#5 Basic Knowledge of Grinding Wheel Part.2

Posted by EMICorporation on

Ⅱ. Manufacturing Process of Grinding Wheels

Three Factors of Grinding Wheels

There are many different kind of manufacturing methods depending on bonds. Our products are produced with resinoid bonds which is safe and used in many industries.

Bond Type Code Major Components Firing Method / Temperature Applications Features
Vitrified V Feldspar / Soluble Clay Continuous kiln / Bell kiln / Downdraft kiln 1200-1350°C (2192-2462°F) Machining, Free-hand grinding, Super finishing, Honing, Pulpstone
  • Use feldspar and/or soluble clay as binder and bake at high temperature of 1300 degrees C after complete drying.
  • The most common manufacturing method.
  • Easy to adjust grade and structure.
Resinoid B・BF
*BF=Resinoid and Reinforced
Phenol resin, other artificial resins Low temperature electric oven, around 200°C (392°F) Rough grinding, Free-hand grinding, Cutting, Machining, Lapping
  • Use synthetic resin as binder and harden at low temperature of 200 degrees C.
  • Springy and resistant to high speed rotation.
  • There are wide variety of wheels according to purposes.
  • *Our grinding wheels are resinoid bonded wheels which are produced by this method.

Silicate S Silicate soda (water glass) Downdraft kiln 600-1000°C (1112-1832°F) Sharpening, surface grinding
  • Use silicate soda as binder and harden at low temperature. Ideal for sharpening and polishing of wood saw.
  • Silicate soda acts as lubrication.
  • For soft grade wheels.
Magnesia O Magnesium oxychloride cement Unfired wheel, harden at ordinary temperature. Sharpening, surface grinding.
  • Use kind of cement as binder and harden at ordinary temperature. Reduce effect of grinding heat, ideal for surface grinding of thin materials.
  • Provide good grinding performance with low speed.
Shellac E Shellac (natural resin) Low temperature electric oven, around 170°C (338°F) Tool grinding, Lapping
  • Use natural resin as binder and harden at low temperature after compression molding. Ideal for low speed lapping.
  • For soft grade wheels

Manufacturing Method of Grinding Wheels

Manufacturing process of our main products “resinoid bonded wheel” are introduced below.

Raw materials

Grinding wheel_Raw materials
  • Use Abrasive grains, filling and bond.
  • Compounding ratio varies with each product.

What is filling?
Except abrasives and bond, grinding wheel contains many compounds as filling. There are many purposes of adding filling, such as performance increase or coloring (green, red or black etc.).

Mixing the ingredients

Grinding wheel_mixing prosess

All materials are dried after mixing thoroughly.


Grinding wheel_molding
  • Forming in mold.
  • Insert special glass fiber (glass cloth) as reinforcement during the molding process.


Grinding wheel_pressing

Demold after pressing.


Grinding wheel_firing
  • Fire wheels completely at around 200 °C (392°F)
  • Firing is a very important process that influence its grade and quality.


Grinding wheel_inspection

We inspect all products to keep high quality and safty.


Grinding wheel_test

Perform many test for maintaining high quality and safety of the products.


Grinding wheel_indications

Print and stick label on the products.


Grinding wheel_packaging

Packaging products in boxes.


Grinding wheel_shipping

Packaging products in boxes.

Our products are manufactured by the above processes.
We are committed to offering safe and good quality products to customers.


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