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Linear Chain

Linear Chain Push-Pull Actuation Devices

Linear Chains are an important linear motion component in linear drive technology as they facilitate the movement of a load in a linear fashion, both vertically and horizontally.

As sole distributor of Grob Linear Chain within the UK and Ireland, R.A. Rodriguez (UK) Limited offers a solution that works like a conventional linear actuator but is made of specially formed links, whose geometry prevents the chain from buckling under heavy loads.

The range includes:

  • Linear Chain SK
  • Tower Chain TC

Grob linear chains are also very space-efficient, requiring very little storage space/ capacity. This is due to both the design of the drive housing and to the special profile of the chain links with its interlocking fingers which enable the chain to be rolled up efficiently into a small storage area, unlike traditional linear drives where significant installation space is needed for the spindle stroke.

Linear Chain SK

Available in three basic sizes with stroke lengths in excess of 5 meters, the Linear Chain has a maximum push force of up to 35,000 N.

Compact drive units for the chain and storage magazines are also readily available for all chain sizes.

Find a range of CAD models here, to find which LinearChain will suit your desired application.

Tower Chain TC Push-Pull Actuation Device

The Grob TowerChain creates high contact area between the chain links enabling a load capacity of 60kN and 4000mm unguided stroke. This chain design makes it possible to achieve high force density in a small space.

Grob Linear Chain Push-Pull Actuation Devices

Linear Chain SK

Grob’s Linear Chain SK offers robust linear motion, with minimal installation space due to the retractable chain design. Designed for a high duty cycle, the Linear Chain SK does not overheat and is ideal for applications requiring frequent or continuous movements. The push-pull chain also operates reliability in both high and low temperatures.

Resistance to Heat

Operating temperatures of up to 250°C (482°F) can be accommodated as standard. With a special configuration, the system can withstand continuous temperatures of up to 560°C (1,040°F).

Easy Maintenance
Individual chain links and worn components can be replaced quickly and easily, eliminating the need to modify or replace the entire system.

Unlimited Stroke Length

The system can be expanded as required using appropriate guide rails, enabling unlimited stroke lengths regardless of raw material availability.

GROB Linear Chain SK

Benefits of the Linear Chain SK

  • Very little space is required to operate, as the chain links can be stored in the tightest of spaces
  • Can be installed horizontally, vertically or on an incline
  • High reliability
  • Long service life
  • Maximum lifting load of 35000 N per linear chain
  • Chain length can be extended to any length
  • Implementation of practically ‘endless’ strokes
  • Full Stainless option available
  • Suitable for special environments such as cleanrooms or high-temperature zones
  • Standard stroke speed up to 600 mm/s; in special cases speeds of up to 1,000 mm/sec are even possible

Tower Chain TC

The Tower Chain TC builds on the proven Linear Chain SK concept. Its redesigned chain geometry enables higher stroke lengths and greater force transmission without the need for additional guidance. Particularly well suited for vertical applications, the Tower Chain TC can achieve lift movements of up to 4 metres without guide rails. The Tower Chain TC’s design allows for flexible extension of the chain length, while the chain itself forms a stable tower.

Benefits of the Tower Chain TC:

  • 4,000 mm stroke with 100 kN load *
  • Custom configuration
  • Extremely robust and low maintenance

* Under static load (60 kN under dynamic load)

GROB Tower Chain TC

Frequently Asked Questions About Linear Chains

What is a Linear Chain?

A LinearChain is a specially made mechanical chain which when interlocked uses push and pull strategies to move heavy loads. The combination of the push and pull forces creating the rigid locking design is what differentiates a LinearChain from other linear drive technologies.

How does a Linear Chain work?

The drive housing of a LinearChain contains a gear wheel. When this drive house is engaged with the chain it encourages the linear chain to move both forwards and backwards to create a force of push and pull. The chain actuator is made up of two loose ends, one is attached to the load and the other is guided freely, typically rolled up in a storage device to save space.

How does the Linear Chain push?

The chain can be operated by an electric motor or a hand winch to create a pushing force. This allows the shoulder of each chain to lock together and also push against each other to create a rigid unit. In turn, this creates a lifting solution or pushing force on the heavy object attached.

How does the Linear Chain pull?

The LinearChain is similar to a normal chain in the sense that it can still be wound up in one direction and stored in a magazine, to save space. Pairing this mechanism with a drive element will result in a chain pull on the load, causing the attached load to be pulled.

What’s the difference between the Linear Chain SK and the Tower Chain TC?

The Linear Chain consists of interlocking links that rest on the shoulders and pins of the following link. In contrast, the Tower Chain uses a U-shaped link design, providing enhanced stability and enabling unguided stroke lengths of more than 4 metres.

What can Linear Chains be used for?

  • The stage platform in a theatre or concert hall
  • Refrigeration units
  • Bespoke car parking solutions systems
  • Material feeding in production plants
  • Materials handling
  • Window actuators
  • Scissor lifts
  • Telescopic lifts
  • And much more….
Linear Chain applications
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