1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your CHESTON 20MM 500W 850RPM Rotary Hammer Drill Machine. Please read this manual thoroughly before using the tool and keep it for future reference.
The CHESTON Rotary Hammer Drill is designed for drilling in concrete, masonry, wood, and metal, offering both rotary drilling and hammer drilling functions. Its robust 500W motor and 850 RPM speed ensure efficient performance for various tasks.
2. Safety Instructions
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury when operating power tools.
General Safety
- Wear appropriate personal protective equipment (PPE) such as safety glasses, hearing protection, and gloves.
- 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.
- Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
Electrical Safety
- Ensure the power tool plug matches the outlet. Never modify the plug.
- Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators.
- Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
- Do not abuse the cord. Never use the cord for carrying, pulling, or unplugging the power tool. Keep cord away from heat, oil, sharp edges, or moving parts.
Personal Safety
- Stay alert, watch what you are doing, and use common sense when operating a power tool.
- Do not use a power tool while you are tired or under the influence of drugs, alcohol, or medication.
- Use safety equipment. Always wear eye protection. Dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
- Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source, picking up or carrying the tool.
3. Product Overview and Components
Familiarize yourself with the parts of your CHESTON Rotary Hammer Drill for safe and efficient operation.
Image 1: The CHESTON Rotary Hammer Drill machine shown with its auxiliary handle, carrying case, and included drill bits (6mm, 8mm, 10mm).
Key Components:
- Chuck: SDS type, 20mm maximum size, for securely holding drill bits.
- Auxiliary Handle: Provides additional grip and control during operation.
- Mode Selector Switch: Allows selection between drilling and hammer drilling functions.
- Trigger Switch: Activates the drill.
- Lock-on Button: For continuous operation without holding the trigger.
- Depth Gauge: Used to set the desired drilling depth.
- Power Cord: Corded electric power supply.
Image 2: Close-up view highlighting the versatile 20mm chuck size, easy-to-carry BMX tool box, lock-on button, 1.3m cord length, and the included 6mm, 8mm, and 10mm drill bits.
4. Setup
Attaching the Auxiliary Handle
- Loosen the auxiliary handle by rotating it counter-clockwise.
- Slide the handle onto the front of the drill body.
- Adjust the handle to a comfortable and secure position.
- Tighten the handle by rotating it clockwise until it is firmly secured.
Inserting and Removing Drill Bits
- Ensure the drill is unplugged from the power source.
- Pull back the chuck collar.
- Insert the SDS drill bit into the chuck until it clicks into place. Tug on the bit to ensure it is securely seated.
- To remove, pull back the chuck collar and pull the drill bit out.
Setting the Depth Gauge
- Insert the depth gauge into the hole on the auxiliary handle.
- Adjust the depth gauge to the desired drilling depth.
- Tighten the auxiliary handle to secure the depth gauge in position.
5. Operating Instructions
Always ensure the work area is clear and you are wearing appropriate safety gear before starting operation.
Image 3: The CHESTON Rotary Hammer Drill being used, illustrating its powerful 500W motor, smooth 850RPM operation, efficient performance, hammer and drill functions, and anti-vibration technology.
Selecting Operating Mode
The CHESTON Rotary Hammer Drill features two primary operating modes: Drilling and Hammer Drilling. It also includes a reversible drill feature.
- Drilling Mode: For drilling in wood, metal, and plastics. Set the mode selector switch to the drill icon.
- Hammer Drilling Mode: For drilling in concrete and masonry. Set the mode selector switch to the hammer drill icon.
- Reversible Drill Feature: Allows the drill to rotate in reverse, useful for removing stuck drill bits or driving/removing screws (with appropriate accessories).
Starting and Stopping
- To start the drill, press the trigger switch.
- For continuous operation, press the lock-on button while the trigger is pressed. Release the trigger to disengage the lock-on function.
- To stop the drill, release the trigger switch. If the lock-on button is engaged, press the trigger again to release it.
Drilling Tips
- Always secure your workpiece to prevent movement during drilling.
- Apply steady, even pressure. Do not force the drill.
- For deep holes, periodically withdraw the drill bit to clear debris.
- When drilling metal, use cutting oil to prolong bit life and improve cutting efficiency.
Image 4: Examples of the drill's versatility, including concrete or wood drilling, masonry drilling and hammering, driving plug fasteners and screws, and general construction tasks.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your rotary hammer drill.
- Cleaning: After each use, clean the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. Keep ventilation openings clear of dust and debris.
- Lubrication: Periodically apply a small amount of appropriate grease to the chuck mechanism to ensure smooth operation.
- Cord Inspection: Regularly inspect the power cord for any signs of damage, cuts, or fraying. Replace damaged cords immediately.
- Storage: Store the drill and its accessories in the provided BMX tool box in a dry, secure place, away from children.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Drill does not start | No power supply; Damaged power cord; Faulty switch | Check power outlet and connections; Inspect power cord for damage; Contact customer support for switch replacement. |
| Reduced drilling performance | Worn or dull drill bit; Incorrect mode selected; Overheating | Replace drill bit; Ensure correct mode (Drilling/Hammer Drilling) is selected; Allow tool to cool down. |
| Excessive vibration | Loose drill bit; Damaged internal components | Ensure drill bit is securely seated; Discontinue use and contact customer support. |
| Smoke or unusual smell | Motor overheating; Internal electrical fault | Immediately unplug the tool. Discontinue use and contact customer support. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | CHESTON |
| Model Number | 20mm Rotary Hammer Drill |
| Power Source | Corded Electric |
| Maximum Power | 500 Watts |
| Voltage | 240 Volts |
| Amperage | 1.9 Amps |
| Maximum Rotational Speed | 850 RPM |
| Maximum Chuck Size | 20mm (0.8 Inches) |
| Drilling Capacity (Concrete) | 20mm |
| Drilling Capacity (Wood) | 30mm |
| Drilling Capacity (Metal) | 13mm |
| Item Weight | 2.5 kg (2500 Grams) |
| Product Dimensions | 30L x 10W x 30H Centimeters |
| Included Components | Rotary Hammer Drill, Auxillary Handle, Carrying Case, 6mm, 8mm, 10mm Drill Bits, Depth Gauge |
9. Warranty and Support
Your CHESTON Rotary Hammer Drill Machine comes with a 6 Months Manufacturing Warranty from the date of purchase.
For any queries, technical assistance, or warranty claims, please contact our customer care. Details can be found on the product packaging or the official CHESTON website.
You can also reach out to the manufacturer at the contact information provided in the product details:
- Manufacturer: Cheston, YONGKANG GREENPOWER TRADING CO.,LTD.
- Address: NO. 701, 7TH FLOOR, JINBI MANSION, HEADQUARTERS CONTER, YONGKANG CITY, ZHEJIANG, CHINA
- Phone: +86-579-87277620
