Singer 66 Sewing Machine Manual

The Singer 66 is a classic vintage sewing machine known for its durability and reliability. This treadle-operated machine features a vibrating shuttle mechanism, reverse stitching capability, and various stitch length adjustments. Below are key sections covering operation, maintenance, troubleshooting, and specifications for this timeless sewing companion.

1. Features at a Glance 2. Machine Setup 3. First-Time Operation 4. Specifications 5. Controls and Adjustments 6. Threading Instructions 7. Stitch Settings 8. Maintenance & Oil Points 9. Care & Cleaning 10. Accessories 11. Troubleshooting

Features at a Glance

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

Feature	Description
Treadle operation	Foot-powered mechanism for smooth stitching
Vibrating shuttle	Classic bobbin system for reliable thread delivery
Stitch length regulator	Adjustable from 6-20 stitches per inch
Reverse stitching	Built-in reverse for securing stitches
Tension dial	Precise upper thread tension control
Presser foot pressure	Adjustable for different fabric thicknesses
Bobbin winder	Integrated bobbin winding mechanism
Needle clamp	Standard 15x1 needle system
Throat plate	Removable for bobbin access and cleaning
Decorative stitching	Capability for basic decorative patterns

Machine Setup

Assemble and position your Singer 66 on a stable surface.

Place machine on treadle cabinet: Ensure machine fits securely in cabinet cutout.
Connect treadle belt: Attach leather belt from treadle wheel to machine handwheel.
Level the machine: Adjust cabinet legs for stable operation.
Oil all points: Apply sewing machine oil to designated oil points before first use.

WARNING! Machine is heavy; use proper lifting technique. Ensure cabinet is stable before operation.

First-Time Operation

Prepare machine for sewing; follow step-by-step instructions.

Thread the machine: Follow threading diagram from spool to needle.
Wind bobbin: Use integrated bobbin winder with empty bobbin.
Insert bobbin: Place bobbin in shuttle following directional arrows.
Test stitching: Use scrap fabric to adjust tension and stitch length.
Practice treadling: Develop smooth, consistent foot motion.

CAUTION! Keep fingers away from needle area during operation. Always turn handwheel toward you.

Specifications

Machine Type: Treadle-operated vibrating shuttle
Stitch Length: 6-20 stitches per inch
Needle System: 15x1 standard domestic needles
Bobbin Type: Class 66 vibrating shuttle bobbins
Presser Feet: Low shank attachment system
Throat Space: Standard vintage throat space
Weight: Approximately 30 pounds (machine only)
Manufacture Dates: 1900s-1950s vintage models
Power Source: Treadle foot power
Reverse Stitching: Yes, built-in reverse lever

Controls and Adjustments

Main controls located on machine head: Stitch length regulator, tension dial, reverse lever, presser foot lifter.

Stitch Length: Turn regulator for 6-20 stitches per inch. Tension: Adjust dial for balanced stitches. Reverse: Engage lever for backstitching. Presser Foot: Use lever to raise/lower foot.

Thread Guide: Follow numbered path from spool pin to needle. Bobbin Case: Remove shuttle for bobbin access. Needle Bar: Loosen screw for needle replacement.

Threading Instructions

Upper Threading: Follow numbered guide from spool pin through tension discs to needle.

Place thread on spool pin.
Pull thread through first thread guide.
Pass between tension discs.
Thread through take-up lever.
Follow remaining guides to needle.
Thread needle from front to back.

Bobbin Threading: Wind bobbin using integrated winder. Insert in shuttle following directional arrows.

Stitch Settings

Adjust stitch length and tension for different fabrics.

Standard Stitching: 10-12 stitches per inch for medium fabrics.
Fine Fabrics: 15-20 stitches per inch with lighter tension.
Heavy Fabrics: 6-8 stitches per inch with increased tension.
Reverse Stitching: Engage reverse lever to secure seam ends.
Decorative Stitching: Use stitch length variations for pattern effects.

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

Maintenance & Oil Points

Regular oiling maintains smooth operation. Use only sewing machine oil.

Oil points: Needle bar, presser bar, treadle joints, shuttle race.
Frequency: Oil every 8-10 hours of use.
Method: Apply small drops to each oil point.
Wipe excess: Clean off any excess oil after application.
Treadle maintenance: Check belt tension and lubricate moving parts.

WARNING! Use only sewing machine oil. Never use household oils.

Care & Cleaning

Keep machine clean for optimal performance.

Remove lint buildup from shuttle area and feed dogs. Wipe exterior with soft cloth. Store in dry location away from moisture.

CAUTION! Do not use compressed air; it can force lint into mechanisms. Unplug (if electric) before cleaning.

Accessories

Standard accessories included with original purchase.

Various presser feet: Zigzag, zipper, buttonhole
Additional bobbins: Class 66 shuttle bobbins
Needles: Assorted 15x1 needles
Screwdrivers: For adjustments and maintenance
Oil can: For regular lubrication
Instruction manual: Original Singer documentation

Troubleshooting

Symptom	Possible Cause	Corrective Action
Thread breaking	Incorrect threading/tension	Rethread completely; adjust tension; check for burrs.
Skipped stitches	Needle/dirty machine	Replace needle; clean shuttle area; check needle insertion.
Uneven stitches	Tension imbalance	Adjust upper and bobbin tension; rethread bobbin.
Machine hard to turn	Lack of oil/lint	Oil all points; clean shuttle race; check for thread jams.
Fabric not feeding	Presser foot pressure	Adjust presser foot pressure; clean feed dogs.
Noisy operation	Need for oiling	Oil all moving parts; check for loose components.

Professional Service: Contact authorized Singer service center for major repairs.

Support: Visit Singer website or contact customer service for vintage machine support.