Spring-operated brakes

The versatile modular system INTORQ BFK458

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.

Features:

• 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

INTORQ Brake Coil BFK458-10-00457013

 

Compact and quickly installed INTORQ BFK457

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.

Features

• Braking torque: 0.12-125 Nm

• 9 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

 

Multipole spring-operated brakes

The new performance standard INTORQ BFK468

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.

Features

• 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

 

Multipole spring-operated brakes

For disc brakes up to 10,000 Nm INTORQ BFK466

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.

Features

• 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

 

Spring-applied brake

INTORQ BFK461, sealed design

The 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.

Features

• 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

 

Sector solutions 

For the safe raising and lowering of hoists INTORQ BFK454

This dual-circuit spring-operated brake is specially designed for geared motors in lift applications. It ensures safe operation as a holding brake and for emergency stop duties. It is TÜV tested and satisfies the TRA200 requirements for hoists.

Features:

• Braking torque: 15-400 Nm

• 7 sizes

• Small unit volumes with 80% redundant braking torque

• Low motor moment of inertia

• Adjustable braking torque

• Simple maintenance and monitoring of dual-circuit function

Application areas

Lifts, hoists

 

Electromagnetic clutches and brakes

Spring-operated brakes in servo motors INTORQ BFK418

Servo drives require holding brakes that have short operating times and very little torsional backlash. The temperature-resistant friction linings of the brakes are also ideally suited to handle emergency stops from high speeds. This makes the low-cost BFK418 a viable alternative to permanent magnet brakes, and not just from a technical point of view.

Features:

• Braking torque: 5-150 Nm

• Little torsional backlash

• Temperature-resistant

• Low moment of inertia compared to permanent magnet brakes

• Simple installation thanks to threaded holes in stator

• Preset working air gap

• Large shaft diameters possible

Application area

Servo motors

 

INTORQ 14.105 and 14.115

In machines that have a centralised drive, electromagnetic clutches and brakes control the speeds of lower-level drive assemblies. INTORQ products are characterised by short operating times, low motor moment of inertia and torque transfer with no torsional backlash.

Features:

• Clutch and braking torques from 7.5-480 Nm

• 7 sizes

• DC voltage: 24 V

• Thermal class B (130 °C)

• Torque transfer with no torsional backlash

• Wide range of applications thanks to the various types of magnet and armature element

• Short operating times and low motor moment of inertia mean high switching frequencies

Application areas:

Packaging machines, mechanical and apparatus engineering, gates, folding and printing machinery

 

Clutch-brake combinations

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

Features:

• Characteristic 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

 

Electrical accessories

Variable braking with INTORQ Control

Spring-operated brakes basically work on the on/off principle. The mechatronic INTORQ Control braking system enables the braking torque to be applied very precisely and adapted to the dynamic response of the drive. The ideal combination of mechanics and electronics.

Features:

• Variable braking torque M = 20-100% Mk

• DC voltages: 24, 48 V and mains-operated

• CAN bus for flexible networking

Operating modes

• Pedal-operated brakes (manual input of braking torque)

• Ramp-controlled brakes (time-controlled input of braking torque)

• Sensor-controlled brakes (load-dependent input of braking torque)

• Speed-controlled brake (stopping time independent of load and speed)

Application areas

Industrial trucks, escalators, cranes and automation technology

Other electrical accessories

• High-speed switchgear

• Electronic switchgear

• Half-wave and bridge rectifiers

• Spark suppressors

 

 

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