MW710-8000 is a heavy-duty, normally‑closed, AC‑powered electromagnetic drum brake designed for high‑torque industrial braking applications. It belongs to the MW(Z) energy‑saving electromagnetic drum brake series.
Basic Identification
Model: MW710‑8000
Type: Electromagnetic drum brake (MW series)
Brake drum diameter: 710 mm
Rated braking torque: 8000 Nm
Matching electromagnet: DT‑710
Total weight: Approx. 403–419 kg
Standards: Complies with JB/T 7685‑2006 (technical requirements) and JB/ZQ 4388‑86 (mounting dimensions & torque)
Working Principle
It is a fail‑safe, normally‑closed brake:
Braking (power off): Built‑in heavy‑duty compression springs apply strong clamping force to the brake shoes, firmly gripping the drum to stop or hold the load.
Release (power on): The DT‑710 AC electromagnet is energized, generating magnetic force to overcome spring tension. It retracts the brake shoes via a lever mechanism, freeing the drum for rotation.
Automatic wear compensation: Equipped with an equal back‑distance device to maintain consistent braking performance as linings wear.
Key Technical Parameters
表格
| Parameter | Value |
|---|---|
| Rated braking torque | 8000 Nm |
| Brake drum diameter | 710 mm |
| Matching electromagnet | DT‑710 |
| Electromagnet suction force | 15000 N |
| Max. working stroke | 10 mm; Initial stroke: 6 mm |
| Operating frequency | 600 cycles/hour |
| Duty cycle | 100% |
| Power supply | 3‑phase AC 380 V, 50 Hz |
| Total weight | ~403 kg |
Key Features
Fail‑safe design: Automatically engages on power loss, ensuring critical safety in heavy machinery.
High‑torque capacity: Delivers up to 8000 Nm for heavy‑duty braking.
Energy‑saving electromagnetic system: High efficiency, suitable for frequent operation (up to 600 cycles/hour).
Self‑lubricating bearings: At main pivot points, no maintenance lubrication required, long service life.
Asbestos‑free brake linings: Eco‑friendly, high friction, long wear life.
Easy maintenance: Simple lining replacement and air‑gap adjustment.
Corrosion‑resistant construction: Robust design for harsh industrial environments.
Operating Conditions
Ambient temperature: −20 °C to +50 °C
Relative humidity: ≤ 90%
Altitude: ≤ 2000 m
Environment: No flammable, explosive, corrosive gases, or conductive dust
Applications
Ideal for deceleration, stopping, and static holding in heavy‑duty machinery:
Large cranes, hoists, winches
Port handling equipment (ship loaders/unloaders)
Metallurgical rolling mills and conveyors
Mining hoists and crushers
Heavy construction machinery
Large belt conveyors
