By implementation of core technology of Capacitor-resistance welding, RingMash technology, metallic bonding, is developed to manufacture svarious components, the best suited for powertrain components such as transmission gears, at low cost. Components made by RingMash are attributed to smaller and lighter transmission. The technology is recommended to manufacture co-axle male-female work pieces bonding, male side diameter is slightly larger than female side hole. RingMashing is a solid state bonding without melting work piece. The actual RingMashing process is done in ambient atmosphere and does not use filler. RingMashing bonding process itself takes only 100 milliseconds, results very minimum Heat Affected Zone (HAZ), normally no more than 1 mm. The minimum HAZ achieves excellent structural integration for better performance of transmission. If two work pieces are same metals, sputtering free bonding is possible. It is also possible to bond two different metals, cast iron and steel, copper alloy and steel, aluminum alloy and steel, and so on. Another great advantage of RingMashing is fast cycle time. RingMashing process total cycle time, including the replacement time of the work pieces, is between 10 and 15 sec. In case of typical low alloy steel, SCM415H, bonding, 50mm diameter: Great bonding condition is obtainable with bonding depth of 2 to 3.5 mm all the way around. The bonding area is verified as solid state condition without melting the work pieces. Metal structure of the vicinity of the bonding area is made larger plastic flow. If the electric current is too large, spattering occurs. If the bonding strength electric current is too small, it becomes insufficient.