1A1 straight grinding wheels 300x5x20x127 P B2-01 100% cBN1 B 107

1A1 CBN Grinding Wheel – FEPA B107 (106/90 μm) | CBN1

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

What it actually does:

Efficient material removal with better control than coarser grits.
Used for shaping and preparing surface before fine grinding stages.

Grain size (B107 ≈ 106/90 μm):

Medium-coarse grit for stable grinding.

• Good stock removal rate
• Typical Ra ~ 0.5–1.0 μm
• Prepares surface for B91 → B64

More controlled than B126/B151, but not a finishing grit.

In practice:

This is a transition grinding wheel.
Used after rough grinding (B151/B126) to stabilize geometry before fine stages.
Often the first step where surface quality becomes more controlled.

Specification:

• Type: 1A1 (straight)
• Abrasive: Cubic Boron Nitride (CBN1)
• Grit: FEPA B107 ≈ 106/90 μm (ANSI 140/170)
• Concentration: 100%
• Body: P / S / Ap
  (Pressed / Steel / Aluplast)

Behavior:

• Stable cutting on hardened steels
• Good balance between removal and finish
• Low thermal load
• Note: requires further finishing steps

Body options:

• P: vibration damping, improved surface
• 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
• Pre-finishing

Do not use for:

• Carbide
• Ceramics
• Non-ferrous materials