1. Introduction
Thank you for choosing the CONENTOOL NBT-RH-26A 1400W Electric Rotary Hammer Drill. This powerful and versatile tool is designed for heavy-duty applications such as concrete breaking, chiseling, and drilling through tough materials like brick walls and granite. Featuring a robust 1400W motor, 3.2J super impact force, and dual-gear intelligent switching, it provides efficient and precise performance for various construction needs. This manual provides essential information for safe operation, proper setup, maintenance, and troubleshooting to ensure optimal performance and longevity of your tool.
Figure 1: CONENTOOL Rotary Hammer Drill and included accessories.
2. Safety Instructions
Always prioritize safety when operating power tools. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.
- Work Area Safety: Keep your 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.
- Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Avoid body contact with earthed or grounded surfaces. Do not expose power tools to rain or wet conditions.
- Personal Safety: Always wear appropriate personal protective equipment (PPE), including safety glasses, hearing protection, and industrial gloves. Use a dust guard to prevent dust from entering your eyes and ensure safety at work.
- 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.
- Maintenance: Keep cutting tools sharp and clean. 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.
Figure 2: Always use a dust guard and appropriate PPE during operation.
3. Package Contents
Upon opening your CONENTOOL Rotary Hammer Drill package, please verify that all the following items are included:
- 1 x Electric Hammer Drill
- 1 x Plastic Carrying Case
- 1 x Hammer Chisel
- 1 x Pointed Chisel
- 4 x Drill Bits (various sizes)
- 1 x Pair of Industrial Mittens
- 1 x User Manual
- 1 x Dust Guard
- 2 x Carbon Brushes (spare set)
- 3 x Drill Chucks (including quick-fit adapter)
Figure 3: All components included in the package.
4. Specifications
| Feature | Specification |
|---|---|
| Brand | CONENTOOL |
| Model | NBT-RH-26A |
| Power | 1400W |
| No-load Speed | 0-1000 r/min |
| Power Voltage | 220V 50/60Hz |
| Hammering Times | 3300 times/minute |
| Impact Frequency | 4400 Bpm |
| Impact Force | 3.2J |
| Chuck Diameter | 26mm |
| Max. Drilling Diameter | 26mm |
| Weight | 6kg |
| Power Source | AC |
| Use | Commercial Manufacture |
| Certification | CE, WEEE |
| Bit Sizes (Square Shank Four Pit Drill) | 6, 8, 10, 12 + 150mm |
| Chisel Sizes (Square Shank) | 1*15*250mm (pointed), 1*15*250mm (flat) |
| Packing | Plastic box |
Figure 4: Product dimensions and detailed specifications.
5. Setup
5.1 Attaching the Drill Bit/Chisel
Follow these steps to securely attach a drill bit or chisel:
- Ensure the tool is unplugged from the power source.
- Pull back the chuck collar and insert the SDS-plus shank of the drill bit or chisel into the chuck.
- Rotate the bit slightly until it clicks into place. Release the collar.
- Pull on the bit to ensure it is securely locked. There should be a small amount of play, which is normal for SDS-plus systems.
Figure 5: Step-by-step guide for drill clamp mounting.
5.2 Adjusting the Auxiliary Handle
The auxiliary handle can be rotated 360 degrees for optimal control and comfort during operation. Loosen the handle, adjust it to your desired position, and then tighten it securely.
Figure 6: The auxiliary handle can be rotated 360 degrees for ergonomic use.
5.3 Installing the Dust Guard
Attach the dust guard to the drill bit to minimize dust exposure during drilling, protecting your eyes and maintaining a cleaner work environment.
6. Operating Instructions
The CONENTOOL Rotary Hammer Drill offers dual-gear intelligent switching to adapt to various tasks.
6.1 Mode Selection
- First Gear (Drilling Mode): Ideal for precise drilling tasks, offering a no-load speed of 1000 r/min.
- Second Gear (Hammering/Grooving Mode): Provides powerful impact force (3.2J, 4400 Bpm) for chiseling, concrete breaking, and grooving.
Use the fast switching mechanism to select the appropriate mode for your application.
6.2 Applications
- Brick Wall Drilling: Use the drilling mode with appropriate drill bits for fast and accurate holes.
- Concrete Grooving: Switch to hammering mode for efficient grooving, increasing depth efficiency by up to 50%.
- Granite Operation: Combine special drill bits with high-frequency impact in hammering mode to easily handle hard stone.
Figure 7: The rotary hammer drill is suitable for various heavy-duty tasks including drilling, chiseling, and breaking.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your rotary hammer drill.
- Cleaning: After each use, clean the tool thoroughly. Remove dust and debris from the air vents and chuck area.
- Carbon Brush Replacement: The tool includes a spare set of carbon brushes. Replace worn carbon brushes promptly to maintain motor efficiency and prevent damage. Refer to the tool's diagram for access to the carbon brush compartments.
- Lubrication: Periodically check and lubricate the chuck mechanism as per manufacturer recommendations to ensure smooth bit changes and operation.
- Anti-Leakage Cap: Ensure the anti-leakage cap is properly seated to prevent internal component exposure.
- Storage: Store the tool in its plastic carrying case in a dry, secure location, away from children and unauthorized users.
8. Troubleshooting
If you encounter issues with your rotary hammer drill, refer to the following common troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | No power supply; Faulty power cord/plug; Worn carbon brushes | Check power connection; Inspect cord/plug for damage; Replace carbon brushes |
| Reduced power/performance | Worn carbon brushes; Overheating; Incorrect mode selection | Replace carbon brushes; Allow tool to cool down; Ensure correct mode is selected |
| Bit not locking in chuck | Chuck collar not fully pulled back; Debris in chuck; Damaged chuck | Ensure collar is fully retracted; Clean chuck thoroughly; Contact support for chuck replacement |
| Excessive vibration | Loose auxiliary handle; Worn bit; Internal component issue | Tighten auxiliary handle; Replace worn bit; Contact support if issue persists |
9. User Tips
- For optimal performance and safety, always select the correct drill bit or chisel for the material you are working on.
- When drilling into hard materials like concrete or granite, apply steady, even pressure. Let the tool do the work; excessive force can lead to overheating and reduced efficiency.
- Periodically check the condition of your drill bits and chisels. Sharp accessories improve performance and reduce strain on the tool.
- Take short breaks during prolonged use to prevent the tool from overheating and to ensure consistent performance.
10. Warranty and Support
For any issues not covered in this manual, or for warranty claims, please contact your retailer or the CONENTOOL customer support. Keep your purchase receipt as proof of purchase for warranty purposes. Do not attempt to repair the tool yourself, as this may void the warranty and pose a safety risk.
