Dewalt Angle Grinder D28116 - TYPE 1 (2016)

The D28116 is a heavy-duty, small angle grinder released around 2016. It is designed for professionals in masonry and metalworking, The D28116 was marketed as a high-power Small Angle Grinder (SAG) for heavy-duty metal removal and concrete cutting. It was one of the first in its class to feature the Dust Ejection System, which uses centrifugal force to eject debris out of the tool before it reaches the motor. While small the D28116 type 1 hits well above its weight in both versatility and units sold, chances at least one can be found on every work sight or professional garage in the United states and even beyond. Due to the tools wide array of attachments and usable blades and disks, the D28116 is a useful addition to any repair man or woman's tool kit.

• The Nameplate: Locate the black and yellow sticker on the side of the motor housing. It must clearly list the model as D28116 and the type as Type 1.
• Date Code: For the 2016 version, look for a 10-digit code (e.g., 2016-XX-XX) stamped into the plastic housing near the cord or on the nameplate.
• Physical Features: This specific model features a Trigger Grip (rather than a paddle switch) and a distinctive low-profile "jam-pot" gear case designed for access to tight spaces.

• Motor: 13.0 Amp / 2.3 HP (AC/DC).
• Speed: 9,000 RPM (Note: Some 5" models vary, but the D28116 standard is 9,000 RPM).
• Weight: 8 lbs.
• Length: 19.75 inches.
• Safety Features: Includes an adjustable keyless guard and a vibration-reducing side handle.
• Internal Parts: Uses high-purity graphite/copper blend carbon brushes

List of useful tools for repairs and troubleshooting

• Phillips screwdriver
• Allen wrench set
• flat head screwdriver
• wire brush

• Motor Fails to Start: Usually caused by a blown fuse, a tripped circuit breaker, or worn-out carbon brushes. Since this model has Auto-off brushes, the tool will stop completely when they are worn to prevent motor damage.
• Excessive Sparking: Often a sign of dirty or damaged carbon brushes. If sparking is severe, the armature may be failing.
• Overheating: This is frequently caused by the Dust Ejection System™ intake vents becoming clogged with masonry or metal dust. Regular cleaning with compressed air is required.
• Grinding Wheel Vibration: Check the Quick-Change™ Wheel Release and ensure the flange nut is tightened securely. Vibration can also be caused by a bent spindle or an unbalanced wheel.

These are the most common thick discs used for heavy material removal and smoothing welds.

• Size: 4.5" (115mm) or 5" (125mm) diameter.
• Thickness: Typically 1/4" (6mm).
• Common Use: Smoothing metal surfaces, removing rust, and shaping steel.

Note: Always use the "Depressed Center" (Type 27) variety so the locking nut sits flush.

These are much thinner than grinding wheels and are designed strictly for cutting through material, not grinding on the face of the wheel.

• Size: 4.5" or 5" diameter.
• Thickness: Usually 0.040" to 1/16".
• Common Use: Cutting rebar, bolts, metal tubing, and sheet metal.
• Safety Tip: Never use these for side grinding, as the lateral pressure can cause the thin disc to shatter.

-Flap Discs (Type 27 or Type 29)

These consist of overlapping abrasive "flaps" and are used for a combination of grinding and finishing.

• Size: 4.5" or 5" diameter.
• Grits: Available in 40 (coarse) to 120 (fine).
• Common Use: Blending welds and providing a smoother finish than a standard grinding wheel.

Styles: Type 27 (flat) for flat surfaces; Type 29 (conical/angled) for aggressive contour work.

-Diamond Blades

These steel-core blades have diamond-impregnated segments for cutting very hard, abrasive materials.

• Size: 4.5" or 5" diameter.
• Rim Types: * Segmented: Best for fast, dry cutting of concrete and masonry.
  • Continuous Rim: Best for clean, chip-free cuts in tile or stone (often used with water).
  • Turbo: A middle-ground for fast, relatively clean cuts in masonry.

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Parts and break down videos

Official manual

How to use your angle grinder