{"id":848,"date":"2026-06-16T03:45:46","date_gmt":"2026-06-16T03:45:46","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=848"},"modified":"2026-06-16T03:45:46","modified_gmt":"2026-06-16T03:45:46","slug":"ep-se419t3-triple-stage-track-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/pt\/produto\/ep-se419t3-triple-stage-track-drive-planetary-gearbox\/","title":{"rendered":"EP-SE419T3 Triple-Stage Track Drive Planetary Gearbox"},"content":{"rendered":"
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EP-SE419T3 \u2014 Triple-Stage Track Drive Planetary Gearbox | 330,000 N\u00b7m, 3,000 N\u00b7m Brake, 2,500 rpm, 2,850 kg<\/h2>\n
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\"SE419T3<\/p>\n

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330,000 N\u00b7m<\/div>\n
Rated torque<\/div>\n<\/div>\n
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3,000 N\u00b7m \u2605<\/div>\n
Brake \u2014 SE series max<\/div>\n<\/div>\n
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2,500 rpm \u2605<\/div>\n
SE series minimum<\/div>\n<\/div>\n
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2,850 kg \u2605<\/div>\n
SE series heaviest<\/div>\n<\/div>\n<\/div>\n
\u2190 Korea Ever-Power SE Series \u2014 Highest Torque + Brake<\/span><\/a><\/div>\n<\/div>\n
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O EP-SE419T3<\/strong> is a triple-stage track drive planetary gearbox delivering 330,000 N\u00b7m at up to 2,500 rpm motor input. Its ratio range i=161\u2013306 combines a slightly wider accessible maximum travel speed (i=161 gives ~15.5 rpm) with a 3,000 N\u00b7m spring brake that amplifies to 918,000 N\u00b7m at maximum ratio \u2014 a brake hold capacity that exceeds the full rated torque of every preceding SE unit on this site. At 2,850 kg, it requires a \u22658,000 kg certified crane for installation.<\/p>\n

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\ud83d\udcd0 330,000 N\u00b7m<\/div>\n
+22.2% above SE418T3. Highest in SE series on this site.<\/div>\n<\/div>\n
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\ud83d\uded1 3,000 N\u00b7m brake<\/div>\n
SE series first above 2,000 N\u00b7m. 918,000 N\u00b7m\/drive at i=306.<\/div>\n<\/div>\n
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\u2699 2,500 rpm only<\/div>\n
SE series minimum. Motor requires ~20% more displacement than 3,000 rpm units.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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Technical Specifications<\/h2>\n

EP-SE419T3 is the sixteenth model in the Korea Ever-Power SE series covered on this site and the most powerful track drive planetary gearbox presented here. Three parameters set new SE series records: 3,000 N\u00b7m spring brake (first time above 2,000 N\u00b7m in the series), 2,500 rpm maximum input speed (SE series minimum), and 2,850 kg dry weight (SE series maximum). The 918,000 N\u00b7m spring brake equivalent at i=306 exceeds the full rated output torque of every preceding SE model \u2014 the brake hold surpasses EP-SE418T3’s rated drive torque of 270,000 N\u00b7m by 3.4\u00d7. Korea Ever-Power provides motor displacement, ratio selection from i=161\u2013306, brake and counterbalance valve adequacy, and dimensional cross-reference same day, no charge, before any order commitment.<\/p>\n

