Gisam 125MM Brushless Electric Angle Grinder User Manual

1. Important Safety Instructions

Always read and understand all safety warnings and instructions before operating this power tool. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury.

1.1 General Power Tool Safety

• Always wear safety glasses and ear plugs during operation. Additional protective equipment such as dust respirators, gloves, safety helmets, and aprons should also be used.
• Keep the protective cover in a fixed and secure position.
• Carefully check for cracks and damages on the tool or accessories before each use. Replace any damaged parts immediately.
• Handle grinding and cutting discs with extreme care.
• Do not damage the spindle, flange, or locking nut. Damage to these components can lead to disc failure.
• Firmly grasp the tool with both hands during operation.
• Keep hands and other body parts away from rotating parts.
• Ensure that the grinding wheel or cutting disc is not in contact with the workpiece before switching on the tool.
• Pay close attention to sparks generated during operation. Direct sparks away from yourself, other people, and flammable objects.
• Be aware that the grinding wheel or cutting disc will continue to rotate for a short period after the tool is switched off.
• Do not touch the workpiece immediately after grinding or cutting, as it may be extremely hot and cause burns.
• Do not use this tool to process materials containing asbestos.
• Do not use water or grinding fluid with this tool.
• When using a cutting wheel, always use a dust collecting wheel cover in accordance with national regulations.
• The cutting wheel must not be subjected to lateral pressure.
• Do not use machine bowl wheels with this polishing machine; forced use may cause serious bodily injury.
• Adjust the cutting depth according to the workpiece thickness.
• Fix the workpiece on a stable platform. Proper support minimizes body exposure and reduces the risk of saw blade jam or tool runaway.
• If cutting hidden wires, hold the tool by its insulated gripping surfaces.
• Use a saw guide or straight-edge guide for improved cutting accuracy and reduced blade jam.
• Use saw blades with the correct shaft hole size and shape (diamond or round). Incorrectly matched blades can deviate from the center and cause loss of control.
• Do not use damaged or incorrect saw blade washers or bolts.
• To prevent rebound, hold the tool firmly with both hands and adjust your arm position. Position your body to the side, not in line with the saw blade.
• If the blade gets stuck, immediately release the trigger and wait for the disc to stop completely before attempting to remove the tool from the workpiece.
• When restarting the tool in a workpiece, ensure the blade is in the center of the saw mark.
• Use larger support panels to minimize shrinkage and rebound, especially for larger workpieces.
• Securely fasten the saw blade depth and angle adjustment locking rod.
• Exercise extreme caution when cutting in walls or blind areas, as protruding blades can cut into hidden objects and cause rebound.

1.2 Battery Safety

• Always remove the battery pack before changing accessories, performing maintenance, storing the tool, or when the tool is not in use.
• Do not attempt to charge a warm battery pack. Allow it to cool down to ambient temperature before charging.
• Never immerse the battery pack or charger in any liquid.
• Store battery packs out of reach of children.
• If a battery pack has not been used for a prolonged period, it may require a longer initial charge (protective charging).
• Avoid operating or charging the battery pack if its temperature is below 0°C or above 45°C, as this can lead to abnormal behavior or damage.

2. Product Overview

2.1 Components

Diagram illustrating the main components of the angle grinder, including the spindle lock, switch, detachable handle, cooling hole, non-slip handle, smart shift, lithium battery, and grinding sheet.

Detailed view highlighting key features such as the spindle lock, switch, lithium battery, vents, detachable handle, grinding sheet, battery level display, and brushless motor.

• Spindle Lock: For securing the grinding/cutting disc during installation and removal.
• Switch: Power on/off control.
• Cooling Hole/Vents: For heat dissipation during operation.
• Non-slip Handle: Provides a secure grip.
• Smart Shift: (Likely refers to speed adjustment mechanism).
• Detachable Handle: Can be attached to either side for user comfort.
• Grinding Sheet/Disc: The abrasive component for grinding or cutting.
• Lithium Battery: Provides power to the tool.
• Battery Level Display: Indicates the remaining battery charge.
• Brushless Motor: Efficient and powerful motor.

3. Specifications

4. Package Contents

4.1 Available Sets

Visual comparison of the different package options available for the angle grinder.

• No Battery Type:
  • 1 x Angle Grinder
  • 1 x Wrench Tool
  • 1 x User Manual
  • 1 x Carton Box
• 1 Battery Type:
  • 1 x Angle Grinder
  • 1 x Battery
  • 1 x Power Adapter
  • 1 x Wrench Tool
  • 1 x User Manual
  • 1 x Carton Box
• 2 Battery Type:
  • 1 x Angle Grinder
  • 2 x Batteries
  • 1 x Power Adapter
  • 1 x Wrench Tool
  • 1 x User Manual
  • 1 x Carton Box

Example of package contents for the 'No Battery Type' option.

5. Setup

5.1 Battery Installation

1. Align the battery pack with the battery slot on the tool.
2. Push the battery pack firmly into the slot until it clicks into place, indicating it is securely locked.
3. To remove the battery, press the release button (if present) and pull the battery pack out.

5.2 Handle Attachment

The angle grinder features a detachable handle for improved control and comfort.

1. Screw the handle into the designated threaded hole on either the left or right side of the grinder head, depending on your preference and handedness.
2. Tighten the handle securely to prevent movement during operation.

