4B2 dish grinding wheels 150x6x3x12x20x32 A B2-01 100% cBN1 B 107

4B2 CBN Grinding Wheel – Dish Type | FEPA B107 (106/90 μm)

4B2 dish grinding wheel with cubic boron nitride (cBN) for sharpening and grinding of steel tools.
Designed for HSS, tool steel and other ferrous materials.

Where it is actually used:

Used for face grinding and sharpening of steel cutting tools.
Typical applications include:

• Face grinding of HSS end mills and milling cutters
• Sharpening of drills and reamers
• Tool maintenance and reconditioning

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

What it actually does:

Productive material removal with controlled geometry formation.
Establishes flatness and prepares the surface for finer grinding stages.

Grain size (B107 ≈ 106/90 μm):

• High stock removal rate
• Typical Ra ~ 0.6–1.2 μm
• Leaves visible grinding marks

CBN (cBN1):

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

In practice:

This is a rough / semi-finish wheel for steel tools.
Used before B91 → B64 → B46 sequence.
Focus is efficient material removal and geometry setup.

Specification:

• Type: 4B2 (dish)
• Abrasive: Cubic Boron Nitride (CBN1)
• Grit: FEPA B107 ≈ 106/90 μm (ANSI 140/170)
• 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)
• Higher thermal resistance
• Stable performance in dry or semi-dry grinding

Use for:

• Steel tool sharpening
• Face grinding
• Rough / semi-finish grinding

Do not use for:

• Carbide (use diamond)
• Final finishing
• Polishing