G-SERIES5-AXIS UNIVERSAL

MACHINING CENTERG750T

3

G750T

optimal chip disposal disc tool

magazine

machining spindle

cross-slide (x/z axis)

fluid plate

The G750T Universal Machining Center adds another product to our universal machine program. The extremely rigid construction of the machine base allows our customers to ef-ficiently manufacture workpieces made from a wide variety of materials – from plastic to

titanium – in small or medium-sized batches. They can rely on the same requirements de-manded in high-volume production: good access for maintenance, small footprint, as well as good visibility into the working area are only some of the outstanding features.

G for GENIUSG for GENIUS

If you need a Universal Machining Center to machine all 5 sides simulta-neous in 5 axes with the highest requirements for:

• EFFICIENCY• AVAILABILITY• MAINTAINABILITY• FLEXIBILITY • OPERATOR CONVENIENCE

Our G750T offers you the best solution and meets all your demands.

The G750T – A Universal Machining Center designed with the quality and expertise gained from our turnkey production systems business.

Outstanding technology from Outstanding technology from GROB in a confined spaceGROB in a confined space

4 5

YOUR ADVANTAGEHORIZONTAL SPINDLE – COMPACT – ACCESSIBLE – ENERGY-EFFICIENT

Horizontal 5-axis concept Even with the longest tool in the working

spindle the maximum component size can be swung and processed collision free. The rotating and swing points inside the working area are arranged in such a way that only small compensation movements in the 5-axis positioning are necessary.

Base • The machine base as well as most of the

components are self-supporting rigid welded constructions.

• The Y axis slide, rotary table housing, and spindle housing are cast iron constructions.

• The machine is placed and adjusted on seven leveling elements. Seven more leveling elements provide the machine with addi-tional stability.

Axis control The three linear and two rotary axes allow 5-side machining as well as 5-axis simultaneous interpolation.The machine offers an extremely large swivel range in the A-axis with 225 degrees.

Modern technology GROB As all GROB machines, the G750T has a

high dynamic range up to an axis speed of 75 m / min and an acceleration of 7.5 m / s². Tool changing takes place completely out of the working area. One large mass ensures high damping and allows for maximum ma-terial removal.

Energy efficiency Energy recovering, smart shutdown strate-

gies, synchronous spindle technology, as

well as demand based machine cooling are already incorporated in the basic machine configuration. Further designs, such as fre-quency-controlled high pressure supply or a fully hydraulic free machine are optional.

Optimal flexibility The G750T is an Universal Machining Center

that can be configured to your required application.

Controls The G750T uses convenient and userfriendly

controls of the newest generation: • SIEMENS 840D sl

High efficiency The G750T has been designed, as all

machines of the G-Series, for optimum wet and dry machining. The compact machine design requires only a small footprint.

Increasing the tool capacity Additional tool magazines increase the tool

capacity of the basic machine and offer optimum flexibility.

Optional automation There is a pallet changer and/or a pallet stor-

age option available for automatic workpiece exchanges.

Integrated coolant system Even the standard version includes a

1,075 liter coolant system with a paper band filter and internal coolant supply with 23 bar. Optional varieties with 38 or 80 bar (infinitely programmable) are also available.

POWERFUL ADVANTAGES

Intelligent chip management Best available chip disposal through an upside down

table position and central positioned chip conveyor directly under the machining operation.

• Chips are not lying on the clamping fixture • Direct free fall of chips • Increase of the tool life • Higher surface finish quality

Glass scales and rotary encodes By way of our encoders with air purge for all axes, we

ensure quality from the very first use. • High positioning accuracy according to

ISO 230-2 of 0.006 mm. • All machine reference marks available immediately

after booting the controller.

Optimal temperature control by a chiller unit Included in the basic machine configuration, the

chiller unit is used to chill the: • Motorized spindle • Electrical cabinet • A-/B-axis drive • Z-axis drive • Coolant system

Linear drive in the X and Z axes Wear-free and non-contact drive system in the most

traversed axes. Short tool changing times due to high dynamics.

Balance cycle Basic cycle-run balances your fixture and workpiece.

Two-stage option of balancing quality, especially for the finish process.

Motorized spindle with Hirth coupling During the turning process, the motorized spindle is blocked to decouple the bearings in a Hirth coupling.

SPECIAL FEATURES

YOUR GROB SERVICE– Worldwide service network– 24 hours, 7 days a week

– Machine remote diagnosis – Customer training

76

A/B axis

AXIS ARRANGEMENT

MACHINE FEATURES

MAXIMUM WORKPIECE ENVELOPE

MAXIMUM WORKPIECE ENVELOPE WITH PALLET CHANGERWITH PALLET CHANGER

Workpiece envelope top view (max.) [mm]Workpiece envelope A-Axis 0° (max.) [mm]Workpiece envelope AB-Axis (max.) [mm]

Ø 1,280

1,00

5

Center A-Axis

60

50

sphere R725

top edge ofrotary table

Ø 1,280

835

450.

