The YWZ8 series electric hydraulic drum brake is a compact, high-performance braking solution engineered for industrial applications where reliable stopping power and space-efficient design are equally important. With a braking torque range of 135 to 1600 N·m, the YWZ8 series provides precise control for medium-duty crane, hoist, and machinery applications across manufacturing, mining, ports, and power generation sectors.
Featuring spring-applied, hydraulic-release operation and compatibility with both Ed series and YT1 series electro-hydraulic thrusters, the YWZ8 series delivers the fail-safe reliability required for safety-critical lifting operations while maintaining a compact footprint that fits space-constrained installations.
Key Specifications at a Glance
| Parameter | Specification |
|---|---|
| Braking Torque Range | 135 – 1600 N·m |
| Brake Wheel Diameter | 200 – 400 mm |
| Operating Temperature | -20°C to +50°C |
| Relative Humidity | ≤ 90% |
| Altitude | ≤ 2000m (per GB755-2000) |
| Thruster Compatibility | Ed series, YT1 series |
| Design Standard | JB/T 6406 |
Why Choose YWZ8 Series Drum Brakes?
1. Compact Footprint for Space-Constrained Applications
The YWZ8 series features a space-efficient design that makes it ideal for installations where mounting space is limited. The optimized mechanism geometry delivers full braking performance in a smaller envelope than comparable brake models. This compactness is particularly valuable for:
- Retrofit installations with limited mounting clearance
- Crane hoists with confined motor housings
- Multiple brake installations in compact machinery frames
2. Versatile Thruster Compatibility
The YWZ8 series works with both Ed series (modern DIN 15430 compliant) and YT1 series electro-hydraulic thrusters, providing flexibility for new installations or replacement of legacy braking systems. This dual compatibility allows:
- Easy retrofit with existing YT1 thrusters
- Upgrade to modern Ed series for new specifications
- Standardized thruster inventory for maintenance operations
3. Spring-Applied Fail-Safe Design
Like all quality industrial drum brakes, the YWZ8 series employs spring-applied, hydraulic-release operation. The brake automatically engages when hydraulic pressure is removed, ensuring load security during power failures or hydraulic system interruptions. This fail-safe behavior is essential for hoist and crane applications where personnel safety depends on reliable braking.
4. Wide Application Coverage
The YWZ8 series covers a broad range of industrial applications from 135 N·m to 1600 N·m, making it suitable for:
- Industrial cranes and hoists (200-400mm brake wheels)
- Power plant equipment (generators, pumps, conveyors)
- Mining machinery (elevators, Crushers, conveyors)
- Port machinery (container cranes, straddle carriers)
- Metallurgical equipment (rolling mills, material handling)
YWZ8 Series Model Specifications
Select the optimal YWZ8 model based on your required braking torque, brake wheel diameter, and thruster preference. All models feature the same compact, reliable construction.
| Model | Brake Wheel (mm) | Thruster | Braking Torque (N·m) | Weight (kg) |
|---|---|---|---|---|
| YWZ8-200/E23 | 200 | Ed 23/5 | 135-200 | 35 |
| YWZ8-200/E30 | 200 | Ed 30/5 | 135-310 | 43 |
| YWZ8-300/E30 | 300 | Ed 30/5 | 200-320 | 65 |
| YWZ8-300/E50 | 300 | Ed 50/6 | 200-550 | 80 |
| YWZ8-300/E80 | 300 | Ed 80/6 | 350-850 | 92 |
| YWZ8-400/E50 | 400 | Ed 50/6 | 600-750 | 120 |
| YWZ8-400/E80 | 400 | Ed 80/6 | 700-1250 | 135 |
| YWZ8-400/E121 | 400 | Ed 121/6 | 1000-1600 | 155 |
Note: All models available with YT1 series thrusters as alternatives. Contact our engineering team for custom specifications or explosion-proof configurations.
YWZ8 Series vs YWZ4 vs YWZ9: Which Series is Right for You?
| Feature | YWZ8 Series | YWZ4 Series | YWZ9 Series |
|---|---|---|---|
| Torque Range | 135 – 1600 N·m | 100 – 8000 N·m | 200 – 16000 N·m |
| Key Advantage | Compact design | Versatile, proven | Auto wear compensation |
| Max Torque | 1600 N·m | 8000 N·m | 16000 N·m |
| Thruster Options | Ed, YT1 | Ed, YT1 | Ed only |
| Maintenance | Standard adjustment | Standard adjustment | Auto compensation |
| Best For | Space-constrained | General industrial | Heavy-duty, high-cycle |
Choose YWZ8 when: You need reliable braking performance in a compact package. The YWZ8 series is ideal for retrofit installations with limited space or applications where brake footprint is constrained by machinery design.
