Repairing a manicure machine: how to fix a router yourself

A manicure machine is an indispensable tool for both professional nail technicians and nail care enthusiasts. But even the most reliable equipment breaks down over time: vibration appears, power decreases, or the device stops turning on altogether. In most cases, repairs can be done yourself, saving on the cost of a service center.

In this article we will look at main malfunctions of manicure cutters, their causes and solutions. You will learn how to diagnose a breakdown, replace motor brushes, eliminate overheating, and even restore operation after a fall. We will pay special attention to models of popular brands - Strong 210, Tianji, Runail and others.

Important: if your machine is still under warranty, repairing it yourself may void it. In this case, it is better to contact an authorized service center.

Typical malfunctions of manicure machines and their symptoms

Before you begin repairs, you need to correctly diagnose the problem. Here most common symptoms and their possible reasons:

• 🔌 Doesn't turn on - the power cord is damaged, the power button is faulty, the fuse is blown, or there is a problem with the electric motor.
• 🌀 Weak power — wear of the motor brushes, clogged ventilation holes, low voltage in the network.
• 🔥 Overheating - long-term operation without interruption, malfunction of the cooling system, use of unsuitable attachments.
• 🎛️ Strong vibration — rotor imbalance, bearing damage, loose fastenings.
• 🔊 Extraneous noise — dust or hair getting into the mechanism, wear of gears (in gear models).

If the machine Strong 210 or Runail Pro suddenly stopped working, check first power supply and power cord. Often the problem lies in a banal wire break at the base of the plug.

⚠️ Attention: Do not disassemble the machine connected to the network! Even if it is not working, there may be residual voltage on the board.

Repair tools and materials

To repair a manicure machine with your own hands, you will need:

• 🔧 Set of screwdrivers (phillips, flat, torx for some models).
• 🔍 Magnifying glass or magnifying glass for examining small parts.
• 🧲 Tweezers and magnet for removing small screws.
• 🧴 Alcohol or contact cleaner (Kontakt 60, WD-40 Specialist).
• 🔌 Multimeter for checking circuits (not necessary, but useful).
• 🛠️ Set of brushes for electric motor (select by model).
• 🧵 Thermal paste (if replacement is required on the radiator).

For models with speed adjustment (for example, Tianji 20000) may be required soldering iron and solderif the problem is in the control board. However, such repairs are best left to professionals.

Where to buy spare parts? For popular brands (Strong, Runail, Irisk) parts are sold at AliExpress, in stores like "World of Nails" or from official dealers. The cost of brushes for the engine is from 200 to 600 rubles, bearings - from 150 rubles.

Step-by-step instructions: disassembling a manicure machine

Disassembling most milling cutters follows a similar pattern, but there are nuances depending on the model. Let's look at the process using an example Strong 210:

1. Unplug the machine and remove the battery (if it is removable).

2. Remove the nozzle and use a screwdriver to unscrew the screws on the bottom cover. In some models they are hidden under rubber feet.

3. Carefully pry off the lid with a plastic spatula. Be careful - there may be wires inside that go to the power button.

4. Disconnect the control board connectors (if equipped) and remove the motor.

In geared machines (for example, Irisk Professional) after removing the cover you will see the gears. They need to be cleaned of old grease and inspected for tooth wear.

Inspect the integrity of the wires|Check the motor mounting|Clean the ventilation holes|Take photos of the location of parts before removing-->

⚠️ Attention: In cars with brushless motor (for example, Runail Pro 2) disassembly is more difficult - there are no brushes, and the problem often lies in the control board. It is better not to carry out such repairs without experience.

Replacing motor brushes: the most common solution to the problem

Brush wear is the main reason power drop and unstable work cars. On average, they last for 1–2 years of active use. Replacement process:

1. After disassembly, locate the brush holders (usually located on the sides of the motor).

2. Remove the old brushes with tweezers. They can be secured with springs or screws.

3. Clean the brush holders from coal dust with alcohol.

4. Install new brushes (for example, for Strong 210 will fit 4×4×10 mm).

5. Check the ease of movement of the rotor - it should rotate without jamming.

Critical point: after replacing the brushes, the machine may spark in the first minutes of operation - this is normal, this is how new parts are worn in. But if the sparking does not stop after 5-10 minutes, then the brushes are installed incorrectly or are not the right size.

