
3. Use small brush to remove lint and dust from feed dogs, bobbin case, and hook race.
4. Wipe exterior with soft, dry cloth.
5. Oil moving parts per lubrication diagram (use only Singer sewing machine oil).

WARNING! Do not use compressed air; it can force lint deeper. Never oil plastic parts.

Needle and Bobbin Replacement

Replace needle regularly (every 8–10 hours of sewing).

1. Needle: Loosen clamp screw, remove old needle. Insert new needle flat side to back; tighten firmly.
2. Bobbin: Wind new bobbin following threading guide. Insert into case with thread unwinding counterclockwise.

CAUTION! Always use correct needle type (15x1). Bent or dull needles can cause skipped stitches or damage.

Storage and Care

Store in a dry, dust-free location. Cover machine when not in use.

CAUTION! Avoid extreme temperatures and humidity. Always unplug before storing.

Warranty Information

Singer Limited Warranty: 25 years on sewing machine head, 5 years on electrical components, 1 year on light bulb. Proof of purchase required. For service, contact authorized Singer service center. For support, visit www.singer.com or call 1-800-4-SINGER.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Machine does not run	Power connection	Check power cord; ensure outlet works; turn on power switch.
Thread breaks	Tension/thread quality	Rethread completely; adjust tension; use good quality thread.
Skipped stitches	Needle/bobbin	Replace needle; ensure correct insertion; check bobbin threading.
Uneven stitches	Tension imbalance	Adjust upper tension; check bobbin case for lint.
Fabric not feeding	Presser foot/feed dogs	Lower presser foot; clean feed dogs; check stitch length setting.
Noisy operation	Lint/lack of oil	Clean and oil machine; check for loose parts.
Bobbin thread bunches	Bobbin threading	Rethread bobbin; ensure correct direction in case.

Reset: Unplug for 5 minutes if electrical issues occur.

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