Machine Comparison
Okuma Multus B250II vs Okuma MULTUS B300II
Okuma vs Okuma · Mill-Turn Machines
Summary
The Okuma Multus B250II and the Okuma MULTUS B300II are neighboring models in Okuma's mill-turn range. Okuma publishes few comparable figures for this pair, so the table has three rows: turning diameter, spindle power and spindle nose.
The Okuma MULTUS B300II takes the larger part, with a maximum turning diameter of 630 mm (24.80 in) against 600 mm (23.62 in). The Okuma Multus B250II lists the stronger main spindle, 22/15 kW (30/20 hp) against 15/11 kW (20/15 hp). Both use a JIS A2-6 spindle nose as standard; the Okuma MULTUS B300II also lists a JIS A2-8 nose as an option.
Specifications Comparison
| Specification | Okuma Multus B250II | Okuma MULTUS B300II |
|---|---|---|
| Max Turning Diameter | 600 mm (23.62 in) | 630 mm (24.80 in) ▲ |
| Spindle Power | 22/15 kW (30/20 hp) ▲ | VAC 15/11 kW (VAC 20/15 hp) |
| Spindle Taper / Nose | JIS A2-6 | JIS A2-6 [JIS A2-8] |
Advantages
Okuma Multus B250II
- 22/15 kW (30/20 hp) spindle against 15/11 kW (20/15 hp)
- Described for steel shafts and chucked parts where turning power matters
Okuma MULTUS B300II
- 630 mm (24.80 in) maximum turning diameter against 600 mm (23.62 in)
- Optional JIS A2-8 spindle nose for bigger bar and chucks; the Okuma Multus B250II lists JIS A2-6 only
Verdict
On the published figures, pick by cut and diameter. The Okuma Multus B250II suits steel shafts and chucked parts where turning power matters, with 22/15 kW (30/20 hp) at the spindle. The Okuma MULTUS B300II suits larger-diameter, lighter-cut work up to 630 mm (24.80 in), and shops that want bigger bar and chucks can order its JIS A2-8 nose option. With three rows published, the choice rests on spindle power against diameter.