Best Coverstitch Machines: Is a Dedicated Hemmer Worth Buying?

The best coverstitch machine for most sewists is a dedicated model with a free arm, differential feed and adjustable stitch width, built to hem knit fabrics cleanly. If you sew stretchy garments often, a coverstitch gives professional-looking hems that a regular machine’s twin needle cannot match. Here is how to choose between standalone and combination machines.

What a Coverstitch Machine Does

A coverstitch creates two or three parallel rows of straight stitching on top and a looper thread zigzag underneath. The result is a stretchy, professional hem like those on store-bought t-shirts and leggings. It can also be used for decorative topstitching, attaching bindings and creating a chain stitch. Unlike a serger, a coverstitch does not trim fabric while sewing, so you need to prepare edges first or pair it with a serger.

Many people add a coverstitch after they already own a serger and a regular sewing machine, because the stretch-friendly hem is a common finishing step.

Standalone, Combo and Convertible Machines

Dedicated machines are often simpler and more reliable for frequent hemming. Combination machines save space but require adjusting plates, loopers and settings whenever you switch functions. Choose according to how often you will use each mode.

Features That Matter

Differential feed lets you adjust how fast fabric moves under the needle, preventing wavy hems on knits. Adjustable stitch length and width give flexibility for different fabrics and decorative effects. A free arm helps you sew cuffs and sleeves. Look for easy threading, such as color-coded guides, since coverstitch machines use several threads and can be intimidating. A built-in light, a lift lever that raises the presser foot high and an accessible tension dial make daily use smoother.

• Three-needle capability adds a wider coverstitch option.
• Chain stitch and wide coverstitch modes expand decorative choices.
• Presser foot pressure adjustment helps with thick or slippery fabrics.
• A sturdy metal frame reduces vibration at high speed.

Needles, Thread and Fabrics

Use needles recommended in the manual, typically ELx705 types, and replace them regularly. Dull or bent needles cause skipped stitches. Cone thread suits these machines because they use a lot of thread, but make sure it is of good quality; weak thread breaks under tension. Test on scrap pieces of your actual fabric before hemming a finished garment. Jersey, rib knit, fleece and athletic fabrics all behave differently, so adjust tension and differential feed as needed.

A basic supply of coverstitch machine needles and a few polyester serger thread cones keeps you ready to sew without interruption.

Learning Curve and Troubleshooting

The first few hems may look uneven, which is normal. Common issues include skipped stitches, loose bottom loopers and wavy hems. Rethreading carefully, changing needles, checking tension settings and adjusting presser foot pressure solves most problems. Mark hem lines with a fabric marker or use hem guides, and use clips instead of pins when possible to avoid damaging needles. Take time to learn how to finish the end of a hem, for instance by overlapping stitches or pulling threads to the inside.

Many brands provide video tutorials, and sewing communities are full of tips. If you buy used, test thoroughly and confirm that parts and service are available. Look at coverstitch machines by checking feature lists, included feet and warranties.

Budget and Accessories

Entry-level machines are enough for hemming t-shirts and basic knit projects. Higher-end machines add smoother feed, air threading and more stitch options. Consider accessories such as binding attachments, hemmer feet and elastic guides, which can simplify tasks. Tables or sewing cabinets give the machine a stable surface and help reduce vibration. Make sure you have space and an outlet near your workspace.

Finally, think about your long-term sewing plans. If you only sew woven fabrics, you may not need a coverstitch. If you plan to make activewear, baby clothes or tees, it is likely worth the investment.

Plan your workflow. Most sewists cut and construct garments, serge seams, press and then hem with the coverstitch at the end. Always practice on a leftover scrap of the exact fabric and test stretch by pulling the hem; if the thread snaps, loosen the needle tension or lengthen the stitch. Starting with stable ribbing or sweatshirt fleece builds confidence before attempting slippery athletic knits.

Maintenance is simple but important. Brush out lint from the looper area after every project, oil moving parts as directed in the manual and cover the machine when not in use. Schedule an annual service if you sew frequently. A tidy, well-lit workspace makes threading less frustrating and reduces mistakes.

If space is tight, remember that a coverstitch is roughly the size of a serger and needs room around it for thread cones and fabric feed. Measure your table, and consider a dedicated rolling cart so the machine can be tucked away. Good lighting over the needle area saves your eyes during long sessions.

Frequently Asked Questions

Do I need a serger to use a coverstitch?

No, but the two machines complement each other. A serger finishes edges, and a coverstitch hems knits.

Can a coverstitch sew woven fabric?

Yes for decorative topstitching and hems, but the stretch benefit is mainly for knits.

Is a twin needle a good alternative?

It can work for occasional use, but results are less stretchy and durable than a true coverstitch.