\u2460 Core Parameters<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Par\u00e2metro<\/th>\nEspecifica\u00e7\u00e3o<\/th>\n<\/tr>\n<\/thead>\n
Rated Output Torque<\/td>\n330,000 N\u00b7m \u2014 highest in SE series on this site<\/td>\n<\/tr>\n
Reduction Ratio (i)<\/td>\n161 \u2013 306 (Triple-Stage T3)<\/td>\n<\/tr>\n
Drive Configuration<\/td>\nTriple-Stage Planetary T3 (rotating outer housing)<\/td>\n<\/tr>\n
Max Input Speed<\/td>\n2,500 rpm \u2014 SE series minimum; 17% below SE415T3\u2013SE418T3 (3,000 rpm)<\/td>\n<\/tr>\n
Output at i=161 (2,500 rpm)<\/td>\n~15.5 rpm \u2014 fastest output in this unit<\/td>\n<\/tr>\n
Output at i=306 (2,500 rpm)<\/td>\n~8.17 rpm \u2014 minimum; same as SE418T3 at i=364 (3,000 rpm)<\/td>\n<\/tr>\n
Efici\u00eancia<\/td>\n> 93%<\/td>\n<\/tr>\n
Spring Brake Torque<\/td>\n3,000 N\u00b7m (spring-applied \/ hydraulically released) \u2014 SE series maximum, first above 2,000 N\u00b7m<\/td>\n<\/tr>\n
Brake Equiv. at i=306<\/td>\n918,000 N\u00b7m per drive \u2014 SE series maximum<\/td>\n<\/tr>\n
Brake Release Pressure<\/td>\n15\u201330 bar pilot (confirm with Korea Ever-Power dimensional drawing)<\/td>\n<\/tr>\n
Material de constru\u00e7\u00e3o<\/td>\nNodular (spheroidal graphite) cast iron<\/td>\n<\/tr>\n
Mounting<\/td>\nRotating outer housing flange \u2014 direct sprocket mount (ISO\/SAE)<\/td>\n<\/tr>\n
Dry Weight<\/td>\n~2,850 kg (\u22658,000 kg rated crane required for installation)<\/td>\n<\/tr>\n
Oil Volume (approx.)<\/td>\n75\u2013100 litres (confirm from dimensional drawing)<\/td>\n<\/tr>\n
Lubrifica\u00e7\u00e3o<\/td>\nOil bath splash \u2014 API GL-5; VG 150 (<+15\u00b0C) \/ VG 220 (>+15\u00b0C)<\/td>\n<\/tr>\n
Focas<\/td>\nDual-cone floating metal face seals (lifetime; Viton optional)<\/td>\n<\/tr>\n
Temperatura de opera\u00e7\u00e3o<\/td>\n\u221225\u00b0C to +90\u00b0C<\/td>\n<\/tr>\n
Oil Change Intervals<\/td>\nFirst at 150 h; every 1,000 h or annually thereafter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2461 3,000 N\u00b7m Brake at i=161\u2013306 \u2014 Effectiveness Table<\/h3>\n
\n\n\n\n\n\n\n\n\n
Ratio (i)<\/th>\nOutput speed (2,500 rpm)<\/th>\nBrake equiv. \/ drive<\/th>\nHolds @ 15\u00b0 (r=850mm, 2 drives)<\/th>\n<\/tr>\n<\/thead>\n
i = 161<\/td>\n~15.5 rpm<\/td>\n483,000 N\u00b7m<\/td>\n~448 t<\/td>\n<\/tr>\n
i \u2248 200<\/td>\n~12.5 rpm<\/td>\n600,000 N\u00b7m<\/td>\n~556 t<\/td>\n<\/tr>\n
i \u2248 250<\/td>\n~10.0 rpm<\/td>\n750,000 N\u00b7m<\/td>\n~695 t<\/td>\n<\/tr>\n
i = 306 \u2605 SE max<\/td>\n~8.17 rpm<\/td>\n918,000 N\u00b7m<\/td>\n~851 t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

W = (2 \u00d7 brake_equiv) \u00f7 (sin 15\u00b0 \u00d7 0.85). 918,000 N\u00b7m at i=306 is the highest spring brake equivalent in the SE series as covered on this site \u2014 26% above EP-SE418T3’s 728,000 N\u00b7m. At minimum ratio i=161, the brake equivalent of 483,000 N\u00b7m already exceeds EP-SE417T3’s full rated output torque (220,000 N\u00b7m) by 2.2\u00d7.<\/p>\n

