GF Machining Solutions 5-Axis Machining Centers

GF Machining Liechti g-Mill 850

$1,500,000 - $2,500,000 Updated 2026-03-19

Key Specifications

Max Spindle

30,000 RPM

Spindle Taper

HSK-A63

Tool Capacity

Weight

18,000 kg (39,683 lb)

Rapid Traverse

40 m/min (1,575 ipm)

Spindle Power

50 kW (67 hp)

Overview

The GF Machining Solutions GF Machining Liechti g-Mill 850 is a purpose-built 5-axis blisk/IBR machining center for aerospace jet engines and industrial gas turbines. Max part diameter: 850 mm (33.5 in). Target segment: mid-range blisks for narrow-body engines and LPC stages.

The machine’s kinematic architecture is fundamentally different from general-purpose 5-axis centers. Every axis travel, spindle approach angle, and structural element is optimized for deep inter-blade channels, consistent tool engagement on airfoil surfaces, and rigidity for superalloy forgings.

The spindle delivers 30,000 RPM with HSK-A63 interface. 50 kW (67 hp) power and 120 Nm torque handle both aggressive roughing and high-speed finishing of superalloys (Inconel 718, Waspaloy) and titanium (Ti-6Al-4V).

Liechti’s Turbosoft+ CAM generates airfoil-optimized tool paths — accounting for blade deflection, constant chip thickness, and smooth axis transitions. Siemens Sinumerik 840D sl manages simultaneous 5-axis interpolation for 0.02-0.05 mm airfoil tolerances.

Through-spindle coolant at 80 bar handles superalloy chip management. Pricing: approximately $1,500,000 - $2,500,000.

Full Specifications

Parameter	Value
Max Part Diameter	850 mm (33.5 in)
Number Of Axes	5-axis simultaneous
Max Spindle Speed	30,000 RPM
Spindle Taper	HSK-A63
Spindle Motor Power	50 kW (67 hp)
Spindle Torque	120 Nm
Tool Capacity	40
Rapid Traverse Rate	40 m/min (1,575 ipm)
Positioning Accuracy	0.003 mm (3 µm)
Cam Software	Liechti Turbosoft+
CNC Control	Siemens Sinumerik 840D sl
Coolant System	High-pressure through-spindle (80 bar)
Machine Weight	18,000 kg (39,683 lb)

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

Strengths & Limitations

Strengths

Purpose-built kinematics provide optimal tool approach angles for blisk machining that general-purpose machines cannot match
50 kW spindle at 30,000 RPM handles aggressive superalloy roughing and high-speed airfoil finishing
Turbosoft+ CAM generates blade-specific tool paths for thin-wall deflection and constant chip thickness — eliminating months of CAM development
850 mm part diameter covers the target blisk segment
80 bar through-spindle coolant ensures chip evacuation from deep inter-blade channels
Siemens 840D sl provides interpolation precision for complex simultaneous 5-axis blisk finishing

Limitations

Single-purpose design — only viable with consistent blisk/IBR volume
Turbosoft+ licensing adds cost and requires specialized training
At ,500,000 - ,500,000 requires OEM supply contracts to justify
Superalloy machining generates extreme tool wear costs

Best For

Aerospace engine OEMs producing fan blisks and compressor IBRs in Inconel and titanium IGT manufacturers machining compressor/turbine blisks for power generation MRO facilities performing blisk repair and re-profiling Defense contractors requiring in-house blisk capability Aerospace subcontractors building dedicated blisk cells