The combination of Hardinge Bridgeport vertical machining centre (VMC) expertise with Heidenhain control functionality and drives technology linked to its high accuracy linear scale positioning as an option has resulted in a new, compact, high accuracy 5-axis VMC from the Leicester facility. The GX 250 5AX expands the 5AX series that already includes the larger XR 300 and XR 600, however it provides a greater than normal working envelope for its base size. It is able to accept components up to 250mm diameter by 240mm long with the high speed cutting capability of a 20,000rpm spindle available as an option. The GX 250 5AX is totally new with a 20 tool capacity magazine supplying the HSK A63 taper spindle powered by a built-in 23kW, 20,000rpm motor providing a torque level of 37.4Nm. Accuracy in X, Y and Z is within 7µm and repeatability within 4µm through its linear scale positioning option. Meanwhile, accuracy levels achieved in the rotary table A-axis tilt of +30°/-120° is 20 arc seconds and 10 seconds in the 360°rotary C-axis. Axis strokes are 300mm in X, 400mm in Y and 430mm in Z with a 210mm diameter high rigidity rotary table with tilt. The table unit incorporates a ‘big bore' cross roller bearing to ensure accuracy and support heavy cutting loads. Rapid traverse rates are 30m/minute through the working volume on 35mm roller type linear guideways which also contribute to maximise rigidity. Heidenhain's latest iTNC 530 5-axis simultaneous control is standard with the inclusion of dynamic collision monitoring enabling the full working zone to be effectively utilised. Tools up to 80mm diameter by 250mm long weighing up to 6kg can be carried in the 20 position magazine with swing arm change. Tool diameter can be increased to 95mm with the adjacent pockets left empty. Tool to tool time is within three seconds. Hardinge
www.hardinge.co.uk
Hall 5, Stand 5475
