Superabrasive Particle Protrusion

This is the amount that the abrasive is exposed from the bonding system. Typically this is from zero to 35% of the size of the abrasive particle, depending on the state of dress and the strength of the bonding system used (Nickel bond being the strongest and Resin bond the weakest). The greater the effective distance between the abrasive particle’s leading edge and the bonding system the more efficiently the blade will cut.

Bond Porosity

This is the intentional incorporation of voids into the bonding structure to allow coolant to enter the cutting area. And for the swarf to build up without interfering with the abrasives, before the swarf is flushed out by the coolant at the exit of the cut. There are tremendous variations in the amount of porosity from bond type to bond type and even within each bonding system, but generally the Vitreous bonds are the most porous and the Nickel bonds the least porous.

Bond Resiliency

This is the flex or give (or lack of) that a particular bonding system has in relationship to the abrasive particle. As a general rule the more resilient the bond, the more friable (weak) the abrasive should be.

Least resilient to most resilient bonding systems:

Vitrified Bond, Nickel Bond, Metal Bond, Phenol Resin, Polyimide Resin

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