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News 2016 newbrakeoptions
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Press release

New brake options for cranes and hoists

Revised brakes offer a big increase in rated torques

September  2016

The revised BFK470 range of spring applied disc brakes from INTORQ make possible increases in rated torques of up to 80%.  This has been achieved by new options in the friction material, optimised magnetic circuits and closer manufacturing tolerances.  In addition these brakes have IP66 enclosure as standard which suits their target markets of cranes, hoists, winches and wind turbines.  The BFK470 range is available for holding torques up to 370Nm.  Brake release is by energising a DC coil with voltage options of 24, 103, 180 and 205 volts.

A main feature of the BFK470 range, and the key to the high performance, is the range of options for the friction material.  A distinction is drawn here between ‘normal’ operating duties with frequent dynamic stops, and ‘holding’ duties where brake engagement is usually at zero speed but with occasional dynamic emergency stops.  For normal operation the options of friction material are standard, wear resistant, high temperature resistant or free of running-in.  Each has a different friction characteristic and customers can specify a pre-set value in a range approximately -30 to +70% of the normal rated torque.  For holding duties a further high coefficient of friction option is available giving torques over two times the normal rating.  For example this produces 200Nm from a brake of diameter 200mm.

The high enclosure rating of IP66 suits operation in unprotected outdoor environments including docksides.  The brake casings are nitrided steel with internal O rings to seal the joints.  Unusually, a manual hand release can be specified without derating the enclosure as special seals are fitted here and to the casing fixing bolts.  The high enclosure does not make routine wear checks difficult as there is plug access to measure in the air gap inside the brake.  A further option is described as CCV : Cold Climate Variant.  This suits ambient temperatures from -40 to +50°C.

The INTORQ BFK470 can be supplied for dynamic torques 2 to 250Nm and holding torques up to 370Nm.  All brakes in the INTORQ range are sold and supported by the UK by Techdrives of Bedford.


INTORQ BFK470 brake with manual release and enclosure to IP66

About Techdrives

Techdrives is a division of Lenze Ltd offering products that are essential for machine building. These quality products come from manufacturers where Lenze has a long relationship and they are supported by Engineers with strong product and application experience.

About Lenze Ltd

Established 47 years ago in Bedford, Lenze Ltd now has 50 employees and achieves sales of about £20M in power transmission equipment from the Lenze factories and other quality suppliers.  Services to UK customers include application engineering, software writing, training, commissioning and service

For more information, contact, Lenze Ltd, Fraser Road, Priory Business Park, Bedford MK44 3WH.  


01234 753201

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