Kiwa KH-5800kai

The Kiwa KH-5800kai puts a 40-taper spindle over a large work envelope: 800 mm (31.5 in) of X and Y travel, 850 mm (33.5 in) of Z, and workpieces up to Ø800 x 1,000 mm (Ø31.5 x 39.4 in) on a 500 x 500 mm (19.7 x 19.7 in) pallet. That combination suits big, light parts, where the machine has to reach a long way but the cut itself is modest.

The comparison that explains it is the KH-55, which has the same 800 mm X and Y travel but a BT 50 spindle limited to 10,000 min-1 and 60,000 mm/min (2,362 ipm) rapids. The KH-5800kai starts at 12,000 min-1 direct drive, lists 15,000 min-1 direct-drive and 20,000 min-1 built-in spindles as options, and rapids at 80,000 mm/min (3,150 ipm). Choose between the two on material and tooling, since travel will not settle it.

Z is the longest axis at 850 mm (33.5 in). On a horizontal, Z is the stroke that lets a long tool pull clear of a deep part before the pallet indexes, so the extra length helps with deep housings and long boring bars. The B axis turns at 66.6 rev/min.

The 500 x 500 mm pallet is standard, with 400 x 400 mm and 630 x 630 mm listed as options, so the same travels can be paired with a pallet matched to the fixture base. Two pallets are standard and a 6-pallet version is optional. The magazine holds 40 tools, with 60, 120 and 240 available.

Here the FANUC 31i-B Plus is the standard control and the 0i-MF Plus the option, the reverse of the KH-4200kai. Floor space, including the coolant tank and excluding the chip conveyor, is 2,618 x 5,482 mm (103.1 x 215.8 in) with the two-pallet changer and the 40 or 60 tool magazine, and 2,850 x 5,482 mm (112.2 x 215.8 in) with 120 or 240 tools.