Singer 6700C Review: Fast Computerized Control With Heavy-Duty Limits

The Singer Heavy Duty 6700C pairs 411 stitch applications, lettering, seven one-step buttonholes, a speed slider, and a 1,100-stitch-per-minute ceiling with a metal frame. Positive owners value speed and easy controls; skipped stitches, jams, low-speed pedal behavior, and durability complaints set the boundary.

Heavy-duty branding needs a fabric ladder

Singer publishes an enhanced motor, metal frame, stainless bedplate, adjustable foot pressure, and high speed. Those features make the 6700C a more assertive domestic machine than a tiny entry model. They do not specify presser-foot clearance, compound feed, or an industrial duty cycle.

The supplied reviews include success on rope bowls, vinyl, and ordinary garments, but also complaints about four-layer jobs, skipped stitches, and stalled or damaged units. Move from woven cotton to denim layers and then to the exact project seam. Use the correct needle and stop when feeding becomes the problem.

Use the speed slider as a control, not a marketing number

A 1,100-spm ceiling matters on long seams, but beginners usually benefit more from a reliable low ceiling. The 6700C slider can restrict the machine before the pedal or start/stop button is used. That makes topstitching, curves, and dense stitch beginnings more manageable.

Some owners still dislike the pedal’s very-low-speed response. Test a slow five-stitch start with the slider reduced, then repeat with start/stop. The machine is only beginner-friendly if the control method fits the user’s coordination.

1. Set the slider below halfway
2. Start on two layers of stable cotton
3. Stop with the needle down at a marked point
4. Repeat with a seam hump and listen for a change in sound

The stitch library is broad without becoming the 9960

The 6700C offers 411 applications, one lettering font, and seven buttonhole styles. It covers substantially more decorative and construction work than a mechanical heavy-duty model, while keeping selection on direct buttons and an LCD.

That middle position is useful for garments and crafts. A sewer seeking a huge alphabet and decorative library should compare the 9960 or 9985; someone sewing mostly straight seams may prefer fewer electronics and a simpler mechanical model.

The return-period audit is not optional

Negative owner reports mention thread nesting, skipped stitches, timing trouble, feed-dog problems, and failures that surfaced early. These reports do not establish a failure rate, but they identify the exact systems to test.

Run the same seam repeatedly at low, medium, and high speed. Make every buttonhole style you realistically need, wind and insert multiple bobbins, use reverse, and cross a realistic seam hump. Keep the machine only when the result is repeatable.