Car model	Brush type	Average price, ₽	Notes
Strong 210	4×4×10 mm	250–400	Also suitable for Strong 130
Tianji 20000	3×5×12 mm	350–500	Often sold complete with bearings
Runail Pro	Brushless motor	—	No brush replacement required
Irisk Professional	4×5×11 mm	300–450	Springs included

Elimination of overheating and vibration

Overheating is a common problem during long-term operation. If the body of the machine becomes hot, follow these tips:

• ⏱️ Let's rest every 20–30 minutes of operation (especially for budget models).
• 🌀 Clean the vents remove dust with compressed air or a soft brush.
• 🛢️ Replace thermal paste on the radiator (if there is one). Use compounds like KPT-8 or Arctic MX-4.
• 🔄 Check bearings - if they are loose, they need to be replaced.

Vibration often occurs due to:

• 🔧 Rotor imbalance — try reinstalling the nozzle.
• 🛠️ Bearing wear — a crunching or grinding sound is heard when rotating.
• 🔩 Loose fastenings — check all the screws inside the case.

For models with adjustable speed (for example, Tianji) vibration may occur at low speeds. This is normal, but if it persists in all modes, diagnostics are required.

How to check bearings without disassembling?

Rotate the shaft by hand - if you feel play or it rotates with jamming, the bearings are worn out. Also listen: a crunching or grinding sound during operation is a sure sign of the need for replacement.

Repair after a fall or mechanical damage

Dropped your car? Don't panic. First, inspect it for external damage:

• 🔍 Cracks on the body - if they do not affect internal parts, you can seal them epoxy resin.
• 🔧 Damage to the nozzle mounting - check if the shaft is bent.
• 🔌 Wire break - most often the place of the plug or entrance to the case suffers.

If after the machine falls won't turn on, sequence of actions:

1. Check fuse (if your model has it).

2. Inspect the control board for loose parts or cracks.

3. Ring with a multimeter power cable and power button.

In models with lithium-ion batteries (for example, Runail Cordless) after a strike, protection may be triggered. Try removing the battery for 10 minutes, then installing it back.

⚠️ Attention: If after the fall appears burning smell, do not turn on the machine! This is a sign of a short circuit and requires professional repair.

Prevention and care: how to extend the life of your machine

Following simple rules will help avoid most breakdowns:

• 🧹 Clean after every use — remove dust and nail particles from the attachments and body.
• 🛢️ Lubricate the gearbox (if there is one) 1-2 times a year with special lubricant for electric motors.
• 🔌 Use a voltage stabilizer — surges in the network reduce the service life of the engine.
• 🔋 Store in a dry place — moisture leads to corrosion of contacts.

For models with battery (Runail Cordless, Irisk Akku):

• 🔄 Once every 3 months, completely discharge and charge the battery.
• 🔌 Do not leave it on charge for more than 8 hours.
• 🌡️ Avoid working at temperatures below +10°C.

If you use the machine every day (for example, in a salon), check it every six months. preventive disassembly — clean the brushes, check the bearings and renew the lubricant.

FAQ: Frequently asked questions about repairing manicure machines

Is it possible to repair a machine with a brushless motor yourself?

In most cases no. Brushless motors (as in Runail Pro 2) do not have brushes, and problems are usually related to control board or stator windings. Repairs require special skills and equipment (e.g. oscilloscope).

How much does a repair at a service center cost?

Prices depend on breakdown:

• Replacement of brushes - 500–1000 ₽.
• Replacement of bearings - 800–1500 ₽.
• Repair of the control board - 1500–3000 ₽.
• Replacing the engine - 2000–4000 ₽ (sometimes it’s cheaper to buy a new car).

In the regions, the cost may be 20–30% lower.

Why does the machine spark?

Sparking is normal for brushed motors, but if it becomes stronger than usual, the reasons may be as follows:

• Worn brushes or commutator.
• Dust or moisture getting into the collector.
• Incompatible brushes (wrong size or material).

Clean the commutator with alcohol and check the tightness of the brushes.

What is the service life of a manicure machine?

With proper care:

• Budget models (Irisk, Vitek) - 1–2 years.
• Middle class (Strong 210, Tianji) - 3–5 years.
• Professional (Runail Pro, Makartt) - 5–7 years.

Service life depends on intensity of use and quality of care.

Is it possible to use the machine after repair on clients?

If the repair concerned mechanical parts (replacing brushes, bearings, cleaning), then yes. But if the intervention affected electrician (soldering circuit boards, replacing the motor), it is better to test the machine on yourself or on training tips for 1–2 days.