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About the grinding wheel :
Vitrified bonds allow the wheel to be very rigid, strong and porous. These characteristics each provide many benefits to the wheel. Having a rigid wheel allows for a strong cutting performance and increased grinding speed. Another added benefit of the vitrified bond is its porous character. The porosity of the wheel allows coolant to penetrate between the work piece and the wheel to effectively remove heat from the point of contact, and we all know that any reduction in heat generated while grinding will extend the life of the product.
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