EP-300L Inline Planetary Gear Reducer 500kNm 540kW OEM Replacement 16 Sizes
EP-300L inline planetary gear reducer — 16 frame sizes from 1,000 to 500,000 Nm. Max 540 kW power, ratios up to 9,000:1. Direct OEM replacement for Bonfiglioli, Brevini, Rexroth. 100% load-tested, ISO 9001. MOQ 1. 24h quote.
EP-300L Inline Planetary Gear Reducer
What Is the EP-300L Inline Planetary Gear Reducer?
The EP-300L inline planetary gear reducer is a coaxial planetary drive unit where the input shaft (motor connection) and output shaft share the same centreline. The planetary architecture — sun gear driving multiple planet gears simultaneously within a fixed ring gear — distributes load across all planet gear meshes rather than a single contact point. This delivers substantially higher torque density per unit volume than conventional helical or worm gearboxes at the same output torque rating.
The series spans 16 frame sizes — EP300L through EP321L — covering 1,000 Nm to 500,000 Nm of rated output torque. A high-power version is also available within the same housing dimensions, combining the planetary gear efficiency advantage with higher-grade input components for applications running at the top of the rated power range (up to 540 kW). Each frame size is available with 1 to 4 planetary reduction stages, encoded as L1, L2, L3, or L4 in the model designation — the stage count determines the achievable gear ratio range without changing the housing.
The EP-300L series replaces inline variants from Bonfiglioli, Brevini, Bosch Rexroth, Comer Industries, Reggiana Riduttori, Rossi, and Zollern — with fully interchangeable mounting dimensions. The product is manufactured under ISO 9001:2015 certification and every unit is individually load-tested before shipment with a signed test certificate.
EP-300L Series — Frame Size & Torque Reference
Each frame offers 4 stage variants (L1–L4). Suffix digit = number of planetary reduction stages. Confirm your required torque and ratio — we calculate the correct stage count and return the exact model specification.
| Series | Model Variants (L1 · L2 · L3 · L4) | Rated Torque (Nm) |
|---|---|---|
| EP300L | EP300L1 · EP300L2 · EP300L3 · EP300L4 | 1,000 |
| EP301L | EP301L1 · EP301L2 · EP301L3 · EP301L4 | 1,750 |
| EP303L | EP303L1 · EP303L2 · EP303L3 · EP303L4 | 2,500 |
| EP305L | EP305L1 · EP305L2 · EP305L3 · EP305L4 | 5,000 |
| EP306L | EP306L1 · EP306L2 · EP306L3 · EP306L4 | 8,500 |
| EP307L | EP307L1 · EP307L2 · EP307L3 · EP307L4 | 12,500 |
| EP309L | EP309L1 · EP309L2 · EP309L3 · EP309L4 | 18,000 |
| EP310L | EP310L1 · EP310L2 · EP310L3 · EP310L4 | 25,000 |
| EP311L | EP311L1 · EP311L2 · EP311L3 · EP311L4 | 40,000 |
| EP313L | EP313L1 · EP313L2 · EP313L3 · EP313L4 | 55,000 |
| EP315L | EP315L1 · EP315L2 · EP315L3 · EP315L4 | 100,000 |
| EP316L | EP316L1 · EP316L2 · EP316L3 · EP316L4 | 135,000 |
| EP317L | EP317L1 · EP317L2 · EP317L3 · EP317L4 | 170,000 |
| EP318L | EP318L1 · EP318L2 · EP318L3 · EP318L4 | 250,000 |
| EP319L | EP319L1 · EP319L2 · EP319L3 · EP319L4 | 350,000 |
| EP321L | EP321L1 · EP321L2 · EP321L3 · EP321L4 | 500,000 |
Suffix guide: L1 = 1 stage (lower ratio range) · L4 = 4 stages (up to 9,000:1) · Same housing dimensions for all stages within each frame. Dimensional drawings supplied on request before order confirmation.
