If you're reading this, chances are you've invested in an overlock machine-whether you own a small apparel workshop, run a home-based alteration business, or manage a mid-sized garment production line. Overlockers are workhorses: they trim fabric edges while stitching, creating durable, professional seams that stop fraying in its tracks. But even the sturdiest overlock machine won't last (or perform as well) if you store it incorrectly, especially when it's not in use for days, weeks, or even longer.
As an overlock machine supplier, I've seen first-hand how a few small storage missteps turn a $1,500 workhorse into a $1,500 paperweight within a year. I've talked to dozens of clients who assumed "storing it in the corner of the workshop" was enough-only to pull it out months later to find rusted needles, tangled thread, gunked-up tension dials, or even warped plastic parts. Today, I'm breaking down exactly how to store your overlock machine properly, based on years of repairing customer returns and advising small business owners like you.
First: Know Your Machine's Design (Not All Overlockers Are the Same)
Before we dive into storage best practices, let's get one thing straight: not all overlock machines operate the same way. The storage rules for a basic home-use 2-thread overlock are different from industrial-grade models built for 24/7 production. That said, the core principles apply to every overlocker, no matter the thread count or needle setup.
If you're in the market for a new unit, understanding these variations can also help you pick a machine that's easier to maintain long-term. Let's quickly cover the most common types:
- The 4 Thread Industrial Overlocker is the workhorse of large apparel lines-used for seaming, trimming, and overcasting at high speeds. It has two needles and two loopers, so its more moving parts require extra careful storage.
- For smaller workshops or those working with lightweight fabrics, a 2 Needle 3 Thread Overlock Sewing Machine is ideal. It's simpler, with fewer parts, but that doesn't mean it's immune to storage damage.
- A Double Needle 4 Thread Overlock Machine is great for projects that need consistent, strong seams (like denim or activewear). Its dual needles mean more points where rust or friction can cause problems.
- A 2 Needle 4 Thread Overlock Machine is another popular choice for versatility, handling everything from fine knits to heavy wovens.
- And if you're working with decorative seams or stretch fabrics, a 5 Thread Industrial Overlocker adds an extra looper for extra stretch-again, with more components that need protection.
No matter which model you own, the key to proper storage is addressing the two biggest threats to overlockers: dust and humidity. Those tiny workshop particles? They get into every crevice, clogging tension discs and jamming loopers. Humidity? It's the #1 cause of rust on metal needles, feed dogs, and gears-damage that can't be fixed with a quick oil.
Step 1: Prep the Machine Before You Even Think About Putting It Away
Storage starts long before you unplug your overlock and tuck it into a corner. Skipping this prep step is like leaving your car with a full tank of gas and the windows down-you're setting it up for trouble. Here's exactly what to do when your last project is done for the season (or even just for a few days):
First, cut the power. Unplug the machine from the wall-don't just turn the switch off. Even small standby power can attract dust through the vents, and if a stray thread falls into the motor, it could start to fray or catch. Next, snip all thread tails down to 1 inch. Leaving long thread ends is a recipe for tangled messes: threads can catch on the looper, dry out, and become brittle, or even attract dust like a magnet.
Once the threads are cut, remove the needle and presser foot. Needles are sharp, but more importantly, they're hollow and collect lint inside. Leaving a needle in place while storing can also bend it if the machine is shifted, and bent needles throw off the entire stitch quality when you go to use it again. Store the needle in a small, labeled plastic bag (I keep a jar of used and new needles in my workshop-labeling them by size and type saves so much time later). The presser foot? Wipe it down with a dry microfiber cloth to remove any fabric lint or thread, then set it aside in a safe spot so you don't lose it.
Now, the most important prep step: clean the throat plate, loopers, and tension discs. I see so many clients skip this, and it's the number one cause of performance issues after storage. Take a small, stiff-bristled brush (a toothbrush works great, but I sell specialized overlock brushes for this exact task) and gently brush lint and dust from the throat plate. Then, carefully remove the looper cover (check your machine's manual-most have a quick-release latch) and brush any lint from the loopers. For tension discs, don't use liquid cleaner unless your manual says it's safe; a dry cloth or the corner of a cardstock sheet (like a business card) works to wipe away built-up thread gunk.
Step 2: Choose the Right Storage Location (Not Just Any Corner Will Do)
You might think your dusty workshop floor or the back of a closet is fine, but overlockers are sensitive to their environment. The ideal storage spot is a dry, temperature-controlled area that's away from direct sunlight, away from heating/cooling vents, and away from areas where liquids are used (like sinks or dye stations).
Let's break down the non-negotiables:
- Humidity control: Aim for a humidity level between 40% and 50%. High humidity (think bathrooms, basements, or summer workshops without AC) causes rust on metal parts. Low humidity (above 60°F or below 30% humidity) can make plastic parts brittle and thread dry out. If your workshop is damp, invest in a small dehumidifier or a silica gel packet placed near the machine. I keep a few bulk silica gel packets in my overlock storage bins-they're cheap and absorb moisture without any fuss.
