Machine Comparison
GROB G150 vs GROB G750
GROB vs Grob · 5-Axis Machining Centers
Summary
The GROB G150 and GROB G750 are both from GROB's 5-axis machining centers lineup, making this a common upgrade or lineup decision for shops already invested in the GROB ecosystem. The GROB G150 leads in max spindle speed (18,000 rpm (30,000 rpm HSK-E40 optional) vs 6,000 to 24,000 RPM (configuration dependent)). The GROB G750 leads in x travel (1,000 mm (39.4 in) vs 450 mm (17.7 in)). The GROB G750 leads in tool capacity (60 - 215 tools (configuration dependent) vs 48 (HSK-A63)). The GROB G750 shows specification advantages in 8 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 | GROB G750 |
|---|---|---|
| X-Axis Travel | 450 mm (17.7 in) | 1,000 mm (39.4 in) ▲ |
| Y-Axis Travel | 400 mm (15.7 in) | 1,300 mm (51.2 in) ▲ |
| Z-Axis Travel | 400 mm (15.7 in) | 1,500 mm (59.1 in) ▲ |
| Max Spindle Speed | 18,000 rpm (30,000 rpm HSK-E40 optional) ▲ | 6,000 to 24,000 RPM (configuration dependent) |
| Spindle Power | 16 kW (21 hp) continuous | Up to 55 kW (74 hp) ▲ |
| Tool Capacity | 48 (HSK-A63) | 60 - 215 tools (configuration dependent) ▲ |
| Control | Siemens Sinumerik 840D sl (Heidenhain TNC 640 optional) | Siemens SINUMERIK 840D sl |
| A Axis Range | +30° / -120° | 230° swivel ▲ |
| B Axis Range | 360° continuous | 360° continuous |
| Spindle Taper | HSK-A63 (HSK-E40 optional) | HSK-A63 or HSK-A100 |
| Max Workpiece Weight | 60 kg (132 lb) | 1,500 kg (3,307 lb) ▲ |
| Machine Weight | 6,500 kg (14,330 lb) | 25,000 - 28,000 kg (55,116 - 61,729 lb) ▲ |
| Price Range | $350,000 - $500,000 ▲ | $700,000 - $1,000,000 |
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 $700,000 - $1,000,000
- 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
GROB G750
- Greater x travel of 1,000 mm (39.4 in) accommodates larger workpieces
- Greater y travel of 1,300 mm (51.2 in) accommodates larger workpieces
- Greater z travel of 1,500 mm (59.1 in) accommodates larger workpieces
- More spindle power at Up to 55 kW (74 hp) for aggressive material removal in harder materials
- Larger tool magazine with 60 - 215 tools (configuration dependent) capacity reduces manual tool changes on complex parts
Verdict
The GROB G750 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.