Metallic bonds provide high grit retention and low wear during grinding. However, a copper bonding might smear during grinding. Metallic bonds might have low porosity, so that fillers in the bond are added for lubrication during grinding.
Metallic bonded tools are difficult to condition mechanically [WEGE11]. Electro physical and electro chemical processes can be applied due to the electrical conductivity of the metallic bond and are used in many different set-ups [WEGE11]. Klink examined the electro discharge and electro chemical dressing of different metallic bond compositions (Cu-bronze, Fe-bronze, Co-bronze) [KLIN09]. Ohmori and Nakagawa invented the Electrolytic In-process Dressing (ELID) method [OHMO90]. The cast iron fiber bonding of a diamond grinding wheel is anodized to generate grit protrusion [OHMO90]. ELID has advanced a lot and is possible when applied to grinding wheels with cast iron bonding, hybrid metal-resin bonding, and bronze bonding [BIFA99, ITOH98, WEGE11, KLIN09].
Porous metallic wheels can be conditioned by crushing, i. e. inducing bond breakage by high dressing forces [HESS03]. Crushing commonly takes place at dressing speed ratios of qd = +1, which means there is no relative speed between the dressing tool and the grinding wheel in the contact point. For example, crushing replicates fine threads into brittle bronze bonding [KLOC82].