DeWalt DW840 7″ Medium Angle Grinder

The DeWalt DW840 7-inch Medium Angle Grinder is a powerful and versatile tool designed for industrial-level grinding. Powered by a robust 13.0 Amp AC/DC motor that delivers a maximum speed of 8,000 RPM, this grinder is ideal for handling demanding 7-inch grinding applications. The keyless adjustable guard ensures ease of use, allowing tool-free adjustments while the rear handle design enhances comfort and control during operation. Additional features include external brush caps for convenient servicing, sealed ball and roller bearings for extended motor life, and a spindle lock button that enables quick and easy tool changes. Perfect for professionals who need reliable, high-performance tools, the DW840 is designed to withstand heavy usage with minimal maintenance.

Detailed Comparison: DeWalt DW840 7″ Angle Grinder

Key Features

• Motor Power and Speed:
  • 13.0 Amp motor with 8,000 RPM, delivering ample power for high-demand grinding applications.
• Ergonomic Design:
  • The rear handle design ensures greater comfort and control, even during extended use.
• Durability:
  • External brush caps simplify maintenance, while sealed ball and roller bearings extend the lifespan of the motor.
• Tool-Free Guard Adjustments:
  • The keyless adjustable guard allows for quick adjustments without needing any extra tools.
• Safety Features:
  • Includes a Type 27 7-inch guard for added protection during use.
• Spindle Lock:
  • Quick and easy tool changes with the integrated spindle lock button.

Pros and Cons

Pros:

• High Power: 13 Amp motor ensures the tool can handle tough grinding tasks with ease.
• Durability: Sealed bearings and external brush caps prolong the life of the motor.
• Ease of Use: Tool-free guard adjustments and a comfortable rear handle design.
• Efficiency: The high power-to-weight ratio reduces fatigue during prolonged use.
• Versatile: Includes several accessories like a grinding wheel, wrench, backing flange, clamp nut, and a 2-position side handle.

Cons:

• No Variable Speed: Lacks variable speed control, which may be a limitation for certain applications.
• No Case Included: The product does not come with a storage case, requiring separate purchase for safe storage.
• Corded: While this ensures constant power, it may limit mobility compared to cordless models.

Specification Comparison

Key Features of the DeWalt DW840 7″ Angle Grinder

• Powerful 13.0 Amp Motor: For high-speed grinding tasks.
• Spindle Lock Button: Quick, single-wrench bit changes.
• Keyless Adjustable Guard: Easy, tool-free adjustments for added convenience.
• Ergonomic Rear Handle: Designed for comfort and greater control during use.
• Sealed Ball Bearings: Increase motor life and improve durability.
• External Brush Caps: Simplify the maintenance process for easier servicing.
• Included Accessories: Comes with grinding wheel, wrench, backing flange, clamp nut, and side handle.

Useful Tips or How-To Section

How to Properly Use the DeWalt DW840 7″ Medium Angle Grinder

1. Preparation:
   • Before using the grinder, ensure the correct grinding wheel is installed.
   • Check the keyless adjustable guard to ensure it’s properly positioned to prevent debris from flying toward you.
   • Plug the grinder into a properly grounded electrical outlet.
2. Safety First:
   • Always wear proper safety gear, including goggles and gloves.
   • Make sure the tool is not connected to the power source while adjusting the wheel or guard.
   • Ensure that the spindle lock button is engaged before attempting to change the grinding wheel.
3. Grinding:
   • Hold the grinder with both hands, using the 2-position side handle for optimal control.
   • Start the grinder and allow it to reach full speed before making contact with the surface.
   • Work in steady motions, ensuring the grinder does not remain in one spot for too long.
4. Maintenance:
   • Periodically clean the tool and check the external brush caps for wear.
   • Inspect the sealed ball bearings regularly to ensure smooth operation.

Related Products

1. DEWALT 20V MAX Brushless Cordless 2-Tool Grinder Kit DCK203P1: A versatile cordless grinder kit with a brushless motor for longer runtime.
2. DeWalt DW831 5″ Medium Angle Grinder: A compact 5-inch grinder, ideal for smaller grinding tasks.
3. DeWalt Angle Grinder DWE4120: A 4.5-inch angle grinder with a durable design for professional-grade use.
4. DeWalt 5″ Brushless Paddle Switch Small Angle Grinder DWE43214: A 5-inch grinder with a paddle switch for added control.
5. DEWALT DWE43114N High Performance Paddle Switch Grinder: High-performance grinder featuring a paddle switch for enhanced safety and control.

Dimensions