1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your GRAPHITE 58G874 Rotary Hammer. Please read this manual thoroughly before using the tool to ensure proper handling and to prevent injury or damage.
The GRAPHITE 58G874 is a versatile percussion hammer and demolition tool designed for demanding tasks such as drilling in concrete and chiseling. It features a powerful 1250W motor, 10J impact energy, and an SDS-Max chuck system for efficient bit changes.
2. Safety Instructions
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury.
- Work Area Safety: Keep your work area clean and well-lit. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Avoid body contact with earthed or grounded surfaces.
- Personal Safety: Always wear eye protection. Use hearing protection when operating the tool. Wear a dust mask if operations create dust. Dress properly; do not wear loose clothing or jewelry.
- Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the plug from the power source before making any adjustments, changing accessories, or storing power tools.
- Specific Rotary Hammer Safety: Hold the tool firmly with both hands. Be aware of hidden wiring or pipes when drilling into walls. The tool can generate significant torque.
3. Product Components
Figure 3.1: The Graphite 58G874 Rotary Hammer, showcasing its robust design and SDS-Max chuck.
Figure 3.2: The rotary hammer removed from its case, displaying the attached power cord and auxiliary handle.
Figure 3.3: The Graphite 58G874 Rotary Hammer and its accessories neatly stored within the durable carrying case.
Figure 3.4: The product packaging for the Graphite 58G874, highlighting key features and warranty information.
4. Setup
4.1 Unpacking
Carefully remove the rotary hammer and all accessories from the carrying case. Check for any signs of damage during transit. Retain the packaging for future storage or transport.
4.2 Attaching the Auxiliary Handle
The auxiliary handle provides additional control and stability during operation. Loosen the handle clamp, slide the handle onto the tool's neck, and tighten the clamp securely in a comfortable position.
4.3 Inserting SDS-Max Bits
- Clean the shank of the drill bit or chisel.
- Apply a small amount of lubricant to the bit shank.
- Insert the bit into the SDS-Max chuck, pushing it firmly until it clicks into place. Pull on the bit to ensure it is securely locked.
- To remove, pull back the chuck collar and pull the bit out.
5. Operating Instructions
5.1 Power Connection
Ensure the tool's power switch is in the OFF position before plugging the 3-meter power cable into a suitable 230V power outlet.
5.2 Mode Selection
The Graphite 58G874 typically offers multiple operating modes (e.g., rotary hammer drilling, chiseling). Refer to the mode selector switch on the tool and set it to the desired function for your task.
5.3 Starting and Stopping
To start the tool, press the trigger switch. To stop, release the trigger switch. Some models may have a lock-on button for continuous operation; press the trigger fully and then press the lock-on button. To release, press the trigger again.
5.4 Operation Tips
- Apply steady, firm pressure. Do not lean into the tool excessively; let the hammer mechanism do the work.
- For chiseling, position the chisel at the desired angle and activate the tool.
- When drilling, ensure the drill bit is perpendicular to the surface.
Figure 5.1: The Graphite 58G874 in action, demonstrating its capability for demolition tasks on concrete.
6. Maintenance
6.1 Cleaning
After each use, clean the tool's exterior with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. Keep ventilation openings clear of dust and debris.
6.2 Lubrication
The Graphite 58G874 features easy access to the impact mechanism lubrication. Periodically check the lubricant level and replenish as needed using the provided lubricant reservoir. Refer to the tool's diagram for the lubrication port location.
6.3 Storage
Store the tool in its original carrying case in a dry, secure location, out of reach of children and away from direct sunlight or extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | No power supply; Faulty power cord/plug; Damaged switch | Check power outlet; Inspect cord/plug for damage; Contact service center if switch is faulty. |
| Reduced impact power | Insufficient lubrication; Worn carbon brushes; Internal mechanism issue | Check and replenish lubricant; Have carbon brushes inspected/replaced by service; Contact service center. |
| Excessive vibration/noise | Loose components; Worn bearings; Damaged bit | Check for loose parts; Replace worn bit; Contact service center for internal issues. |
| Bit not locking in chuck | Dirty bit shank; Damaged chuck; Incorrect bit type | Clean bit shank; Ensure SDS-Max bit is used; Contact service center if chuck is damaged. |
If you encounter problems not listed here or if the suggested solutions do not resolve the issue, please contact an authorized GRAPHITE service center.
8. Specifications
| Specification | Value |
|---|---|
| Model Number | 58G874 |
| Manufacturer | Graphite |
| Power Type | Corded Electric |
| Voltage | 230 Volts |
| Power | 1250 Watts |
| Max Power | 1250 Watt |
| Impact Rate | 2800 min-1 |
| Impact Energy | 10 J |
| Drilling Diameter in Concrete | 40 mm |
| Cable Length | 3 m |
| Chuck Type | SDS-Max |
| Product Dimensions (L x W x H) | 48 x 31 x 12 cm |
| Item Weight | 7.3 Kilograms |
| Included Accessories | Flat Chisel, Pointed Chisel, 3 Drill Bits, Lubricant Reservoir, Carrying Case |
9. Warranty and Support
The GRAPHITE 58G874 Rotary Hammer comes with a 3-Year Warranty, ensuring peace of mind regarding its quality and durability.
Figure 9.1: The 3-Year Warranty emblem, signifying product reliability.
For warranty claims, technical support, or spare parts, please refer to the contact information provided with your purchase or visit the official GRAPHITE website. Always use genuine GRAPHITE spare parts for repairs to maintain product performance and warranty validity.
