6A2 flat recessed grinding wheels 70x6x3x18x20 A B2-01 100% cBN1 B 181

6A2 CBN Grinding Wheel – Flat Recessed Type | FEPA B181 (180/150 μm)

6A2 flat recessed grinding wheel with cubic boron nitride for extreme rough grinding of steel flat surfaces.
Designed for HSS, tool steel and other ferrous materials.

Where it is actually used:

Used for flat surface grinding and sharpening at the earliest stage with maximum stock removal.
Typical applications include:

• Initial grinding of HSS tools from solid
• Heavy reconditioning of severely worn tools
• Bulk material removal before B151 → B126 sequence

What it actually does:

Maximum material removal with minimal surface control.
Rapid stock removal to establish initial flat geometry.

Grain size (B181 ≈ 180/150 μm):

• Extreme stock removal rate
• Typical Ra ~ 1.5–3.0 μm
• Leaves very deep grinding marks

CBN (cBN1):

• Optimized for steel and ferrous materials
• High thermal stability
• No chemical wear like diamond on steel
• Long tool life in steel grinding

In practice:

This is an extreme roughing wheel.
Used as the first step before B151 → B126 → B107.
Focus is maximum productivity, not precision.

Specification:

• Type: 6A2 (flat recessed)
• Abrasive: Cubic Boron Nitride (CBN1)
• Grit: FEPA B181 ≈ 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
• Steel: maximum rigidity for heavy-duty grinding
• Aluplast: balanced weight and rigidity

Why CBN:

• Designed for steel
• High thermal resistance
• Stable performance under heavy load

Use for:

• HSS tools
• Steel inserts
• Flat surface grinding
• Extreme rough grinding

Do not use for:

• Carbide
• Finishing
• Polishing