Gisam 21V Cordless Drill Electric Impact Drill Rechargeable Electric Screwdriver Lithium-Ion Battery User Manual

1. General Safety Warnings

Always observe basic safety precautions when using electric tools to reduce the risk of fire, electric shock, and personal injury.

1.1. Work Area Safety

• Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks which may ignite the dust or fumes.
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

1.2. Electrical Safety

• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
• Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.

1.3. Personal Safety

• Always wear safety goggles or glasses with side shields to protect your eyes.
• Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.
• Stay alert, watch what you are doing and use common sense when operating a power tool. A moment of inattention while operating power tools may result in serious personal injury.
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.

1.4. Power Tool Use and Care

• Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
• Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
• Always remove the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
• Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
• Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
• Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.

1.5. Battery Tool Use and Care

• Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
• Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
• When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
• Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.

2. Product Overview

The Gisam 21V Cordless Drill is a versatile power tool designed for various drilling and screwdriving tasks. It features a powerful motor, multiple torque settings, and a two-speed gearbox for optimal performance.

2.1. Components

Description of Components:

• High Quality Chuck: For holding drill bits and screwdriver bits.
• Gear Torque Adjustment: Allows selection of 25+3 torque settings for different applications.
• Two-Speed Adjustment Switch: Selects between low speed (1) for screwdriving and high speed (2) for drilling.
• Heat Dissipation Hole: Ensures proper cooling of the motor during operation.
• LED Lighting: Illuminates the work area for better visibility.
• Positive and Negative Adjustment (Forward/Reverse Switch): Controls the direction of rotation.
• Infinitely Variable Switch (Trigger): Controls the speed of the drill.
• Handle: Ergonomic grip for comfort and control.

2.2. Working Modes

The drill offers three main working modes:

• Impact Mode: Suitable for concrete drilling, cement block drilling, and red brick wall drilling.
• Flat Drilling Mode: Ideal for ceramic tile drilling, wood drilling, and metal drilling.
• Screw Lifting (Screwdriver) Mode: Used for electric equipment overhaul, toy overhaul, and furniture assembly.

3. Setup and Assembly

3.1. Battery Installation and Removal

To install the battery:

1. Align the battery pack with the slot in the base of the drill handle.
2. Slide the battery pack into the handle until it clicks securely into place.

To remove the battery:

1. Press the release button on the battery pack.
2. Slide the battery pack out of the handle.

3.2. Chuck Operation and Bit Installation

The drill features a 1/2" keyless chuck for quick and simple bit replacement, holding up to 10mm bits.

To install a bit:

1. Rotate the chuck counter-clockwise to open the jaws.
2. Insert the desired drill bit or screwdriver bit into the chuck jaws.
3. Rotate the chuck clockwise to tighten the jaws firmly around the bit. Ensure the bit is centered and secure.

To remove a bit:

1. Rotate the chuck counter-clockwise to loosen the jaws.
2. Pull the bit out of the chuck.

3.3. Torque Adjustment

The drill offers 25+3 torque settings. Rotate the gear torque adjustment ring (located behind the chuck) to select the desired torque level. Higher numbers indicate higher torque. The 'drill' symbol indicates drilling mode, which bypasses the clutch for maximum power.

3.4. Speed Adjustment

Use the two-speed adjustment switch (located on top of the drill) to select between two speed ranges:

• Position 1 (Low Speed): Ideal for screwdriving and applications requiring higher torque and slower rotation.
• Position 2 (High Speed): Suitable for drilling and applications requiring faster rotation.

Always select the appropriate speed range before starting the tool.

4. Operating Instructions

4.1. Powering On/Off and Speed Control

The drill is equipped with an infinitely variable switch (trigger) for precise speed control.

1. To start the tool, pull the trigger. The LED working light will illuminate.
2. To vary the driving speed, simply increase or decrease pressure on the trigger. The further the trigger is pulled, the greater the speed.
3. To stop the tool, release the trigger. The electric brake will stop the tool instantly.

