Singer Sewing Machine Model 15 Manual

The Singer Model 15 is a classic straight-stitch sewing machine manufactured from the early 1900s through the 1950s. This durable machine features a vibrating shuttle mechanism, reverse stitching capability, and compatibility with standard 15x1 needles and Class 15 bobbins. Below are key sections covering operation, maintenance, troubleshooting, and technical specifications.

Features at a Glance

Key components: Cast iron body, vibrating shuttle mechanism, tension dial, stitch length regulator, reverse lever, bobbin winder.

Machine Setup

Unpack and inspect all components. Place on stable surface at comfortable working height.

1. Position machine: Ensure stable placement on table or cabinet.
2. Install needle: Loosen needle clamp screw, insert needle with flat side to back, tighten securely.
3. Power connection: For electric models, plug into appropriate power outlet.
4. Oil points: Apply sewing machine oil to designated points before first use.

WARNING! Machine is heavy; lift with care using both hands. Keep fingers away from needle during operation.

Threading Instructions

Proper threading is essential for smooth operation and quality stitches.

1. Upper threading: From spool pin, through tension discs, take-up lever, and finally through needle eye from front to back.
2. Bobbin threading: Wind bobbin evenly, insert into shuttle with thread following groove direction.
3. Bring up bobbin thread: Hold upper thread, turn handwheel toward you to catch bobbin thread and pull up through throat plate.
4. Tension check: Test on fabric scrap; adjust tension dial if needed.

CAUTION! Always raise needle to highest position before threading. Ensure presser foot is raised when threading upper tension.

Technical Specifications

• Machine Type: Straight stitch vibrating shuttle
• Manufacture Years: 1900s-1950s
• Stitch Length: Adjustable 0-4mm
• Needle Position: Center needle position
• Presser Foot Lift: Standard height adjustment
• Bobbin Capacity: Standard Class 15 metal bobbin
• Weight: Approximately 30 lbs (13.6 kg)
• Dimensions: Varies by cabinet model
• Power Options: Hand crank, treadle, or electric motor

Controls and Adjustments

Main controls located on machine body for easy access during sewing.

Stitch Length Regulator: Located on bed; turn to adjust stitch length (higher numbers = longer stitches).

Tension Dial: Front-mounted dial; higher numbers increase tension for heavier fabrics.

Reverse Lever: Engage for back-tacking at beginning and end of seams.

Presser Foot Pressure: Adjustable via screw on presser foot bar (not all models).

Basic Stitching

Follow these steps for proper sewing technique.

1. Prepare fabric: Place under presser foot with raw edges aligned.
2. Lower presser foot: Use lever on back of machine.
3. Start sewing: Turn handwheel toward you to begin, then use power source to continue.
4. Guide fabric: Keep hands on either side of presser foot, gently guiding fabric through.
5. Reverse stitching: Engage reverse lever at beginning and end of seams for reinforcement.
6. Finish: Raise needle to highest position, lift presser foot, and remove fabric.

Tip: Practice on scrap fabric to master stitch length and tension settings.

Maintenance & Oil Guide

Regular maintenance ensures optimal performance and longevity.

1. Daily oiling: Apply 1-2 drops of sewing machine oil to designated points after each use.
2. Weekly cleaning: Remove lint and dust from bobbin area and feed dogs.
3. Monthly inspection: Check for worn parts, loose screws, and proper alignment.
4. Annual service: Professional cleaning and adjustment recommended for heavy use.

WARNING! Use only high-quality sewing machine oil. Never use household oils or lubricants.

Needle & Bobbin Replacement

Proper needle and bobbin maintenance prevents stitching problems.

Needle Replacement: Use only 15x1 needles. Replace every 8-10 hours of sewing or when damaged.

Bobbin Winding: Ensure even winding without overfilling. Thread should not extend beyond bobbin flange.

Shuttle Removal: Open shuttle race cover, remove shuttle for cleaning and bobbin replacement.

Cleaning Procedures

Unplug electric models before cleaning. Use soft brush and lint-free cloth only.

CAUTION! Do not use compressed air or liquid cleaners. Keep machine dry and free from dust accumulation.

Warranty Information

Original Singer warranty no longer applicable due to age. Machine valued for durability and repairability. Replacement parts available through authorized Singer dealers and vintage sewing machine specialists. For technical support, contact local sewing machine repair shops specializing in vintage models.

Troubleshooting

Reset: Complete re-threading of both upper and lower threads often resolves most issues.

Service: Contact local vintage sewing machine repair specialist for mechanical issues.