Machine Comparison
GROB G150 vs Makino a500iR
GROB vs Makino · 5-Axis Machining Centers
Summary
The GROB G150 from GROB and Makino a500iR from Makino are direct competitors in the 5-axis machining centers category. The GROB G150 leads in max spindle speed (18,000 rpm (30,000 rpm HSK-E40 optional) vs 14,000 RPM (20,000 RPM optional)). The Makino a500iR leads in x travel (560 mm (22.0 in) vs 450 mm (17.7 in)). The Makino a500iR leads in tool capacity (60 tools standard vs 48 (HSK-A63)). The Makino a500iR shows specification advantages in 5 categories, though the GROB G150 may still be the better choice depending on your shop's specific needs and the type of work you run. Both machines are proven performers in production environments and represent solid investments for shops in the market for a 5-axis machining center.
Specifications Comparison
| Specification | GROB G150 | Makino a500iR |
|---|---|---|
| X-Axis Travel | 450 mm (17.7 in) | 560 mm (22.0 in) ▲ |
| Y-Axis Travel | 400 mm (15.7 in) | 640 mm (25.2 in) ▲ |
| Z-Axis Travel | 400 mm (15.7 in) | 640 mm (25.2 in) ▲ |
| Max Spindle Speed | 18,000 rpm (30,000 rpm HSK-E40 optional) ▲ | 14,000 RPM (20,000 RPM optional) |
| Spindle Power | 16 kW (21 hp) continuous | 22 kW (29.5 hp) continuous ▲ |
| Tool Capacity | 48 (HSK-A63) | 60 tools standard ▲ |
| Rapid Traverse | 60 m/min (2,362 ipm) | 60 m/min (2,362 ipm) |
| Accuracy | +/- 0.004 mm | ±0.003 mm (±0.00012 in) |
| Control | Siemens Sinumerik 840D sl (Heidenhain TNC 640 optional) | Makino Professional 6 (Pro 6) |
| A Axis Range | +30° / -120° | +30° to -120° (150° total, direct drive) |
| B Axis Range | 360° continuous | 360° (continuous, direct drive) |
| Spindle Taper | HSK-A63 (HSK-E40 optional) | HSK-A63 |
| Price Range | $350,000 - $500,000 ▲ | $450,000 - $650,000 |
Advantages
GROB G150
- Higher maximum spindle speed of 18,000 rpm (30,000 rpm HSK-E40 optional) enables faster cutting on aluminum and non-ferrous materials
- More competitive pricing at $350,000 - $500,000 compared to $450,000 - $650,000
- Backed by GROB's dealer and service network for parts and support
- Aerospace component shops machining small structural parts, brackets, and fittings in aluminum and titanium requiring 5-axis access
Makino a500iR
- Greater x travel of 560 mm (22.0 in) accommodates larger workpieces
- Greater y travel of 640 mm (25.2 in) accommodates larger workpieces
- Greater z travel of 640 mm (25.2 in) accommodates larger workpieces
- More spindle power at 22 kW (29.5 hp) continuous for aggressive material removal in harder materials
- Larger tool magazine with 60 tools standard capacity reduces manual tool changes on complex parts
Verdict
The Makino a500iR edges ahead on specifications in this comparison, particularly in X Travel and Y Travel. However, the GROB G150 remains competitive and may be the better choice depending on price, dealer support in your area, or specific workholding and tooling considerations. Both are capable machines — the best decision comes from running your actual parts and evaluating total cost of ownership including tooling, training, and service.