Atlas Copco Turbo GrindersWhen the going gets tough

The Third Generation

You get power and

Wherever there are tough grindingjobs, you’ll find Atlas Copco GTG Turbo Grinders.

We now present the third generation, featuring the state-of-the-art GTG 21, the most powerful anddurable grinder on the market today.

Providing truly amazing performance on the roughest surfaces, this rugged tool has even morestamina than its predecessor.

The GTG 21 incorporates all your favourite featuresfrom the well-proven earlier generations, plusmany more.

Try one and see for yourself. It will raise your pro-ductivity to levels you never thought possible!

When the going gets tough – GTG Grinders get going.

durability

Tough and reliableThe most compact, powerful andefficient tool of its type on the mar-ket, the GTG 21 Turbo Angle Grinderoffers an extremely high rate ofmaterial removal.

Weighing only 1.8 kg, it handlesthe toughest jobs without strain onthe operator. Thus, it pays for itselffast by raising individual productivity.

Immense powerThe GTG 21’s third-generation tur-bine motor provides immensepower that maintains rpm under theheaviest loads. Try running this oneto a standstill! The turbine motormeans maximum utilization of com-pressed air, requiring only 15 l/s toprovide 1 kW compared to 20-25 l/sfor vane motors.

Safety and stabilityWith the GTG 21 you have perfectcontrol over the process and can

With its third-generation turbine motor and exciting new features, the GTG 21 Turbo Angle Grinder offers truly out-standing performance and an even longer service life. Thecompact design and impressive power of this tool make lightwork of the toughest grinding jobs.

always rely on the tool to keep wellwithin safe operating speeds.

A new support handle gives youan even better grip and the wheelguard has been modified for maxi-mum safety.

Flexible installationThe turbine motor can run withoutlubrication. A lubrication-free install-ation means no oil on the grindingsurface, resulting in higher weldquality and a better working envir-onment.

Less maintenanceDue to its redesigned front housing,the GTG 21 holds a greater volumeof oil, thus reducing the need formaintenance to a minimum.

Also, since the oil-filled gearboxon each Atlas Copco turbo grinder issealed, you are ensured very longservice intervals before mainten-ance is required.

Grinding has never

The low angle head on theGTG 21 allows unparalleledaccessibility and a good over-view of the grinding area.

The GTG 21’s high power-to-weightratio gives an impressively high rate ofmaterial removal. This cuts processtime to a minimum.

been easierQuick, simple wheel changeWith two wheel sizes to choosefrom, the GTG 21 Turbo Angle Grinder is equipped with an innova-tive spindle lock that makes wheelchanging quick and simple – onlyone key is required instead of two.

The wheel guard is quickly andeasily adjusted for maximum

accessibility and operator protection.The adjustable rear exhaust allowsthe air to be directed away from theoperator.

When the going gets tough…GTG Grinders get going.

■ Just one keyoperates thewheel nut lockand adjuststhe supporthandle.

■ For your safety, two flangesare provided – the small dia-meter flange for grinding andthe large for cutting.

■ Push lever forward tolock spindle, backward toadjust the wheel guard.

■ Exceptionally low height overangle head (68 mm) ensuresmaximum accessibility.

■ Integrated autobalancer re-duces vibrations to levels below 2.5 m/s2.

■ New, stronger wheel guard formaximum operator protection.Adjustment is fast and easy.

■ Third-generation turbine motorwith independent, simplifiedover-speed shut-off device.

■ New, stronger adjustable supporthandle fits either side of the tool.

■ Oil-lubricated angle head pro-vides total reliability. Redesignedfront housing holds a greatervolume of oil. Service is simple,maintenance intervals are long.

2-year warranty on angle gearing!

It’s true! Our confidence in thequality, reliability and long service life of the angle gearingon the GTG 21, enables us toprovide a 2-year warranty onthe angle gear.

The lightweight design of theGTG 21 makes overhead grind-ing tasks less tiring, ensuring a high quality end result.

The GTG 21’s lowangle head goeswhere other toolscan’t!

Fast, consistent performanceThe turbine motor means maximumutilization of compressed air. You getconsistently high performance andsmooth, fast cutting even whenconnected to long hoses. Processtimes are shorter than you everthought possible.

Trouble-free operationAtlas Copco turbine motors have no wear parts and require minimalmaintenance. Since they are lubri-cation-free, there is no risk of oilcoming into contact with the grind-ing surface. Also, you don‘t need toworry about air hose deteriorationdue to contact with oil. The result isimproved weld quality and trouble-free operation.

