Grob G 350 T

$700,000 - $1,000,000 Updated 2026-03-17

Key Specifications

X / Y / Z Travel

500 mm / 630 mm / 500 mm

Max Turning Diameter

630 mm

Max Workpiece Height

500 mm

Max Table Load

400 kg

Spindle Orientation

Horizontal

Spindle Speed (max)

17,500 rpm

Overview

The Grob G 350 T is the integrated turning variant of Grob G 350 5-axis universal machining center, combining proven simultaneous 5-axis milling capability with a high-torque turning function for complete done-in-one machining of complex rotational and prismatic components. The T designation indicates the addition of a torque-motor-driven rotary axis capable of sustained turning on steel, titanium, Inconel, and aluminum in the same setup as the 5-axis milling work.

Grob characteristic horizontal spindle orientation is retained on the G 350 T, providing gravity-assisted chip fall away from the workpiece and excellent chip management during both milling and turning. The B-axis swiveling table handles tilting motion while the A-axis rotary table provides the turning function. Grob direct-drive technology ensures high positioning repeatability and smooth surface finishes during turning at speeds up to 1,000 rpm.

With X/Y/Z travels of 500 mm x 630 mm x 500 mm and a maximum turning diameter of 630 mm, the G 350 T occupies the mid-range of Grob mill-turn lineup, positioned above compact G 150 T configurations and below the larger G 550 T. It is particularly well-suited to aerospace bracket and fitting production, medical implant manufacturing, and precision energy sector components where the combination of complex geometry and rotational features in one setup delivers clear cycle-time and accuracy advantages.

The G 350 T integrates with Grob automation solutions including the PSS-R pallet storage and handling systems and robot loading cells. The Heidenhain TNC 640 or Siemens Sinumerik ONE control provides seamless program switching between milling and turning modes, with dedicated mill-turn programming cycles simplifying NC programming for the combined process.

Full Specifications

Parameter	Value
X / Y / Z Travel	500 mm / 630 mm / 500 mm
Max Turning Diameter	630 mm
Max Workpiece Height	500 mm
Max Table Load	400 kg
Spindle Orientation	Horizontal
Spindle Speed (Max)	17,500 rpm
Spindle Motor Power	35 kW (S1)
Spindle Taper	HSK-A63
Turning Speed Range	1 - 1,000 rpm
B-Axis Swivel Range	+/-115 degrees
A-Axis	360 degrees (continuous, turning capable)
Feed Rate (Max)	60 m/min
Tool Magazine Capacity	42 tools (120 optional)
CNC Control	Heidenhain TNC 640 or Siemens Sinumerik ONE

Specifications sourced from grobgroup.com — verified 2026-03-28

Strengths & Limitations

Strengths

Integrated turning up to 1,000 rpm enables done-in-one machining of complex prismatic and rotational parts
Horizontal spindle provides gravity-assisted chip evacuation during both milling and turning
Direct-drive A-axis delivers smooth turning surface finish and high positional repeatability
Mid-range capacity (630 mm turning diameter, 400 kg load) suits the broadest range of aerospace and medical applications
Compatible with Grob PSS-R automation for unmanned multi-pallet production runs

Limitations

Turning speed capped at 1,000 rpm -- not a replacement for a dedicated turning center on high-speed operations
Horizontal spindle layout requires different fixturing strategies than more common vertical 5-axis platforms
Premium cost relative to the milling-only G 350 base machine

Best For

Aerospace brackets and fittings requiring both 5-axis milled geometry and precision turned bores or faces Orthopedic implants and medical device housings combining contoured surfaces and rotational features Precision energy sector components: valve bodies, pump impellers, and manifold blocks High-value contract machining where done-in-one capability reduces WIP and improves positional accuracy

Frequently Asked Questions

01 How does the Grob G 350 T differ from the standard G 350?

The G 350 T adds a torque-motor-driven turning function to the A-axis rotary table, enabling turning operations up to 1,000 rpm. The base machine geometry, travels, and spindle specifications are shared with the standard G 350. The T version costs approximately 20-30% more.

02 Why does Grob use a horizontal spindle on the G 350 T?

Grob horizontal spindle layout allows chips and coolant to fall away from the workpiece by gravity, improving chip evacuation and reducing re-cutting during both milling and turning operations. This is a consistent design philosophy across the Grob G-series lineup.

03 What turning operations can the G 350 T perform?

The G 350 T supports OD and ID turning, facing, grooving, threading, and contouring at up to 1,000 rpm on workpieces up to 630 mm in diameter. It is designed for complete done-in-one machining, not as a substitute for high-speed production turning.

04 Can the G 350 T be automated?

Yes. The G 350 T is compatible with Grob PSS-R pallet storage and handling system and robot loading interfaces. These enable automated loading and unloading of palletized workpieces for extended unmanned production runs common in aerospace and medical device manufacturing.

05 What CNC control options are available on the G 350 T?

The G 350 T is available with Heidenhain TNC 640 (with turning cycles) or Siemens Sinumerik ONE. Both provide seamless program integration for combined milling and turning operations, with mill-turn cycles that simplify NC programming for the combined process.