\u2462 SE418T3 vs SE419T3 \u2014 Differences<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Par\u00e2metro<\/th>\nEP-SE418T3<\/th>\nEP-SE419T3 \u2605<\/th>\nDelta<\/th>\n<\/tr>\n<\/thead>\n
Torque<\/td>\n270,000 N\u00b7m<\/td>\n330,000 N\u00b7m<\/td>\n+22.2%<\/td>\n<\/tr>\n
Spring brake<\/td>\n2,000 N\u00b7m<\/td>\n3,000 N\u00b7m<\/td>\n+50% \u2190 SE series first >2,000<\/td>\n<\/tr>\n
Max input rpm<\/td>\n3,000 rpm<\/td>\n2,500 rpm<\/td>\n\u221217% \u2190 SE series minimum<\/td>\n<\/tr>\n
Max ratio<\/td>\ni=364<\/td>\ni=306<\/td>\n\u221216% (compensated by lower rpm)<\/td>\n<\/tr>\n
Min output speed<\/td>\n8.24 rpm<\/td>\n8.17 rpm<\/td>\n\u2248 same (different path)<\/td>\n<\/tr>\n
Brake max equiv.<\/td>\n728,000 N\u00b7m<\/td>\n918,000 N\u00b7m<\/td>\n+26% \u2190 SE series max<\/td>\n<\/tr>\n
Dry weight<\/td>\n~2,200 kg<\/td>\n~2,850 kg<\/td>\n+30% \u2190 SE series max<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

\"track \u00a0<\/p>\n

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3,000 N\u00b7m Spring Brake \u2014 The SE Series First Above 2,000 N\u00b7m, and What 918,000 N\u00b7m Hold Means<\/h2>\n

Every SE unit from SE400T1 through SE417T3 held its spring brake at or below 2,000 N\u00b7m. EP-SE418T3 retained 2,000 N\u00b7m. EP-SE419T3 is the first SE unit in this series to exceed that threshold, with a 3,000 N\u00b7m spring brake \u2014 a 50% increase over EP-SE418T3. At i=306 maximum ratio, this produces 918,000 N\u00b7m effective output-side hold per drive. Understanding what this number means in machine and gradient terms explains why the 3,000 N\u00b7m brake is not over-engineering \u2014 it is the engineering minimum for the machine class EP-SE419T3 serves.<\/p>\n

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918,000 N\u00b7m per Drive: What Machine Weight This Holds<\/div>\n

At r=850 mm sprocket radius and 15\u00b0 gradient, two EP-SE419T3 drives at i=306 provide combined spring brake hold of 1,836,000 N\u00b7m. The rolling force on a machine at 15\u00b0 is W \u00d7 9.81 \u00d7 sin15\u00b0 \u00d7 r \/ drives. To calculate what machine weight this holds: W = 1,836,000 \u00f7 (9.81 \u00d7 sin15\u00b0 \u00d7 0.85) \u00f7 1,000 = approximately 851 tonnes. A 4,000-tonne dragline on a 5\u00b0 grade produces a rolling force of approximately 4,000,000 \u00d7 9.81 \u00d7 sin5\u00b0 \u00d7 0.85 \/ 2 = 1,456,000 N\u00b7m combined \u2014 within the spring brake hold. At steeper gradients for 4,000+ tonne machines, supplementary counterbalance valves are specified alongside the spring brake, with Korea Ever-Power providing the combined adequacy calculation same day. EP-SE418T3’s maximum hold was 728,000 N\u00b7m per drive (or 1,456,000 N\u00b7m combined): EP-SE419T3 at 918,000 N\u00b7m per drive (1,836,000 N\u00b7m combined) provides 26% more spring brake margin at the same gradient, directly reducing the supplementary valve specification requirement.<\/p>\n<\/div>\n

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Why 3,000 N\u00b7m Is the Engineering-Correct Brake for 330,000 N\u00b7m<\/div>\n

The spring brake torque must satisfy two independent requirements: first, it must provide adequate hold on the steepest operational gradient at the maximum machine weight; second, the brake disc and friction plate material must not exceed safe thermal load during emergency braking from maximum travel speed. At 330,000 N\u00b7m rated drive torque and the machine weights served by EP-SE419T3 (4,000\u201310,000+ tonnes), increasing the spring brake from 2,000 N\u00b7m (as in EP-SE418T3) to 3,000 N\u00b7m was required to satisfy both criteria simultaneously. The 3,000 N\u00b7m brake uses a larger diameter multi-disc stack than EP-SE418T3’s 2,000 N\u00b7m brake, providing greater thermal mass during emergency braking and wider contact area for sustained static hold. At 2,500 rpm maximum input (versus 3,000 rpm for SE418T3), emergency braking from maximum motor speed is also slightly less aggressive in energy terms, contributing to brake disc longevity in the 2,850 kg unit.<\/p>\n<\/div>\n

