G750T

5-axis mill-turn universal machining center

The G750T mill-turn machining center is designed to machine large parts from the most diverse materials with incredible stability and precision down to the very last detail.

See for yourself the high productivity and outstanding quality of GROB mill-turn machines and employ the G750T to get the best out of your manufacturing facility.

Aerospace

Mechanical engineering

Energy technology

Technical data

Working travels

1,000/1,100/1,175

in X-/Y-/Z-axis (mm)

Max. speeds

60/50/75

in X-/Y-/Z-axis (m/min)

Interference diameter

1,280

(mm)

All technical data

Chip-to-chip time t₁

3.8

according to VDI 2852 (s) relative to speed (rpm)

Positioning accuracy

0.006

in X-/Y-/Z-axis (mm)

Table diameter

950

(mm)

Table load

1,500/1,000

without/with pallet (kg)

B-axis speed

500

n(min_max)

Total weight

34,500

(kg)

Tool length for double disk-type tool magazine HSK-A/T63

400/650

(front/back) (mm)

The benefits at a glance

High productivity

Optimized availability

High visibility

Flexible applications

Maintainable

Compact design

Optimized access

Round-the-clock service

Unique machine concept

Horizontal spindle position

The horizontal spindle position permits the longest possible Z-travel path and optimum chip fall.

Maximum stability

The unique arrangement of the three linear axes minimizes the distance between the guides and the machining point (TCP), lending the machine considerable stability.

Tunnel concept

The tunnel concept allows the largest possible component – even in the case of with extremely long tools – to be swiveled and machined within the work area without collision.

Large swivel range

Three linear and two rotary axes permit 5-sided machining, 5-axis simultaneous interpolation as well as GROB TRAORI turning. With a swivel range of 230 degrees in the A-axis and 360 degrees in the B-axis, these machines offer the greatest possible positioning flexibility.

GROB state-of-the-art technology

Horizontal 5-axis concept

Three linear and two rotary axes permit 5-sided simultaneous machining

Mill-turn table

Almost limitless machining potentials thanks to the largest possible swivel range

Chip disposal

Uninterrupted part machining with chip disposal by a slat band conveyor

Machine bed

Intrinsically stiff welded design for optimum machine rigidity

Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

G750T – Perfect machining of large parts

Our G750T mill-turn machining center in action.

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G750T – Perfect machining of large parts

Typical machining operations

Tilting table

Dimensions of raw material (mm)	Cast blank
Industry	Mechanical engineering
Material	GG25
Motorized spindle	10,000 rpm

Francis turbine wheel

Dimensions of raw material (mm)	Ø 800x250
Industry	Energy technology
Material	Chromium-nickel steel
Motorized spindle	10,000 rpm
Power/torque	66 kW/340 Nm

Mill-turn tables

To provide you with the best possible support for meeting the requirements of your mill-turn operations, GROB offers tables, optimized specifically for mill-turn operations, with significantly higher maximum speeds than pure universal milling machining centers.

Mill-turn table T-slots arranged in a star shape (standard)

Mill-turn table with pallet clamping system (option)

Spindle versions

To optimize the process design of your mill-turn operations, GROB offers mill-turn motorized spindles developed specifically for this purpose.

Motorized spindle versions

HSK-A/T100, 340 Nm, 10,000 rpm
HKS-A/T63, 206 Nm, 16.000 rpm
HSK-A/T100, 261 Nm, 14.500 rpm

GROB Spindle Diagnostics (GSD)

GROB spindle diagnostics is a system that automatically monitors the condition of the motorized spindle. Benefits are a prolonged motorized spindle useful life, reduced tool wear and scheduled maintenance.

Tool magazine

GROB tool magazine technology is set apart by fast chip-to-chip times, a smaller space requirement and optimized accessibility. Choose the right solution for you.

Doube disk-type tool magazine
Three disk magazine
Additional tool magazine

Automation solutions

Draw on the experience we have garnered over several decades and benefit from the automation technology we tailor to meet your needs – from solutions with part storage systems to highly flexible manufacturing lines.

Customer-specific automation solution

The tougher requirements in the automation sector call for individual solutions tailored to the customer's specific needs. GROB offers such solutions, from customized part handling through to flexible manufacturing lines with multiple machines and centralized tool supply.

Software options

Use the GROB software solutions to optimize and analyze the machine kinematics of the G750T and minimize deviations down to the finest detail.

GROB swivel axis calibration (GSC)

For highly precise machine calibration and control-specific kinematic cycles. The GSC achieves a much higher level of accuracy than standard calibration cycles without using swivel cycles.

GROB kinematic measurement inspection equipment set

In addition to the kinematic measuring cycles, all measuring instruments are supplied in an inspection equipment set.

Interpolation turning PLUS

The interpolation turning PLUS software solution enables any turning operations on the G750T. Because both new and standard tools can be used, it remains economical at all times and is the ideal solution for prototype and small series production.

Energy efficiency package

For efficient use of energy by reducing the power consumption of the G750T (with SIEMENS control system).

Gear hobbing

For individual corrections and block entry at any cut, gear hobbing is a suitable process for external gearing and gearing on shafts.

Gear skiving

For perfect external and internal gearing with power skiving machines. Frontal part access required for hob peeling.

GROB TRAORI turning

GROB TRAORI turning leads to a dynamic alignment of the tool cutting edge to the contour of the turned part in consideration of tool length and tool radius. Consequently, a significantly longer service life is achieved and short tools can be used.