6A2 flat recessed grinding wheels 150x20x3x20x32 A B2-01 50% AC4 D 91

6A2 Diamond Grinding Wheel – Flat Recessed Type | FEPA D91 (80/63 μm)

6A2 flat recessed diamond grinding wheel for controlled rough grinding of flat surfaces.
Designed for carbide inserts, cutting tools and technical glass.

Where it is actually used:

Used for flat surface grinding and insert sharpening with reduced grinding forces.
Typical applications include:

• Grinding on low-rigidity machines
• Sharpening of thin or vibration-prone tools
• Operations sensitive to heat and stability

What it actually does:

Moderate material removal with smoother cutting behavior.
Reduces load on spindle and improves process stability.

Grain size (D91 ≈ 80/63 μm):

• Controlled stock removal
• Typical Ra ~ 0.4–1.0 μm
• Prepares surface for M63 → M40 sequence

Concentration 50% means:

• Lower grinding forces
• Open structure → better chip evacuation
• Reduced heat generation
• Smoother, more stable cutting
• Trade-off: lower tool life vs 100%

In practice:

This is a low-load roughing wheel.
Used when machine rigidity is limited or vibration is present.
Prioritizes stability over productivity.

Specification:

• Type: 6A2 (flat recessed)
• Abrasive: Synthetic diamond (AC4)
• Grit: FEPA D91 ≈ 80/63 μm (ANSI 170/200)
• 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
• Steel: maximum rigidity for heavy-duty grinding
• Aluplast: balanced weight and rigidity

Why 50% concentration:

• Reduced cutting forces
• Better control in unstable setups
• Lower risk of burning

Use for:

• Carbide inserts
• Precision tools
• Technical glass
• Controlled rough grinding

Do not use for:

• Maximum productivity grinding
• Finishing operations
• Steel