Why Atlas Copco Turbo Grinders?

Low vibration levelsAtlas Copco Turbo Grinders aredesigned with an integrated auto-balancing system, an innnovativevibration-dampening technique.During operation, a set of compen-sating balls corrects imbalances inthe wheel, reducing vibration tolevels below 2.5 m/s2.

Grinding wheel costs reduced by 30%Low vibration levels combined with optimal cutting speeds mean a 20-30% reduction in wheel con-sumption. How much do you spendon grinding wheels each year?

When the going gets tough…GTG Grinders get going.

GTR 40 Turbo Straight GrinderNeed a tool for rough grinding, fettling of castings,stock removal? The Atlas Copco GTR 40 offers tremendous power and total reliability for heavy grinding applications. This tool makes light work ofthe heaviest tasks. Fast and efficient, the GTR 40can be run on either lubricated or lubrication-free air.So you don’t need to worry about oil-clogged airlines. Service intervals are long. All you need do ischange the gearbox oil regularly. The GTR 40straight grinder saves you money and raises the productivity of your operation.

GTG 40 Turbo Angle GrinderAtlas Copco’s GTG 40 Turbo Grinder is proof that apowerful machine tool can also be easy to handle. TheGTG 40 is the perfect tool for really tough applicationsrequiring large amounts of material removal, such asin foundries and shipyards. Compact and light, it offersextreme cutting efficiency and a 30-50% increase inrate of material removal. By reducing the costs ofabrasives by more than 30%, the GTG 40 offers con-siderable savings and increased productivity.

Atlas Copco – generations ahead

The first tool manufacturer to deve-lop hand-held industrial grinderswith axial turbine motors, AtlasCopco is generations ahead of othertool manufacturers in this field.

Atlas Copco’s revolutionary single-stage turbine grinders went into serialproduction in 1993 and were a majorsuccess in the market. The secondgeneration, utilizing multi-stage tur-bine technology, was released in 1998.

Atlas Copco now presents thethird generation. Weighing only 1.8 kg, the GTG 21 incorporates theultimate in multi-stage turbine tech-

nology. The air passes six stages atconstant velocity giving extremelyhigh torque capability without com-promising efficiency or durability.

1990

1993 1998

20102000

2002

Second generationGTG 20

First generationGTG 40, GTR 40

Third generationGTG 21

Choose Atlas Copco grinding technology and the correct wheel diameter for optimum results

Application Tool Preferred technology Power Weight Wheel diam.

Heavy rough grinding, GTG 40 Single-stage turbine 4.5 kW 3.8 kg 180 – 230 mmsanding and cutting off GTR 40 4.5 kW 5.4 kg 125 – 200 mm

Rough grinding, sanding and cutting GTG 21 Multi-stage turbine 2.1 kW 1.8 kg 125 – 180 mm

All types of grinding jobs LSV Conventional vane type Up to 1.7 kW Up to 2.5 kg Up to 125 mm

For grinderAdjustable wheel guard:Attachment flanges for 1-10 mm thickgrinding wheelsHex key for wheel change

For both grinder and sander:Adjustable support handle

Whip hose 0.7 m long, 13 mm dia. complete with nipple and ErgoNip 10Gear box oil, one tube

For sander - D:Flow chanberSuction hood180 mm backing pad

Standard accessories

9833

140

6 01

Rec

ycla

ble

pap

er.

BO

AR

DW

AL

K 2

004:

1

Max. Max. Max. Weight Height Air consumption Hose Air Sound Ordering No.free wheel output over spindle at max. at free size inlet level at

speed dia. end power speed thread free speed

Model r/min mm kW hp kg lb mm in l/s cfm l/s cfm mm in BSP dB(A)a)

For grinding and cuttingGTG 40 F085-18 8,500 180 4.5 6.1 3.8 8.4 128 5.0 60 126 20 42 16 5/8 1/2 85 8423 2900 10*GTG 40 F066-23 6,600 230 4.5 6.1 4.0 8.8 128 5.0 60 126 20 42 16 5/8 1/2 85 8423 2910 10*For wire brush and sandingGTG 40 S072 7,200 125 4.5 6.1 3.6 7.9 132 5.2 60 126 20 42 16 5/8 1/2 85 8423 2920 00*GTG 40 S060 6,000 140b) 4.5 6.1 3.6 7.9 132 5.2 60 126 20 42 16 5/8 1/2 85 8423 2930 00*For cup wheelGTG 40 S060-C15 6,000 150 4.5 6.1 4.3 10.5 126 5.0 60 126 20 42 16 5/8 1/2 85 8423 2930 10*

a) According to ISO 15744 b) 230 for sanding, 140 for wire brush *) Available directly from stock

