WORKPRO Premium 1-1/4 Inch SDS-Plus Rotary Hammer Drill User Manual

1. Introduction

Thank you for choosing the WORKPRO Premium 1-1/4 Inch SDS-Plus Rotary Hammer Drill. This powerful and versatile tool is designed for demanding tasks such as drilling in concrete, masonry, and wood, as well as light chipping and demolition work. This manual provides essential information for safe operation, proper maintenance, and effective use of your new rotary hammer drill. Please read it thoroughly before first use and keep it for future reference.

2. Product Overview

The WORKPRO 7.5AMP SDS-Plus Rotary Hammer Drill is engineered for professional-grade performance and durability. It features a robust design capable of withstanding a 1-meter drop test without functional issues, ensuring reliability on the job site. Its lightweight construction (7.5 lbs) makes it suitable for various working positions.

WORKPRO SDS-Plus Rotary Hammer Drill with included accessories — Figure 2.1: WORKPRO Rotary Hammer Drill and included accessories, including 5 SDS-Plus bits, a carrying case, replaceable carbon brushes, and a dust collector.

Key Features:

4 Functions: Hammer Drilling, Hammer, Drilling, and Chisel Adjust for versatile applications.
SDS-Plus Chuck: Allows for quick and secure bit changes.
7.5 AMP High Performance Motor: Delivers up to 1150 RPM no-load speed and 5100 BPM max impact frequency.
360° Rotatable Handle: Provides optimal control and comfort in various working angles.
Variable Speed Control: With a lock-on button for continuous operation.
Depth Gauge: Detachable for precise drilling depth control.
Shock Absorber: Reduces vibration for improved user comfort.
Replaceable Carbon Brush: For extended tool lifespan.
Dust Collector: Helps maintain a cleaner work environment.

Diagram of WORKPRO Rotary Hammer Drill with labeled parts — Figure 2.2: Labeled components of the rotary hammer drill, including SDS-Plus Chuck, Four Functions Switch, On/Off Switch, Lock-on Button, Depth Gauge, 360° Rotatable Handle, Variable Speed Control, Cushioned Handle, Heat Outlet, and Shock Absorber.

WORKPRO Rotary Hammer Drill with dimensions and drop test information — Figure 2.3: The drill measures approximately 15 inches in length and 8.8 inches in height, designed for professional use and tested to pass a 1-meter drop test.

3. Setup

Before operating the rotary hammer drill, ensure all components are properly assembled and secured.

3.1 Attaching the 360° Rotatable Handle

Loosen the handle clamp by rotating it counter-clockwise.
Slide the handle onto the front barrel of the drill.
Adjust the handle to your desired position for optimal comfort and control.
Tighten the handle clamp by rotating it clockwise until it is securely fastened.

3.2 Installing the Depth Gauge

Insert the depth gauge into the hole on the handle clamp.
Adjust the depth gauge to the desired drilling depth by sliding it in or out.
Ensure the depth gauge is securely positioned before drilling.

3.3 Inserting SDS-Plus Bits

Clean the shank of the SDS-Plus bit.
Pull back the SDS-Plus chuck collar.
Insert the bit into the chuck until it clicks into place.
Release the collar. Pull on the bit to ensure it is locked. A slight back-and-forth movement is normal for SDS-Plus systems.

Close-up images showing SDS-Plus chuck, depth gauge, 360 rotatable handle, and shock absorber — Figure 3.1: Detailed views of the auto-lock SDS-Plus chuck, detachable depth gauge, 360° rotatable handle, and the vibration-absorbing cushioned handle.

4. Operating Instructions

The WORKPRO Rotary Hammer Drill offers four distinct operating modes, selected via the function switch. Always ensure the tool is unplugged when changing modes or bits.

4.1 Function Selection

Rotate the four-function switch located on the side of the drill to select the desired mode:

Hammer Drilling: For drilling into concrete, brick, and masonry. Combines rotation and hammering action.
Hammer (Chipping): For light demolition, chiseling, and breaking concrete or tile. Hammering action only, no rotation.
Drilling: For drilling into wood, metal, and plastic. Rotation only, no hammering action.
Chisel Adjust: Allows for adjusting the angle of the chisel bit without hammering or rotation.

