EP-EG Series Feed Mixer Planetary Gearbox

Fact 1

Rated output torque reaches 30,000 N·m, making the EP-Feed Mixer Planetary Gearbox one of the highest-capacity planetary mixer gearboxes in its class for heavy-duty feed mixing equipment.

Fact 2

The gears are precision ground to ISO 1328-1:1995 Grade 5–6, with a surface roughness Ra ≤ 0.8 µm, ensuring smooth, low-noise operation even under continuous heavy loads.

Fact 3

The vertical mounting configuration is specifically optimized for the auger-drive shaft arrangement found in TMR vertical feed mixer wagons widely used on dairy and beef cattle operations across Colombia.

Fact 4

Supports single-input and double-input spline shaft configurations, plus optional hollow-shaft, shrink-disc, external-spline, or solid keyed output shafts — providing wide compatibility with most mixer OEM designs.

Fact 5

The housing carries an IP65 protection rating, fully resistant to dust ingress and water jets — a critical requirement on farms in Colombia's varied climates, from the humid Magdalena Valley to the high-altitude Sabana de Bogotá.

1. Exceptional Torque Density

With a peak output of 30,000 N·m distributed across three planet gears per stage, the EP-EG Feed Mixer Planetary Gearbox delivers torque-to-weight ratios that outperform traditional parallel-shaft reducers by a significant margin. This means you can install a lighter, more compact gearbox without sacrificing the raw power needed to handle heavy, fibrous TMR mixes containing silage, hay, and wet grains — materials that impose sudden peak loads on the drive train during start-up and mixing reversals.

2. Hardened Alloy Steel Gears for Extended Service Life

Every gear in the EP-EG Series Feed Mixer Planetary Gearbox is machined from 20CrMnTi alloy steel, carburized using a controlled atmosphere multi-furnace process, and then quenched to achieve a surface hardness of 58–62 HRC with a case depth of 0.6–1.5 mm. The core hardness is retained at 33–48 HRC, providing the toughness to absorb shock loads without brittle fracture. After heat treatment, gears are precision ground to ISO Grade 5–6, resulting in quiet, smooth transmission across the full torque range throughout the gearbox's operational lifetime.

3. Modular, Multi-Configuration Design

The EP-Feed Mixer Planetary Gearbox is engineered on a modular platform that accommodates a wide variety of input and output shaft arrangements without requiring a complete redesign. Input options include a keyed solid input shaft, single spline, or double spline. Output can be delivered through a solid keyed shaft, a hollow shaft with shrink-disc connection, an external spline shaft, or an internal spline bore — ensuring that this planetary mixer gearbox can be retrofitted to most vertical feed mixer wagons currently operating in Colombia and across Andean markets without costly custom engineering.

4. High Efficiency Across the Full Operating Range

Each gear stage of the EP-Feed Mixer Planetary Gearbox achieves a mechanical transmission efficiency of 97–98%, resulting in an overall system efficiency of ≥96% in a 2-stage configuration. Less energy is wasted as heat, reducing operating costs on farms where diesel or electric power represents a significant running expense. This efficiency advantage directly translates to lower fuel consumption for PTO-driven feed mixer wagons — an important economic consideration for cattle farmers in regions such as Medellín, Cali, and the Coffee-Growing Axis of Colombia where energy and fuel costs are closely monitored.

5. Robust Sealing and Environmental Protection

Operating on agricultural sites means constant exposure to dust, moisture, feed residues, and occasional pressure washing. The EP-EG Feed Mixer Planetary Gearbox incorporates radial shaft seals, O-ring face seals on all inspection covers, and a cast-iron housing treated with high-adhesion corrosion-resistant primer and enamel topcoat. The IP65 ingress protection rating guarantees reliable operation in the open-air environments of Colombian feedlots, milking barns, and mobile TMR wagon applications, where weatherproofing directly impacts maintenance intervals and total cost of ownership.

