YW-K Normally Open Brake – Zero Drag Wear, Smooth Crane Travel Deceleration

YW-K Normally Open Brake

Different from conventional power-off fail-safe closed brakes (YWZ4/YWZ8), YW-K series adopts a unique normally-open structural design. Under power-off state, the internal spring keeps brake shoes fully retracted away from the brake drum without any contact friction. Only when the electro-hydraulic thruster is energized will the brake clamp the drum to realize active deceleration and emergency stop. It is specially developed for crane travel trolleys, belt conveyors and metallurgical transfer carts to solve excessive friction lining wear caused by long-term shoe-drum dragging during equipment operation.

Core Selling Advantages

Normally-open design, zero idle drag wear (core highlight)Power-off release structure completely separates friction linings from the brake drum during normal running. There is no continuous friction loss, which can greatly extend the service life of friction blocks and reduce frequent replacement costs. Avoid overheating and premature aging of linings in long-time continuous operation.

Smooth and controllable travel decelerationMatched with standard ED electro-hydraulic thrusters, the braking torque can be adjusted freely via the spring scale. The braking process is soft without sharp impact, effectively reducing trolley shaking, gearbox shock and cargo swing during crane travel speed reduction.

Built-in auto equal clearance balancing mechanismInterlocking linkage automatically maintains uniform gap between two brake shoes. No repeated manual gap calibration is needed, eliminating unilateral dragging and uneven lining abrasion, lowering daily maintenance workload significantly.

Low-maintenance integrated structure

All hinge joints adopt maintenance-free self-lubricating bearings, periodic greasing is not required;

Snap-in plug-type non-asbestos friction linings support rapid replacement without disassembling the whole brake frame;

Sealed spring tube prevents dust, rust and debris from corroding internal springs, stabilizing long-term braking performance.

Flexible matching and customized optionsStandard configuration supports vertical installation; custom horizontal transition brackets for narrow trolley space. BEd flameproof thruster matching is available for underground mines and chemical flammable hazardous zones. Optional travel limit switches feed back brake engagement/release signals to realize PLC safety interlock control. Rainproof & dustproof outer covers and anti-corrosion coating can be customized for open-air port and high-dust workshops.

Main Application Scenarios

Overhead crane & gantry crane travel trolleys, horizontal belt conveyors, metallurgical transfer carts, light-duty mining conveyors and all travel mechanisms that require long-time continuous operation and active controlled deceleration.

Working Conditions

Ambient temperature: -20℃ ~ +50℃Support voltage of matched ED thruster: AC380V; AC220V/660V customizableCompliant with JB/T 6406 industrial brake standardExplosion-proof version reaches Ex d I / Ex d IIB T4 grade

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