GTG 40

GTR 40

a) For type 1, straight wheels b) According to ISO 15744 * Available directly from stock

Accessories included• Adjustable wheel guard• Support handle• Attachment flanges for 1.5-7 mm

thick cut off wheels and 2.8-8 mmthick depressed centre wheels

• Whip hose 0.7 m long, 16 mm dia.complete with nipple and ErgoNip 10

• Gear box oil, one tube• Hex key and spanner for wheel

change

Accessories included• Wheel guard• Attachment flanges for grinding wheels• Whip hose 0.7 m long, 16 mm dia.

complete with nipple and ErgoNip 10• Gearbox oil, one tube• Key and spanner for wheel change

Optional accessories

Air hose set for maximum performance Ordering No.

Turbo 16, L=10 m, incl. ErgoNip 10 and ErgoQic 10 8202 1180 46Air preparation unit, incl. Midi F/R, ball valve, ErgoQic 10 8202 0845 48125 mm sander kit for grinder (adapter and backing pad) 4175 0883 92180 mm sander kit for grinder (adapter and backing pad) 4175 0883 90

Optional accessories GTG 40 and GTR 40

Air hose set for maximum performance Ordering No.

Flexible installations 5m, Ø 16mm, with hose whip 0.5m, air pressure >6 barTURBO 16/5 m/WQ10 L = 5m 8202 1181 80Flexible installation 20m, Ø 19mm,with hose whip 0.5m, air pressure >6 barTURBO 20/20 m/EQ10 L = 20m 8202 1181 75Air preparation unit, incl. MAXI F/R 25, ball valve, claw 8202 0845 55Fixed installation 5m Ø 16mm, air pressure <6 bar TURBO 16/5 m/CLAW L = 5m 8202 1181 95

Optional accessories GTR 40Thickness x hole dia. mm Ordering No.

Rear flange TxH 20-32x16 4150 0619 00TxH 20-32x20 4150 1650 00TxH 20-32x32 4150 0620 00

Spacer for cone wheel 4150 0787 00

Max. Recommended Spindle Max. Weight length Air consumption Air Sound Recom- Ordering No.free wheel thread and output incl. guard at max. at free inlet level at mended

speed mm length flanges power speed thread free speed air hose

Model rpm DxTxHa) UNC kW hp kg lb mm l/s cfm l/s cfm BSP dB(A)b) mm in

GTR 40 S060-20 6,000 200x25x25 5/8x55 4.5 6.1 6.4 14.1 563 60 126 20 42 1/2 85 16 5/8 8423 2954 00*GTR 40 S060-15 6,000 150x25x25 5/8x55 4.5 6.1 5.8 12.8 563 60 126 20 42 1/2 85 16 5/8 8423 2952 00*GTR 40 S072-13 7,200 125x25x25 5/8x55 4.5 6.1 5.6 12.3 563 60 126 20 42 1/2 85 16 5/8 8423 2951 00*GTR 40 S085-15 8,500 150x25x25 5/8x55 4.5 6.1 5.6 12.3 563 60 126 20 42 1/2 85 16 5/8 8423 2950 00*

Max. Max. Max. Weight Height Air consumption Hose Air Sound Ordering No.free wheel output over spindle at max. at free size inlet level at

speed dia. end power speed thread free speed

Model r/min mm kW hp kg lb mm in l/s cfm l/s cfm mm in BSP dB(A)b)

GTG 21 F120-13 12,000 125 2.1 2.8 1.8 3.9 68 2.7 30 64 10 21 13 1/2 3/8 74 8423 2963 00*GTG 21 F085-18 8,500 180 2.1 2.8 2.0 4.4 72 2.8 30 64 10 21 13 1/2 3/8 74 8423 2963 02*SanderGTG 21 S085 8500 180a) 2.1 2.8 1.8 3.9 80 3.1 30 64 10 21 13 1/2 3/8 74 8423 2963 05*GTG 21 S085 M14 8500 180a) 2.1 2.8 1.8 3.9 94 3.7 30 64 10 21 13 1/2 3/8 74 8423 2963 07*GTG 21 S085-D 8500 180a) 2.1 2.8 2.4 5.3 80 3.1 30 64 10 21 13 1/2 3/8 74 8423 2963 09*

-D equipped with accessories for dust extraction a) Max. diameter of fiberdisc b) According to ISO 15744 *) Available directly from stock

GTG 21

www.atlascopco.com

For grinding and cutting