1. Introduction
The Casfuy Dog Nail Grinder is designed to provide a safe, effective, and comfortable solution for pet nail grooming. Utilizing an advanced diamond drum bit grinder, it ensures painless and precise trimming for various pet sizes.

Figure 1: Casfuy Dog Nail Grinder with charging cable and protective cap.
2. Product Components
Familiarize yourself with the main parts of your Casfuy Dog Nail Grinder:
- Nail Grinding Wheel: The diamond-coated bit for effective and safe grinding.
- Protective Sleeve: Covers the grinding wheel when not in use and helps guide nails during use.
- Speed Switch & Power On/Off: Controls the device's power and switches between two grinding speeds.
- Power Bright Blue Light: Indicates power status and charging.
- Charging Input Port: Micro-USB port for recharging the device.

Figure 2: Labeled components of the Casfuy Dog Nail Grinder.

Figure 3: The advanced diamond drum bit grinder for efficient and safe nail trimming.
3. Setup and Charging
3.1 Initial Charging
Before first use, ensure the nail grinder is fully charged. The device is rechargeable and has an indicator light on the bottom that turns on when charging. Each grinder has a built-in battery that lasts approximately 2 hours after a 3-hour charge.
The product can be easily charged with a phone adapter, a USB outlet of a power bank/computer/car. No adapter is included in the package to accommodate worldwide voltage standards.

Figure 4: The nail grinder is conveniently rechargeable via USB.
3.2 Safety Information
For your pet's safety, it should not be more than 5 seconds for one lasting time on a single nail. Be aware to adjust the grooming angle to polish pet nails. If your dog has long hair, band it back to prevent it from getting caught in the grinder's spinning tip. Trimming long hair on paws and between foot pads first can further reduce risk.
Using a small nylon stocking or sock over the pet’s paw and pushing the nails through a hole at the end can ensure only the nails are exposed, which is a good tip for safe use.
4. Operating Instructions
4.1 Preparing Your Pet
Every dog has different sensitivity. For small or anxious dogs, be patient and introduce the grinder gradually. Allow your pet to get used to the sound and vibration of the grinder before beginning the trimming process.

Figure 5: The Casfuy grinder operates with super low noise and vibration, reducing pet anxiety.
4.2 Selecting the Grinding Port and Speed
The grinder features an adjustable 2-speed switch and 3 grinding ports to accommodate different pet sizes and nail hardness:
- Port 1: For small-sized pets.
- Port 2: For medium-sized pets.
- Port 3: For large-sized pets and fast grinding of thick nails.
Simply choose the appropriate port and speed (low or high) depending on your pet's size and nail hardness.

Figure 6: Choose the correct grinding port for your pet's size.
4.3 Grinding Process
- Introduce: Allow your pet to sniff and get accustomed to the grinder.
- Apply: Gently place your pet's nail into the chosen grinding port. Put the electric nail grinder around a 45-degree oblique angle and trim the nail round. Grind each nail for no more than 5 seconds at a time to prevent overheating and discomfort.
- Reward: Reward your pet after each successful nail or paw to create a positive association.
- Clean: After use, clean the grinding head as described in the Maintenance section.

Figure 7: Step-by-step guide for correct grinder usage.

Figure 8: Proper angle for trimming dog nails to achieve a rounded finish.
5. Maintenance
Regular cleaning ensures optimal performance and longevity of your Casfuy Dog Nail Grinder.
- After each use, gently wipe the grinding head with a clean, dry cloth to remove any nail dust or debris.
- Ensure the device is turned off before cleaning.
- Do not rinse the entire unit under water. The grinding head can be carefully cleaned with a small brush if needed.
- Store the grinder in a dry, safe place away from direct sunlight and extreme temperatures.
6. Troubleshooting
If you encounter any issues with your Casfuy Dog Nail Grinder, please refer to the following common solutions:
- Device not turning on: Ensure the device is fully charged. Connect it to a USB power source and allow it to charge for at least 3 hours.
- Grinding performance is weak: Check if the grinding head is clogged with nail dust. Clean it thoroughly as described in the Maintenance section. Ensure the correct speed setting is selected for the nail hardness.
- Excessive noise or vibration: This is unlikely due to the super-quiet technology. If it occurs, ensure the grinding head is securely attached and free from debris.
- Pet is anxious: Re-introduce the grinder gradually. Use positive reinforcement (treats, praise). Consider shorter grinding sessions.
If the problem persists, please contact Casfuy customer support for further assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Casfuy |
| Model Name | N10 |
| Item Weight | 9.9 ounces |
| Item Dimensions (LxWxH) | 6.89 x 2.95 x 1.38 inches |
| Battery Life | 2 hours operating time (after 3-hour charge) |
| Grinding Bit | Advanced Diamond Drum Bit |
| Speed Settings | 2-Speed (Low/High) |
| Grinding Ports | 3 (Small, Medium, Large/Fast Grinding) |
| Noise Level | Super Low Noise & Vibration (<50dB) |
8. Warranty and Support
The Casfuy Dog Nail Grinder comes with a 1 Year Warranty from the date of purchase.
For any product inquiries, technical support, or warranty claims, please visit the official Casfuy Store or contact their customer service directly.
Official Casfuy Store: Casfuy Store on Amazon


