Machine Comparison
GROB G150 vs Grob G350
GROB vs Grob · 5-Axis Machining Centers
Summary
The GROB G150 and Grob G350 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 16,000 RPM standard (up to 21,000 RPM optional)). The Grob G350 leads in x travel (600 mm (23.6 in) vs 450 mm (17.7 in)). The Grob G350 leads in tool capacity (60 tools standard (up to 365 optional) vs 48 (HSK-A63)). The Grob G350 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 G350 |
|---|---|---|
| X-Axis Travel | 450 mm (17.7 in) | 600 mm (23.6 in) ▲ |
| Y-Axis Travel | 400 mm (15.7 in) | 855 mm (33.7 in) ▲ |
| Z-Axis Travel | 400 mm (15.7 in) | 750 mm (29.5 in) ▲ |
| Max Spindle Speed | 18,000 rpm (30,000 rpm HSK-E40 optional) ▲ | 16,000 RPM standard (up to 21,000 RPM optional) |
| Spindle Power | 16 kW (21 hp) continuous | 39 kW (52 hp) ▲ |
| Tool Capacity | 48 (HSK-A63) | 60 tools standard (up to 365 optional) ▲ |
| Accuracy | +/- 0.004 mm | 0.006 mm (0.00024 in) |
| 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 |
| Max Workpiece Weight | 60 kg (132 lb) | 400 kg (882 lb) ▲ |
| Machine Weight | 6,500 kg (14,330 lb) | 15,300 kg (33,730 lb) without pallet changer; 17,500 kg (38,581 lb) with pallet changer ▲ |
| Price Range | $350,000 - $500,000 ▲ | $400,000 - $550,000 |
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 $400,000 - $550,000
- 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 G350
- Greater x travel of 600 mm (23.6 in) accommodates larger workpieces
- Greater y travel of 855 mm (33.7 in) accommodates larger workpieces
- Greater z travel of 750 mm (29.5 in) accommodates larger workpieces
- More spindle power at 39 kW (52 hp) for aggressive material removal in harder materials
- Larger tool magazine with 60 tools standard (up to 365 optional) capacity reduces manual tool changes on complex parts
Verdict
The Grob G350 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.