Machine Comparison
Makino a120nx vs OKK HM1000S
Makino vs OKK Corporation · Horizontal Machining Centers
Summary
The Makino a120nx and the OKK HM1000S are both large 50-taper horizontal machining centers for heavy castings, housings and frames. The Makino is the bigger machine: 1,900 x 1,600 x 1,700 mm of travel against 1400 x 1100 x 1000 mm, and a 3,000 kg standard workpiece load (5,000 kg as an extra-cost option) against 2500 kg.
The OKK answers with spindle speed. Its standard spindle runs to 12000 min-1, with an 8000 min-1 spindle offered as an option, while the Makino a120nx is 8,000 rpm as standard and reaches 20,000 only with an optional spindle. The Makino has the faster rapids, 54,000 mm/min against 48 m/min, and its 1,000 mm x 1,000 mm pallet can be ordered as 1,250 x 1,000 mm; the OKK HM1000S carries a ⌀1000 mm pallet.
Specifications Comparison
| Specification | Makino a120nx | OKK HM1000S |
|---|---|---|
| X-Axis Travel | 1,900 mm (74.8 in) ▲ | 1400 mm |
| Y-Axis Travel | 1,600 mm (63.0 in) ▲ | 1100 mm |
| Z-Axis Travel | 1,700 mm ▲ | 1000 mm |
| 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)) | ⌀1000 mm |
| Max Table / Workpiece Load | 3,000 kg (Optional 5,000 kg) (6,600 lb (Optional 11,000 lb)) ▲ | 2500 kg |
| Max Spindle Speed | 8,000 rpm (Optional 20,000) | 12000 min-1 (OP: 8000 min-1) ▲ |
| Spindle Taper / Nose | CAT50 (HSK-A100 optional) | No. 50 |
| Rapid Traverse | 54,000 mm/min ▲ | 48 m/min (X, Y, Z) |
Advantages
Makino a120nx
- 1,900 x 1,600 x 1,700 mm of X/Y/Z travel against 1400 x 1100 x 1000 mm
- 3,000 kg standard workpiece load, 5,000 kg as an extra-cost option, against 2500 kg
- 54,000 mm/min rapid traverse against 48 m/min
- Optional 1,250 x 1,000 mm pallet and optional HSK-A100 spindle taper
OKK HM1000S
- 12000 min-1 standard spindle against the Makino a120nx's 8,000 rpm standard
- 8000 min-1 spindle offered as an option on the same No. 50 taper
- Suits multi-side boring and facing of large prismatic castings that fit 1400 x 1100 x 1000 mm
Verdict
Size the machine to the part. The Makino a120nx is the choice for the largest work: 1,900 mm of X travel, a 3,000 kg load that rises to 5,000 kg with the optional rating, and 54,000 mm/min rapids. The OKK HM1000S fits castings and housings within 1400 x 1100 x 1000 mm and 2500 kg, and its 12000 min-1 standard spindle suits shops that want more speed than the Makino's 8,000 rpm without ordering an optional spindle.