4.2. Forward/Reverse Rotation

The positive and negative adjustment switch (forward/reverse switch) is located above the trigger.

• To rotate forward (clockwise), press the switch to the right.
• To rotate in reverse (counter-clockwise), press the switch to the left.
• To lock the trigger and prevent accidental starting, push the switch to the center position. The drill will not operate when the switch is in the locked position.

4.3. Impacting Techniques (for Impact Mode)

When using the impact mode for screwdriving, the duration of impacting directly affects the tightness of the fastener. Practice with various fasteners to determine the optimal impacting time for desired tightness. Be particularly careful with smaller fasteners, as they require less impacting to reach optimum torque.

Factors like oil, dirt, rust, or other matter on threads can affect tightness. The torque required to loosen a fastener is typically 75% to 80% of the tightening torque.

4.4. Depth Gauge (if included)

If your model includes a depth gauge, loosen the support handle, adjust the depth gauge to your desired drilling depth, and then tighten the support handle to fix the depth gauge in place.

5. Maintenance

5.1. Battery Charging

Use the provided AC100-240V battery charger. The charging indicator light on the charger will show the battery status:

If the battery pack is warm (e.g., immediately after heavy-duty operation), charging will not occur until the battery cools down. The charging process will then begin automatically.

5.2. Cleaning and Lubrication

• Regularly clean the tool with a soft, dry cloth. Do not use abrasive or solvent-based cleaning agents.
• Ensure the heat dissipation holes are clear of dust and debris to prevent overheating.
• Grease the oval indentation on the bit with appropriate grease at least once a month to ensure smooth operation and prolong bit life.

5.3. Storage

• Store the tool and battery packs in a cool, dry place, away from direct sunlight and moisture.
• Ensure the forward/reverse switch is in the locked (center) position before storing.
• Keep out of reach of children.

6. Troubleshooting

6.1. Common Issues and Solutions

• Tool not starting: Check if the battery is fully charged and properly installed. Ensure the forward/reverse switch is not in the locked (center) position.
• Abnormal vibration: Immediately stop the tool. Check for loose bits, damaged accessories, or internal issues. Do not use until the cause is identified and resolved.
• Battery not charging: Refer to the 'Charging Indicator Light' table in the Maintenance section. Ensure the battery temperature is within the acceptable range (0°C to 45°C).
• Chuck not gripping bit properly: Ensure the chuck is tightened firmly. If the issue persists, the chuck or bit may be worn and require replacement.

7. Specifications

8. User Tips

• Chuck Grip: If you experience issues with the chuck not gripping bits well, ensure the chuck is fully tightened. Over time, chuck jaws can wear, or debris can accumulate, affecting grip. Clean the chuck regularly.
• Battery Quantity: This product is available with either one or two batteries. Please check your specific package contents upon arrival.
• Charger Plug Type: The charger plug type (e.g., EU, US) may vary based on your region. Ensure you receive the correct plug type for your country.
• Power Output: The drill operates at 21V. The power output in watts will depend on the load and current draw during operation.

9. Frequently Asked Questions (FAQ)

Q: What are the highlights of this tool?

A: The highlights of this tool include a no load speed of 1450rmp and a CE certification.

Q: What are the benefits of using this tool?

A: Using this tool provides benefits such as cordless convenience, high no load speed, and CE certification.

Q: Which category does this tool belong to?

A: This tool belongs to the category of cordless screwdrivers and impact drills.

Q: What's the operation method of this product?

A: It is an electric screwdriver impact drill with a brushed motor. Detailed operation instructions are provided in Section 4 of this manual.

10. Warranty and Support

For any warranty claims, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.

An additional user manual in PDF format may be available for download from the product page or by contacting customer support.

11. Product Video Demonstration

This video demonstrates the basic functions of the Gisam 21V Cordless Drill, including battery attachment, speed switch operation, forward/reverse control, and trigger activation.