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Lenze is offering the ETP Hyloc bush, based on hydromechanical principles, for the assembly and disassembly of hubs to shafts.

It reduces sticking and fretting and replaces keyways that have problems with fitting, backlash and fretting.

Hyloc also replaces taper connections that are difficult to release and prone to damage from dirt contamination.

Hyloc creates a backlash-free shaft connection that is easy to adjust and fast to fix and release.

Hyloc locking bushes are available from Techdrives in a standard range for shafts from 50 to 220mm.

Customised models can be supplied for larger shafts.

Connections can be made to gears, rolls, turbine impellors and other types of hub using surfaces that are machined parallel and to standard tolerances.

Hyloc works using hydraulic pressure from a hand or electric pump.

It consists of double-walled sleeve that encloses a tapered piston that moves axially under hydraulic pressure.

Connection ports allow the piston to be driven into the sleeve, which forces the walls outwards, creating a friction connection between the shaft and the hub.

When the pressure is removed the piston locks mechanically, forming a secure joint with high radial-load capacity.

The bush is released by applying pressure to ports that connect to the opposite end of the piston, forcing it back down the sleeve.

Hyloc is used in rolling mills, water turbines, feed rolls and dynamometers.

Torque ratings are high, for example 30kNm on a 100mm shaft, and the torque is proportional to the mounting pressure so it can be adjusted.

Normally bushes are set at 1000 bar, but anywhere in a range 800 to 1200 bar is possible.

During assembly it is easy to adjust and precisely position the hub radically and axially.

Once set, the Hyloc has good concentricity with run-out values of 0.01 to 0.02mm, allowing connection of output gears to gearbox shafts.

With 40 years' experience, Lenze Ltd are specialists in drive and automation equipment for the UK market. Today Lenze employ 60 people and operate with management systems approved to ISO 9001:2008.

Experience and expertise

The engineering comes first. With almost 50 per cent of our staff being qualified engineers, the right-sized technical solution to your problem is our goal. Our vision of right sizing means to work with you in order to achieve the optimum solution in terms of cost and performance.

The complete drive system  

Our products fit together to make the complete drive and automation system. Lenze products include automation, controllers, servos, inverters and geared motors. Our Techdrives division adds essential drive components such as couplings, actuators and locking bushes to complete your design.  

Worldwide, we are there to help you

Lenze companies are in 29 countries and have sales offices in a further 24. Full product information is available on our website and the international helpline makes it easy to contact us.

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