How YWZ8 Series Drum Brakes Work
The YWZ8 series operates on the same proven spring-applied, hydraulic-release principle as other quality industrial drum brakes:
Braking Phase (Power Off)
- When electrical power is cut, the thruster releases hydraulic pressure
- Compression springs immediately apply force to the brake shoes
- Brake shoes press against the rotating brake drum
- Friction generates the rated braking torque, stopping the load
Release Phase (Power On)
- Electrical power activates the electro-hydraulic thruster
- Thruster motor drives hydraulic pump, building pressure
- Hydraulic force overcomes spring pressure
- Brake shoes release from drum, allowing free rotation
Primary Applications
Cranes & Hoists
The YWZ8 series provides reliable stopping power for industrial cranes, hoists, and winches in manufacturing, warehousing, and construction applications. The compact design fits easily into hoist reducers and crane trolley frames.
Power Generation
In power plants, YWZ8 brakes control generators, pumps, and cooling tower fans. The fail-safe design ensures equipment stops safely during emergency shutdowns or power grid disturbances.
Mining & Material Handling
Mining equipment including elevators, crushers, and conveyors rely on YWZ8 brakes for controlled stopping in dusty, high-vibration environments. The robust construction withstands the harsh conditions of underground and surface mining operations.
Port & Container Handling
Port cranes and container handling equipment use YWZ8 brakes for trolley travel and hoist functions where moderate torque capacity meets space constraints of existing machinery.
Installation & Maintenance
Installation Guidelines
- Verify mounting dimensions match your equipment (refer to dimensional drawings)
- Ensure proper alignment with the drive motor and gearbox
- Connect hydraulic lines using proper fittings and torque specifications
- Set brake clearance to specifications (typically 0.7-1.0mm depending on model)
Maintenance Schedule
- Monthly: Visual inspection for oil leaks, verify mounting security
- Quarterly: Check brake clearance, inspect brake pad wear
- Annually: Full brake inspection, thruster service, torque verification
- As needed: Replace brake pads when worn to minimum thickness
Frequently Asked Questions
What is the difference between YWZ8 and YWZ4 drum brakes?
YWZ8 and YWZ4 are similar in principle but optimized for different applications. YWZ8 has a more compact design with torque range up to 1600 N·m, while YWZ4 offers higher torque capacity (up to 8000 N·m) in a larger envelope. Choose YWZ8 for space-constrained installations; choose YWZ4 when maximum torque or thruster flexibility (Ed + YT1) in larger sizes is needed.
Can YWZ8 brakes use YT1 thrusters?
Yes, YWZ8 brakes are compatible with both Ed series (modern DIN 15430 compliant) and YT1 series electro-hydraulic thrusters. This allows flexibility in new installations and easy replacement of legacy thrusters. The mounting interface is designed for direct compatibility with standard YT1 configurations.
What is the correct brake clearance for YWZ8?
YWZ8-200 models typically require 0.7mm clearance between brake shoes and drum. YWZ8-300 and YWZ8-400 models require 1.0mm clearance. Proper clearance is critical for braking performance—too tight causes drag and overheating, too loose reduces braking torque. Use feeler gauges for accurate measurement during installation.
What hydraulic pressure do YWZ8 brakes require?
YWZ8 brakes use standard electro-hydraulic thrusters that generate hydraulic pressure internally when powered. The thrusters (Ed or YT1 series) are designed for 380V/50Hz three-phase operation. No external hydraulic power supply is needed—the thruster contains its own integrated hydraulic pump and cylinder.
Are YWZ8 brakes suitable for outdoor applications?
Yes, YWZ8 brakes with IP65-rated thrusters can operate in outdoor environments with ambient temperatures from -20°C to +50°C and humidity up to 90%. For outdoor or marine applications, specify anti-corrosion thruster options and consider regular inspection schedules to address any environmental wear.
Related Products & Accessories
Complete your braking system with these compatible products:
- Ed Series Electro-Hydraulic Thrusters – Modern DIN 15430 compliant thrusters for YWZ8 brakes
- YT1 Series Electric Hydraulic Actuators – Cost-effective alternative thrusters
- YWZ4 Series Electric Hydraulic Drum Brakes – Standard industrial brake for higher torque applications
- YWZ9 Series Electric Hydraulic Drum Brake – Heavy-duty option with automatic wear compensation
- ZDL Series Brake Wheels – Compatible brake wheels in 200-400mm diameters
Request a Quote for YWZ8 Series Drum Brakes
Get the compact, reliable braking solution your industrial application demands. Our engineering team can help you select the optimal YWZ8 model based on your torque requirements, space constraints, and thruster preferences.
Contact us today to discuss your application, request dimensional drawings, or receive a detailed quotation for YWZ8 series drum brakes.
