2021 Okuma MB-4000H CNC Horizontal Machining Center

The Okuma MB-4000H is a 400 mm-class CNC horizontal machining center with a reputation for thermal stability and unattended reliability that has made it a workhorse in high-mix, high-volume production shops. This 2021 example offers X/Y/Z travels of 22.05 x 22.05 x 24.61 inches over a 400 mm (15.75 in) rotary pallet, served by a 6-station automatic pallet pool for extended lights-out running, with a CAT 40 spindle turning up to 15,000 RPM and a 146-tool ATC for large, multi-part runs. It runs Okuma OSP control with the Thermo-Friendly Concept and comes equipped for production with Renishaw RMP60 spindle probing, MP Systems high-pressure coolant, a Mayfran chip conveyor, and a mist collector - a turnkey, automation-ready cell for aerospace, medical, and contract machining work.

Compared to the earlier Okuma MB-400H it succeeds, the MB-4000H is a meaningfully more capable machine, not just a newer one. Okuma re-engineered the platform with a faster, higher-rpm spindle, the current-generation OSP control with a larger display and faster processing, quicker rapids, and easier automation integration for pallet pools and robotics. For a shop expanding horizontal capacity or stepping up from an MB-400H, the MB-4000H delivers more spindle speed, smarter thermal compensation, and true unattended-production capability at a used-machine price.