Housing

HT250 gray cast iron, with a minimum tensile strength of 250 MPa. Cast iron provides excellent vibration damping and dimensional stability, and its inherent rigidity prevents housing distortion under heavy gear separating forces. The exterior receives an epoxy-based corrosion-resistant primer followed by a polyurethane enamel topcoat.

Gears (Sun, Planet, Ring)

20CrMnTi chromium-manganese-titanium alloy steel. After rough and semi-finish machining, gears undergo controlled atmosphere carburization at 920–940°C for 6–12 hours, followed by oil quenching and low-temperature tempering at 180–200°C. Final surface hardness: 58–62 HRC. All flanks are precision-ground using CNC profile grinding machines.

Shafts & Planet Carrier

42CrMo4 chromium-molybdenum alloy steel (equivalent to AISI 4140), heat-treated to 28–32 HRC for a balance of tensile strength and machinability. The planet carrier is typically produced as a one-piece ductile iron casting or a welded steel fabrication, depending on frame size, ensuring it can withstand the full bending moment from the auger load.

Bearings

Tapered roller bearings and cylindrical roller bearings from grade-matched suppliers are used at all shaft positions. Bearing selection follows ISO/TR 1281-1 fatigue life calculation methodology, targeting an L10h life in excess of 20,000 operating hours under nominal rated torque — equivalent to approximately 10 years of normal farm use.

Seals

FKM (fluoroelastomer) radial shaft seals are used at all rotating shaft exits. FKM outperforms standard NBR (nitrile) rubber at elevated temperatures and resists degradation from synthetic gear oils, a critical advantage in hot climates such as Colombia's tropical lowland farming regions, where summer ambient temperatures regularly exceed 35°C.

Vertical TMR Feed Mixer Wagons

Total Mixed Ration (TMR) wagons use vertical auger screws to chop, blend, and discharge a precise mixture of forage, silage, concentrates, and supplements. The EP-EG drives the auger at the low output speeds (typically 30–80 RPM) required for thorough mixing while handling the high starting torques caused by compacted feed loads. It is compatible with both tractor PTO-driven and electric-motor-driven TMR mixer wagons used widely in the Antioquia and Cundinamarca departments of Colombia.

Stationary Feed Mixing Plants

Large dairy and beef cattle operations in Colombia often operate stationary mixing towers or batch feed mixing stations where a single high-torque gearbox drives a permanently installed vertical auger. The EP-EG Feed Mixer Planetary Gearbox's flange-mount configuration and hollow-shaft output option allow direct integration with the auger tube, eliminating intermediate couplings and reducing the total drive-train length — a valuable benefit in space-constrained machine-room installations.

Horizontal Ribbon & Paddle Mixers

Although the EP-EG Feed Mixer Planetary Gearbox is optimized for vertical drive configurations, its modular design supports horizontal base-mounted variants for use in ribbon blenders and paddle-type mixing units commonly found in premix feed manufacturing, aquaculture feed preparation, and pet food processing — industries growing rapidly across Latin America, including Colombia's expanding aquaculture sector in the Llanos Orientales region.

Poultry & Pig Farm Feed Systems

Beyond cattle, the EP-EG Series Feed Mixer Planetary Gearbox is widely selected for mechanized feed preparation lines on poultry and swine farms, where accurate, consistent feed blending directly impacts animal growth rates and feed conversion ratios. The gearbox handles the high cyclic loads of hammer-mill-to-mixer transfer conveyors and auger-based batch dosing systems, providing the reliability that modern intensive livestock operations demand in Colombia's poultry-producing regions around Santander and Valle del Cauca.

Replacement & Retrofit for Existing Feed Mixers

Many farms and feed equipment distributors in Medellín, Bogotá, and Cali are sourcing a reliable replacement planetary gearbox for feed mixer wagons where the original factory gearbox has worn out. The EP-EG Feed Mixer Planetary Gearbox's multi-option output shaft program and adjustable mounting flange dimensions make it straightforward to adapt to existing mixer frames and auger shaft connections — reducing machine downtime and avoiding the cost of an entirely new mixer purchase.

PTO Shaft

Drive Motor