ROBA® topstop®

Smart safety brake for vertical axes

Plug-and-play safety brake for standard servo motors – supports the efficient implementation of system redundancy on vertical axes.

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Safety meets integration

The ROBA® topstop® is a ready-to-install safety brake module for reliably securing vertical axes. The safety brake holds the load securely in position even when the motor is switched off or removed.

Thanks to the adapted flange dimensions, the ROBA® topstop® can be integrated directly between the servo motor and gearbox or retrofitted into existing systems.

Technology that inspires confidence

✓ Mechanical safety

Optimized solution for functional safety according to DIN EN ISO 13849-1 and for static brake test
Can be regarded as a tried and tested component in terms of the Category 1 of
DIN EN ISO 13849-1
Closed module with optimized seal - IP66 protection as standard
Holds load when motor is dismounted

✓ Modularity & variants

Easy integration through adapted flange dimensions
Connection via M12 plug as standard
Variants with bearing-supported shaft, bearing-supported output shaft with plug-in compensating coupling, or double-sided hollow shaft
Compact design

✓ Digital integration

Sensorless brake monitoring with the ROBA® brake-checker®
Data output available via the IoT-enabled ROBA® gateway

Certified safety according to TÜV SÜD

The ROBA® topstop® is optimized for functional safety in accordance with DIN EN ISO 13849-1. According to TÜV SÜD, it can be regarded as a “tried and tested component” in terms of Category 1 of DIN EN ISO 13849-1. To support you in safety validation, we provide a validation tool that includes all required safety parameters (B10d), structured according to the standard.

Optimized solution for functional safety according to DIN EN ISO 13849-1
Validation tool with safety parameters (B10d) available

ROBA® topstop® – Your benefits at a glance

Plug-and-play solution for standard servo motors
Simple solution for system redundancy
Proven safety component according to DIN EN ISO 13849-1
Closed module with optimized sealing – IP66 protection as standard
Easy integration between servo motor and gearbox
Can be retrofitted into existing systems

Request your customized solution

Typical applications

Vertical axes

In production and handling systems

Robotics and automation

Stage technology

Gantry robots

Safety applications in gantry robotics and gantry systems

Technical highlights at a glance

You will find the complete technical specifications in the data sheet (PDF).

Available sizes
Information on braking torques, speeds, and performance data
Complete connection and installation dimensions

Open technical data sheet

Variant diversity for maximum flexibility

Type 8990.000--

With bearing-supported shaft
Designed for use between the servo motor and gearbox.

Drive end:

Clamping hub

Output side:

Same interface as servo motor

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Type 8990.0----

With bearing-supported output shaft and plug-in compensating coupling
Designed for use between the servo motor and gearbox.

Drive end:

Plug-in elastomer coupling
Shrink disk hub or clamping hub

Output side:

Same interface as servo motor

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Type 8990.1----

with hollow shaft on both sides and plug-in compensating coupling
Designed for use between the servo motor and shaft, e.g., spindle shaft.

Drive end:

Plug-in elastomer coupling
Shrink disk hub or clamping hub

Output side:

Shrink disk hub

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ROBA® topstop® – Technical insights in the product video

Optional features and special designs

Optional to the standard

Optional terminal box

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Optional to the standard

Optional hand release
Enables manual release of the brake in situations without power supply.

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Special design

Integrated shaft coupling and mounting flange with bearing seat for ball screw spindle

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Special design

Mounting flange and reinforced bearing for absorption of axial forces

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Is your ROBA® topstop® a “tried and tested component” according to the standard?

Verify this easily and in a structured way using our validation tool – based on the requirements of DIN EN ISO 13849-1.

Overview of basic and tried-and-tested safety principles
Classification as a tried and tested component according to Category 1 of DIN EN ISO 13849-1
Complete safety parameters including B10d
Structured fault lists according to normative specifications

Download validation tool

System integration made easy

The ROBA® topstop® can be connected directly to the ROBA® brake-checker® – a sensorless module for reliable brake monitoring. In combination with the ROBA® gateway, all relevant brake data is read out and visualized via Ethernet. This makes it ideal for Industry 4.0 environments, transparent dashboard visualization, and integration into remote maintenance systems.

Learn more about the ROBA® gateway

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.

Personal consultation

Our experts support you in selection and integration—from sizing to commissioning. Contact us for individualized advice.

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Downloads and further resources

ROBA® topstop® data sheet

All technical details of the ROBA® topstop® – summarized in a compact PDF.

Download PDF