Machining

Conventional grinding wheels (such as alumina, CBN, or ceramic) offer significant advantages in everyday work:

• Low cost – more economical for serial production or routine use.
• Work flexibility – suitable for a variety of soft and medium metals, including carbon steels.
• Simple maintenance – the wheel can be easily sharpened or restored with a dresser.
• Good working speed – for general grinding or rapid material removal.
• Good resistance to moderate heat – less sensitive to overheating.

Diamond wheels are used for jobs requiring high precision and edge strength, and they excel in:

• Extremely high hardness – diamond is the hardest material in nature.
• Excellent grinding precision – allows for precise finishing even on delicate details.
• Several times longer working life – less wear and less need for replacement.
• Low heat dispersion – prevents material deformation and extends tool life.
• Suitable for hard materials – such as carbide, glass, ceramics, PM, and hardened steels.
• High-quality finish – leaves smoother and more accurate surface finishes.

If you are working with common metals and need an economical solution, a conventional grinding wheel will suffice. However, for hard, delicate materials or those requiring high tolerance, a diamond wheel will provide a more precise result and long-term durability.

The correct choice of a grinding wheel directly affects grinding quality, surface finish, and wheel life.

• 1. Material you are grinding:
  • Aluminum, brass, soft steels: White alumina or silicon carbide wheel
  • Hardened steels or cutting tools: Purple alumina / ceramic
• 2. Grit Size and Surface Finish:

Grit Size	Typical Use	Approximate Surface Finish (N Finish)
36–60	Coarse material removal	N10 – N9
80–120	General machining / Medium finish	N8 – N7
150–220	Fine finish	N6 – N5
240–400+	Very precise finish / Before plating	N4 – N3

• 3. Wheel Hardness (Grade):
  • Hard: For soft materials – lasts longer
  • Soft: For hard materials – regenerates itself during work
• 4. Bond Type:
  • Vitreous (V): Heat resistant, common for dry grinding
  • Resinoid (B): More flexible – suitable for wet work or precise finishing
• 5. Wheel Shape: Choose according to the type of work (flat, angled, concave wheel, etc.)
• 6. Operating Speed: Ensure compatibility between wheel speed (allowed RPM) and the machine – safety first.

Professional Tip: If you need a surface finish around N6–N7 – choose a 120–150 grit wheel. For initial processing or cleaning – you can go down to 46 or 60 grit.