The catch
Singer Heavy Duty 6700C
Tie-off locks the stitches in place without cutting the threads, so you still finish with the manual cutter or scissors.
Side by side
Singer 6700C vs 6800C: 6800C takes care of repeated thread trimming, and quilting space doesn't grow
Quick verdict
If you often finish separate small pieces and want a button that ties off and cuts both threads, the 6800C is the choice. The 6700C suits you when manual trimming is acceptable and what you mainly need is hand start/stop, speed control and adjustable fabric pressure, all of which both provide. The 6800C adds a second lettering font, but neither has a larger quilting opening or hoop embroidery capability.
Before you buy
Why, and what it costs you
Count how many separate finishes you do and ignore how many minutes you sew
Say you are a parent mending a handful of cuffs, loose seams and fabric accessories. You stop, secure and take out a piece over and over. The 6800C folds tie-off and cutting into one control, so it pays off each time a piece is done. Someone sewing a few long curtain seams might sit at the machine longer and still use that feature far less. So the type of work is a better test of whether to upgrade than how long you sew. Both machines already have a tie-off control, so the gain is cutting the threads. Securing a seam was already possible. For delicate or unusual techniques, finish them the way their instructions say.
Where this comes from
Tie-off and automatic cutting are treated as separate things in the two manuals. The reasoning sets repeated seam endings against long continuous seams. It puts no figure on time saved and does not promise that every technique ends the same way.
The catch
Singer Heavy Duty 6800C
The 6.4-inch needle-to-arm space stays the same with automatic cutting, and the standard kit comes with no extension table.
Singer Heavy Duty 6700C
- Why pick it
- Longer seams are most of what you sew, and trimming thread ends yourself is fine with you.
- You want hand start/stop and adjustable pressure, and you do not need to pick the higher model just for those shared controls.
- The catch
- Tie-off locks the stitches in place without cutting the threads, so you still finish with the manual cutter or scissors.
Singer Heavy Duty 6800C
- Why pick it
- Many separate repairs or small pieces fill your sessions, which makes repeated manual thread trimming a real nuisance.
- Two built-in lettering styles appeal to you, and you know the letters are only about 7 mm high.
- The catch
- The 6.4-inch needle-to-arm space stays the same with automatic cutting, and the standard kit comes with no extension table.
We may earn a commission from qualifying Amazon purchases. How we make money
What this page compares
Singer 6700C or 6800C for repeated repairs, school labels and bulky quilts? See what the automatic cutter changes and what the upgrade leaves as it was.
These computerized Heavy Duty machines are close alternatives. The question that matters for an upgrade is whether automatic finishing takes a repeated chore off your hands, not whether the bigger stitch-application number sounds more capable.
Which one fits
Pick the situations that sound like you
Lots of separate repairs squeezed into a short evening session
Automatic cutting takes away a finishing step you would repeat, though no measured time saving is claimed.
- Singer Heavy Duty 6700C
- Similar
- Singer Heavy Duty 6800C
- Better fit
Long seams, and you do not mind trimming by hand
The 6700C already has the shared hand controls and pressure adjustment. Look at the actual prices.
- Singer Heavy Duty 6700C
- Better fit
- Singer Heavy Duty 6800C
- Similar
A bigger opening to fit a rolled quilt
Both are documented with the same 6.4-inch throat.
- Singer Heavy Duty 6700C
- Caution
- Singer Heavy Duty 6800C
- Caution
Sports logos you import, or large embroidery
Small built-in letters do not count as hoop embroidery.
- Singer Heavy Duty 6700C
- Caution
- Singer Heavy Duty 6800C
- Caution
In practice
Differences you will notice
Count how many separate finishes you do and ignore how many minutes you sew
Say you are a parent mending a handful of cuffs, loose seams and fabric accessories. You stop, secure and take out a piece over and over. The 6800C folds tie-off and cutting into one control, so it pays off each time a piece is done. Someone sewing a few long curtain seams might sit at the machine longer and still use that feature far less. So the type of work is a better test of whether to upgrade than how long you sew. Both machines already have a tie-off control, so the gain is cutting the threads. Securing a seam was already possible. For delicate or unusual techniques, finish them the way their instructions say.
How we worked this out
Tie-off and automatic cutting are treated as separate things in the two manuals. The reasoning sets repeated seam endings against long continuous seams. It puts no figure on time saved and does not promise that every technique ends the same way.
Moving up a model does not fix a cramped quilting setup
When what bugs you is fighting with the rolled-up part of a quilt next to the needle, look at your workspace first. The 6800C's higher number will not fix it. The opening is the same 6.4-inch on both, and each standard kit comes with a walking foot. A suitable extension table can hold fabric outside the machine, but it will not make that opening wider. For smaller pieces on a shared dining table, the 6700C keeps those basic sewing controls. Pick the 6800C if its cutter suits your work. The upgrade only looks like a bigger quilting machine.