6

Center A-Axis

60

50

Workpiece envelope top view (max.) [mm]

Ø 1,200

930

Workpiece envelope A-Axis 0° (max.) [mm]Workpiece envelope AB-Axis (max.) [mm]

sphere R675

Center A-Axis

top edge of pallet

Ø 1,200

675

309.

2

Ø 1,280

Ø 1

,200

110

110

Ø 895

790

G750T MACHINE

Side view

G750T WITH PALLET CHANGER

G750T WITH AN ADDIT IONAL TOOL MAGAZINE AND A COOLANT CHILL ING UNIT

Top view

ca. 5

500

ca. 7100

ca. 6

500

ca. 7750

ca. 3

750

101

ca. 3

750

101

ca. 3

750

ca. 8

600

101

Side view

Side view

Top view

Top view

Coolant chilling unit

Additional tool magazine

ca. 1

500

ca. 1

500

ca. 7750

8 9

BASIC EQUIPMENT

Tool cleaning device Combined, GROB-patented brushing / blow-off unit in

the tool magazine to clean the plain and the taper sur-face of the tool holder parallely to the processing time.

Separate flush and blow gun Two separate flush guns with coolant and / or air are

available at the operator's position for cleaning the work area, fixture, and clamping surface.

Combined tool measurement system System, located in the work area, used for contactless measuring of milling tools. In addition there is a mechanical tactile system to measure turning tools.

Tool breakage control A mechanical tool breakage detection device is

integrated in the tool magazine.

Handheld controller Keys for tool data entry and for pre-selection of axis

movement. Controller can be repositioned to the operating side (Main control panel).

Tool coding Read/write unit installed at the tool loading position for

tools with a memory chip.

Machine remote diagnosis Machine remote diagnosis for the support of your

control, maintenance, and repair tasks, works after activation of the Internet connection and installation of the tele service software.

GROB spindle diagnostic (GSD) Integrated electronic diagnostic system for spindle vibra-

tion and imbalance monitoring, as well as automatic bearing analysis.

Chip-in-Spindle Detection (SiS) Reliable detection of any chips between the tool holder

and the spindle; up to a chip thickness of 10 µm.

GROB kinematic measurement inspection equipment In addition to the cycles KinematicsOpt (HEIDENHAIN), cycle 996 (SIEMENS) or GSC (GROB), all measuring instruments are supplied in a hard shell case to provide the best protection.

Measuring probes including all of the preparations • HEIDENHAIN • RENISHAW • M&H

ACCESSORIES

High pressure coolant through spindle

Tool magazineFlushing of the machining area

8

Fluid cabinet Chip conveyor and integrated coolant system

HSK-T100– Segmented plain surface equipped with air blow off

10

STAGES

AUTOMATION

TECHNICAL DATA

Subject to technical change.* With limit inside the working area

ALL DATA AT A GLANCE

Set up station and HMI on a linear pallet storage system.

Linear pallet storage … for automatic loading of machines up to 12 pallets..

Additional tool magazine The additional tool magazine increases the

basic machine tool capacity. • The additional tool magazine can be loaded

with tools during the machining process. If the tool for the next working operation is already in the disc magazine, the main time of the basic machine is not influenced.

• The preparation and management of the additional tools in the magazine is con-trolled by the software program of a machining center.

Slides

Working travels in X / Y / Z axis [mm] 1,000 / 1,100 / 1,170

Speeds in X / Y / Z axis [m/min] 60 / 50 / 75

Acceleration (max.) in X / Y / Z axis [m/s2] 7.5

Feed force (max.) in X / Y / Z axis [kN] 12

Accuracy (ISO230-2 Third edition 2006-03-15)

> Positioning accuracy in X / Y / Z axis [mm] 0.006

> Repeat precision of positioning in X / Y / Z axis [mm] < 0.003

Main spindle

Drive

Toolholder for short hollow taper tools to DIN 69 893 HSK-T100

Spindle bearing spindle diameter on front bearing [mm] 100

Speed nmax [rpm] 10,000

Drive power max. at 100 % / 40 % duty cycle [kW] 50 / 66

Spindle torque max. at 100 % / 40 % duty cycle [Nm] 258 / 340

Chip-to-chip time t2 to VDI 2852 [s] referred to speed [rpm] (Siemens 840D sl) (Pick-up / double disc)

4.0 bis n = 5,000

Spindle clamping [Nm] 1,200

Tool magazine Double disc magazine

Disc magazine HSK-A100

Number of pockets; Standard 2 x 30

Tool length max. [mm] (front/back) 650* (590) / 500

Tool diameter max. [mm]

130> no diameter restriction for neighboring positions

> diameter restriction for neighboring positions 250

Tool weight max. [kg] 22

Tool moment in gripper max. [Nm] 40

B-Axis

Speed nmax [rpm] (automatic unbalance monitoring) 500

Torque max. at 100 % / 40 % duty cycle [Nm] 3,110 / 3,740

Component

Table diameter [mm] 950

Table load [kg] (range with/without) 1,000 / 1,500

Pallet size [mm] 800 x 800

Maximum interference diameter [mm] 1,280

Connection ratings

Power requirement at 400 V 3-phase / 50 Hz [kVA] at least 42

Compressed air [bar] 5

Weight (approx.)

