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The new high-performance braking system has been developed for use in crane systems, port facilities, ship winches, hoists, and belt conveyors. A new manual release has been designed specifically for this brake meeting the high requirements of the enclosure rating. The modular structure of the brake enables flexible use with single or dual rotor.

Lenze INTORQ BFK471 IP66 Spring-Applied Brakes with Manual Release Distributors


Operating Instructions

If you are looking for INTORQ BFK471 Brakes, please call us at (844) 331-9371 or email us at we will do our best to help you find the INTORQ BFK471-25 that you are looking for at the most competitive prices possible. If you are searching for INTORQ BFK471-25 brakes technical information (data-sheets) please use the datasheets or product selection guide page links.

This brake is only to be actuated with a bridge half-wave rectifier (included in the scope of supply). The power input during the release is 440 W for 1.3 sec., then it is reduced to 110 W.

The spring-applied brake is designed for the conversion of mechanical work and kinetic energy into heat. Due to the static brake torque, the brake can hold loads without speed difference. Emergency braking is possible at high speed. The more friction work, the higher the wear.


  • New braking system with a high performance and a sealed manual release, enclosure according to IP66
  • Modular, 750 Nm with single rotor, 1500 Nm in dual rotor design
  • Can replace existing brake solutions
  • High degree of Corrosion-resistant by nitrided friction surfaces and zinc-coated magnet housing
  • Energy-saving control by bridge/half-wave rectifiers
  • Easy air gap check in the brake by check bore holes in the housing
  • Accessories, optional, also retrofittable
    • Non-contact sensor for air gap and/or wear monitoring
    • Manual release lockable

The spring-applied brake is a disc brake which, depending on the version, has two or four friction surfaces. The braking torque is generated by several compression springs by friction locking. The brake is released electromagnetically.

During braking, the rotor, which is axially movable on the hub, is pressed against the friction surface - via the armature plates - by means of the springs. The asbestos-free friction linings ensure a high braking torque with low wear. The braking torque is transmitted between hub and rotor via the splines.

In braked state, there is an air gap "sL" between the stator and the armature plate. To release the brake, the coil of the stator is excited with the DC voltage provided. The magnetic force generated attracts the armature plate towards the stator against the spring force. The rotor is then released and can rotate freely.

Whether we have INTORQ Spring-Operated Brakes in stock in Boise, Idaho or need to ship direct from Lenze to any USA cities; ACTECHDRIVES.COM can get INTORQ BFK471-25 brake to you fast and save you some money. Our industrial factory automation supplies distributors warehouse stocks some Lenze AC Tech products enabling us to further assist you in finding the correct INTORQ BFK 471 brakes in the USA, Canada, or Mexico. It will be very helpful if you have the INTORQ BFK 471-25 brake part numbers ready, then our sales representatives can provide you with a pricing and availability quote for INTORQ BFK 471-25 brakes that you are looking for in seconds. If you do not have the part numbers for INTORQ BFK 471 spring operated brake, our application engineers will be able to help you figure out the part numbers and get the price quote to you as soon as possible.

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