YWZ4-150/E30 is a compact electro-hydraulic drum brake built for hoists, workshop cranes, trolley travel, slewing drives, conveyor head pulleys and winch front stages. It runs on a matched Ed30/5 electro-hydraulic thruster, spring-applied braking and power-on release. When the power fails, the spring locks the shoe - no air, no hydraulics, no doubt.
It is the direct upgrade of the old YWZ3 drum brake: same mounting footprint, better equal-clearance linkage, card-mounted lining you swap without dismantling the shoe, and a torque scale on the spring tube for fast site checking.
Key Selling Points
120 N·m rated braking torque, Ø150 mm wheel, only 29 kg - light, stiff, easy to handle.
Matched Ed30/5 thruster: 300 N thrust, 50 mm stroke, F-class motor, S1 continuous + S3-60% up to 1200 cycles/h.
Equal-retreat linkage - both shoes back off evenly, no single-side drag, no uneven lining wear.
Card-mounted non-asbestos lining - change the pad in minutes, no shoe disassembly.
Torque scale on spring tube - set and read spring preload on site, no guesswork.
Self-lubricated pivot bushings - low maintenance, smooth action.
NC fail-safe: power off = brake on. Standard safety behavior for lifting and travel drives.
Flexible voltage: 380 V 50 Hz standard, 440–460 V 60 Hz or other on request.
Standard-compliant: dimensions to JB/ZQ4388-86, technical to JB/T 6406-2006, thruster interface to DIN 15430.
|
Item |
YWZ4-150/E30 |
|---|---|
|
Brake torque |
120 N·m |
|
Brake wheel diameter D |
150 mm |
|
Retreat / clearance E |
0.6 mm |
|
Matched thruster |
Ed30/5 |
|
Thruster thrust |
300 N |
|
Thruster stroke |
50 mm |
|
A |
347 mm |
|
b |
90 mm |
|
C |
160 mm |
|
d |
17 mm |
|
F |
175 mm |
|
G1 |
100 mm |
|
G2 |
170 mm |
|
H |
461 mm |
|
h1 |
140 mm |
|
i |
60 mm |
|
K |
150 mm |
|
M |
144 mm |
|
n |
8 |
|
G3 |
70 mm |
|
Weight |
29 kg |
|
Operating duty |
S1 continuous + S3-60%, 1200 cycles/h |
|
Voltage |
AC 3-phase, 380 V 50 Hz std; 440–460 V 60 Hz optional |
|
Ambient temp. |
−20 °C to +40 °C |
|
Relative humidity |
≤ 90% |
|
Protection |
IP rating by thruster; enclosure suitable for indoor industrial use |
|
Lining |
Card-mounted, non-asbestos half-metal available |