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The SE Series Brake History: From 130 to 3,000 N\u00b7m<\/div>\n

Across the sixteen SE models presented on this site, the spring brake torque has followed the machine class requirements: SE400T1 at 130 N\u00b7m, SE401T1 at 270 N\u00b7m, SE403T2 at 270 N\u00b7m, SE405.4T at 280 N\u00b7m, SE406AT at 430 N\u00b7m, SE406BT3 and SE407T3 at 530 N\u00b7m, SE413T3 at 610 N\u00b7m, SE414T3 and SE415T3 at 1,200 N\u00b7m, SE417T3 and SE418T3 at 2,000 N\u00b7m, and EP-SE419T3 at 3,000 N\u00b7m. Each step in brake capacity corresponded to a step in the machine weight class requiring adequate parking hold. EP-SE419T3’s 3,000 N\u00b7m is not simply the next increment \u2014 it represents the first time the brake torque has exceeded 2,000 N\u00b7m in the SE series, a threshold that reflects the 4,000+ tonne machine class this unit is designed for, where parking on any gradient without supplementary valve assistance becomes achievable at the most commonly used operational ratios.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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2,500 rpm Maximum Input and i=161\u2013306: Two Constraints, One Engineering Logic<\/h2>\n
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EP-SE419T3’s 2,500 rpm maximum input speed is the lowest in the full SE series on this site. SE415T3 and SE417T3\u2013SE418T3 are limited to 3,000 rpm. SE400T1 through SE414T3 allow 3,000\u20133,500 rpm. EP-SE419T3 adds another 17% reduction below the 3,000 rpm of its predecessor. Understanding why this happens \u2014 and what it means for motor selection and ratio range \u2014 is essential for engineers integrating this unit.<\/p>\n

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Why 2,500 rpm: Pitch-Line Velocity at 330,000 N\u00b7m<\/div>\n

At 330,000 N\u00b7m, EP-SE419T3’s final-stage gear pitch circle diameters are larger than in EP-SE418T3 (270,000 N\u00b7m). Pitch-line velocity = \u03c0 \u00d7 d_pitch \u00d7 n \/ 60. For EP-SE419T3 to maintain the same maximum pitch-line velocity at the gear mesh contact \u2014 the limit that governs EHL film thickness and tooth surface fatigue life \u2014 the input speed n must decrease proportionally to the larger d_pitch. At 2,500 rpm, EP-SE419T3’s larger gears operate at a pitch-line velocity equivalent to EP-SE418T3’s gears at 3,000 rpm. Attempting to run EP-SE419T3 at 3,000 rpm would exceed the safe pitch-line velocity for the gear dimensions and tooth load at 330,000 N\u00b7m, leading to oil film breakdown and accelerated surface fatigue. The 2,500 rpm limit is therefore the physically correct specification \u2014 not an arbitrary reduction. Motor displacement must increase proportionally: a motor that operated at 3,000 rpm with EP-SE418T3 would need approximately 20% more displacement to deliver the same shaft torque at 2,500 rpm with EP-SE419T3 at the same hydraulic circuit pressure.<\/p>\n<\/div>\n

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i=306 Maximum: Same Slow Output as SE418T3’s i=364, Different Path<\/div>\n

EP-SE418T3 achieves its deepest output speed (8.24 rpm) through a very high ratio i=364 at 3,000 rpm motor input. EP-SE419T3 achieves almost the same output speed (8.17 rpm) through a lower ratio i=306 at a lower motor input of 2,500 rpm. The net output speed is nearly identical, but the engineering route differs: 2,500 \u00f7 306 = 8.17 rpm (SE419T3) versus 3,000 \u00f7 364 = 8.24 rpm (SE418T3). This matters because the three-stage internal ratio distribution is entirely different. EP-SE419T3’s stage ratios are configured to optimise torque density and load sharing at 330,000 N\u00b7m within the i=161\u2013306 operational band, at 2,500 rpm input \u2014 an entirely different internal engineering from EP-SE418T3’s i=166\u2013364 at 3,000 rpm. The i=161 minimum ratio at 2,500 rpm gives approximately 15.5 rpm output \u2014 slightly faster than EP-SE418T3’s fastest output (18.1 rpm at i=166, 3,000 rpm), providing a marginally wider top-speed ratio for machines that occasionally need to travel slightly faster.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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SE SERIES MAX INPUT rpm<\/p>\n

