The Marathon N7 nail drill machine is a powerful device for manicures and complete pedicures. It easily handles full combined pedicure treatments.
The unit is equipped with overload protection.
It also supports speed control and direction switching, even while the handpiece is running at speed — something not usually recommended with other devices (excluding the K35 Mini model, which also has this feature)
Equipped with variable speed settings, the N7 allows for precise control, making it suitable for a variety of tasks such as filing, buffing, and cuticle care. The powerful motor provides efficient performance while maintaining a quiet operation and minimal vibration, which is ideal for detailed nail work.
Compatible with a wide range of attachments, the Saeyang Marathon N7 is versatile enough to meet various needs in nail care, from shaping and polishing to nail art. Its reliability and ease of use make it a popular choice in salons and for home use alike.
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Powerful Motor: The N7 is equipped with a high-performance motor, delivering reliable power for various nail care tasks.
-
High Speed: It can reach speeds of up to 40,000 RPM, allowing for efficient filing, shaping, and polishing of nails.
-
Variable Speed Control: Users can easily adjust the speed to suit different applications, providing flexibility for detailed work or broader tasks.
-
Overload Protection: Built-in overload protection safeguards the motor, preventing damage during intense use.
-
Automatic safety overload protection system
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Dust-proof cover for switch
-
Built-in handpiece cradle & bit stand
-
Forward / Reverse direction switch
- Weight — 3,75 lb (1,700 g)
- Dimension — 4.53" W x 5.79" D x 3.78" H (W115 x D147 x H96 mm)
-
On / Off foot switch (SFP-27 optional and not included in the package)
-
Variable speed control pedal (FS-60 optional and not included in the package)
Warranty: SAEYANG products are covered with 1 year manufacture limited warranty. Please contact us if you have troubles with SAEYANG products that were purchased from us. We will help you to file warranty claim, get replacement, or take care of your repair if required.

Saeyang Marathon-N7 Main Unit ONLY (NO HANDPIECE)
- Unit price
- / per
FREE shipping on orders over $100
Shipping from United States warehouse by USPS or UPS
Delivery time 1-4 business days
Routine Maintenance vs Warranty Claims
Our drill machine handpieces are precision tools designed for professional use. Like any mechanical device, they require regular maintenance to function reliably over time. Natural wear is expected and is not considered a manufacturing defect.
Important:
- Routine maintenance such as cleaning, lubrication, and replacement of wear parts (e.g., bearings, shafts, collets) is not covered under warranty.
- Warranty covers only manufacturing defects under normal, proper use.
Reminder:
Cleaning and maintenance instructions are provided in the machine's user manual. Customers are expected to follow these guidelines to preserve product performance.
Initial Warm-Up Period for New Handpieces
All new handpieces have a warm-up period during initial use.
For the first 2 weeks, it is normal to experience:
- Slight noise
- Minor vibration
- Irregular behavior during rotation
These symptoms should subside within 3 hours of total (non-continuous) use.
If issues persist beyond this, please contact us for further evaluation.
Warranty claims will not be accepted for noise or vibration reported during the warm-up period.
Preventing Dust Damage – Use of Protection Bur
It is very important to install the protection bur (included with your handpiece) or any drill bit when the handpiece is not in use.
This prevents dust, debris, and moisture from entering the chuck and causing internal damage.
Failure to use a protection bur may lead to early wear, improper function, and can void warranty eligibility.
Flat-Fee Maintenance Service – $50
If your handpiece requires service and is not eligible for warranty, we offer a flat-rate $50 maintenance service, which includes:
- Prepaid shipping label to send the handpiece to our service center
- Full diagnostic inspection
- Internal cleaning, lubrication, and minor repairs
- Return shipping back to you
This service also applies if a warranty claim is submitted, but the issue is diagnosed as routine wear or dust-related damage.
Shipping Policy (After 30 Days)
For all claims after 30 days from purchase, the customer is responsible for:
- Shipping costs related to both warranty and paid service
- Proper packaging and protection to avoid transit damage
Our flat $50 service includes round-trip shipping if you use our label. You may also choose to use your own label, but the service cost remains unchanged.
Packaging & Shipping Requirements
Before shipping:
- Do NOT ship dirty products, please wipe them out from nail dust before shipping
- Insert a protection bur or drill bit in the chuck
- Pack the handpiece securely using protective materials (foam, bubble wrap)
- Use a sturdy box to avoid damage
Units arriving without proper cleaning or protection may be delayed or rejected.
How to Submit a Warranty or Service Claim
To begin a warranty or maintenance request, please send us the following:
📹 A single video that clearly shows:
- The serial number (on the unit)
- A demonstration of the problem in real-time
✉️ Include the serial number in text format in the email subject or body.
📧 Send to: info@foxnailsusa.com
We will begin the warranty process only once all required information is received.
Recommended Maintenance Schedule
- Light usage (1–2 hours/week): Service every 6–12 months
- Heavy or salon use (daily): Service every 3–6 months
Proper care ensures long-term performance and reliability.
Still Have Questions?
Our team is ready to help with maintenance, warranty, or product support.
📩 Contact: info@foxnailsusa.com
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The Marathon N7 nail drill machine is a powerful device for manicures and complete pedicures. It easily handles full combined pedicure treatments.
The unit is equipped with overload protection.
It also supports speed control and direction switching, even while the handpiece is running at speed — something not usually recommended with other devices (excluding the K35 Mini model, which also has this feature)
Equipped with variable speed settings, the N7 allows for precise control, making it suitable for a variety of tasks such as filing, buffing, and cuticle care. The powerful motor provides efficient performance while maintaining a quiet operation and minimal vibration, which is ideal for detailed nail work.
Compatible with a wide range of attachments, the Saeyang Marathon N7 is versatile enough to meet various needs in nail care, from shaping and polishing to nail art. Its reliability and ease of use make it a popular choice in salons and for home use alike.
-
Powerful Motor: The N7 is equipped with a high-performance motor, delivering reliable power for various nail care tasks.
-
High Speed: It can reach speeds of up to 40,000 RPM, allowing for efficient filing, shaping, and polishing of nails.
-
Variable Speed Control: Users can easily adjust the speed to suit different applications, providing flexibility for detailed work or broader tasks.
-
Overload Protection: Built-in overload protection safeguards the motor, preventing damage during intense use.
-
Automatic safety overload protection system
-
Dust-proof cover for switch
-
Built-in handpiece cradle & bit stand
-
Forward / Reverse direction switch
- Weight — 3,75 lb (1,700 g)
- Dimension — 4.53" W x 5.79" D x 3.78" H (W115 x D147 x H96 mm)
-
On / Off foot switch (SFP-27 optional and not included in the package)
-
Variable speed control pedal (FS-60 optional and not included in the package)
Warranty: SAEYANG products are covered with 1 year manufacture limited warranty. Please contact us if you have troubles with SAEYANG products that were purchased from us. We will help you to file warranty claim, get replacement, or take care of your repair if required.

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