YW-L400/E121 Electro-Hydraulic Drum Brake

⚙️ Product Overview

The YW-L400/E121 is a heavy-duty, Electro-hydraulic Drum Brake belonging to the YW-L series. This model is specifically engineered for high-torque applications requiring robust stopping power and reliable holding capacity.

The model nomenclature typically breaks down as follows:

YW: Standard electro-hydraulic drum brake series.

L: Often indicates a specific design generation or "Long" stroke/lever configuration optimized for higher torque.

400: Indicates the compatible Brake Drum Diameter of 400 mm.

E121: Refers to the specific Electro-hydraulic Thruster model (Ed-121) used to actuate the brake, which provides the necessary force for high-load braking.

💡 Key Features & Characteristics

High Braking Torque:
Paired with the E121 (Ed-121) thruster, this brake delivers substantial braking force, making it suitable for large-scale industrial machinery. The E121 thruster is a powerful actuator designed for heavy-duty cycles.

Fail-Safe Operation:
The brake operates on a "normally closed" principle. It engages via spring force when power is cut (emergency stop) and releases only when the thruster is energized, ensuring safety during power failures.

Interlocking Equalization:
The mechanism features an interlocked equalizing device that ensures the brake shoes retract evenly from the drum. This prevents uneven wear on the linings and eliminates residual drag (torque) when the brake is released.

Robust Construction:
Designed to withstand harsh environments, the YW-L series typically features corrosion-resistant coatings and high-strength structural components, suitable for outdoor or metallurgical applications.

Adjustable Performance:

Torque Adjustment: The braking torque can be adjusted by changing the spring pre-load.

Stroke Adjustment: The thruster stroke can be tuned to compensate for lining wear, maintaining consistent performance over time.

🏭 Typical Applications

Due to its large size (400mm drum) and high-power thruster (E121), this brake is used in heavy industrial sectors:

Port Machinery: Large ship-to-shore cranes and heavy-duty gantry cranes.

Mining: High-tension belt conveyors and large hoists.

Metallurgy: Steel mill cranes, rolling mills, and continuous casting machines.

Excavators: Large-scale draglines or mining excavators.

📋 General Technical Specifications

Note: The E121 designation specifically refers to the thruster's nominal force rating. When replacing parts, ensure the mounting dimensions of the thruster match the brake arm geometry of the YW-L400 series.

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