G550a

5-axis universal machining center

The G550a universal machining center meets the broadest range of part requirements, offering customers an exclusive entry to GROB milling technology.

High reliability and the option of modular expansion with automation packages make the G550a basic model the perfect solution for your efficient and cost-conscious production facility.

Mechanical engineering

Automotive

Die and Mold Industries

Technical data

Working travels

800/950/1,020

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

Max. speeds

60/42/60

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

Interference diameter

900

(mm)

All technical data

Chip-to-chip time t₁

4.8

according to VDI 2852 (s) relative to a rotational speed of 12,000 (rpm)

Positioning accuracy

0.006

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

Table diameter

770

(mm)

Table load

700/600

without/with pallet (kg)

Total weight

21,500/25,200

max. (kg) without/with pallet changer

Tool length with single disk-type tool magazine

465/-

HSK-A63 (mm) (outside/inside)

Tool length with compact double disk-type tool magazine

500/200

HSK-A100 (mm) (outside/inside)

The benefits at a glance

Short payback period

High productivity

Modularly expandable

Round-the-clock service

Flexible applications

Best machining quality

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 part to be swiveled and machined within the work area without collision – even in the case of machining with extremely long tools.

Large swivel range

Three linear and two rotary axes permit 5-sided machining, as well as 5-axis simultaneous interpolation, with a swivel range of 230 degrees in the A-axis and 360 degrees in the B-axis.

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Stiff spindle axis

with optimally positioned bearing close to the operating point

Unique overhead machining

with excellent chip fall and reduced thermal load in the part

Efficient machining cooling

Active cooling of heat-absorbing components/ assemblies

Small footprint

thanks to compact machine concept

Perfect view

of the machining operation through a laminated glass safety screen

Working with the familiar control system

Possibility to choose between SIEMENS and HEIDENHAIN machine control systems

G550a – Volume Machining

Reliable, automatable and cost-conscious:
The universal machining center G550a offers an
exclusive entry to GROB milling technology.

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Typical machining operations

Output carrier

Dimensions of raw material (mm)	Ø 174x36
Industry	Mechanical engineering
Material	C45
Motorized spindle	12,000 rpm
Power/torque	52 kW/83 Nm

Connecting rod

Dimensions of raw material (mm)	160x80x30
Industry	Mechanical engineering
Material	Steel
Motorized spindle	16,000 rpm
Power/torque	32 kW/206 Nm

Vise bottom part

Dimensions of raw material (mm)	415x130x115
Industry	Mechanical engineering
Material	Steel
Motorized spindle	9,000 rpm
Power/torque	65 kW/575 Nm

Housing

Dimensions of raw material (mm)	150x150x100
Industry	Mechanical engineering
Material	1.1191 / CK45
Motorized spindle	16,000 rpm
Power/torque	32 kW/205 Nm

Bearing housing

Dimensions of raw material (mm)	Cast blank
Industry	Mechanical engineering
Material	GG25
Motorized spindle	10,000 rpm
Power/torque	26 kW/345 Nm

Automation solutions

Rotary pallet storage system (PSS-R)

For up to 13 pallets with small footprint.

Part/pallet clamping system

for added flexibility

Pallet changer

for simple setup during the machining operation

Linear pallet storage system (PSS-L)

A highly automated, flexible manufacturing line for a wide variety of part machining.

Axis arrangement

Three linear and two rotary axes permit 5-sided machining, as well as 5-axis simultaneous interpolation.

The benefits to you

Optimally designed machining point (TCP) for extreme rigidity
Longest Z-travel path in this machine class
Extremely large swivel range of 230° in the A-axis
Largest possible part in the work area can be machined with maximum tool length

Spindle versions

Besides the broad range of spindles, the motorized spindles designed and produced by GROB itself are the preferred choice for optimized process design. These are optimally matched to the G550a and have optimized quality features.

Motorized spindles

HSK-A63, 83 Nm, 12.000 rpm
HSK-A63, 206 Nm, 16.000 rpm
HSK-A63, 47 Nm, 18.000 rpm
HSK-A100, 575 Nm, 9.000 rpm
HSK-A100, 340 Nm, 10.000 rpm

Available option packages

Basic machine

Decentralized work area extraction system
Automatic work area door

Tool magazine

Tool cleaning device
Electromechanical tool breakage detection device
Laser measurement system for milling tools
Tool coding

Accessories

Touch probe
Machine status light
3D model of the machine
SIEMENS or HEIDENHAIN hand-held controller

Cutting fluid system

Chip conveyor with cutting fluid filtration system (paper band filter) and internal cutting fluid supply
A choice of 3 different high-pressure cutting fluid systems (23, 5-40 and 10-80 bar)
Cooling unit for cutting fluid
Oil skimmer
Washing gun

Software options

Swivel axis calibration GSC
GROB inspection equipment set for improved kinematics

Service

Remote machine diagnostics with status control switch
Spare part basic package / expansion package