DEWINNER 1-1/4" Rotary Hammer Drill (Model DE-T032MB) Instruction Manual

1. Important Safety Instructions

Always observe basic safety precautions when operating power tools to reduce the risk of fire, electric shock, and personal injury. Read all instructions carefully before use.

General Power Tool Safety Warnings

• 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. Do not use any adapter plugs with earthed (grounded) power tools. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators.
• Personal Safety: Always wear eye protection. Use hearing protection when operating the tool for extended periods. Wear a dust mask if working in dusty conditions. Dress properly; do not wear loose clothing or jewelry. Keep hair, clothing, and gloves away from moving parts.
• 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.
• Service: Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.

Figure 1: The mechanical safety clutch helps prevent sudden kickback, protecting the user from injury.

2. Product Overview

The DEWINNER 1-1/4" Rotary Hammer Drill (Model DE-T032MB) is a versatile and powerful tool designed for drilling, hammer drilling, and chiseling tasks in various materials. It features a robust 1500W motor, SDS Plus chuck system, and multiple safety and comfort features.

Components and Features

Figure 2: Main components of the rotary hammer drill and accessories.

• SDS Plus Chuck: Allows for quick and secure bit changes without additional tools. The design ensures bits are held firmly during operation.
• 360° Auxiliary Handle: Provides enhanced control and comfort, adjustable to various operating angles for optimal grip.
• Function Selector: A knob to switch between drilling, hammer drilling, chiseling, and chisel rotation modes.
• Speed Regulator: Adjusts the operating speed for different applications and materials.
• Oil Cap: Provides access for lubrication to maintain internal components.
• Heat Outlet: Designed for efficient heat dissipation to protect the motor during prolonged use.
• Shock Absorber: An anti-shock structure integrated to reduce hand vibrations, improving user comfort and control.

Figure 3: SDS Plus chuck for secure bit retention and integrated shock absorber for vibration control.

Figure 4: Adjustable auxiliary handle and heat outlet for motor protection.

3. Package Contents

Verify that all items are present upon unpacking:

• DEWINNER 1-1/4" Rotary Hammer Drill (Model DE-T032MB)
• Auxiliary Handle
• Dust Cover
• Oil Cap Wrench
• Pair of Carbon Brushes
• Flat Chisel (14x250mm)
• Sharp Chisel (14x250mm)
• Drill Bits (8mm, 10mm, 12mm x 150mm)
• Carrying Case
• Advanced Lubricant

Figure 5: The complete set of the rotary hammer drill and its accessories.

4. Setup and Assembly

Attaching the Auxiliary Handle

1. Loosen the auxiliary handle by rotating it counter-clockwise.
2. Slide the handle onto the front barrel of the drill.
3. Adjust the handle to a comfortable and secure position.
4. Tighten the handle by rotating it clockwise until it is firmly secured.

Inserting and Removing SDS Plus Bits

1. To Insert: Clean the bit shank and apply a small amount of grease. Pull back the chuck collar, insert the bit into the chuck until it clicks into place, then release the collar. Pull on the bit to ensure it is securely locked.
2. To Remove: Pull back the chuck collar firmly and pull the bit out of the chuck.

5. Operating Instructions

Ensure the tool is properly set up and all safety precautions are followed before operation.

Function Selection

The rotary hammer drill offers four operating modes, selected via the function knob:

• Drilling Mode (Drill Only): For drilling in wood, metal, and plastic without hammer action.
• Hammer Drilling Mode (Hammer & Drilling): For drilling in concrete, masonry, and stone with both rotation and hammer action.
• Chiseling Mode (Chiselling): For light demolition work, chipping, and chiseling in concrete and masonry without rotation.
• Chisel Rotation Mode (Chisel Rotation): Allows for adjusting the chisel angle without hammer action, then locking it into position for chiseling.

Figure 6: The four selectable operating modes of the drill.

Powering On and Speed Control

1. Connect the power cord to a suitable power outlet.
2. Set the desired function mode using the selector knob.
3. Press the power switch to start the tool. The speed can be adjusted using the speed regulator dial, offering up to 6 variable speeds.
4. Release the power switch to stop the tool.

Figure 7: The drill in operation, demonstrating its power and variable speed control.

Operating Tips

• Apply steady, firm pressure. Do not lean heavily on the tool; let the hammer action do the work.
• For hammer drilling, ensure the bit is sharp and appropriate for the material.
• When chiseling, use the chisel rotation mode to orient the chisel correctly before engaging hammer action.

Figure 8: The drill delivering powerful impact energy for efficient material removal.

6. Maintenance

Regular maintenance ensures optimal performance and extends the lifespan of your tool. Always disconnect the power plug before performing any maintenance.

Cleaning

• After each use, clean the tool's ventilation slots and housing with a soft brush or compressed air.
• Wipe the chuck and bit shank with a clean cloth to remove dust and debris.
• Do not use water or chemical cleaning agents.

Lubrication

The tool requires periodic lubrication. Check the oil level via the oil cap and replenish as needed using the provided advanced lubricant or equivalent.

1. Unscrew the oil cap using the oil cap wrench.
2. Check the oil level. If low, add lubricant until the appropriate level is reached.
3. Securely replace the oil cap.

Figure 9: The oil-proof cap for easy access to the lubrication reservoir.

Carbon Brush Replacement

Carbon brushes are wear parts and should be replaced when they become worn. Refer to a qualified service technician for carbon brush replacement if you are unsure.

7. Troubleshooting

If you encounter issues with your DEWINNER Rotary Hammer Drill, refer to the following common problems and solutions:

8. Specifications

Technical data for the DEWINNER 1-1/4" Rotary Hammer Drill (Model DE-T032MB):

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation included with your purchase or contact DEWINNER customer service. You may also visit the official DEWINNER store for more information: DEWINNER Store.