Dewalt DW8420 Thin Cutting Wheel 4x0.045x5/8 in

Product Description

The DEWALT DW8420 is a bonded abrasive thin cutting wheel designed for fast, clean cuts on metal and similar materials. Measuring 4 inches in diameter, 0.045 inches thick, and with a 5/8-inch arbor bore, this wheel fits standard 4-inch angle grinders commonly used in mechanical, electrical, and plumbing trades. The thin kerf profile reduces drag and heat buildup during cuts, which extends wheel life and improves cut quality on light-gauge steel, conduit, strut, and threaded rod. It is sold individually and is a standard consumable for any shop or job-site kit.

This cutting wheel is suited for trade professionals who need a reliable consumable for everyday cutting tasks on-site. Electricians cutting EMT or rigid conduit, plumbers trimming threaded pipe, and HVAC techs cutting sheet metal strut or angle iron will find this wheel a practical fit. Its compact 4-inch diameter makes it well suited for work in tight spaces or on smaller angle grinders where control and maneuverability matter.

Key Features

• Thin 0.045-inch kerf minimizes material loss and reduces heat during cutting
• 4-inch diameter fits standard small-angle grinders used across multiple trades
• 5/8-inch arbor bore for direct mount on compatible grinder spindles
• Bonded abrasive construction provides consistent cutting performance across the wheel life
• Lightweight at 0.13 pounds, keeping tool balance in check during extended use

Compatibility

Designed as an OEM-style consumable replacement for use with 4-inch angle grinders accepting a 5/8-inch arbor cutting wheel.

Installation Notes

Always power down and disconnect the grinder from its power source before mounting or removing a cutting wheel. Inspect the wheel for cracks or chips before each use and never operate a damaged wheel. Ensure the wheel guard is properly installed and that the wheel RPM rating meets or exceeds the grinder's no-load speed. Wheel installation and use should follow applicable ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels.

Technical Specifications

• Diameter: 4 inches
• Thickness: 0.045 inches
• Arbor Bore: 5/8 inches
• Wheel Type: Thin Cutting Wheel
• Construction: Bonded Abrasive
• Weight: 0.13 pounds
• UPC: 028877321790
• Unit of Measure: Each

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: DW8420