Goodway HA-2000

The Goodway HA-2000 is the largest horizontal lathe Goodway makes. It swings Ø2,000 mm (78.7 in), turns Ø1,700 mm (66.9 in) and, on the longest bed, takes work 10,000 mm (393.7 in) long. Goodway quotes exactly these two limits, Ø1,700 mm and 10,000 mm, as the capacity of the HA series.

Parts of that size are the business of the energy, aerospace and shipbuilding industries, which is where the maker places the machine: turbine and generator shafts, propeller shafts, large rolls. X-axis travel is 895 mm (35.2 in). Z-axis travel runs from 2,150 mm (84.6 in) to 10,150 mm (399.6 in).

Cutting power is modest on paper for the swing, 37 kW (49.6 hp) continuous and 45 kW (60.3 hp) for 15 min., but it is delivered through a 3-speed gearbox to give 13,300 Nm at the spindle. On work this large, torque at very low speed is what removes metal. Spindle speed is listed as varying by model, between 250 rpm and 800 rpm.

The structure is a flat bed with four box ways cast in one piece. Is a turret the right tool carrier for such parts? Often not, and Goodway lists alternatives: a four-way toolpost and an anti-vibration boring bar besides the 12-station servo turret. With the M variation the machine gains a 12-station live tooling turret at 3,000 rpm and a Cf-type C-axis, so keyways and bolt circles can be cut without moving a very heavy workpiece to another machine.