1A1 straight grinding wheels 80x3x6x20 P B2-01 100% cBN1 B 91

1A1 CBN Grinding Wheel – FEPA B91 (90/75 μm) | CBN1

Straight CBN grinding wheel (1A1) for fine grinding of hardened steels.
Designed for HSS, tool steel and other ferrous materials.

What it actually does:

Controlled material removal with stable cutting performance.
More aggressive than finer grits, but already suitable for fine grinding.

Grain size (B91 ≈ 90/75 μm):

Medium grit for fine grinding operations.

• Good balance between stock removal and surface quality
• Typical Ra ~ 0.3–0.8 μm
• Prepares surface for finer B64 / B46

Stable and predictable in steel grinding.

In practice:

This is a fine grinding wheel for steels.
Used after rough grinding to refine geometry before finishing stages.
Often first step where surface quality becomes important.

Specification:

• Type: 1A1 (straight)
• Abrasive: Cubic Boron Nitride (CBN1)
• Grit: FEPA B91 ≈ 90/75 μm (ANSI 170/200)
• Concentration: 100%
• Body: P / S / Ap
  (Pressed / Steel / Aluplast)

Behavior:

• Stable cutting on hardened steels
• Lower heat vs conventional abrasives
• Good dimensional stability
• Note: requires finishing for high surface quality

Body options:

• P: vibration damping, better finish
• S: maximum rigidity
• Ap: balanced performance

Dimensions (D × X × T × H):

• D – outer diameter
• X – abrasive layer
• T – total thickness
• H – bore diameter

Use for:

• HSS grinding
• Tool steel
• Hardened components
• Precision grinding

Do not use for:

• Carbide
• Ceramics
• Non-ferrous materials