singer sewing machine model 66 manual

The Singer Model 66 is a classic, heavy-duty straight-stitch sewing machine, often referred to as a "Red Eye" or "Sphinx" model. Introduced in the early 1900s, it features a vibrating shuttle bobbin system, reverse stitching capability, and a powerful motor. This manual covers its key features, setup, threading, operation, maintenance, and troubleshooting for both electric and treadle versions.

Features at a Glance

Key components: Cast-iron body with ornate decals, vibrating shuttle, tension assembly, stitch length regulator, reverse lever, and built-in bobbin winder.

Unpacking and Setup

If removed from cabinet, securely mount machine to its base or cabinet.

1. Electric Models: Connect motor belt to handwheel. Plug power cord into grounded outlet.
2. Treadle Models: Ensure belt connects handwheel to treadle flywheel. Check treadle action is smooth.
3. Level the Machine: Use shims under cabinet legs if necessary to prevent rocking.
4. Install Needle: Loosen needle clamp screw, insert needle with flat side to the rear, tighten securely.

WARNING! Machine is extremely heavy. Use proper lifting technique or two people. Ensure power is off during setup.

First-Time Operation

Before sewing, thread the machine and bobbin correctly.

1. Wind the Bobbin: Place spool on bobbin winder, thread through tension guide, and engage winder against handwheel.
2. Thread the Upper Thread: Follow numbered guides on machine from spool pin to needle.
3. Insert Bobbin: Open shuttle race, drop in bobbin with thread pulling counter-clockwise.
4. Draw Up Bobbin Thread: Hold upper thread, turn handwheel toward you to bring bobbin thread up through needle plate.
5. Test Stitch: Place fabric under presser foot, lower foot, and make a few stitches on scrap fabric.

CAUTION! Always turn handwheel TOWARD YOU (counter-clockwise) only. Never sew without fabric under the needle.

Specifications

• Model: Singer 66 (Various sub-models: 66-1, 66-4, etc.)
• Manufacture Dates: Approximately 1905 - 1950s
• Stitch: Straight stitch, adjustable length.
• Speed: Up to 1,100 stitches per minute (electric).
• Bobbin: Class 66 metal vibrating shuttle.
• Needle: 15x1 (HAx1), size 11-18.
• Presser Feet: Low shank attachment system.
• Weight: Approximately 30 lbs (machine head only).
• Power: 110V AC motor (later models) or treadle drive.

Controls and Adjustments

Primary controls are located on the right side and front of the machine.

Stitch Length Regulator: Dial with numbers (higher number = longer stitch). Set between 8-12 for general sewing.
Reverse Lever: Push to the left to sew in reverse for locking stitches.
Tension Dial: Upper thread tension. Higher number = tighter tension. Balance with bobbin tension.
Presser Foot Pressure Screw: On top of machine above needle bar. Adjust for heavy or light fabrics.
Drop Feed Lever: Lowers feed dogs for darning or free-motion work.
Bobbin Winder Friction Disc: Engages to stop needle bar while winding bobbin.

Threading the Machine

Correct threading is critical for proper operation.

1. Raise presser foot to release tension discs.
2. Place thread spool on spool pin.
3. Follow the threading path: Through first thread guide, down and around tension assembly, up through take-up lever, down through lower guides, and finally through the needle eye from front to back.
4. Bobbin Threading: Wind bobbin evenly. Insert into shuttle so thread unwinds counter-clockwise when pulled.

Tip: Always thread the needle with the presser foot raised. Pull thread under the presser foot toward the rear after threading.

Basic Sewing Techniques

Mastering straight stitch sewing.

1. Starting: Place fabric under needle, lower presser foot. Hold both thread tails to the rear. Turn handwheel to sink needle, then start motor or treadle.
2. Guiding Fabric: Guide fabric gently; do not push or pull. Let feed dogs move it.
3. Turning Corners: Stop with needle down in fabric. Raise presser foot, pivot fabric, lower foot, continue sewing.
4. Finishing: Sew a few reverse stitches to lock seam. Raise needle to highest position, raise presser foot, pull fabric to rear and cut threads.
5. Adjusting Stitch Length: Use regulator for basting (long stitch) or fine seams (short stitch).

WARNING! Keep fingers away from moving needle. Always watch the sewing area, not the needle.

Maintenance & Oiling

Regular oiling is essential for smooth operation and longevity.

Use only high-quality sewing machine oil. Apply 1-2 drops to each oiling point as indicated in the machine's diagram (e.g., needle bar, presser foot bar, shuttle race, bobbin winder).
Wipe away excess oil. Run the machine without thread on a scrap fabric to distribute oil.
Clean lint and thread bits from shuttle race, tension discs, and feed dogs regularly with a small brush.
For treadle models, oil the treadle joints and pitman rod connection.

CAUTION! Unplug electric models before oiling. Never use household oils or WD-40.

Accessories and Attachments

Uses standard low shank attachments. Common original accessories included:

• Various presser feet (zipper, hemmer, buttonhole, ruffler).
• Seam guide that attaches to needle plate.
• Original screwdriver, oil can, and spare bobbins.
• Instruction manual and attachment guide.

Attachments are engaged by lowering the presser foot lever, which clamps them onto the shank.

Regulatory & History

The Singer Model 66 was manufactured by the Singer Manufacturing Company, one of the most produced sewing machine models in history. It is not subject to modern electrical regulations. This machine is a testament to early 20th-century industrial design and durability. Many parts are still available from specialty suppliers. For historical information or sourcing parts, consult the Singer Company archives or dedicated vintage sewing machine forums.

Troubleshooting

Important: For persistent mechanical issues, consult a professional technician familiar with vintage Singer machines.

Resources: Online forums, ISMACS (International Sewing Machine Collectors' Society), and vintage sewing machine dealers.