4B2 dish grinding wheels 150x6x3x12x20x32 A B2-01 100% cBN1 B 126

4B2 CBN Grinding Wheel – Dish Type | FEPA B126 (125/106 μm)

4B2 dish grinding wheel with cubic boron nitride for 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 where higher material removal is required.
Typical applications include:

• Initial face grinding of HSS end mills and milling cutters
• Sharpening of drills and reamers
• Preparation before B107 → B91 sequence

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

What it actually does:

Aggressive material removal with stable geometry formation.
Quickly removes material and establishes flat reference surface.

Grain size (B126 ≈ 125/106 μm):

• Very high stock removal rate
• Typical Ra ~ 0.8–1.5 μm
• Leaves visible and deep 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 primary roughing wheel for steel tools.
Used before B107 → B91 → B64 sequence.
Focus is fast material removal and geometry setup.

Specification:

• Type: 4B2 (dish)
• Abrasive: Cubic Boron Nitride (CBN1)
• Grit: FEPA B126 ≈ 125/106 μm (ANSI 120/140)
• 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
• Rough grinding

Do not use for:

• Carbide (use diamond)
• Final finishing
• Polishing