Indirect Safety Couplings
In indirect drives the central axes of drive end and against the driven side don’t lie on the same axis.

In indirect drives the central axes of drive end and against the driven side don’t lie on the same axis.
Ha-Co Indirect Safety Couplings
Reliable protection against overload for your drive system
Unexpected blockages or overloads can have serious consequences for industrial machinery. Damage to drive components, unplanned downtime and high maintenance costs are issues you want to avoid. Ha-Co indirect safety couplings provide a reliable and precise mechanical solution for protecting your drive system.
These high-quality safety couplings are manufactured by the German manufacturer HA-CO GmbH and are designed for applications where reliable protection of the drive system is essential.
The coupling monitors the transmitted torque and disengages the drive when the preset release torque is exceeded. This helps protect the machine and drive components against damage caused by overloads or unexpected blockages.
What is a Ha-Co indirect safety coupling?
An indirect safety coupling, also known as a slip coupling or torque limiter, is a mechanical safety component designed to protect machinery against excessive loads.
The coupling is used in combination with an external transmission element, such as:
Timing belt pulleys
Chain sprockets
Gears
V-belt pulleys
Other drive components
In the event of an overload, for example when a machine component becomes blocked, the preset maximum torque is exceeded. The safety coupling then responds quickly and mechanically disengages the drive. This prevents the motor, shafts, gears and other components from being subjected to unnecessary loads.
In short: the Ha-Co safety coupling acts as a mechanical protection system between the drive and the machine.
German quality from HA-CO
Ha-Co safety couplings are developed and manufactured by HA-CO GmbH in Germany. The manufacturer specializes in high-quality drive technology and precision mechanical components for industrial applications.
HA-CO combines precision manufacturing, reliable mechanical performance and solutions designed for demanding industrial environments.
OpenSupply supplies these high-quality Ha-Co components to companies looking for reliable protection for their drive systems.
Key benefits
Ha-Co indirect safety couplings combine a compact design with precise and reliable operation.
Key benefits include:
Reliable machine protection – protects the drive system against overloads and blockages.
Adjustable release torque – the coupling can be configured to the required maximum torque.
Fast response – when the preset torque is exceeded, the drive is quickly mechanically disengaged.
High repeatability – the coupling responds accurately at the preset release torque.
Backlash-free operation – provides direct and precise torque transmission.
Torsionally rigid design – suitable for applications where precise movement and positioning are important.
Long service life – high-quality materials and hardened functional components provide a durable solution.
Maintenance-free operation – designed for long-term use in industrial machinery.
Compact design – easy to integrate into a wide range of drive systems.
Automatic re-engagement – depending on the version, the coupling can automatically re-engage after the protection event.
Ha-Co FHW-B and FHW-D
The Ha-Co range includes several different versions. Two important series are the FHW-B and FHW-D.
Ha-Co FHW-B
The FHW-B is a compact indirect safety coupling featuring, among other things, a keyway and a sealed deep-groove ball bearing.
This version is suitable for applications requiring accurate and reliable overload protection. Depending on the version, shaft diameters of up to 66 mm are possible, with an adjustable release torque ranging from 0.7 to 1000 Nm.
Ha-Co FHW-D
The FHW-D offers similar high-quality characteristics but is equipped with a needle bearing. Thanks to its compact design and relatively small outside diameter, this version is particularly suitable for applications where installation space is limited.
Depending on the version, shaft diameters of up to 85 mm are possible, with an adjustable release torque ranging from 0.7 to 1000 Nm.
Applications
Ha-Co indirect safety couplings are used in a wide range of industrial machines and drive systems where reliability, precision and machine protection are essential.
Typical applications include:
Packaging machinery
Automation systems
Robotics and servo drives
Conveyor and transport systems
Printing machinery
Paper processing machinery
Machine building
Industrial production lines
Gear and chain drives
Timing belt drive systems
Thanks to their fast and precise operation, these safety couplings are suitable for both standard industrial drive systems and dynamic applications where a high level of precision is required.
Easy integration into your drive system
One of the key advantages of the indirect design is its flexibility when designing your drive system. An external transmission element, such as a timing belt pulley, chain sprocket or gear, can be mounted directly to the coupling.
This allows the Ha-Co safety coupling to be easily integrated into both existing and new machines.
The combination of a compact design, high precision and reliable overload protection makes these couplings suitable for a wide range of industrial applications.
Buy Ha-Co safety couplings from OpenSupply
With a Ha-Co indirect safety coupling, you choose a high-quality solution for protecting your machine and drive system against unwanted overloads.
OpenSupply offers a range of Ha-Co versions and can help you select the right solution for your application. Important factors include the required torque, speed, shaft diameter, available installation space and desired release torque.
Do you require a specific bore, keyway, torque setting or another customized configuration? OpenSupply can also assist with special technical requirements and application-specific solutions.
Protect your machine with Ha-Co
Prevent unnecessary damage, reduce unplanned downtime and protect your valuable machine components with a reliable safety coupling from HA-CO.
Ha-Co indirect safety couplings – high-quality German drive technology for reliable machine protection.
Order your Ha-Co safety coupling from OpenSupply or contact our technical specialists for advice on selecting the right version for your application.
Indirect safety couplings FHW-F
Indirect safety coupling FHW-F with clamping ring for shaft diameters up to 50 mm
€ 0,-
Indirect safety couplings FHW-H
Indirect safety coupling FHW-H with holding brake for shaft diameters up to 50 mm
€ 0,-





