ROBA® DS Type 9120

The Lightweight Coupling for torque transducers

The new aluminum version of our proven ROBA® DS for torque transducers (Type 9120) combines low weight with improved performance density. It is ideally suited for speed-critical applications and demanding test bench environments.

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Reliable coupling solutions for high-speed applications

High-speed test benches and dynamic drive systems place exceptional demands on shaft couplings. They must compensate for misalignments, minimize disruptive forces, and ensure precise, backlash-free torque transmission.
With the ROBA® DS Type 9120, we offer a weight-optimized aluminum variant of our proven steel design—engineered specifically for precision, dynamics, and operational safety in high-speed applications.

Your benefits with the ROBA® DS for torque transducers (Type 9120)

lightweight aluminum hubs and modules
up to 60% lower mass and inertia compared to the steel version
nickel-plated for enhanced corrosion protection
compact design with outer diameter reduced by up to 10 mm
engineered for speeds up to 32,000 rpm
seamless integration with HBM/HBK torque transducers
backlash-free torque transmission—even under demanding load cycles

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Technology engineered for maximum precision

Our new ROBA® DS aluminum coupling (Type 9120) is based on the proven backlash-free steel design and combines high performance density with minimal weight. It delivers reproducible measurement results even at high speeds—ideal for test benches with demanding requirements for dynamics, stability, and balance. Custom-engineered aluminum hubs and modules ensure long-term reliability and durability in continuous operation.

optimized geometry for stiffness and high-speed stability
balance quality G 2.5 at 5,000 rpm for smooth, low-vibration operation
high-precision manufacturing tolerance (IT6)
backlash-free torque transmission across changing load profiles
reproducible results due to precision disk pack design
minimal restoring forces—ideal for sensitive measuring setups

Download product sheet (PDF)

ROBA® DS Type 9120 – Technical Insights in the Product Video

Reliable under pressure – for demanding high-speed environments

The ROBA® DS coupling (Type 9120) delivers precision and stability across a wide range of high-speed use cases—from experimental research to full-scale production. Its low mass inertia and high torsional rigidity ensure consistent torque transmission, even under extreme conditions.

E-mobility test benches

Reliable, backlash-free measurement at over 20,000 rpm – ideal for dynamic performance testing in electric drive development.

Production test benches in industry

Consistent performance under changing loads and speeds up to 32,000 rpm. Ideal for robust, repeatable testing in production environments.

High-performance motorsport

Lightweight design for smooth operation – even with critical bending vibrations. Reduced moment of inertia for compact, high-speed electric drives.

Research and development

Precise torque transfer with minimal interference. Designed for reproducible results and high accuracy in university labs and R&D setups.

Everything you need to know – in one document

Get a concise overview of the ROBA® DS coupling for torque transducers (Type 9120), including technical specifications, design variants, and application options.
Our data sheet summarizes all relevant details clearly and accessibly.

Download product sheet (PDF)

Configure your ROBA® DS for torque transducers (Type 9120) in just a few clicks

Use our online configurator to tailor the coupling precisely to your technical requirements.

guided selection of material, torque, and size for your application
direct export of 2D/3D CAD data (IGES, STEP, DXF)
PDF and TIFF technical drawings included
get real-time pricing and lead time instantly

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Combine the ROBA® DS (Type 9120) with the EAS® HSE torque limiter

Securely integrated

Preferred configurations for torque transducer setups

Achieve high-speed precision and overload safety in one setup: By combining the ROBA® DS (Type 9120) with the EAS® HSE safety coupling, you gain a perfectly aligned system for torque-critical test environments. It ensures maximum operational safety, protects test specimens, shafts, and torque flanges, and enables uninterrupted data acquisition.

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ROBA® DS for torque transducers (Type 9120)

Backlash-free, torsionally rigid shaft coupling for HBM/HBK torque transducers

Torque range: 190 Nm – 13,000 Nm
Speed range: up to 32,000 rpm

Visit ROBA® DS product page

EAS® HSE

Torque Limiter for test benches and high-speed applications

Torque range: 45 Nm – 11,200 Nm
Speed range: up to 25,000 rpm

Visit EAS® HSE product page

Leading manufacturer of drive technology

We are one of the leading manufacturers of safety brakes, torque limiters, and backlash-free shaft couplings. Our broad portfolio includes mechanical safety clutches, electromagnetic spring-applied brakes, switchable couplings, slip clutches, and premium DC drives.

With decades of experience, we develop precisely tailored, cost-effective solutions—built around your requirements.
From global OEMs to specialized machine builders, customers around the world trust in the quality and reliability of mayr® power transmission.

Talk to our experts

Need advice on configuring the ROBA® DS (Type 9120) for your torque measurement setup? Whether you're planning a project or looking for a custom solution—our specialists are here to support you.

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