4B2 dish grinding wheels 125x6x2x10x20x32 P B2-01 100% 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 at the earliest stage where maximum material removal is required.
Typical applications include:

• Initial face grinding of end mills and milling cutters from solid
• Sharpening of carbide saw blades with heavy wear
• Bulk material removal before D151 → D126 sequence

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

What it actually does:

Extreme material removal with minimal control of surface quality.
Rapidly removes large volumes of material and establishes initial flat surface.

Grain size (D181 ≈ 180/150 μm):

• Very high stock removal rate
• Typical Ra ~ 1.5–3.0 μm
• Leaves very deep and aggressive grinding marks

In practice:

This is an extreme roughing wheel.
Used as the first step before D151 → D126 → D107 sequence.
Focus is maximum productivity, not precision.

Specification:

• Type: 4B2 (dish)
• Abrasive: Synthetic diamond (AC4)
• Grit: FEPA D181 ≈ 180/150 μm (ANSI 80/100)
• Concentration: 100%
• 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 shape:

• Accurate face contact
• Access to cutting edges
• Suitable for angular surfaces

Use for:

• Face grinding
• Tool sharpening
• Extreme rough grinding

Do not use for:

• Finishing operations (use D151 → M10)
• Polishing
• Precision grinding