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Rotary unions · Electrical slip rings · High-precision air bearings Test rig equipment · Minimal-quantity lubrication

Setting ideas in motion

www.gat-mbh.de

Challenge us – we will provide the right solutionFor over 30 years GAT (Gesellschaft für Antriebstechnik mbH) has been anexpert for fluid and sealing technology. Our extraordinary reputation restson convincing concepts and sophisticated technology. With more than

120 employees GAT develops, manufacturesand sells a wide range of rotary unions, elec-trical slip rings, high-precision air bearings,torque motors and minimal-quantity lubri-cation systems. Thanks to our 18 sales officesaround the world we are always close to ourcustomers, providing competent consultingservices and direct support. GAT focuses on custom solutions to meetthe highest expectations. That is why our

sales efforts are mainly dedicated to a thorough application analysis carriedout by our engineers and product specialists. With their expert knowledgeof a broad range of industries they are able to solve complex tasks. Evenwhen faced with completely new challenges our seasoned consultantssimply know what is technically feasible. The continuous development of products and production processes as wellas the ongoing extension of employee know-how express the passion weshare for perfection and reliability. A powerful com-pany resources planning system and transparentprocess control ensure reliable production processesand short delivery times. After production andbefore leaving the company, all finished products arethoroughly tested to guarantee superior quality,because in the end customer satisfaction is the onlything that counts.

Customer requirements

Seriesproduct

Individualconfiguration

Individual production

Solutions Consulting services

Engineering

GAT solutions

Design

Headquarters and production site at Geisenheim, Germany

Air-conditioned production Exhibiting at internationaltrade shows

Devising solutions together with thecustomer

3D-CAD and FEA software Assembly by trusted hands

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Proven references:Technology for many industriesOur technically elaborated products are used wherever uncompromised reli-ability under the most adverse operating conditions is crucial. When itcomes to ensuring system availability our products play a key role:

• In wind turbines, our hydraulicrotary unions and slip rings allowcorrect adjustment of blade pitch towind direction, even under roughconditions.

• Thanks to the reliable supply ofcoolant to milling spindles, produc-tion runs smoothly even at high uti-lization rates.

• The production rates of rolling millscan be increased as the rotary unionensures a reliable supply of hydraulicfluid to the spindle - even at highspeeds.

• Highway tunnels are driven throughmountains in record-breaking time

thanks to special rotary unions providing effective protection againstabrasive rock dust.

• GAT slip rings allow ships to perform seismic ocean-floor scanning at unprecedented speeds.

• GAT is the product manufacturer of choice for thepetroleum industry to further reduce downtimes.

Products from GAT are used in critical situations andin various production plants and machines.

Wind turbines Tooling machines Rolling millsTunnel-boring machines Petroleum industry

Semiconductor productionHuman centrifuges Packaging machines

Injection-molding machines Water turbinesSolar cell manufacturing Special machines

Separating centrifuges Crane manufacturingTransmission manufacturing

Seismic Seabed Mapping Bottling machinesAutomotive painting lines

Vacuum coating technologyVessel winches Robots Torsion test rigs

Vacuum technology Theater stagesPharmaceutical industry

ging machinesHuman centriing macha

ue

p

GAT industry expertise

Packaging machinesMachine toolsRolling millsCentrifuges Seismic measuring systemsTunnel-boring machines Oil-drilling systems Production system for semiconductors

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GAT rotary unions: Reliability for productionHigh-performance rotary unions are employed in many industries totransfer the most diverse media between fixed and rotating machine ele-ments. Depending on the application, the requirements for rotary unions

vary. To offer the best solution for any kindof application GAT has developed eight dif-ferent sealing systems, including: Leakage-free elastomer seals with optimizedsealing ring profiles featuring wear-resistantshaft coatings, ceramic mechanical seals withhydrostatic wear-reduction and contactlessgap seals of various geometries for high-per-formance rotary unions. To obtain a com-pact comprehensive solution for specificapplications the systems can be combinedwith each other. The long-term use of our rotary unionsunder the most adverseconditions and the ongoing

exchange with our customers has significantly contributedto the continuous development and enhancement of ourproducts.

