Okuma MB-4000H

What the maker publishes about the current Okuma MB-4000H

The Okuma MB-4000H is a horizontal machining center in the MB-H Series, and this one machine mills, bores, drills and taps. Its maximum machining volume measures 22.05 x 22.05 x 24.61 in. Work sits on a rotary pallet of 15.75 x 15.75 in. The standard spindle runs from 50 to 15,000 rpm, and Okuma lists a 20,000 rpm spindle as the alternative. On the high winding, spindle power reads 34/25 hp, with 40/30 hp given in brackets. Rapid traverse is 2,362 ipm. The tool magazine holds 48 tools as standard, and multi-magazine versions step up through 64, 110, 146 and 182 to 218 pockets. Okuma lists a compact 6-station automatic pallet changer that pairs with the machine. The Okuma OSP control and the Thermo-Friendly Concept come with it.

Source: Okuma America Corporation, September 27, 2026.

Okuma MB-4000H specifications

Figures as currently published; an older unit may differ in control generation and options.

1. manufacturer specification page, fetched October 14, 2026.

What fits an Okuma MB-4000H

Each of these follows from a published specification above, which is named beside it.

Okuma MB-4000H equipment and options

Options on the 20 Okuma MB-4000H units we tracked

• Pallet changer 7 of 20
• Chip conveyor 2 of 20
• Tool probe 2 of 20

What to check on an Okuma MB-4000H

• Control generation. The manufacturer specifies OSP-P500 for this model. Units we have tracked run 2011 to 2022; an early one may carry an older control or a retrofit.
• Spindle. The manufacturer gives a spindle speed of 50 ~ 15,000 [50 ~ 20,000] min⁻¹ (rpm). Run the spindle to top speed and listen for bearing noise.
• Spindle load. The manufacturer gives 26/18.5 [30/22] kW (34 / 25 [40 / 30] hp) of spindle power. Take a heavy cut and watch the load meter.
• Tool changer. The manufacturer gives the tool capacity as 48 [64, 110, 146, 182, 218] Multi-Magazine. Cycle every pocket and watch for a hesitation.
• Pallet changer. The manufacturer gives a pallet size of 400 x 400 mm (15.75 x 15.75 in). Run a full pallet change, and count the pallets and fixtures that come with the machine.
• Work envelope. The manufacturer gives max machining volume 560 x 560 x 625 mm (22.05 x 22.05 x 24.61 in). Measure your largest part, with its fixture, against that.

Okuma MB-4000H control and manuals

• Control OSP-P500

In a 2024 video, Okuma says its OSP control holds the machine manuals already loaded, so an operator can open them at the machine, and that other PDF files load onto it from a USB drive.

Source: Okuma America, October 24, 2026.

Okuma MB-4000H listing history

Where it was listed

Filed under CNC Horizontal Machining Centers (HMC) (19) and CNC Vertical Machining Centers (VMC) (4).

Model years seen

2022 ×2, 2021 ×2, 2019 ×2, 2018 ×3, 2017 ×4, 2016 ×4, 2014 ×2, 2013 ×3, 2012 ×3, 2011.

What Okuma MB-4000H listings agree on

What affects the value of a used Okuma MB-4000H

• Options. The units we tracked split on spindle power (40 hp on 8 machines, 25 hp on 2 machines) and spindle taper (CAT 40 Big Plus on 7 machines, CAT 40 on 4 machines).
• Control. The manufacturer specifies OSP-P500.
• Build year. The units we tracked were built from 2011 to 2022, across 10 model years.
• Against the published figures. The manufacturer gives max spindle speed 50 ~ 15,000 [50 ~ 20,000] min⁻¹ (rpm), spindle motor power 26/18.5 [30/22] kW (34 / 25 [40 / 30] hp), tool capacity 48 [64, 110, 146, 182, 218] Multi-Magazine and pallet size 400 x 400 mm (15.75 x 15.75 in).

Looking for an Okuma MB-4000H for sale?

We have tracked 27 Okuma MB-4000H listings on 10 marketplaces (machinetools.com, surplusrecord.com, usedcnc.com, equipt.com, exapro.com, cncmachines.com, gaec.com, premierequipment.com, revelationmachinery.com and theequipmenthub.com), model years 2011 to 2022. We buy Okuma MB-4000H machines and do not sell them.

2022 · 2021 · 2021 · 2019 · 2018 · 2018 · 2017 · 2017 · 2017 · 2016 · 2016 · 2016 · 2016 · 2014 · 2013 · 2013 · 2012 · 2012 · 2011 · year not given

Every Okuma MB-4000H we have tracked

The Okuma MB-4000H among machining centers and mills

Browse all CNC Horizontal Machining Centers (HMC), or see every Okuma machine we track.

Models related to the Okuma MB-4000H

Other CNC Horizontal Machining Centers (HMC) models in this directory