GROB G552
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The GROB G552 is the pallet-changer variant of the G550, combining GROB's most popular large-envelope 5-axis universal machining center with an integrated dual-pallet system for automated production. With 800 x 780 x 780 mm (31.5 x 30.7 x 30.7 in) X/Y/Z travels and 600 x 600 mm pallets supporting workpieces up to 600 kg (1,323 lb), the G552 serves as the production workhorse for aerospace structural parts, large medical implant components, and precision mold work where both capability and throughput matter.
The motorized spindle delivers 41 kW (55 hp) continuous power at up to 16,000 rpm through an HSK-A63 interface, with optional HSK-A100 for heavy-duty applications requiring maximum rigidity and torque. GROB's horizontal spindle architecture with A/B trunnion table is the foundation — the A-axis swivels +30/-120 degrees while the B-axis provides 360-degree continuous rotation. This kinematic arrangement provides excellent part accessibility while keeping the workpiece close to the rotary center for optimal dynamic performance during 5-axis simultaneous contouring.
The dual-pallet system exchanges 600 x 600 mm pallets in approximately 20 seconds, enabling continuous production with operator setup happening in parallel with machining. The 80-position tool magazine (expandable to 120) accommodates the tooling diversity required for complex multi-operation aerospace parts. Combined with the Siemens Sinumerik 840D sl control and GROB4Pilot interface, the G552 delivers the automation and ease-of-use that production environments demand.
GROB's construction philosophy — thermally symmetric cast iron structure, roller linear guides, active temperature compensation, and the inherent chip evacuation advantage of horizontal spindle orientation — scales effectively to the G552's larger work envelope. The machine maintains +/- 0.005 mm positioning accuracy across all linear axes, even during extended production runs. New G552 machines are priced between $600,000 and $900,000, representing a meaningful premium over the base G550 but delivering significantly higher spindle utilization for shops running production volumes.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 800 mm (31.5 in) |
| Y-Axis Travel | 780 mm (30.7 in) |
| Z-Axis Travel | 780 mm (30.7 in) |
| A Axis Range | +30° / -120° |
| B Axis Range | 360° continuous |
| Max Spindle Speed | 16,000 rpm (20,000 rpm optional) |
| Spindle Taper | HSK-A63 (HSK-A100 optional) |
| Spindle Motor Power | 41 kW (55 hp) continuous |
| Pallet Size | 600 x 600 mm (23.6 x 23.6 in) |
| Number Of Pallets | 2 (dual pallet changer) |
| Max Workpiece Weight | 600 kg (1,323 lb) per pallet |
| Max Workpiece Diameter | Ø 700 mm (27.6 in) |
| Tool Capacity | 80 (expandable to 120) |
| CNC Control | Siemens Sinumerik 840D sl |
| Machine Weight | 18,500 kg (40,786 lb) |
| Floor Space Required | 3,800 x 4,500 mm (150 x 177 in) |
| Positioning Accuracy | +/- 0.005 mm |
| Rapid Traverse Rate | 50 m/min (1,969 ipm) |
| X | 31.49" |
| Y | 40.15" |
| Z | 38.18" |
| Power | 42.9 hp |
| Rpm | 16,000 RPM |
| Atc | 140 |
| Taper | HSK-A63 |
| Pallet W | 24.8" |
| Pallet L | 24.8" |
| Axis | 5 |
| Cnc Control | CNC (Siemens Sinumerik 840 D) |
| Condition | New - In-Stock |
| Loading | New |
| Type | 5-Axis Horizontal Machining Centers |
| Model | G552 |
| Stock | 305349 |
| Status | For Sale |
| Serial | 20029 |
| Country | United States |
| Imperial | Metric |
Specifications sourced from grobgroup.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Combines the G550's proven 5-axis capability with integrated pallet changing — the most productive standard GROB 5-axis platform for medium-large parts
- 600 x 600 mm pallets with 600 kg capacity handle substantial aerospace structural parts and large mold components without external automation
- 41 kW spindle with HSK-A63 or optional HSK-A100 taper provides flexibility between high-speed aluminum work and heavy titanium/steel machining
- 80-to-120 position tool magazine supports extended unmanned production runs on complex multi-operation parts
- Horizontal spindle orientation with gravity chip evacuation is increasingly important at this work envelope size — chip volume management is effortless
- Pallet exchange system increases spindle utilization by 20-25% over the single-table G550 with minimal increase in footprint
Limitations
- At $600K-$900K, the G552 requires a strong production backlog to justify the investment premium over the base G550
- 600 kg per-pallet workpiece limit may be restrictive for heavy steel mold bases — the G600 offers higher capacity
- Two-pallet system is a starter automation level — high-volume production shops may ultimately need a full PSS-G pallet pool
- 18,500 kg machine weight and 3,800 x 4,500 mm footprint require careful facility planning and potential floor reinforcement
- Siemens Sinumerik control ecosystem requires Siemens-trained staff and compatible CAM post processors
Best For
Frequently Asked Questions
01
The G552 adds an integrated dual-pallet changer to the G550 platform. Both share identical axis travels, spindle options, and 5-axis kinematics. The G552 uses 600 x 600 mm pallets that exchange in approximately 20 seconds, enabling part setup during cutting. The G550 uses a single rotary table. The G552 costs roughly 20-25% more but delivers significantly higher spindle utilization. The G552's footprint is only slightly larger than the G550.
02
Both are large 5-axis machines with integrated pallet changing. The DMG MORI DMU 80 eVo uses a vertical spindle with swivel rotary table, while the G552 uses GROB's horizontal spindle with A/B trunnion. The GROB's horizontal orientation provides better chip evacuation and thermal stability. The DMG MORI offers a wider range of spindle options and a larger global service network. Pricing is comparable in the $600K-$900K range. The choice often comes down to spindle orientation preference and existing control platform standardization.
03
With two pallets, the G552 can run two consecutive part setups unattended. For parts with 2+ hour cycle times, this provides 4+ hours of unmanned operation. The 80-to-120 tool magazine capacity, through-spindle coolant, and tool breakage detection support extended unmanned runs. For full overnight unmanned operation, integrating the G552 with a GROB PSS-G pallet pool system with 4-10 pallets provides the part capacity needed for 8-12 hours of lights-out machining.
Videos
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