A 4-inch grinding wheel is a common size used for handheld angle grinders, especially for light to medium-duty grinding, cutting, and surface preparation tasks. Here's a quick overview:

🔧 4-Inch Grinding Wheel – Basic Specs

Feature Details Diameter 4 inches (100 mm) Bore (Arbor) Size Usually 16 mm or 5/8 inch (approx. 15.88 mm) Thickness Varies – common sizes are 1 mm to 6 mm Material Aluminum Oxide, Silicon Carbide, or Diamond Max RPM ~13,000 – 15,000 (depends on brand/type) Used With Angle grinders (100 mm / 4")

🛠️ Common Types of 4" Grinding Wheels

1. Depressed Center Wheel (D.C. Wheel)

   • Used for surface grinding and edge bevelling.

2. Cut-off Wheel

   • Thin (1–2 mm), used for cutting metal, rods, pipes, etc.

3. Flap Disc (Not a grinding wheel technically)

   • Used for finishing and polishing after grinding.

4. Diamond Grinding Wheel

   • Used for tiles, stones, concrete, and glass.

✅ Applications

• Metal grinding and weld removal

• Cutting rebar, rods, pipes

• Cleaning rust or paint