5.3 Protective Cover Adjustment

Ensure the protective cover is securely in place and adjusted to provide maximum shielding against sparks and debris during operation.

5.4 Grinding/Cutting Disc Installation

1. Press and hold the spindle lock button to prevent the spindle from rotating.
2. Use the provided wrench tool to unscrew and remove the upper tab (outer flange).
3. Place the desired grinding or cutting disc onto the spindle, ensuring it sits correctly on the inner flange.
4. Screw the upper tab back onto the spindle.
5. While still holding the spindle lock button, use the wrench to tighten the upper tab securely.
6. Verify that the disc is firmly seated and does not wobble.
7. Ensure that the grain of the grinding wheel is long enough to be properly inserted into the spindle.

6. Operation

6.1 Powering On/Off and Speed Control

• To start the tool, pull the trigger or slide the power switch to the 'ON' position. An LED indicator may light up when the tool is active.
• This tool features 4-gear speed adjustment. Adjust the speed according to the material and task.
• To stop the tool, release the trigger or slide the power switch to the 'OFF' position. The electric brake will stop the disc instantly.

6.2 Trigger Lock

To lock the trigger in the 'OFF' position for safety or storage, push the control switch to the center position. The trigger will not function when the control switch is locked.

6.3 Battery Level Indicator

The tool features a battery level display, typically a series of LED lights on the battery pack or tool body. Check these indicators to monitor the remaining battery charge during operation.

6.4 Working Techniques

Before actual workpiece operation, perform a trial run for at least 30 seconds at the highest idle speed in a safe, clear area to ensure proper function and balance.

• Metal Grinding:

  Image depicting the angle grinder in use for metal grinding, with sparks visible.

  Use appropriate grinding discs for the material. Apply steady, even pressure across the surface. Keep sparks directed away from yourself, others, and flammable materials.

• Metal Cutting:

  Image showing the angle grinder being used for cutting, generating dust.

  Install a suitable cutting disc. Ensure the workpiece is securely clamped to prevent movement. Maintain a firm grip and control the tool's movement along the cutting line.

• Stone Cutting:

  Image illustrating various working scenes, including stone cutting.

  Use appropriate diamond cutting discs for stone. Ensure stable footing and a firm grip. Follow all general safety precautions for cutting.

7. Maintenance

7.1 Cleaning

• After each use, clean the tool thoroughly to remove dust, debris, and residue.
• Use a clean, dry cloth for cleaning. Avoid using abrasive or solvent-based cleaning agents, as they can damage the tool's housing.
• Ensure that all air inlets and cooling vents are clear of obstructions to maintain proper airflow and prevent overheating.

7.2 Disc Replacement

• Regularly inspect grinding and cutting discs for signs of wear, cracks, chips, or other damage.
• Replace worn or damaged discs immediately to ensure safe and effective operation.
• Follow the disc installation instructions (Section 5.4) carefully when replacing discs.

7.3 Battery Care and Charging

• Plug the power adapter into an AC outlet.
• Insert the battery pack firmly into the power adapter/charger.
• During charging, the charging indicator lamp will typically light up (often red).
• Once charging is complete, the indicator lamp will change (e.g., turn green or flash quickly).
• If the battery pack is warm from recent use, charging may not begin immediately. Allow the battery to cool down before attempting to charge.
• If a battery pack has not been used for a long time, the charging lamp may flash slowly, indicating a protective charging cycle.
• Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.

8. Troubleshooting

8.1 Tool Not Starting or Operating Abnormally

• Check Battery: Ensure the battery pack is fully charged and securely inserted into the tool.
• Trigger Lock: Verify that the trigger lock is not engaged.
• Visible Damage: Inspect the tool for any visible damage or obstructions that might prevent operation.
• Abnormal Vibration/Swaying: If the tool vibrates or sways abnormally, immediately stop operation. Inspect for poor disc assembly or an unbalanced grinding wheel.

8.2 Disc Getting Stuck

• Immediately release the trigger and wait for the disc to come to a complete stop.
• Carefully use appropriate tools to widen the gap in the workpiece and gently remove the stuck disc. Do not force the disc.

8.3 Battery Abnormal/Temperature Issues

• If the charging indicator shows an error (e.g., flashing red and green) or indicates a temperature outside the normal range (below 0°C or above 45°C), allow the battery to reach a suitable ambient temperature before attempting to charge or use.

9. User Tips

• Battery Compatibility: This angle grinder is designed to be compatible with Makita 18V B-series lithium batteries (e.g., BL1830, BL1850, BL1840, BL1840B, BL1850B, BL1820B). It is NOT compatible with G-series batteries (e.g., BL1813G, BL1413G) or 18V Ni-CD batteries. Always verify battery compatibility before use.
• Speed Adjustment: Utilize the 4-gear speed adjustment feature to match the tool's speed to the specific material and task. Lower speeds are often better for precision work or softer materials, while higher speeds are suitable for aggressive grinding or cutting.
• Package Options: The product is available in different sets (No Battery, 1 Battery, 2 Batteries). Ensure you select the package that best suits your needs, especially if you already own compatible batteries or require multiple batteries for extended use.

10. Warranty and Support

For detailed warranty information, specific service procedures, and further technical support, please refer to the official user manual PDF. This document contains comprehensive information regarding your product's warranty coverage and how to obtain assistance.

You can access the full user manual PDF at: Gisam Angle Grinder User Manual (PDF)