Technical Specifications — Full Series
Drop-In Replacement for 7 Major Brands
All EP-300L series mounting dimensions are fully interchangeable with equivalent inline planetary gear reducers from the following brands. Send your existing model code — we confirm the dimensional match within 4 hours.
We do not sell products from these brands; brand names are referenced for product selection convenience only and do not involve any infringement.
Key Features of the EP-300L Inline Planetary Gear Reducer
Planetary load distribution across multiple simultaneous gear meshes delivers significantly higher torque output per unit volume than helical or worm alternatives. At the same rated torque, an EP-300L unit is typically 30–50% smaller and lighter than a conventional parallel-shaft gearbox — reducing structural load and simplifying machine layout.
Planetary gear rolling contact delivers 96–98% efficiency per reduction stage versus 60–80% for worm designs at equivalent ratios. For a 15 kW drive running 4,000 hours/year, the energy saving over a worm gearbox is approximately $400–700/year at standard industrial electricity rates — reaching payback within the first year of operation.
The complete EP-300L range spans 16 frame sizes in one product family. Multi-machine fleet procurement is consolidated into a single supplier relationship — one product standard, one qualification process, one purchase order covering all torque classes across a plant or equipment fleet.
Flanged axial piston, orbit hydraulic, IEC, NEMA, and solid shaft — all standard, no custom engineering. The same frame serves mobile hydraulic equipment and fixed industrial electric motor drives. Specifying the input at order eliminates on-site adaptor fabrication cost and time.
The helical gear variant (high-power version) runs measurably quieter than spur configurations — relevant for food processing, packaging, and indoor automation where noise levels are a specification requirement. All variants are designed for 10,000-hour rated bearing life under continuous load, with oil change intervals at 1,000 hours.
Every unit undergoes a no-load run-in followed by a full rated-torque bench test before shipment. Signed test certificate ships with every unit — not batch-sampled. Required by ISO 9001 procurement auditors; supplied as standard at no extra charge.
Application Industries
The EP-300L inline planetary gear reducer at 1,000–500,000 Nm covers the complete range of industrial and mobile equipment drive applications.
Dryers · Crushing machines · Mixing mills · Tower cranes · Mobile scaffolds · Piling rigs
Gantry cranes · Mobile dock cranes · Bridge cranes · Movable stock drives
Rotating filters · Thickeners · Clarifiers · Worm hoists · Agitators
Drilling & excavation · Conveyors · Crushing machines · Selectors & classifiers
Pitch drives · Yaw drives · Auxiliary equipment for wind turbine towers
Conveyors · Extruders · Cutting machines · Roll benders · Rolling mills
Mixing machines · Mixers · Conveyors · Fruit extractor machines
Movable roofs · Movable gantries · Piling equipment · Retractable structures
Frequently Asked Questions
Verified Customer Reviews
"We spec EP-300L units across all 12 of our clarifier drives at a new water treatment plant — four different frame sizes in the same order. One supplier, one test certificate format, one dimensional drawing standard. The procurement audit sailed through because everything was consistent. All units installed within tolerance, zero rework."
"Replaced a Bonfiglioli 309L3 on our conveyor. Told my operations VP it was an 'equivalent unit at 33% lower cost with the same test certification.' He said 'make sure it works.' It has now worked for 1,900 hours. My VP has not mentioned it since. In this industry, no news is the highest possible praise. Five stars. Would procure again."
Inline Planetary Gear Reducer Factory
Frequently Ordered Together
The EP-300L is the torque conversion stage. These two products complete the drive system on either end.Besides inline planetary gearboxes, we also offer right-angle planetary gearboxes, Wheel Drive, and so on.
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System quote: Provide your torque, motor type (or SAE flange), required ratio, and brake holding torque — we quote the EP-300L gearbox and the matched input/output components as a confirmed drive assembly. Email [email protected].
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