DEWALT 6 Inch Bench Grinder (DW756) Instruction Manual

1. Introduction

The DEWALT DW756 6-inch Bench Grinder is designed for heavy-duty grinding operations, including sharpening tools, deburring, rust removal, shaping parts, and cleaning objects. It features a powerful 5/8 HP induction motor that operates at 3,450 RPM for efficient material removal. The robust construction, including an industrial cast iron base and motor housing, ensures durability and extended product life. This manual provides essential information for the safe and effective use of your bench grinder.

Figure 1: DEWALT DW756 6-inch Bench Grinder, a robust tool for various grinding tasks.

2. Safety Information

WARNING: To reduce the risk of injury, always read and understand the instruction manual before operating this tool.

• Always use appropriate personal protective equipment, including eye protection (safety glasses or goggles) and respiratory protection.
• Ensure all guards and tool rests are properly installed and adjusted before use.
• Securely bolt the bench grinder to a stable workbench or stand to prevent movement during operation.
• Do not expose the grinder to rain or use it in damp or wet locations.
• Use abrasive wheels that are suitable for 3600 RPM or higher.
• Keep the work area clean and well-lit.
• Ensure the power switch is in the OFF position before plugging in or unplugging the tool.

3. Package Contents

Your DEWALT DW756 6-inch Bench Grinder package should include the following items:

• DEWALT DW756 6-inch Bench Grinder unit
• One 36-grit grinding wheel
• One 60-grit grinding wheel
• Two eye shields
• Two spark deflectors
• Two adjustable tool rests
• Operating instructions manual

4. Setup

4.1 Mounting the Grinder

The DEWALT DW756 features an industrial cast iron base designed for stability. It is crucial to bolt the grinder securely to a sturdy workbench or a dedicated stand before use. While the manual may provide a template, it is often more accurate to use the actual base of the tool to mark and drill mounting holes. Ensure the mounting bolts are appropriate for your workbench thickness and provide a secure fit without overtightening, allowing the rubber feet to absorb vibration.

4.2 Installing Tool Rests

Attach the precision-machined aluminum tool rests to the grinder. These rests are essential for accurately positioning your work against the grinding wheels. Adjust them so that they are close to the grinding wheel but not touching, maintaining a small, consistent gap to prevent workpieces from getting caught.

4.3 Attaching Eye Shields and Spark Deflectors

Install the eye shields and spark deflectors. These components are critical for user safety, protecting against flying debris and sparks during operation. Ensure they are securely fastened and positioned to provide maximum protection. The plastic guards, while identical, may require careful orientation to ensure proper fit and function.

Figure 2: Bench grinder showing overall dimensions and components for setup.

5. Operation

5.1 Powering On/Off

Ensure the grinder is securely mounted and all safety components are in place. Plug the power cord into a compatible 120V AC outlet. The grinder is equipped with a simple ON/OFF switch located on the front base. To start, flip the switch to the 'ON' position. To stop, flip the switch to the 'OFF' position. Allow the wheels to come to a complete stop before leaving the machine unattended.

5.2 Grinding Techniques

The DW756 comes with two grinding wheels: a 36-grit wheel for coarse material removal and a 60-grit wheel for finer work. Utilize the adjustable tool rests to support your workpiece firmly and guide it against the rotating wheel. Apply light, consistent pressure. Avoid excessive force, which can overheat the workpiece, damage the wheel, or cause kickback. The 12-1/2-inch distance between wheels accommodates longer and larger grinding applications.

5.3 Using the Wheels

• 36-Grit Wheel: Ideal for aggressive material removal, shaping, and initial sharpening of dull tools.
• 60-Grit Wheel: Suitable for finer sharpening, deburring, and finishing tasks.

Always ensure the workpiece is presented to the wheel at the correct angle for the desired result. The rear exhaust ports in the wheel guards contribute to smoother operation by directing debris away.

6. Maintenance

Regular maintenance ensures the longevity and safe operation of your DEWALT DW756 Bench Grinder.

• Cleaning: Regularly clean the grinder and surrounding work area to remove dust and debris. Ensure the motor housing vents are clear for proper cooling.
• Wheel Inspection: Periodically inspect grinding wheels for wear, cracks, or damage. Replace worn or damaged wheels immediately. Ensure replacement wheels are rated for the grinder's RPM.
• Tool Rest Adjustment: Keep tool rests adjusted close to the grinding wheels (approximately 1/16 inch or 1.5 mm) to prevent workpieces from jamming.
• Eye Shield Condition: Check eye shields for clarity and damage. Replace if visibility is impaired or if they are cracked.

7. Troubleshooting

If you encounter issues with your DEWALT DW756 Bench Grinder, consider the following:

• Excessive Vibration: Ensure the grinder is securely bolted to a stable surface. Check that grinding wheels are properly balanced and mounted. If vibration persists, inspect wheels for damage or uneven wear.
• Sparks Not Contained: Verify that spark deflectors and eye shields are correctly installed and adjusted. While designed to minimize sparks, some may escape. Always wear eye protection.
• Power Issues: Confirm the grinder is plugged into a functional 120V AC outlet. Check the power switch for proper operation. If the unit does not power on, ensure there are no tripped circuit breakers.
• Slow or Weak Grinding: This may indicate a worn or glazed grinding wheel. Dress the wheel with a wheel dresser or replace it if necessary. Ensure the motor is receiving adequate power.

8. Specifications

9. Warranty and Support

The DEWALT DW756 6-inch Bench Grinder is backed by a three-year limited warranty, covering any defects due to faulty materials or workmanship from the date of purchase. Additionally, it includes a one-year free service contract, where DEWALT will maintain the tool and replace worn parts caused by normal use at no charge. For warranty claims or technical support, please refer to the contact information provided in your product packaging or visit the official DEWALT website.

For service information, you may also call 1-800-4-DEWALT.