Techdrives offers BFK457 spring-applied brakes

Techdrives' Intorq BFK457 range of spring-applied brakes is inexpensive and can be fitted extremely quickly.

The BFK457 is available in seven sizes ranging from the miniature, with a diameter of 37mm and a rating of 0.12Nm, up to the standard size-16 with a diameter of 190mm and a torque of 125Nm.

Two different designs are available.

The Basic design requires customers to provide a surface for mounting and friction that should be smooth and ferrous.

This is the lowest-cost option.

The Compact design comes fully assembled with its own mounting surface.

The air gap is preset and Compact brakes are particularly fast and easy to mount.

These spring-applied brakes generate torque by multiple springs that push together an armature plate, a rotating brake disc and a fixed mounting surface.

The brake disc carries friction material that results in smooth and regular torque ratings.

The brake is released when current is applied to a DC coil.

The resulting magnetic flux pulls back to the armature plate and frees the brake disc.

Coil-rated voltages are either 24 or 205V DC, the latter for rectified mains voltages.

The BFK457 range is simple but still has a number of options.

A manual brake-release lever can be specified to allow the brake to be released without electrical power.

For use in noise-sensitive areas such as hospitals and theatres, a low-noise brake disc can be supplied, guaranteeing noise levels below 50dbA.

In applications that are particularly safety sensitive, a double brake with piggy-back mounting is available.

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