DJPZ-850 Series Motor Disc Brakes

DJPZ‑850 is a normally‑closed, AC‑powered electromagnetic disc brake designed for direct mounting on motor shafts (typically at the rear end) or reducer high‑speed shafts. It is a high‑torque, compact brake widely used in industrial drive systems for rapid stopping, positioning, and fail‑safe holding.

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Basic Identification

Model: DJPZ‑850 (part of the DJPZ series: 02–2000 Nm)

Type: Electromagnetic disc brake (motor‑mounted)

Rated braking torque: 850 Nm

Power supply: AC 220 V / 380 V (50 Hz, rectified to DC for coil)

Insulation class: B

Compliance: ISO 9001, ISO 14001, OHSAS 18001; EX/MA (explosion‑proof/mining optional)

Working Principle (Fail‑Safe Normally‑Closed)

Braking (power off): Heavy‑duty compression springs clamp the armature plate against the brake disc, creating friction to stop/hold the shaft.

Release (power on): The electromagnetic coil is energized, generating magnetic force to pull the armature plate away from the disc, freeing the shaft for rotation.

Manual release: Built‑in manual release lever for emergency disengagement during power failure.

Wear compensation: Automatic air‑gap adjustment maintains consistent braking performance as friction pads wear.

Key Technical Parameters (DJPZ‑850)

Parameter	Value
Rated braking torque	850 Nm
Brake disc diameter	350 mm
Overall dimensions (L×W×H)	390 mm × 422 mm × 195 mm
Mounting bolt	6‑M16
Coil power	~18 W
Operating frequency	Up to 720 cycles/hour (S3‑60%)
Duty cycle	S1‑100% (continuous) / S3‑25%/40%/60% (intermittent)
Weight	~72.4 kg
Ambient temperature	−20 °C to +50 °C
Relative humidity	≤ 90%
Altitude	≤ 2000 m

Core Features

Compact & motor‑integrated: Designed for direct mounting on motor shafts; saves space, easy installation.

Fail‑safe design: Automatically engages on power loss, critical for safety in lifting/hoisting.

Fast response: Near‑instant braking/release for high‑frequency operation.

Manual emergency release: Allows safe disengagement during power outages.

Low noise & high precision: Smooth braking, accurate positioning.

Asbestos‑free friction pads: Eco‑friendly, high wear resistance.

Low maintenance: Self‑lubricating pivots, easy pad replacement.

Corrosion‑resistant: Robust construction for harsh industrial environments.

Applications

Ideal for rapid stopping, precise positioning, and static holding in:

YEJ‑series electromagnetic brake motors

Cranes, hoists, winches, and lifting machinery

Wind turbine pitch/yaw drives

Metallurgical rolling mills and conveyors

Mining hoists and crushers

Elevators, escalators, and construction machinery

Machine tools, packaging, printing, and textile equipment

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