4B2 dish grinding wheels 150x6x3x12x20x32 A B2-01 100% cBN1 B 151

4B2 CBN Grinding Wheel – Dish Type | FEPA B151 (150/125 μm)

4B2 dish grinding wheel with cubic boron nitride for heavy rough sharpening and preparation of steel tool face surfaces.
Designed for HSS, tool steel and other ferrous materials.

Where it is actually used:

Used for face grinding and sharpening at early stage where high stock removal is required.
Typical applications include:

• Initial face grinding of HSS end mills and milling cutters
• Sharpening of drills and reamers from worn condition
• Bulk material removal before B126 → B107 sequence

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

What it actually does:

Very aggressive material removal with basic control of flatness.
Quickly removes large volumes of material and establishes initial geometry.

Grain size (B151 ≈ 150/125 μm):

• Very high stock removal rate
• Typical Ra ~ 1.0–2.0 μm
• Leaves deep and aggressive grinding marks

CBN (cBN1):

• Optimized for steel and ferrous materials
• High thermal stability
• Maintains cutting ability at elevated temperatures
• Long tool life in steel grinding

In practice:

This is a heavy roughing wheel for steel tools.
Used before B126 → B107 → B91 sequence.
Focus is maximum productivity and fast material removal.

Specification:

• Type: 4B2 (dish)
• Abrasive: Cubic Boron Nitride (CBN1)
• Grit: FEPA B151 ≈ 150/125 μm (ANSI 100/120)
• 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 CBN:

• Designed for steel (diamond is not suitable)
• High thermal resistance
• Stable cutting at elevated temperatures

Use for:

• Steel tool sharpening
• Face grinding
• Heavy rough grinding

Do not use for:

• Carbide (use diamond)
• Finishing operations
• Polishing