Operating reliability

Design concept

Field use

Performance test

GAT Engineering

Our principle: First-class functionality GAT products embody more than 30 years ofexperience gained from the development ofsolutions for the fluid and sealing technologyresulting in more than 150 patents. A highdegree of flexibility allows us to provide awide product range of custom solutions insmall quantities as well as standard solutions inhigh quantities. All products offer utmost pre-cision and reliability: From 500 gram emulsionrotary unions to 4 ton hydraulic rotary unions,from 150-channel slip rings to ultra-high pre-cision air bearings. Using the best ideas andlatest technologies we continue to enhanceour products. Each product is carefully opti-mized to the respective operating require-ments. Although custom solutions are at thecenter of our efforts we also offer a widerange of standard products.

Voltage

Geometry

Volume flowPressures

Media

Operating speed

Current

Rotodisk SSingle-channel axial rotary union with hydrostatically released mechanical seal

Rotodisk S AKRotary union with mechanicalseal for emulsions, air or oil mist

RotopackRotary union with elastic contact seals,leakage-free

Rotodisk SWMechanical seal cartridge for radialsupply

RotocalRadial rotary union for large shaftswith diameters of up to 3 m

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RotovacVacuum rotary union with ferro-fluid seal

Rotostat ERotary union with radial gap

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Rotostat NSealing system with axial gap

For power and data currents: GAT electric slip ringsProven gold/gold technology is used for thetransfer of high power currents, fine analogmeasurement signals or high-speed digitaldata. Using this combination, highest contactquality and unsurpassed product life can beachieved. Besides, there is no more need toremove abrasion dust. A low electric noiselevel ensures the reliable transfer of signals ofall current BUS systems, including Fast-Ethernet.Due to their modular design our slip rings canbe configured for individual solutions andcountless applications. The result is a very com-pact design that can be complemented with anintegrated rotary union. Thanks to variousindustry-standard connectors the system canbe installed easily. Fiber-optical rotary jointsare available for extremely high data rates. By using a modular design the slip rings canalso be configured for individual solutions anda number of applications. The compact dimen-sions allow for the integration of a rotaryunion.

All air, no friction:Aero-static air bearings from GATWherever ultimate speeds or micro-meter positioning accu-racy are required, our spindle and linear guide units with airbearings are the system of choice. Based on our provenmicro-jet technology our air bearings offer unique durabilityand a long service life and are adapted to meet individualapplication requirements.

Rotokombi slip rings for versatile use:Transferring as well gas, oil and waterAll of our sealing systems and slip rings can be bundled intocomplete systems, allowing the transfer of different media atdifferent pressures and also currents by one single unit. Eachrotary union is carefully adjusted to its operating requirements.

Economic efficiency put to test: GAT test rig technologyWherever drive elements must be tested to the mostdemanding conditions, our hydraulic torque motors or hydroswingers come in. Their compact design and the hydrostaticrotor bearing make them first choice for highly dynamic tests.Mechanical power circulation adds to the system's efficiency.

Simply a clean solution: GAT minimal-quantity lubricationThe conventional use of traditional coolant lubricants for cut-ting processes is expensive and can cause health and environ-mental hazards. Therefore, our minimal-quantity lubrication isa smart alternative for many applications as it increases pro-ductivity and reduces costs.

Where advanced tech-nology meets efficiency

RotosprayRotary atomizer with air bearings for automotive painting lines

RotoguideFrictionless high-precision bearing for shafts and guides

Test rig technologyTorque motors and complete test rigs for the testingof drive elements and components

IMQL: Internal minimal-quantitylubricationSystems for residual-free consump-tion lubrication for the significantreduction of manufacturing costs

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Electrical slip ring ESWHollow-shaft slip ring