- Temperature stability: Fluctuating temperatures (like a garage that's 90°F during the day and 50°F at night) cause condensation inside the machine, which leads to rust. Keep your storage area between 60°F and 75°F-room temperature is perfect.
- No direct sunlight: Sunlight fades plastic parts and can warp the body of the machine over time. It can also make the thread dry and brittle, so never store spools of thread in direct sun near your overlock.
- No heavy traffic: Don't store your overlock under a workbench where boxes of fabric or tools will lean on it. Even small bumps can bend the needle bar, misalign the loopers, or damage the tension dials. If you have to tuck it under a bench, use a thick cushion or a dedicated machine cover to pad it.
Step 3: Cover It Up (But Not With Just Any Cloth)
Once your machine is cleaned and prepped, the next step is covering it. A lot of people use an old bed sheet or a t-shirt, but those are actually bad for overlock storage. Why? Cotton fabrics hold moisture-if your workshop is even slightly damp, the sheet will trap that moisture against the machine, leading to rust. They also don't block small dust particles very well, and they can leave lint on the machine if they're not washed regularly.
Instead, use a specialized overlock machine cover, or a heavy-duty polyester cover made for sewing equipment. These covers are breathable, block dust, and don't hold moisture. If you're storing your machine in a bin (more on that next), make sure the cover fits snugly but not too tight-you don't want to press on the dials or buttons.
For clients who store their overlock for long periods (like over winter, if you work in a seasonal apparel business), I also recommend placing a small desiccant packet inside the cover with the machine. This extra step absorbs any lingering moisture that could build up over months.
Step 4: Properly Transportable Storage (For When You Need to Move the Machine)
Wait-storage isn't just about leaving it in one spot. If you need to move your overlock machine (say, to a new workshop or a trade show), you have to prepare it for transport too, even if you're only moving it a few feet.
Always remove the thread spools before moving. Spools can fall off the pins, roll around, and scratch the machine's body or tangle inside the loopers. For industrial overlockers like the 4 Thread Industrial Overlocker, I recommend removing the needle bar and looper covers if you're moving it a long distance, then wrapping those parts individually in bubble wrap to prevent scratches. For smaller machines, like the 2 Needle 3 Thread Overlock Sewing Machine, you can secure the presser foot down (check your manual-most have a lever to lock it) so it doesn't bounce around.
When placing the machine in a storage bin for transport, line the bin with a soft blanket or bubble wrap. Don't let the machine slide around-use small pieces of foam to secure it in place. Never stack anything on top of the machine, even if it's "light" fabric.
Step 5: Long-Term Storage (3+ Months) – The Extra Steps That Make a Difference
If you're putting your overlock away for more than three months (like for seasonal work or a workshop shutdown), you need to take a few extra steps to protect it. These are the steps that separate a machine that lasts 5 years from one that dies after 2.
First, lubricate the moving parts. Most overlock machines come with a recommended oil-check your manual for the right type (never use regular motor oil, it's too thick). Apply a thin layer of oil to the feed dogs, looper shafts, and needle bar. Wipe off any excess oil with a dry cloth-too much oil attracts dust.
Next, wrap metal parts that are prone to rust. If you have a long-term storage plan, take the needle, looper, and tension discs and wrap them in a thin layer of parafilm or wax paper. This creates a barrier between the metal and moisture in the air. For the machine's external metal parts (like the base), you can apply a tiny bit of food-grade mineral oil and wipe it off-this prevents rust without leaving a sticky residue.
Finally, label everything. I can't tell you how many clients come back after a long shutdown, can't find their spare needles, or can't remember which thread is which. Label the bin (if you're using one) with the machine's model, the date it was stored, and a list of included parts (spare needles, presser feet, brushes). That way, when you pull it out, you don't have to rummage around looking for things.
What to Do When You Pull It Back Out of Storage
Once your storage time is over, don't just plug it in and start sewing. Take 10 minutes to give it a once-over. First, inspect the needle-if you wrapped it in parafilm, remove it and check for rust or bending. If there's any rust, replace it immediately (it can damage your fabric or the machine). Then, run a scrap of old fabric through the machine to test the stitch quality. If the tension is off, adjust the discs gently. If the machine is making strange noises, give it a quick clean before using it on your actual project.
Final Note: Invest in Your Machine, and It Will Invest in You
At the end of the day, your overlock machine is one of your most valuable tools. Whether you're a home sewer making custom clothes or a factory producing 1,000 units a week, storing it properly isn't just about maintenance-it's about protecting your profit. A well-stored overlock machine will stitch more consistently, last longer, and save you hundreds of dollars in repair costs down the line.
If you're in the market for a new overlock machine, or you want to upgrade your current setup, I work with workshops of all sizes to find the right fit-from small home businesses needing a 2 Needle 3 Thread Overlock Sewing Machine to large factories needing high-speed 4 Thread Industrial Overlocker units. Reach out to my team to learn more, or to get personalized advice on storage for your specific model.