Machine Comparison
Okuma MULTUS B300II vs Okuma MULTUS B400II
Okuma vs Okuma · Mill-Turn Machines
Summary
The Okuma MULTUS B300II and Okuma MULTUS B400II are both from Okuma's mill-turn machines lineup, making this a common upgrade or lineup decision for shops already invested in the Okuma ecosystem. The Okuma MULTUS B400II leads in tool capacity (40 (options: 60, 80, 120) vs 20 tools). These machines are closely matched across most specifications, making the decision more about specific feature priorities, dealer support, and your existing shop ecosystem than raw spec advantages. Both machines are proven performers in production environments and represent solid investments for shops in the market for a mill-turn machine.
Specifications Comparison
| Specification | Okuma MULTUS B300II | Okuma MULTUS B400II |
|---|---|---|
| Tool Capacity | 20 tools | 40 (options: 60, 80, 120) ▲ |
| Control | Okuma OSP-P500M | Okuma OSP-P300SA |
| Main Spindle Speed | 5,000 RPM ▲ | 3,800 RPM |
| Main Spindle Power | 15/11 kW (20 min/continuous) (20/15 hp) | 30/22 kW (40/30 hp) ▲ |
| Price Range | $350,000 - $550,000 ▲ | $500,000 - $750,000 |
Advantages
Okuma MULTUS B300II
- Superior main spindle speed at 5,000 RPM vs 3,800 RPM
- More competitive pricing at $350,000 - $550,000 compared to $500,000 - $750,000
- Backed by Okuma's dealer and service network for parts and support
- Aerospace shops machining complex shaft and fitting components requiring both turning and milling features in tight-tolerance single setups
Okuma MULTUS B400II
- Larger tool magazine with 40 (options: 60, 80, 120) capacity reduces manual tool changes on complex parts
- Superior main spindle power at 30/22 kW (40/30 hp) vs 15/11 kW (20 min/continuous) (20/15 hp)
- Backed by Okuma's dealer and service network for parts and support
- Aerospace manufacturers machining long landing gear components, actuator housings, and engine shafts requiring turning and milling
Verdict
This is a close matchup. The Okuma MULTUS B300II and Okuma MULTUS B400II trade advantages across different specifications, making neither a clear winner on paper alone. Your decision should come down to practical factors: which dealer is closer, which control system your operators already know, what tooling ecosystem you're invested in, and which machine's specific strengths match your highest-volume work. Get quotes on both, run test cuts with your actual parts if possible, and factor in long-term service and support costs.