DJPZ-300 Motor Disc Brakes

DJPZ-300 motor disc brakes

DJPZ-300 is a normally closed, spring‑applied electromagnetic motor disc brake from the DJPZ series, designed for direct mounting on motor shafts (e.g., Y‑series motors to form YEJ brake motors) or high‑speed reducer shafts. It is a compact, fail‑safe brake for precise stopping and holding.

DJPZ: Motor‑mounted electromagnetic disc brake series

300: Size designation, rated braking torque 300 N·m (some variants marked 530 N·m)Compliant with industry standards, it is widely used in metallurgy, construction, mining, packaging, and general machinery for fast parking and accurate positioning.

2. Working Principle (Fail‑Safe: Power‑Off Braking, Power‑On Release)

Braking (Power OFF / Emergency)

When the electromagnet is de‑energized, pre‑loaded coil springs push the armature plate toward the friction disc, clamping it tightly between the armature and the brake housing. The resulting friction generates 300 N·m torque to lock the motor shaft, ensuring automatic braking during power failure (critical safety feature).

Release (Power ON)

When AC220V/380V is supplied, the rectified DC electromagnet (DC99V/170V) produces magnetic pull that overcomes spring force, pulling the armature away from the friction disc. The disc rotates freely with minimal drag, allowing normal motor operation.A manual release lever enables emergency brake release during power outages.

3. Key Technical Parameters

表格

4. Core Features

Normally closed fail‑safe design: Springs apply brake on power loss; prevents load drops or runaway.

Compact & direct‑mount: Installs on motor tail or reducer shaft; no extra linkage needed.

Fast response & high frequency: Suitable for frequent start‑stop cycles; low noise.

Manual emergency release: Lever for power‑outage maintenance or reset.

Quick‑replace friction disc: No full disassembly; reduces downtime.

Class B coil insulation: Durable for continuous industrial use.

5. Operating Conditions

No explosive gas, corrosive vapor, or conductive dust.

Friction surfaces must be clean (no oil/dust) during installation.

Custom coatings available for humid/outdoor sites.

6. Main Applications

Brake motors: YEJ‑series for cranes, conveyors, machine tools.

Material handling: Winches, hoists, belt conveyors (anti‑runaway).

Metallurgy & mining: Roller tables, crushers, and walking mechanisms.

General machinery: Packaging, textile, and printing equipment for positioning.

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