4B2 dish grinding wheels 125x6x2x10x20x32 A B2-01 50% AC4 D 181

4B2 Diamond Grinding Wheel – Dish Type | FEPA D181 (180/150 μm)

4B2 dish grinding wheel for extreme rough sharpening and preparation of tool face surfaces.
Designed for carbide and other hard brittle materials.

Where it is actually used:

Used for face grinding and sharpening with reduced grinding forces at the earliest machining stage.
Typical applications include:

• Initial face grinding on low-rigidity machines
• Sharpening of long or vibration-prone tools
• Bulk material removal under unstable conditions

The dish shape provides accurate contact on flat and angular surfaces.

What it actually does:

Extreme material removal with smoother and more stable cutting behavior.
Less aggressive than higher concentrations, improving control and reducing vibration impact.

Grain size (D181 ≈ 180/150 μm):

• Very high stock removal rate
• Typical Ra ~ 1.5–3.0 μm
• Prepares surface for D151 → D126 sequence

Concentration 50% means:

• Significantly reduced grinding forces
• Highly open structure → excellent chip evacuation
• Lower heat generation
• Smoother and more forgiving cutting
• Trade-off: reduced tool life and cutting aggressiveness

In practice:

This is a low-load extreme roughing wheel.
Used when maximum control is required during aggressive grinding.
Ideal for unstable setups and delicate geometries.

Specification:

• Type: 4B2 (dish)
• Abrasive: Synthetic diamond (AC4)
• Grit: FEPA D181 ≈ 180/150 μm (ANSI 80/100)
• Concentration: 50%
• Body: P / A / S / Ap
  (Pressed / Aluminum / Steel / Aluplast)

Body options:

• Pressed: lighter weight, vibration damping, better surface finish
• Aluminum: lightweight with good rigidity, general-purpose solution
• Steel: maximum rigidity for heavy-duty grinding
• Aluplast: balanced weight and rigidity

Why this concentration:

• Lower cutting forces
• Improved stability in difficult conditions
• Reduced thermal load

Use for:

• Face grinding
• Tool sharpening
• Low-load extreme rough grinding

Do not use for:

• Maximum productivity grinding
• Finishing operations
• High-pressure grinding