Machine Comparison
Makino a120nx vs Okuma MA-12500H
Makino vs Okuma · Horizontal Machining Centers
Summary
The Makino a120nx and the Okuma MA-12500H are both large 50-taper horizontal machining centers built for big castings, housings and structural parts. The makers publish few comparable figures for this pair, so the comparison rests on four rows: pallet size, spindle taper, tool capacity and rapid traverse.
The Okuma carries the larger standard pallet, 1,250 × 1,250 mm against the a120nx's 1,000 mm x 1,000 mm, which offers 1,250 x 1,000 mm as an option. The Makino rapids faster, 54,000 mm/min against 42 m/min (1,654 ipm). Both use a 50-taper spindle, CAT50 on the Makino (HSK-A100 optional) and No. 50 on the Okuma. Magazines are listed as 204 tools on the a120nx and 81 on the MA-12500H, with 129 and 177 as Okuma options.
Specifications Comparison
| Specification | Makino a120nx | Okuma MA-12500H |
|---|---|---|
| Pallet Size | 1,000 mm x 1,000 mm (Optional 1,250 x 1,000 mm) (39.4 in x 39.4 in (Optional 49.2 in x 39.4 in)) | 1,250 × 1,250 mm (49.21 × 49.21 in) |
| Spindle Taper / Nose | CAT50 (HSK-A100 optional) | No. 50 |
| Tool Capacity | 204 | 81 [129, 177] |
| Rapid Traverse | 54,000 mm/min ▲ | 42 m/min (1,654 ipm) |
Advantages
Makino a120nx
- 54,000 mm/min rapid traverse against 42 m/min (1,654 ipm)
- HSK-A100 spindle nose available as an option alongside CAT50
Okuma MA-12500H
- 1,250 × 1,250 mm standard pallet against 1,000 mm x 1,000 mm
- Standard pallet larger in both directions than the a120nx's 1,250 x 1,000 mm option
Verdict
With only four comparable rows, the choice comes down to pallet and speed. The Okuma MA-12500H suits parts that need a 1,250 × 1,250 mm pallet as standard, such as large gear housings and machine bases, and shops replacing floor-type boring mills. The Makino a120nx suits large castings that fit a 1,000 mm x 1,000 mm pallet and benefit from its 54,000 mm/min rapids and 204-tool magazine.