Electrical slip ring ESRSystem with quick-release standard in-dustry connectors

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Media Vakuum

Pressure (mbar) 10-8 10-6 10-4 10-2 1

Operating speed (min-1) 100 · · 1,000 · · 10,000 · · 100,000

Channel Ø (mm) 6 10 16 25 40

Attachment Radial Axial

Media Oil Emulsions Water Air Gas

Diameter (mm) 100 300 1,000 3,000

Pressure (bar) 10 20 50 100 200 500 1,000

Peripheral speed m/s 1 20

Attachment Radial Axial


Pressure (bar) 10 20 50 100 200 500 1,000


Channel Ø (mm) 6 10 16 25 40

Attachment Radial Axial Cartridge

Channels 1 up to 10


Pressure (bar) 10 20 50 100 200 500 1,000


For shafts Ø (mm) 30 50 65 80 100 125 150

Channel Ø (mm) 6 10 16 25 40


Channels 1 up to 2


Pressure (bar) 10 20 50 100 200 500 1,000


For shafts Ø (mm) 30 80 140 200

Channel Ø (mm) 6 10 16 25 40


Channels 1 up to 4

Media Oil Emulsions Water Air Grease

Pressure (bar) 10 20 50 100 200 500 1,000


Channel Ø (mm) 6 10 16 25 40


Media Oil Emulsions Water Air Grease

Pressure (bar) 10 20 50 100 250 500 1,000


For shafts Ø (mm) 25 30 35 40 50 65 80 100 125 150

Channel Ø (mm) 6 10 16 25 40



Pressure (bar) 10 20 50 100 200 500 1,000


Channel Ø (mm) 6 10 16 25 40


Channel 1 up to 25

Rotostat E: Radial gap sealThis seal features a contactless sealing system with a hy-drostatically controlled radial gap and is suitable forhigh rotation rates of up to 40,000 min-1 and very highpressures of up to 600 bars. Pressure and rotation rateare independent of each other. The sealing system trans-

fers oil, water or gas and can be used for a number of purposes suchas rotary clamping systems, blade pitch control, pusher centrifuges orhigh-speed down coilers in mills.

Rotostat N: Gap seal as cartridge elementThis seal comprises a cartridge element with a hydrosta-tically controlled axial gap seal for the radial supply ofmedia. It is used for high flow rates of up to 700 l/minand high pressures amounting to 250 bars. The system is

also available as a complete rotary unit for particularly rough appli-cations like pusher centrifuges or down coilers in mills.

Rotostat A: Axial gap sealWith a hydrostatically controlled axial gap seal this sealis ideal for midrange pressures. It is used for oil andwater-based liquids and is suitable for high speeds ofup to 30.000 min-1 and pressures of up to 80 bars. Due

to its compact design, the Rotostat A is often used for the radial sup-ply of cooling lubricants or hydraulic fluid for clamping applicationsin machine tools.

Rotopack: Contact sealThis sealing system comprises a series of leakage-freeaxial and radial, single or multi-channel rotary unionswith elastic contact seals for high pressures of up to 450 bars and low rotation rates. Thanks to many differ-

ent sealing elements and materials these rotary unions are of univer-sal use and suitable for almost any medium.

Rotocal: Sliding-shoe sealRadial rotary unions for shafts with very large diametersof up to 3 meters. Media is transferred only via a sectionof the rotor perimeter. Particularly when used in appli-cations with large shafts the patented technology en-

sures minimal leakage losses and is suitable for all media. Typicalapplications include fermentation plants, mining machinery, propellerpitch control and more.

Rotovac: Ferro-fluid sealVacuum rotary unions with ferro-fluid seal transmit ro-tary motion and media into vacuum applications ortransfer vacuum from fixed into rotating components.The unions are ideal for processes demanding a high

degree of cleanliness and ultra-high vacuum applications.

Rotodisk SW: Mechanical seal as cartridge elementThis system features a cartridge element with a compactdouble slip-ring seal and is employed for the radial sup-ply of emulsions. It handles pressures of up to 70 bars at

rotation rates of up to 6000 min-1 and is mainly utilized in millingheads and driven tools with internal coolant supply.

Rotodisk S: Mechanical sealThis seal comprises a single-channel rotary union withhydrostatically released contact seals made of extremelydurable, ultra-hard ceramic. The system is suitable forhighest rotation rates of up to 100.000 min-1 and pres-

sures amounting to 230 bars. Pressure and rotation rate are indepen-dent of each other. Emulsions, oil or air are supplied to milling ordeep-hole boring machines.

