TWZ-200 Series Foot Operated Hydraulic Drum Brakes

🛠️ Product Overview: TWZ-200 Series Foot-Operated Brake

The TWZ-200 is a Normally Open (常开), Foot-Treadle Operated Brake. It is designed for manual control, where the operator uses their foot to apply pressure to a treadle (pedal), which mechanically or hydraulically opens the brake jaws to allow motion. When the foot pressure is released, the brake automatically closes to stop or hold the load.23

🔤 Model Decoding

T: Treadle / Foot Operated (Jiao 脚)

W: Lever / Linkage (Gan 杆)

Z: Brake / Shoe (Zha 闸)

200: Frame Size / Brake Wheel Diameter (Approx. 200 mm).13

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📋 Key Specifications

Based on the technical data found:

表格

Parameter	Specification	Notes
Model	TWZ-200	Part of the TWZ (Foot Lever) series.
Actuation Method	Foot Pedal (Mechanical/Hydraulic)	Human power applied via lever mechanism.
Brake Wheel Diameter	200 mm	Fits a 200mm diameter brake wheel.
Max. Braking Torque	230 N·m	Rated stopping power.
Max. Operating Force	320 N	Force required on the pedal to actuate.
Weight	23 kg	Net weight of the assembly.

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✨ Key Features

Normally Open (NO) Design:
This brake is "Normally Open," meaning it stays open (released) when the pedal is in the "down" position and closes (applies) when the pedal is released. This is the opposite of the fail-safe TYWZ hydraulic brakes.

Equal Retreat Device:
It features a linkage-type equal retreat mechanism. This ensures that the clearance (distance) between the brake linings and the brake wheel is always equal on both sides, preventing one-sided wear or dragging.26

Self-Lubricating Bushings:
The main pivot points are equipped with self-lubricating bearings. This reduces friction, increases transmission efficiency, and eliminates the need for frequent greasing during maintenance.23

Tool-Free Lining Replacement:
The brake linings (friction pads) use a clip-in or card-type structure. This allows for very quick replacement without needing to disassemble the entire brake mechanism, minimizing machine downtime.23

Manual Operation:
It does not rely on electricity or hydraulics to function; it relies solely on the operator's foot force. This makes it simple, robust, and suitable for environments where power sources are limited.

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🏭 Typical Applications

The TWZ-200 is commonly used in:

Small & Medium Cranes: For controlling the travel mechanisms of overhead cranes.

Conveyors: Manual stopping/starting points.

Mining & Quarry Equipment: Where simple, manual control is preferred.

Workshop Machinery: Presses, shears, or winding machines.

💡 Usage Environment

Temperature: -20°C to +50°C.

Environment: Indoor or outdoor (protected). It should be kept free of explosive gases and corrosive vapors.1

Note on Variants: You may also encounter the TWZ2-200 or TWZB-200. The "B" version often indicates a different mounting style or compliance with German DIN standards, while the "2" may indicate a specific structural improvement in the linkage mechanism.

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