4B2 dish grinding wheels 150x6x3x12x20x32 A B2-01 100% ACH M 63

4B2 Diamond Grinding Wheel – Dish Type | FEPA M63 (63/50 μm)

4B2 dish grinding wheel for sharpening and preparation of tool face surfaces.
Designed for carbide and other hard brittle materials.

Where it is actually used:

Used for face grinding and sharpening at early transition stage after rough grinding.
Typical applications include:

• Face grinding of end mills and milling cutters after D-series
• Sharpening of carbide saw blades
• Preparation of reamers before finer micron stages

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

What it actually does:

Productive material removal with basic surface refinement.
Removes deep scratches from D107 / D91 and prepares geometry for further finishing.

Grain size (M63 ≈ 63/50 μm):

• High stock removal with improved control vs coarse grits
• Typical Ra ~ 0.30–0.60 μm
• Transition step before M40 → M25 sequence

In practice:

This is a pre-transition wheel.
Used after rough grinding (D91 / D107) and before M40.
Focus is removing rough marks and stabilizing the surface.

Specification:

• Type: 4B2 (dish)
• Abrasive: Synthetic diamond (АСН)
• Grit: FEPA M63 ≈ 63/50 μm (ANSI ~230–270)
• 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 this shape:

• Accurate face contact
• Access to cutting edges
• Suitable for angular surfaces

Use for:

• Face grinding
• Tool sharpening
• Pre-transition grinding

Do not use for:

• Fine finishing (use M40 → M10)
• Polishing
• Steel