Introduction
Thank you for choosing the Dpofirs Multipurpose Drill Bit Sharpener. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your new tool. Please read this manual thoroughly before use and retain it for future reference.
Safety Information
Always prioritize safety when operating power tools. Ensure you wear appropriate personal protective equipment, such as safety glasses, to prevent injury. Keep hands clear of moving parts during operation. Disconnect the power supply before performing any maintenance or when the tool is not in use. Do not operate the sharpener in wet conditions.
Setup
- Unpacking: Carefully remove the drill bit sharpener from its packaging. Inspect for any damage that may have occurred during shipping.
- Placement: Place the sharpener on a stable, flat, and non-slip surface. The unit is equipped with non-slip foot pads for stability.
- Power Connection: Connect the power cord to a standard 110-120V US electrical outlet. Ensure the power switch is in the 'off' position before plugging in.


Operating Instructions
This drill bit sharpener is designed for easy and accurate sharpening of 130° standard drill bits. It is suitable for drill bits with diameters ranging from approximately 3mm (1/8in) to 12mm (15/32in).
- Identify Drill Bit Size: Determine the diameter of the drill bit you wish to sharpen. The sharpener features 19 hole positions for various sizes.
- Select Correct Hole: Insert the drill bit into the corresponding hole position on the sharpener. The positioning plate helps control the angle.
- Power On: Turn on the sharpener using the power switch.
- Sharpening: Gently press the drill bit into the selected hole. The machine will grind the back cut surface of the 130° standard drill bit. Only the front corner is grindable; the rear corner is not. Apply minimal force, allowing the sharpener to do the work.
- Check Sharpness: After a few seconds, remove the drill bit and inspect its sharpness. Repeat if necessary, ensuring even grinding on both sides.


Important Notes:
- The machine can only grind the front corner, not the rear corner.
- If your drill has no rear corner, the cross edge of the drill will be longer after grinding, and metal drilling may be prone to slipping. It is recommended to grind it again before using it.
- Cobalt alloy drill bits cannot be used with this sharpener.
Operational Video
Maintenance
Regular maintenance ensures the longevity and optimal performance of your drill bit sharpener. The primary maintenance task involves replacing the grinding wheel when it becomes worn.
Replacing the Grinding Wheel:
- Disconnect Power: Always unplug the sharpener from the power outlet before any maintenance.
- Remove Screws: Locate and remove the screws on both sides of the lower limit plate by turning them counterclockwise.
- Remove Grinding Wheel Assembly: Carefully take out the grinding wheel assembly.
- Loosen Pressing Plate Screw: Loosen the pressing plate screw clockwise to detach the old grinding wheel.
- Install New Grinding Wheel: Place the new grinding wheel onto the assembly, ensuring it is properly seated. Adjust its position so it can be pressed down firmly.
- Reassemble: Reattach the grinding wheel assembly and secure the lower limit plate screws by turning them clockwise.
Grinding Wheel Replacement Video
Troubleshooting
No specific troubleshooting steps are provided in the product information. If you encounter issues, please ensure the unit is properly connected to power and that the grinding wheel is correctly installed and not excessively worn. For persistent problems, contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Dpofirs |
| Model Number | Dpofirsra657bdgug |
| Rated Power | 95W |
| Rated Speed | 1350rpm |
| Applicable Drill Bit Diameter | Approx. 3-12mm / 0.12-0.47in (1/8in - 15/32in) |
| Supported Drill Bit Sizes | 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm |
| Features | Clear control, 19 holes, non-skid foot pad, three-dimensional air vent |
| Package Dimensions | 11.14 x 7.6 x 4.61 inches |
| Item Weight | 2.55 pounds |
Warranty and Support
Specific warranty details are not provided in the product information. For warranty claims, technical support, or inquiries about replacement parts (such as grinding wheels), please refer to the contact information provided with your purchase or visit the official Dpofirs store on Amazon: Dpofirs Store.