Machine Comparison
Nakamura-Tome NTJ-100 vs Okuma MULTUS B200II
Nakamura-Tome vs Okuma · Mill-Turn Machines
Summary
The Nakamura-Tome NTJ-100 and the Okuma MULTUS B200II are both mill-turn machines with B-axis capability, but they are different size classes and serve different jobs. The NTJ-100 has a 175 mm (6.9 in) maximum turning diameter; the MULTUS B200II has 600 mm (23.62 in).
Spindle ratings are the same at 11 / 7.5 kW, listed for the Okuma as PREX 11/7.5 kW (15/10 hp), 20 min/cont. The Okuma spindle runs to 6,000 min⁻¹ against 5,000 rpm on the NTJ-100. Floor space is 3,799 × 2,110 × 2,565 mm for the Nakamura-Tome against 3,080 × 2,210 × 2,582 mm, or 3,620 × 2,210 × 2,582 mm in its second configuration, for the Okuma. The verified table gives no travel or tool figures for these two.
Specifications Comparison
| Specification | Nakamura-Tome NTJ-100 | Okuma MULTUS B200II |
|---|---|---|
| Max Turning Diameter | 175 mm (6.9 in) | 600 mm (23.62 in) ▲ |
| Max Spindle Speed | 5,000 rpm (Ø65 mm option: 4,500 rpm) | 50~6,000 min⁻¹ [45~5,000 min⁻¹ optional] ▲ |
| Spindle Power | 11 / 7.5 kW | PREX 11/7.5 kW (15/10 hp), 20 min/cont |
| Floor Space | 3,799 × 2,110 × 2,565 mm (W × D × H) | 3,080 × 2,210 × 2,582 mm (121.26 × 87.01 × 101.65 in); 3,620 × 2,210 × 2,582 mm (142.52 × 87.01 × 101.65 in) |
Advantages
Nakamura-Tome NTJ-100
- Aimed at small aerospace and medical parts with angled holes and compound-angle features
- Simultaneous cutting for medium-batch complex parts
Okuma MULTUS B200II
- 600 mm (23.62 in) maximum turning diameter against 175 mm (6.9 in)
- 6,000 min⁻¹ spindle against 5,000 rpm
- Smaller standard floor space: 3,080 × 2,210 mm against 3,799 × 2,110 mm
Verdict
Choose by part diameter. The Okuma MULTUS B200II handles chucked parts up to 600 mm and, in its standard form, on a smaller footprint, so it suits shops taking on multitasking work for the first time. The Nakamura-Tome NTJ-100 is the specialist for small aerospace and medical parts within 175 mm that need angled holes and compound-angle features, where simultaneous cutting is the point.