4B2 dish grinding wheels 180x4x3x16x20x32 A B2-01 50% AC4 D 213

4B2 Diamond Grinding Wheel – Dish Type | FEPA D213 (212/180 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
• Heavy reconditioning of worn tools under unstable conditions
• Bulk material removal with limited spindle power

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

What it actually does:

Maximum material removal with smoother and more stable cutting behavior.
Significantly reduces grinding forces compared to higher concentrations.

Grain size (D213 ≈ 212/180 μm):

• Extreme stock removal rate
• Typical Ra ~ 2.0–4.0 μm
• Prepares surface for D181 → D151 sequence

Concentration 50% means:

• Minimum grinding forces for this grit range
• Highly open structure → excellent chip evacuation
• Lower heat generation
• Smoother and more forgiving cutting behavior
• Trade-off: reduced tool life and cutting aggressiveness

In practice:

This is a low-load extreme roughing wheel.
Used when maximum material removal is required but machine stability is limited.
Ideal for weak setups, long tools and vibration-sensitive operations.

Specification:

• Type: 4B2 (dish)
• Abrasive: Synthetic diamond (AC4)
• Grit: FEPA D213 ≈ 212/180 μm (ANSI 70/80)
• 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:

• Minimum cutting forces
• Improved process stability
• 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