Machine Comparison
Okuma MULTUS B200II vs Okuma Multus B250II
Okuma vs Okuma · Mill-Turn Machines
Summary
The Okuma MULTUS B200II and the Okuma Multus B250II are Okuma mill-turn machines with the same 600 mm (23.62 in) maximum turning diameter. They differ at the main spindle. The Okuma MULTUS B200II runs faster, 50 to 6,000 rpm against 45–5,000 rpm, and a 45 to 5,000 rpm spindle is listed for it as an extra-cost option. The Okuma Multus B250II has twice the power: 22/15 kW (30/20 hp) against 11/7.5 kW (15/10 hp).
The spindle nose is close to common. The Okuma MULTUS B200II has a Ø140 flat nose, with JIS A2-6 listed in brackets as the alternative; the Okuma Multus B250II has JIS A2-6.
Specifications Comparison
| Specification | Okuma MULTUS B200II | Okuma Multus B250II |
|---|---|---|
| Max Turning Diameter | 600 mm (23.62 in) | 600 mm (23.62 in) |
| Max Spindle Speed | 50~6,000 min⁻¹ [45~5,000 min⁻¹ optional] ▲ | 45–5,000 rpm |
| Spindle Power | PREX 11/7.5 kW (15/10 hp), 20 min/cont | 22/15 kW (30/20 hp) ▲ |
| Spindle Taper / Nose | Ø140 flat [JIS A2-6] | JIS A2-6 |
Advantages
Okuma MULTUS B200II
- 6,000 rpm top spindle speed against 5,000 rpm
- Suited to small shafts and bar parts, where spindle speed matters more than power
Okuma Multus B250II
- Twice the spindle power: 22/15 kW (30/20 hp) against 11/7.5 kW (15/10 hp)
- Suited to steel shafts and chucked parts where turning power matters
Verdict
Both machines turn up to 600 mm (23.62 in), so the choice is speed against power. The Okuma MULTUS B200II suits small shafts and bar parts that benefit from 6,000 rpm and do not need more than 11/7.5 kW (15/10 hp). The Okuma Multus B250II suits steel shafts and chucked parts where turning power matters: it has 22/15 kW (30/20 hp) and tops out at 5,000 rpm. Shops cutting mostly steel at larger diameters should take the Okuma Multus B250II.