Dremel 8250-5 12V Lithium-Ion Variable Speed Cordless Rotary Tool User Manual

1. Introduction

The Dremel 8250-5 is a 12V Lithium-Ion variable speed cordless rotary tool featuring advanced brushless motor technology. This tool is designed to deliver corded performance with the convenience of cordless operation, offering enhanced power, extended runtime, and increased durability. It is compatible with all Dremel rotary accessories and attachments, making it suitable for a wide range of applications including cutting, sanding, drilling, cleaning, grinding, and sharpening.

This manual provides essential information for the safe and effective use of your Dremel 8250-5 rotary tool. Please read it thoroughly before operation and retain it for future reference.

2. Kit Contents

Your Dremel 8250-5 kit includes the following items:

• Dremel 8250 Brushless 12-Volt Rotary Tool
• B816-01 12V 3.0Ah Lithium-Ion Battery Pack (x1)
• GAL12V-20 Battery Charger (x1)
• EZ456 1-1/2" EZ Lock Cut-off Wheel (x3)
• EZ476 1-1/2" EZ Lock Cut-off Wheel (x1)
• EZ402 EZ Lock Mandrel (x1)
• Accessory Storage Case
• Fabric Tool Storage Case

3. Setup

3.1 Battery Charging

The Dremel 8250-5 is powered by a 12V 3.0Ah Lithium-Ion battery. For optimal performance and battery longevity, fully charge the battery before its first use.

1. Insert the battery pack into the GAL12V-20 charger.
2. Connect the charger to a standard power outlet.
3. A green blinking light on the charger indicates that the battery is charging.
4. A solid green light indicates the battery is fully charged. Full charge takes approximately 95 minutes.
5. Remove the battery from the charger once fully charged.

3.2 Accessory Installation and Removal

The Dremel 8250-5 features an EZ Twist Nose Cap for quick and easy accessory changes without the need for a separate wrench for most accessories. For collet-based accessories, a wrench is provided.

1. To Install an Accessory:
   • Press and hold the shaft lock button located near the nose of the tool.
   • Unscrew the collet nut.
   • Insert the accessory shank fully into the collet.
   • Tighten the collet nut by hand. For a secure grip, use the provided wrench if necessary, ensuring not to overtighten.
   • Release the shaft lock button.
2. To Remove an Accessory:
   • Press and hold the shaft lock button.
   • Loosen the collet nut using the wrench or by hand.
   • Remove the accessory.
   • Tighten the collet nut slightly to prevent loss.

4. Operating Instructions

4.1 Power On/Off and Speed Control

The Dremel 8250-5 features a variable speed dial and LED speed indicators for precise control over your applications.

• Power On/Off: Use the main power switch to turn the tool on or off.
• Variable Speed Dial: Adjust the speed from 5,000 to 30,000 RPM using the variable speed dial. The LED speed indicators will illuminate to show the current RPM setting.
• Memory Function: If the tool is turned off and then on again within a 5-minute period, it will resume at its last speed setting. If turned back on after a 5-minute period, the tool will resume at its default speed setting of 15,000 RPM.

4.2 Battery Life Indicators

The LED digital display provides real-time battery life indicators:

• 3 LEDs: 70-100% charge remaining.
• 2 LEDs: 40-70% charge remaining.
• 1 LED: 20-40% charge remaining.
• 1 Flashing LED: Below 20% charge remaining. Be prepared for the tool to shut off soon.

4.3 Applications

The Dremel 8250-5 is highly versatile. Examples of applications include:

• Carving/Engraving
• Cutting
• Grinding/Sharpening
• Sanding
• Cleaning/Polishing
• Routing

5. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Dremel 8250-5 rotary tool.

• Cleaning: Keep the tool's ventilation openings clear and free of debris. Use a soft brush or compressed air to clean dust and particles from the motor housing and vents.
• Accessory Care: Inspect accessories before each use for wear or damage. Replace worn or damaged accessories immediately to prevent injury and ensure efficient operation.
• Battery Care: Store the battery in a cool, dry place. Avoid exposing the battery to extreme temperatures.

6. Troubleshooting

The Dremel 8250-5 is equipped with a red warning light to indicate specific operational issues:

• Red Warning Light (Solid): Tool Stall / Overload Warning:

  This indicates that too much pressure is being applied to the tool. Reduce pressure to hold and guide the tool, allowing the speed of the tool to perform the work. Excessive force can lead to motor damage or premature wear.

• Red Warning Light (Flashing): Excessive Battery Temperature Warning:

  This indicates that the tool or battery is overheating. Turn the tool off and remove the accessory (once cooled). Allow the battery to return to normal operating temperature before resuming use. If the tool itself is hot, allow it to cool down. Turn the tool back on and allow it to run without load for a short period to help cool the motor.

Battery Performance in Cold Conditions: Lithium-Ion batteries may experience reduced performance or rapid discharge when exposed to cold temperatures. If working in cold environments, ensure the battery is kept at a moderate temperature before use to maximize runtime.

7. Specifications

8. Warranty and Support

The Dremel 8250-5 rotary tool comes with a Limited Lifetime Manufacturer Warranty. This warranty applies to the 8250 tool only and excludes the battery and charger. This warranty is valid in the USA & Canada.

For further assistance, troubleshooting, or warranty claims, please refer to the official Dremel support channels or visit the Dremel Store.