2020 OKUMA MULTUS B550BB CNC LATHES

Technical Description

The Okuma MULTUS B550 (BB, big-bore variant) is a B-axis multitasking turning center built by Okuma Corporation (Oguchi, Japan), part of the current MULTUS B series. Per Okuma's published specifications, maximum turning diameter is 32.68 in (830 mm), the main spindle nose is A2-11, and the spindle speed range is 30-3,000 rpm with 50/40 hp (37/30 kW) standard power. The machine is built around left and right (opposing) spindles plus a B-axis milling head with a 240-degree swing range; the standard H1 milling spindle reaches 5,000 rpm (12,000 rpm optional) using CAPTO C8 tooling, rated at 50/30 hp. The base automatic tool changer holds 40 tools, with 80- and 160-tool options. Rapid traverse is 1,574 ipm (40 m/min) on X, Y and Z. Current-generation machines ship with Okuma's OSP-P500S control; this unit's build year predates that control's introduction, so the exact control fitted to this 2020 machine is not confirmed and is left blank, along with overall dimensions, weight, chuck size and spindle bore, none of which Okuma publishes.