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Eriks has specified a range of power transmission products for the remanufacture of a tyre shredder used at a tyre recycling centre in the UK.

The centre is capable of recycling up to 5 million individual tyres (50,000 tonnes) each year and reducing them to a fine-quality crumb that can be used for a range of products, including sports surfaces and children’s playgrounds.

The operator had a requirement for a damaged tyre shredder to be fully overhauled.

A number of components needed to be repaired or replaced, including the motors, gearboxes, couplings, bearings and drive chains.

As a result of the high energy usage of the machine, the client also saw this as an opportunity to update the shredder and make it more energy efficient.

Eriks, a supplier of industrial products and engineering solutions for use in the MRO and OEM sectors of industry, was able to rebuild the damaged tyre shredder using efficient components.

The process started with a preliminary assessment and a quote for the work.

Following approval from the client, Eriks engineers working at the company’s large-capacity (Transline Division) engineering workshops in Dudley completed a detailed strip-down and inspection of the entire machine.

The company then assessed each component and provided a replacement or repair recommendation.

Mahesh Patel, technical manager at Eriks, said: ’Once we had seen the damage that had been caused, we could identify which parts could be repaired and which needed to be replaced.

’We then worked with the customer throughout the project, specifying and supplying the best components for the job to rebuild and update the shredder.

’Not having to outsource jobs to other companies allows us to drastically reduce lead times and manage costs,’ added Patel.

Large 75kW WEG high-efficiency motors were chosen to drive the main shears that reduce the tyres to a fine crumb and smaller WEG motors were also chosen to drive the primary handling rotors that feed the tyres into the shears.

One of the benefits of WEG’s W22 range is its energy-efficient performance, which is said to reduce losses by between 10 per cent and 40 per cent when compared with typical motors.

Fenaflex tyre couplings were used to connect the motors to the inline gearbox.

The couplings will tolerate misalignment in all planes, as well as offering simple installation.

They also have excellent shock-absorbing properties, isolating the motors from vibration and torsional oscillations.

The tyre couplings have zero backlash, making them ideal for reversing applications, especially when using geared drives.

Wear can be detected through visual inspection, which means that there is no requirement for machine strip-down for maintenance checks.

High-strength Falk gear couplings were used to drive the main gearbox from the two inline primary reduction gearboxes.

The two inline reduction gearboxes in the main drive system were stripped and assessed.

As a result of the significant wear present on the gear teeth, all gear internals were replaced with new case-carburised gears manufactured in house.

Seals and bearings were replaced or upgraded as necessary using various components with high-wear factors and lower friction coefficients for maximum efficiency.

Right-angle Fenner gearboxes were used to drive the handling rotors and the opposing ends were mounted on SKF housed bearings, reducing the maintenance requirements and maximising robustness in the design.

In addition to the motors, couplings and gearboxes, Eriks also supplied seals, gearbox bearings, drive chains and sprockets.

Each component was specified to the optimum power handling and wear capacity, ensuring a long running life without the expenses associated with over-specification.

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