Transfer Power currents

Analog signals

Digital data

Fiber-optical signals

Air (optional)

Voltage (V) 0.001 0.01 0.1 1 10 100 1,000 10,000

Currents (A) 0.001 0.01 0.1 1 10 100 1,000

Number of poles (max.) 12 20 30 50 80 160 300

Operating speed (min-1) 1 10 100 1.000

Compressed air (opt.) G ¼ G ½ G1 G 1¼

Rotoflux: Electrical slip ringsGold spring wire running on gold-plated contact rings isour preferred transfer method. Even with 200 channelsthe system is rather short. If required, air channels orvarious rotary unions can be added. Among the typical

applications are rotary tables, wind turbines, packaging machines,tooling machines, theater platforms.

Media Air

Operating speed (min-1) 1,000 · · 10,000 · · 100,000

Flow rate ml/min 100 · · 1,000 · · 10,000

Rotospray: Rotary atomizerRotary atomizer using air bearings with a flow rate of1,200 ml/min at 70,000 min-1. The micro jet air bearingwith a high load capacity is perfect for robotized appli-cations. Special bearing materials for high durability.

Pneumatic high-performance turbine with low air consumption.

RotokombiBy integrating different rotary unions into a single sys-tem, different media can be transferred at the sametime at different pressures. Electrical slip rings can beadded to transfer electric current. This combination sys-

tem is designed for very high rotation rates.

Application Turning Milling High-speed cutting

Drilling Deep-hole drilling Reaming

Tapping Thread molding

Supply Internal / external lubrication

Lubricant (ml/h) 5 · 10 · 20 · 50 · 100

Manufacturing costs 100%

Rotojet AIMQL: Internal minimal-quantity lubrication for the re-liable lubrication of cutting points. Oil aerosols are crea-ted outside of the spindle and are supplied via asingle-channel system – even over long distances. Very

simple dosing adjustment by automatic tool detection. Easy to ope-rate and service.

Concepts Torque test rig

Torque test bench

Application areas Product life Rigidity

Efficiency Vibrations

Test samples Transmissions Shafts Clutches

Shaft-hub joints Drive elements

Torques (Nm) 100 1,000 10,000 100,000 1,000,000

Operating speed (min-1) 100 1,000 10,000

Control parameters Independent

Loads Static Rising

Dynamic High-frequency

Operating costs 10% 100%

Test rig technologyDesigned for the testing of drive elements and compo-nents with alternating loads. For the simulation of com-plex loads relative movement can be superimposed withtorques of 120,000 Nm and rotation rates of 20,000 rpm.

Pressure and rotation rate are independent of each other. Power cir-culation helps to save energy.

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It's all about qualityRepairs are as annoying as downtimes are costly. We at GAT take everyeffort to develop and manufacture products that yield a long service life andutmost reliability. GAT products are subject to long operating periods,

extreme loads and demanding operating conditions. Thatis why all parts must be manufactured as accurately as pos-sible.During the initial product design only cutting-edgeprocesses and high-quality materials are used. GAT productsare developed with the help of powerful 2D and 3D CADsystems, and FEA serves for the simulation and optimizationof critical parts. Machining to minimal tolerances andassembly take place in air-conditioned rooms and in com-pliance with strict cleanliness requirements. Any testsduring the manufacturing process are carried out withmodern electronic testing devices. Each product is subjectto a final quality check under customer-specific testingrequirements, making sure that all functions work properly.Finally, a quality management system in compliance withDIN ISO EN 9001 ensures a consistently high quality of allprocesses.With our proprietary

quality concept our customers canrest assured that components fromGAT are the most durable and reli-able parts of their equipment andoffer high technology with a longservice life.

Precision manufacturing on aCNC turning machine

Checks using geometry testerwith air bearings

Quality control using electronic measurement devices Fully automatic dynamic wet testPrecision machining on a CNC machine Run-in on a computer-controlledtest rig

Final testing, service, reliable supply, warranty

Proven under real-life conditions

ISO, TQM

Design, production, measurement, test

GAT quality concept

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GAT – Gesellschaft fürAntriebstechnik mbHIndustriestraße 1165366 Geisenheim (Germany)

Phone: +49 (0)6722 93788-0Fax: +49 (0)6722 93788-110E-Mail: [email protected]: www.gat-mbh.de

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