Images demonstrating the four functions of the rotary hammer drill — Figure 4.1: Visual representation of the four operating modes: Hammer Drilling, Hammer, Drilling, and Chisel Adjust.

4.2 Power On/Off and Speed Control

To Start: Press the On/Off switch (trigger).
To Stop: Release the On/Off switch.
Variable Speed: The speed is controlled by the pressure applied to the On/Off switch. Pressing lightly results in lower speed, while pressing fully increases the speed.
Lock-on Button: For continuous operation, press the On/Off switch fully and then press the lock-on button. To release, press the On/Off switch again.

4.3 Applications

This rotary hammer drill is suitable for a variety of applications:

Chiseling concrete for minor demolition.
Removing old floor or wall tiles.
Drilling holes in concrete for anchors or rebar.
Breaking up small sections of concrete flooring.

Images showing the rotary hammer drill in various applications: chiseling concrete, removing tiles, concrete drilling, and floor breaking. — Figure 4.2: Examples of the rotary hammer drill's applications, including chiseling concrete, removing tiles, concrete drilling, and floor breaking.

5. Maintenance

Regular maintenance ensures the longevity and optimal performance of your WORKPRO Rotary Hammer Drill.

5.1 Cleaning

Always unplug the tool before cleaning.
Wipe down the tool with a clean, damp cloth after each use. Do not use harsh chemicals or abrasive cleaners.
Clear any dust or debris from the ventilation openings to prevent overheating.
Clean the SDS-Plus chuck regularly to ensure smooth bit insertion and removal.

5.2 Carbon Brush Replacement

The carbon brushes are wear parts and should be inspected periodically. Replace them when they are worn down to approximately 1/4 inch (6mm) or if the motor sparks excessively.

Unplug the tool from the power source.
Locate the brush caps on the sides of the motor housing.
Unscrew the brush caps using a flathead screwdriver.
Remove the old carbon brushes.
Insert new carbon brushes, ensuring they are oriented correctly.
Screw the brush caps back on securely.

5.3 Storage

Store the tool in its original carrying case in a dry, secure location, away from direct sunlight and extreme temperatures.

6. Troubleshooting

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

Problem	Possible Cause	Solution
Tool does not start	No power supply; Faulty power cord/plug; Worn carbon brushes	Check power outlet/circuit breaker; 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 function mode is selected.
Bit not holding in chuck	Chuck not fully engaged; Damaged bit shank; Dirty chuck	Ensure bit is fully inserted and collar is released; Use undamaged bits; Clean chuck thoroughly.
Excessive sparking from motor	Worn carbon brushes; Dirty commutator	Replace carbon brushes; Have the tool serviced by a qualified technician to clean the commutator.

If the problem persists after attempting these solutions, please contact WORKPRO customer support.

7. Specifications

Detailed technical specifications for the WORKPRO Premium 1-1/4 Inch SDS-Plus Rotary Hammer Drill (7.5AMP).

Close-up of the 7.5 AMP high performance motor and drilling capacity details — Figure 7.1: The drill features a 7.5 AMP motor, capable of 0-1150 RPM and 0-5100 BPM. Max drilling capacity is 1 inch for concrete, 1/2 inch for steel, and 1-5/8 inches for wood.

Specification	Value
Model Number	W125173A
Power Source	Corded Electric
Voltage	120 Volts (AC)
Amperage	7.5 Amps
Maximum Rotational Speed	1150 RPM
Maximum Impact Frequency	5100 BPM
Drilling Capacity (Concrete)	1 inch
Drilling Capacity (Steel)	1/2 inch
Drilling Capacity (Wood)	1-5/8 inches
Item Weight	7.72 Pounds
Product Dimensions	15.35"L x 3.93"W x 9.05"H
Chuck Type	SDS-Plus

8. Warranty & Support

WORKPRO is committed to providing quality products and excellent customer support. Your rotary hammer drill is backed by our commitment to quality and long-term support.

For any questions regarding the product, technical assistance, or warranty claims, please contact WORKPRO customer service. We aim to reply to all inquiries as soon as possible, typically within 24 hours.

Please retain your proof of purchase for warranty purposes.

You can visit the official WORKPRO store for more information and products: WORKPRO Store

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WORKPRO W125173A