Electro Magnetic Clutches and Brakes

Lenze electromagnetically released spring-applied brakes can be used wherever rapid deceleration or controlled holding of moving masses is required.

Since the braking force comes from pressure springs, the braking torque, which is generated by friction, is available when no current is applied – even in the event of a mains failure. The brake is released electromagnetically.

Application areas: Brake motors, cranes, warehousing, wood working machines, industrial trucks, stage machinery, vehicles for the disabled and escalators.

BFK457 Spring Applied Brakes

In many applications, all that is required of the brake is that it fulfils its basic function. For such situations the BFK457 is just the job. The fact that it can also be installed quickly using the integral fixing screws and fixed air gap makes this spring-operated brake even more attractive.


  • Braking torque: 0.12-125 Nm
  • 11 sizes
  • DC voltages: 24, 205 V
  • Thermal class F (155 C)
  • Compact construction with rotor and flange
  • Integral fixing screws for quick and easy installation
  • Fixed air gap
  • Noise-reduced double spring-operated brake <50 dB(A)

Application areas:

  • Small motors
  • Vehicles for the disabled
  • Wood working machines
  • Automation systems and general mechanical engineering.

BFK458 Spring Applied Brakes

Our modular system forms the basis of a product programme that can be adapted to suit practically any application. The BFK458 spring-operated brake is a standard product that can be used anywhere, but its modular design means it can also be used for special applications. Its versatility is its strength.


  • Braking torque: 2-600 Nm
  • 9 sizes in CSA-CUS design
  •  DC voltages: 24, 103, 180, 205 V
  •  Thermal class F (155 C)
  •  Preset air gap
  •  Braking torque can be reduced (module E)
  •  Long rotor/hub guide with low rate of wear
  •  Manual release facilities for all sizes
  •  Air gap and wear monitoring (optional)

Application areas:

  • Brake motors
  • Cranes
  • Warehousing
  • Wood working machines
  • Industrial trucks
  • Stage machinery
  • Vehicles for the disabled and escalators.

Lenze BFK461 Spring Applied Brakes

The Lenze Intorq range of spring-applied brakes is being expanded with the addition of the new BFK461 series of sealed designs. This brake has been specifically developed for application areas with high enclosure requirements. It is a self-contained system available in seven sizes and with braking torques of 4 - 235 Nm is ideal for use in wind power plants, cranes and textile machines.


  • Spring-applied brake, sealed design, IP65 enclosure
  • Designs with and without flange
  • Long maintenance intervals
  • Example applications

Brake motors:
Wind power plants, car wash systems, cranes, hoists, textile machines.

Clutch / Brake Units - Type 14.800

Clutch-brake combinations are frequently used in switched-mode systems with synchronous drive speeds. They are very rugged and easy to maintain.


  • Rated torques of 7.5-120 Nm
  • Brake and clutch mounted in a housing
  • Rapid acceleration and deceleration at constant motor speed
  • Easy to maintain as result of patented wear compensation system
  • Available with motor and gearbox from the Lenze programme

Application areas:

  • Packaging and labelling machines
  • Filling plants
  • Mechanical and apparatus engineering

BFK466 Multipole Disc Brakes

Direct drives for modern hoists demand brakes with high braking torques, short response times and low-noise operation. The multipole BFK466 satisfies all these requirements and can also be adapted to the contour of the motor.


  • Spring-operated brake in the form of a caliper
  • For multiple and redundant arrangements
  • High braking torque and large working air gap
  • Release without residual torque and quiet operation
  • Optimal contour adaptation to the design of the motor
  • High magnetic forces caused by overexcitation when releasing
  • 'Cold brake' through holding current derating
  • Air gap or wear monitoring using micro switch

BFK468 Spring Applied Brake

High-performance drives are generating ever higher motor speeds and drive torques. Although performance requirements are increasing, less and less space is available for the brake. The Intorq spring-operated brake for high-performance applications is the BFK468. The innovative multipole technology allows it to be released through a large air gap, even when forces are high.


  • Spring-operated brake with multipole system
  • Up to twice the braking torque compared to the BFK458
  • Fixed or adjustable braking torque
  • 'Cold brake' by holding current derating
  • Short operating times on AC side
  • Large working air gap means long maintenance intervals

Application areas:

  • Brake motors
  • Storage technology
  • Escalators
  • Cranes
  • Stage machinery
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