BIG Daishowa extends C-cutter chamfering tool range

BIG Daishowa purpose-designed 45º C-cutter range for high precision plunge-chamfering of holes has been extended by two additional fixed-angle cutters for chamfering at 30 and 60º respectively, as well as a universal type on which the angle can be set anywhere between 5 and 85º.

Available in the UK through NCMT, the range now therefore comprises two 30º tools for chamfering holes from 16 to 85 mm diameter and three 60º tools for 14 to 65 mm diameter holes. The original 45º C-cutters can machine holes up to 100 mm diameter. The wide, overlapping chamfering ranges save on the number of toolholders needed, minimising unproductive tool change times and the number of pots occupied in the tool magazine.

Adjustable nozzles direct coolant to the point of cutting to facilitate high feeds and speeds. The two sharp cutting edges of each parallelogram-shaped carbide insert, which is securely clamped by a double screw system, promote a high quality surface finish on the chamfer, even at cutting speeds up to 240 mm/min and feedrates up to 0.6 mm/rev.

The Universal C-cutter employs a novel cartridge system for adjusting the insert angle quickly using a hex key and a direct circular scale. The shallowest chamfer angle of 5º requires a minimum hole diameter of 5.5 mm, while for the steepest 85º chamfer, thesmallest hole diameter is 38.8 mm.

Author
Celia Cadwallader

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