In Minimal Installation Space: Maximum Performance

With the BFK518 spring-applied brake, INTORQ from Aerzen, Ger­many, is set­ting new stan­dards. The robust and easy-to-install hold­ing brake with emer­gency stop func­tion for ser­vo motors offers max­i­mum brak­ing torque while requir­ing min­i­mum space. A rev­o­lu­tion on the market.
The com­pa­ny pre­sent­ed the new prod­uct as a world’s first at SPS 2019. “Our new spring-applied brake com­bines the advan­tages of a spring-applied brake with the per­for­mance of a per­ma­nent mag­net brake,” explained Ralph Kro­ne, Key Account Man­ag­er at INTORQ. With its high and reli­able hold­ing torque, small dimen­sions, and high tem­per­a­ture sta­bil­i­ty, the spring-applied brake suits a wide vari­ety of appli­ca­tions – from robot­ics to pack­ag­ing tech­nol­o­gy to pro­duc­tion machines.

High braking torque due to new process

The extreme­ly high brak­ing torque of the BFK518 – con­sid­er­ing its size – is the result of the large fric­tion radius of the rotor and the small air gap, which is pro­duced with­in a nar­row tol­er­ance range. A flange man­u­fac­tured as a bent sheet met­al part serves as a sup­port struc­ture that tight­ly abuts the rotor – this means the fric­tion sur­face is used 100%.

“This new tech­nol­o­gy is rev­o­lu­tion­ary and makes our spring-applied brake unri­valed in the mar­ket. It ensures max­i­mum reli­a­bil­i­ty of the brake.” — Ralph Kro­ne, Key Account Man­ag­er at INTORQ

Flexible mounting position, easy installation, stable price

Unlike per­ma­nent mag­net brakes, spring-applied brakes do not require any set­ting work, which saves time and pre­vents errors. The BFK518 from INTORQ also does not require axi­al posi­tion­ing, the fric­tion disc is designed to auto­mat­i­cal­ly set the cor­rect posi­tion. The instal­la­tion posi­tion of the brake is flex­i­ble. It can be quick­ly and con­ve­nient­ly mount­ed on the motor’s fixed or float­ing bear­ing. Unlike per­ma­nent mag­net brakes, elec­tro­mag­net­ic spring-applied brakes do not require rare earth mag­nets, which keeps the cost of goods stable.

Safety during power failure

Spring-applied brakes are fail­safe brakes. Mul­ti­ple com­pres­sion springs pro­duce the brak­ing torque in the de-ener­gized state through fric­tion­al lock­ing. Even if the pow­er fails, the fail­safe brake ensures com­plete safe­ty. The brake is released elec­tro­mag­net­i­cal­ly: the coil of the sta­tor is ener­gized with DC volt­age. The result­ing mag­net­ic flux works against the spring force to draw the arma­ture plate to the stator.