How we worked this out
The exact US pages for both give 6.4 by 4.6 inches of sewing space and list the walking foot. An extension table is not in either standard kit. How much support area you have and how much room sits between needle and arm are separate geometric limits.
Buying for simple name labels is not the same as buying for team logos
Both machines have built-in lettering for small sewn names on a fabric label. The 6800C adds a second style, which can be worth it if looks matter to you as part of the hobby. Should the family be after big sports initials, a badge or an imported club logo, do not mistake either listing for a hoop embroidery machine. On both, the letters are about 7 mm high. Look at the real sample alphabet before you pay for the extra font, and try out the fabric, thread and stabilizer. Two styles change the look of a name. They do not change how big a job the machine can take on.
How we worked this out
According to the US specifications, the machines list one font against two, with about the same letter height. These sewing models have no documented capability for editing imported designs or using a hoop. Whether a particular label works is still something to test on the fabric.
Option A
Singer, Heavy Duty 6700C
Heavy Duty 6700C
Longer seams are most of what you sew, and trimming thread ends yourself is fine with you.
- Best for
- Longer seams are most of what you sew, and trimming thread ends yourself is fine with you.
Facts we checked
- Finishing each piece: Tie-off button, then manual thread cutting
- Foot-pedal alternative: Hand start/stop and speed slider
- Fabric-pressure adjustment: Adjustable presser-foot pressure
- Space beside the needle: 6.4 inches, with 4.6-inch height
Option B
Singer, HD6800C
Heavy Duty 6800C
Many separate repairs or small pieces fill your sessions, which makes repeated manual thread trimming a real nuisance.
- Best for
- Many separate repairs or small pieces fill your sessions, which makes repeated manual thread trimming a real nuisance.
Facts we checked
- Finishing each piece: Button ties off and cuts both threads
- Foot-pedal alternative: Hand start/stop and speed slider
- Fabric-pressure adjustment: Adjustable presser-foot pressure
- Space beside the needle: 6.4 inches, with 4.6-inch height
Spec by spec
Where they really differ
| Spec | Singer Heavy Duty 6700C | Singer Heavy Duty 6800C | In practice |
|---|---|---|---|
| Finishing each piece | Tie-off button, then manual thread cutting | Button ties off and cuts both threads | The gap shows up at every separate finish and not along the length of a long seam. |
| Foot-pedal alternative | Hand start/stop and speed slider | Hand start/stop and speed slider | You do not need the 6800C simply to sew ordinary seams without the pedal. |
| Fabric-pressure adjustment | Adjustable presser-foot pressure | Adjustable presser-foot pressure | Either machine lets you make this adjustment if the fabric needs it. |
| Space beside the needle | 6.4 inches, with 4.6-inch height | 6.4 inches, with 4.6-inch height | Stepping up a model gives a rolled quilt no extra room. |
| Built-in letters | One font, about 7 mm high | Two fonts, about 7 mm high | Settle on a font style only after you have confirmed that small stitched lettering does the job. |
| Base accessory kit | Walking foot included, table not included | Walking foot included, table not included | Do not pay for an assumed table in the kit or a walking foot you think is exclusive. |
Trade-offs
What each pick costs you
With Singer Heavy Duty 6700C
- One font of lettering handles simple names. It is no way to bring in a school logo or a large design.
With Singer Heavy Duty 6800C
- Choosing a second font is about looks. The lettering does not get bigger, and stitch quality is not shown to improve.
Change of plan
When the answer changes
Trimming thread again and again is why small repairs keep getting put off
Go with Singer Heavy Duty 6800C. The 6800C cuts both threads automatically, and the sewing area does not change.
Shared controls handle your work and you are fine finishing by hand
Go with Singer Heavy Duty 6700C. Weigh the current 6700C offer against the cutter and extra lettering style before you pay.
You need a much bigger throat for quilting
Neither model fits. Workspace gives the higher model no edge here.
Decision guide
Before you buy
You want sessions that are less fiddly, but paying for the higher model only pays off if it removes the work you repeat.
What this page can’t tell you
- The page names no winner on speed, power, noise, durability or stitch quality.
- Stitch applications in marketing copy do not count independent stitches.
- Upgrade recommendations leave out conflicting sequence-mode wording.
By the numbers
What the data shows
What we found across the sewing machines we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Singer Heavy Duty 6700C |
|
|
|
| Singer Heavy Duty 6800C |
|
|
|
Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Singer Heavy Duty 6700C
Longer seams are most of what you sew, and trimming thread ends yourself is fine with you.
You want hand start/stop and adjustable pressure, and you do not need to pick the higher model just for those shared controls.
See price & reviews on AmazonSinger Heavy Duty 6800C
Many separate repairs or small pieces fill your sessions, which makes repeated manual thread trimming a real nuisance.
Two built-in lettering styles appeal to you, and you know the letters are only about 7 mm high.
See price & reviews on AmazonEach link opens in a new tab.
We may earn a commission from qualifying Amazon purchases. How we make money