1. Product Overview & Model Definition
MW160-80 belongs to MW series normally closed spring-applied electromagnetic drum brake; MW = AC electromagnetic type, MWZ160-80 is DC powered variant.
160: Matching brake drum diameter: 160 mm
80: Rated braking torque: 80 N·mConforming to national industrial standard JB/T7685-2006, it is energy-saving block brake with fast response, widely used for safety stop and static holding of lifting, conveyor and metallurgical equipment.
2. Working Principle (Fail-Safe: Power-off Braking, Power-on Release)
Braking Condition (Power Cut / Blackout)
When electromagnet loses power, magnetic suction disappears; preloaded main compression springs push two brake arms outward, clamping the asbestos-free brake shoes tightly onto outer surface of 160mm brake drum. Friction generates rated torque to lock drum and stop rotation automatically (core safety design to prevent load falling during power failure).
Release Condition (Power Energized)
After power supply switches on, electromagnet produces strong magnetic pull to overcome spring preload, pulling brake arms apart; brake linings separate from drum surface with uniform clearance, equipment runs freely.Brake shoe clearance and spring preload can be finely adjusted via regulating bolts to compensate lining abrasion.
3. Core Technical Parameters of MW160-80
表格
| Item | Technical Data |
|---|---|
| Rated Braking Torque | 80 N·m |
| Matched Brake Drum Diameter | 160 mm |
| Supporting Electromagnet | DT-160 (AC), DTZ-160 (DC for MWZ type) |
| Rated Electromagnet Suction | 1000N (JC25% duty), 800N (JC40% duty) |
| Max/Initial Electromagnet Stroke | 6mm / 3mm |
| Standard Brake Shoe Clearance | 0.5 mm |
| Total Brake Weight | approx. 27.8 kg |
| Common Power Input | AC380V 50Hz (MW); DC220V (MWZ with rectifier) |
4. Structural & Performance Features
Quick-replace clamp-type friction lining: Integral molded non-asbestos pads, no need to disassemble whole brake body for replacement, eco-friendly and low maintenance cost.
Self-lubricating hinge bearings: All swing pivot points equipped with maintenance-free self-lubricated bearings, high transmission efficiency and long service life.
Uniform retraction mechanism: Dual-shoe equal clearance design avoids single-side lining dragging and uneven wear.
Fast braking response: Millisecond-level action speed, higher operating frequency than hydraulic thruster brakes, suitable for frequent start-stop working condition.
Energy-saving electromagnet: Low holding power consumption after armature pull-in, stable suction and low working noise.
Compact casting frame: High-strength cast steel base and brake arm, strong anti-deformation under alternating frequent load.
5. Allowed Operating Ambient Conditions
Ambient temperature: -25℃ ~ +40℃
Relative air humidity: ≤90%, no condensation dew
Working altitude: ≤1000m above sea level
Environment: No explosive gas, corrosive vapor or conductive dust; customized anti-rust coating available for damp/outdoor sites.
6. Main Application Fields
Hoisting machinery: Small electric hoists, overhead travelling cranes, winches for load anti-slip parking braking
Bulk conveying: Belt conveyors, bucket elevators anti-runaway emergency stop
Metallurgy & mining: Auxiliary drive deceleration and static holding for small roller transmission
Construction machinery: Mini winding equipment, light industrial processing machine safety brake
