EP-PGR60 Planetary Gear Reducer — 60 KW, 12.41:1 Ratio for Electric Motor Drive

EP-PGR60 Planetary Gear Reducer — Product Overview

A Completely Different Gear Architecture

Every other Korea Ever-Power gearbox uses spiral bevel gears that turn the shaft axis 90 degrees. The EP-PGR60 breaks this pattern entirely: it uses a planetary gear train where multiple planet gears orbit around a central sun gear inside a ring gear, producing deep speed reduction in a compact, coaxial configuration. The input and output shafts are on the same centerline — no right-angle turn, no shaft offset. This architecture enables the extreme 12.41 : 1 ratio that no single-stage bevel gear set can achieve.

Electric Motor Input at 1,440 RPM

While all other Korea Ever-Power gearboxes connect to tractor PTO shafts (540 rpm) or harvester engine outputs (500 rpm), the EP-PGR60 is designed for electric motor drive. Its input accepts the standard 1,440 rpm output of a 4-pole 50 Hz electric motor — the most common industrial motor configuration in Korean and Asian agricultural processing facilities. This makes the EP-PGR60 the bridge between electric power and the low-speed, high-torque demands of stationary agricultural machinery.

116 RPM at 12.41× Torque Multiplication

The 12.41 : 1 ratio converts the motor’s high-speed, low-torque output into 116 rpm with 12.41× torque multiplication. At 60 KW input, this produces approximately 4,940 Nm of output torque — the force needed to drive large-capacity feed mixers, grain conveyors, seed processing rotors, and industrial straw shredders. No other Korea Ever-Power gearbox approaches this torque output or this reduction depth.

Full Technical Specifications

Planetary vs. Bevel Gear — Why Different Applications Need Different Architectures

Korea Ever-Power uses two fundamentally different gear architectures, each optimized for the applications it serves best:

12.41 : 1 Deep Reduction — How the Planetary Gear Train Achieves It

Multi-Stage Planetary Arrangement

The EP-PGR60 achieves 12.41 : 1 through a multi-stage planetary gear train. The motor drives a small sun gear, which meshes with multiple planet gears that orbit inside a fixed ring gear. The planet carrier rotates at a reduced speed determined by the tooth count relationship between sun, planet, and ring. By cascading two or more planetary stages in series, the EP-PGR60 compounds the reduction of each stage to achieve the total 12.41 : 1 ratio in a compact, coaxial package barely larger than the motor itself.

Load Sharing Across Multiple Planets

In a bevel gearbox, a single gear pair carries the entire torque load. In the EP-PGR60’s planetary arrangement, three or four planet gears share the load simultaneously. This multi-path torque transmission produces dramatically higher torque density — the ability to handle more torque per unit of gearbox volume and weight. The 4,940 Nm output torque would require a bevel gearbox several times larger and heavier than the EP-PGR60’s planetary housing to achieve safely.

Coaxial Input/Output Alignment

The planetary architecture places the input and output shafts on the same centerline. This coaxial alignment means the electric motor bolts directly to the gearbox input without offset brackets, coupling adapters, or shaft alignment procedures. The motor-gearbox assembly forms a single compact unit that mounts in any orientation — horizontal, vertical, or angled — without affecting gear mesh accuracy or bearing loading. This installation flexibility is critical for agricultural processing machinery where space constraints and mounting orientations vary widely between equipment designs.

Electric Motor Integration — From 1,440 RPM to Agricultural Torque

Application Scenarios

Feed Mixing Equipment

Large-capacity feed mixers blend grain, forage, vitamins, and minerals into uniform animal feed. The mixing paddles or augers require slow, high-torque rotation (80–120 rpm) to turn the heavy feed mass without stalling. The EP-PGR60’s 116 rpm output and 4,940 Nm torque provide exactly the mechanical characteristics these mixers need — far more efficiently than hydraulic drives or belt-reduction systems that lose significant power to friction.

Grain Handling & Conveyor Systems

Grain elevators, bucket conveyors, and screw augers in grain storage facilities run from electric motors and require sustained low-speed, high-torque output to move heavy grain volumes reliably. The EP-PGR60 provides this at 116 rpm with the torque authority to handle start-up loads from full grain bins — one of the most demanding loading conditions in grain-handling system design.

Stationary Straw & Biomass Processing

Fixed-installation straw shredders, biomass pellet presses, and composting drum rotators all need motor-driven low-speed, high-torque drives. The EP-PGR60’s coaxial design and multi-orientation mounting capability make it adaptable to the diverse machine configurations found in Korean and Asian biomass processing facilities. When paired with a VFD, the output speed can be tuned to match the specific material being processed.

Why Choose the EP-PGR60

Installation & Maintenance

Mounting Procedure

❶ Bolt the electric motor to the EP-PGR60’s input flange. Coaxial alignment is automatic — no laser alignment required. Torque motor mounting bolts to specification.

❷ Mount the motor-gearbox assembly to the driven equipment’s base frame. The EP-PGR60 can mount in any orientation (horizontal, vertical, inverted).

❸ Connect the output shaft to the driven element using a coupling, flange, or drive shaft as required by the equipment design.

❹ Fill with synthetic gear oil per the EP-PGR60 specification plate. Run a 10-minute no-load test verifying smooth operation, correct output rotation direction, and zero oil leakage.

Maintenance Schedule

◆ Weekly (high-duty applications) — Check oil level; listen for abnormal noise during operation.

◆ After first 200 hours — First oil change: drain, flush, refill with synthetic gear oil.

◆ Every 2,000 hours / annually — Full oil change; inspect output shaft seal; check mounting bolt torque.

◆ Every 5,000 hours — Inspect planet gear bearings; check ring gear tooth condition; verify sun gear mesh pattern.

◆ Synthetic oil is required — The high input speed (1,440 rpm) and compound planetary mesh generate more heat than PTO-speed bevel gearboxes. Synthetic oil maintains viscosity at elevated temperatures for consistent lubrication and extended service life.

Companion Products & Agricultural Equipment Range

Field Equipment Gearboxes

While the EP-PGR60 serves stationary motor-driven processing equipment, Korea Ever-Power’s field equipment range covers mobile PTO-driven applications: rotary cultivator gearbox assemblies for tillage (40–150 KW) and round baler gearbox units for straw management. Together with the EP-PGR60, Korea Ever-Power covers both field and facility power transmission requirements.

Frequently Asked Questions

Customer Reviews & Field Reports