Total weight [kg] (without/with pallet changer) 33,000 / 36,000

Expansion options

Automatic pallet changer [mm] 800 x 800

Tool magazine expansion TM145 (HSK-A100)

Pallet storage systemShelf storage with shuttle for interim storage of the workpiece pallets (up to 90 storage spaces).

Pallet changer An automatic two-pallet changer is the entry

into automation. • Between the working area and set-up

station two pallets 800 x 800 mm are changed. • The drive for the swing / stroke axis is per-

formed by a three-phase servo motor. • The pallets are on the setup station and

the round table with a zero-point-clamping system with cones.

• The setup area is rotatable by hand and can be indexed at 0 °, 90 °, 180 ° and 270 °.

ALL DATA AT A GLANCE

Mo

tori

zed

sp

ind

le 3

40 N

m,

10,0

00 m

in-1, (

Stan

dar

d)

S P INDLE CHART HSK-T100

–– motor power S1: 100 % duty cycle

–– motor power S6: 40 % duty cycle

–– torque S1: 100 % duty cycle

–– torque S6: 40 % duty cycle

www.grobgroup.com

GROB-WERKE Mindelheim, Germany

GROB SYSTEMS Bluffton, Ohio, USA

B. GROB DO BRASIL São Paulo, Brazil

GROB MEXICO Querétaro, Mexico

GROB MACHINE TOOLS Birmingham, Great BritainGROB RUSSLAND Moscow, Russia

GROB MACHINE TOOLS Hyderabad, India

GROB KOREA Seoul, South KoreaGROB MACHINE TOOLS Shanghai, China

GROB MACHINE TOOLS Beijing, China GROB MACHINE TOOLS Dalian, China

GROB KOREA Co. Ltd. Seoul, SOUTH KOREAPhone: +82 31 8041-3130E-mail: info@kr.grobgroup.com

GROB MACHINE TOOLS (BEIJING) Co. Ltd. Beijing, P.R. CHINAPhone: +86 10 6480-3711E-mail: beijing@cn.grobgroup.com

GROB MACHINE TOOLS (BEIJING) Co. Ltd. Shanghai, P.R. CHINAPhone: +86 21 3763-3018E-mail: shanghai@cn.grobgroup.com

GROB MACHINE TOOLS INDIA Pvt. Ltd.Hyderabad, INDIAPhone: +91 40 4202-3336E-mail: info@in.grobgroup.com

GROB RUSSLAND GMBHMoscow, RUSSIAPhone: +7 495 624-0586E-mail: info@ru.grobgroup.com

GROB MACHINE TOOLS U.K. Ltd.Birmingham, GREAT BRITAINPhone: +44 121 366-9848E-mail: info@uk.grobgroup.com

GROB MEXICO S.A. de C.V.Querétaro, MEXICOPhone: +52 442 713-6602E-mail: info@mx.grobgroup.com

GROB HUNGARIA KFT.Györ, HUNGARYE-mail: info@hu.grobgroup.com

GROB-WERKE GmbH & Co. KGMindelheim, GERMANYPhone: +49 8261 996-0Fax: +49 8261 996-268E-mail: info@de.grobgroup.com

B. GROB DO BRASIL S.A.São Paulo, BRAZILPhone: +55 11 4367-9100Fax: +55 11 4367-9101E-mail: info@br.grobgroup.com

GROB SYSTEMS, INC. Bluffton, Ohio, USAPhone: +1 419 358-9015Fax: +1 419 369-3330E-mail: info@us.grobgroup.com

GROB MACHINE TOOLS (DALIAN) Co. Ltd. Dalian, P.R. CHINAPhone: +86 411 3926-6488Fax: +86 411 3926-6589E-mail: dalian@cn.grobgroup.com

GROB HUNGARIA Györ, Hungary

© G

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· 04

/201

5/EN

TABLE CHART

motor power 100 %

motor power 40 %

motor power (max.)

torque 100 %

torque 40 %

torque (max.)

Ro

tary

Tab

le 4

,390

Nm

, 50

0 m

in-1 (

Stan

dar

d)

00 100 200 300 400 500

450

900

1350

1800

2250

2700

3150

3600

4050

4500

4950

0

5

10

15

20

25

30

35

40

50

45

Torq

ue

in N

m

Speed (rpm)

Pow

er in

kW

Speed (rpm)

0

70

60

50

40

30

20

10

Pow

er in

kW

Torq

ue

in N

m

360

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

340