Machine Comparison
Okuma MULTUS B750 vs Okuma MULTUS U4000
Okuma vs Okuma · Mill-Turn Machines
Summary
The Okuma MULTUS B750 and Okuma MULTUS U4000 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. 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 B750 | Okuma MULTUS U4000 |
|---|---|---|
| Tool Capacity | 40 (options: 60, 80, 120, 160, 200) | 40 (standard); 80, 120, or 180 optional |
| Rapid Traverse | 30 m/min (X), 24 m/min (Z) | 30 m/min X; 20 m/min Y; 30 m/min Z |
| Max Turning Diameter | 1,050 mm (41.3 in) ▲ | 650 mm (25.6 in) |
| Control | Okuma OSP-P500 | OSP-P500 |
| Milling Spindle Speed | 10,000 RPM | 12,000 RPM ▲ |
| Machine Weight | 30,000 - 50,000 kg (66,139 - 110,231 lb) ▲ | 19,500 kg (42,990 lb) |
| Price Range | $1,000,000 - $2,000,000+ | $450,000 - $650,000 ▲ |
Advantages
Okuma MULTUS B750
- Superior max turning diameter at 1,050 mm (41.3 in) vs 650 mm (25.6 in)
- Superior machine weight at 30,000 - 50,000 kg (66,139 - 110,231 lb) vs 19,500 kg (42,990 lb)
- Backed by Okuma's dealer and service network for parts and support
- Oil and gas manufacturers machining long drill strings, riser components, and subsea equipment requiring turning and milling
Okuma MULTUS U4000
- Superior milling spindle speed at 12,000 RPM vs 10,000 RPM
- More competitive pricing at $450,000 - $650,000 compared to $1,000,000 - $2,000,000+
- Backed by Okuma's dealer and service network for parts and support
- Aerospace shops machining landing gear, structural components, and engine casings requiring turning and milling in one setup
Verdict
This is a close matchup. The Okuma MULTUS B750 and Okuma MULTUS U4000 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.