Metav 2018

Internal grooving with depths down to 7.5 mm

| Editor: Rosemarie Stahl

Systems 209 and 216 offer good damping properties and an internal coolant supply.
Systems 209 and 216 offer good damping properties and an internal coolant supply. (Source: Paul Horn)

At Metav, Hartmetall-Werkzeugfabrik Paul Horn will present numerous tool products, among them Systems 209 and 2016. The grooving systems are designed for the internal machining of bores with diameters ≥ 16 mm (0.6299") (System 209) and ≥ 20 mm (0.7874") (System 216).

At retraction distances of up to 50 mm (1.9685"), a maximum grooving depth of 7.5 mm (0.2952") can be achieved. Key elements of both systems include toolholders with internal cooling and two-edged indexable inserts with cutting widths of 2 to 6 mm (0.0787 to 0.2362"). The robust shank with elliptical cross-section on the boring bar neck ensures excellent damping properties, Horn says.

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The coolant jet escapes both from a nozzle in the clamping finger and from the side of the toolholder. According to Horn, the two coolant jets cool the cutting zone effectively and remove chips from the inside of the workpiece in a controlled, efficient manner. Made from AS45 substrate, the precision-sintered, two-edged indexable inserts with widths of 2 to 6 mm (0.0787 to 0.2362") are available in the geometries .5 / .1A and .KF for medium-strength materials. According to the company, all three geometries prove their worth thanks to very good chip control and targeted chip-breaking, even with long-chipping materials.

209 System toolholders with a shank diameter of 16 mm (0.6299") allow for retraction distances of up to 30 mm (1.1811") in conjunction with a grooving depth of 3.5 mm (0.1378"). For bores with a diameter of 18 mm (0.7087") or above, a more stable shank diameter (20 mm (0.7874")), also with a retraction distance of 30 mm (1.1811"), can be used to achieve a grooving depth of 5 mm. The System 216 can be used for internal grooving in bores with a diameter of 20 mm (0.7874") or above. For this, toolholders with a shaft diameter from 20 mm (0.7874") are available. As such, grooving depths down to 7 mm (0.2755") can be achieved at a projection length of 2 x D.

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