Why is my overlocker making an unusual noise?

Abnormal noise on the serger: when a machine that was previously smooth starts to click, squeak, or produce a metallic noise on the serger, concern is justified. A noisy serger immediately draws attention, as the sound is often the first sign that an adjustment, maintenance, or mechanical part is causing a problem. In most cases, this abnormal noise on the serger does not indicate a serious breakdown, but it should never be ignored.

Users primarily want to understand if the noise is normal, if they can continue sewing safely, and which actions are truly safe. Maintaining or disassembling a serger without knowledge can worsen the situation.

The goal of this article is to help you precisely identify an abnormal noise on the serger, recognize the different types of noises, understand their causes, and know when to act yourself… and especially when to call a professional.

Abnormal noise on the serger: is it serious?

A change in noise is not always a sign of immediate breakdown. Some sound variations are normal depending on the fabric, speed, or type of sewing, but others should raise concern.

The challenge is to distinguish an acceptable noise from an abnormal noise on the serger that requires a quick check.

Points to observe as a priority

• Usual noise vs new noise
• Sudden or gradual appearance
• Constant or intermittent noise
• Impact on stitch quality

A new noise, even if slight, should always be taken seriously before continuing a project.

What types of noises can a serger make?

Identifying the exact nature of the noise is a key step. Each sound generally corresponds to a specific cause.

Recognizing the type of abnormal noise on the serger helps quickly guide the diagnosis.

Metallic noise or clicking: what does it mean?

A serger clicking sound or a metallic noise often indicates abnormal contact between internal parts.

• Collision between needle and looper
• Loose screw or part
• Misaligned component

This type of noise requires an immediate stop of the machine to avoid wear or breakage.

Continuous squeaking or rubbing

A squeaking or regular rubbing is often related to a lack of smoothness in internal movements.

• Lack of proper lubrication
• Accumulation of dust and lint
• Progressive component wear

Abnormal noise on the serger of this type can quickly worsen if the machine continues to operate.

Mechanical causes of abnormal noise on the serger

When the noise persists despite correct settings, it may be a serger mechanical problem. The serger is a precision machine: its internal parts are adjusted to a tenth of a millimeter.

A misalignment is enough to cause an abnormal noise on the serger.

Common mechanical causes

• Loose internal part
• Looper misalignment
• Component wear
• Damaged or unsuitable needle

To go further, manufacturers like Juki or Bernina recommend having mechanical noises diagnosed by our authorized repairer.

Settings and maintenance: common causes of noise

Incorrect adjustment or improper maintenance explain a large part of cases of noisy serger. However, it is essential to distinguish what can be checked safely from what should be entrusted to a specialist.

An abnormal noise on the serger is often the result of excessive strain.

Incorrect settings causing the serger to be noisy

Some settings unnecessarily increase mechanical tensions.

• Thread tension too high
• Excessive sewing speed
• Inappropriate presser foot pressure

These settings can be adjusted cautiously, strictly following the manufacturer's manual.

⚠️ Maintenance: what not to do yourself

It is tempting to want to disassemble your machine in case of noise, but this carries significant risks.

• Disassembly of internal mechanics
• Non-compliant lubrication
• Looper adjustment
• Intervention without proper tools

Brands like Bernina, Pfaff, or Juki clearly recommend entrusting internal mechanical maintenance to a professional. A qualified repair technician will preserve the machine's precision, warranty, and longevity.

Summary table: noise, cause, and solution

This table helps quickly identify the probable cause of an abnormal noise on the serger and the appropriate action.

Bonus for Abnormal noise on the serger

Prevention remains the best protection against unusual noises. Proper use greatly limits the risks.

Good preventive practices

• Clean only accessible areas
• Respect the recommended speeds
• Use suitable needles
• Have the machine serviced regularly

Conclusion

An abnormal noise on the serger is a warning signal that should never be ignored. In most cases, it is an adjustment to be corrected or maintenance to be planned, but intervening yourself on the internal mechanics can worsen the problem.

Calling a qualified professional helps preserve the machine's precision, avoid costly repairs, and prolong the serger's lifespan. A machine well maintained by a specialist remains reliable, quiet, and pleasant to use.

FAQ on Abnormal noise on the serger

Does a serger always make noise?

Yes, but the noise must remain regular and stable. Any unusual variation should be checked.

Can I continue sewing with an abnormal noise?

It is strongly advised not to continue without identifying the cause.

Can I maintain my serger myself?

Surface cleaning only. Any mechanical intervention must be entrusted to a professional.

When to consult a repair technician?

As soon as the noise persists after simple checks or worsens.