Series EPN4: 4 Stage Planetary Gearbox

Output speed 0.425‐445 r/min
Ratio range 140.36-3144.53
Input power 0.25‐55KW
Mounting position all positions
Mounting dimension Standard /Custom
Reduction ratio i >3
Permit torque range ≤ 540000N. M


Series EPN4: 4 Stage Planetary Gearbox

Our 4-stage planetary gearboxes (EPN4 series) are equipped with heavy-duty bearings on the low shaft. We designed it to withstand huge radial loads. Thanks to our R&D team, they made it easier for us to develop a 4-stage planetary gearbox with proportional torque distribution.
Each 4-stage planetary gearbox is case hardened for transmission efficiency. Additionally, they feature rigid and ductile iron housings that remain durable and reliable even in harsh operating environments.
As a planetary drive manufacturer, in addition to high performance, reliable load carrying capacity, and low-speed shaft bearings, all our 4-stage planetary gearboxes produce virtually no noise.
Furthermore, with our extensive experience in planetary gearboxes, we can obtain various output speeds and torques. You can use the planetary gear ratio formula to determine your unique application’s best 4-stage planetary gearbox.
You can find custom designs alongside our standard 4-stage planetary gearboxes.

Key Features
  • Modular design, combined according to customer requirement
  • Heavy bearing, Design for heavy-duty Application
  • Hardened gearing, long life with high reliability
  • Low-speed shaft design
Torque range 1000 … 540000 Nm Input IEC Flange
Mechanical rating (n1 = 1500 min-1) up to 200kW Electric motor
Gear ratios 140.36-3144.53 Solid input shaft with or without fan cooling – inch or metric dims.
Gear unit versions Applicable AC motors Integral motors and brake motors
Right angle (with bevel gear set) IEC-normalized motors and brake motors
Mounting type Foot Single and dual speed motors
Flange mounted Main brake features DC and AC supply
Torque-arm Faster brake reaction through electronically controlled rectifier
Output shaft options Solid shaft Main motor options Thermistors and thermostat sensors
Splined shaft Independent forced cooling
Female splined shaft Line driver and push-pull incremental encoder
Hollow shaft with shrink disc


EPN series planetary gearbox torque sheet with models

Gear unit size 200 201 240 241 280 281 353/354 355 400 401
Normal output torque
1500 2000 3500 4000 4300 7300 13000 16000 20000 23000
Gear unit size 428 429 445 446 510 542 543 695 810 885
Normal output torque
26000 30000 32000 43000 63000 75000 100000 150000 300000 420000