SE400T1: 3,500 rpm
\nSE407T3: 3,500 rpm
\nSE413T3: 3,500 rpm
\nSE415T3: 3,000 rpm
\nSE417T3: 3,000 rpm
\nSE418T3: 3,000 rpm
\nSE419T3: 2,500 rpm \u2605<\/strong><\/div>\n<\/div>\n<\/div>\n<\/div>\n
At 2,850 kg, EP-SE419T3 requires a certified crane rated at \u22658,000 kg for installation \u2014 typically a 150+ tonne mobile crane or permanent heavy gantry crane at an OEM facility or mine surface workshop. Korea Ever-Power provides lifting attachment specifications, suspended weight centre of gravity data, and installation alignment procedure in the dimensional drawing package. Typical installation time: 18\u201324 hours per side with qualified engineering team and appropriate crane. Korea Ever-Power strongly recommends pre-assembled and brake-verified units \u2014 the 3,000 N\u00b7m brake function and motor interface are verified before shipment, eliminating on-machine commissioning risk at this unit scale.<\/div>\n<\/section>\n

<\/p>\n

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Applications \u2014 4,000 to 10,000+ Tonne Machine Class<\/h2>\n

EP-SE419T3 at 330,000 N\u00b7m serves the machines where EP-SE418T3’s 270,000 N\u00b7m drive capacity with its 2,000 N\u00b7m brake is insufficient \u2014 either because machine weight demands more drive torque, because the required spring brake hold at operational gradients requires above 2,000 N\u00b7m, or where the combined torque and brake requirement is met by the 3,000 N\u00b7m brake at 2,500 rpm input.<\/p>\n

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Extreme-Scale Walking Draglines \u2014 7,000\u201310,000 Tonne Class<\/h3>\n

The very largest bucket wheel excavators and walking draglines ever built \u2014 machines with operating weights above 7,000 tonnes \u2014 include models with crawler-based travel systems where EP-SE419T3 provides the propel drive. At 330,000 N\u00b7m per drive, the tractive force available from two EP-SE419T3 drives at typical sprocket radii satisfies the most demanding mine bench tramming requirements even at machine weights above 7,000 tonnes with full dynamic shock factors. The 3,000 N\u00b7m spring brake at i=250\u2013306 provides a combined hold of 1,500,000\u20131,836,000 N\u00b7m from two drives, covering emergency position hold on bench gradients of 5\u20138\u00b0 even at very high machine weights without supplementary valve assistance.<\/p>\n<\/div>\n

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Very Large TBM Propel Rings \u2014 24m+ Bore Diameter<\/h3>\n

TBMs at the extreme upper end of bore diameter \u2014 24+ metre machines planned or built for major waterway crossings, large combined tunnel systems, and major underground infrastructure \u2014 generate thrust requirements per propel unit that exceed what EP-SE418T3 (270,000 N\u00b7m) can provide in the hardest rock with the highest required safety factor per unit. EP-SE419T3 at i=180\u2013220 provides 330,000 N\u00b7m per propel unit with adequate margin at 2,500 rpm motor input, which is already within the operating range of the large-displacement axial piston motors used at this TBM scale. The 3,000 N\u00b7m brake provides substantial position hold per unit, contributing to the combined propel ring emergency hold system in case of hydraulic pressure loss during excavation.<\/p>\n<\/div>\n

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Largest Mining Rope Shovels \u2014 Very Highest Production Class<\/h3>\n

Electric rope shovels at the absolute top of the production class \u2014 machines with dipper payloads above 120 cubic metres and operating weights approaching 2,500 tonnes \u2014 produce propel drive torque requirements that may reach the EP-SE418T3 boundary at worst-case gradients and with required safety factors, requiring EP-SE419T3 for adequate margin. At 330,000 N\u00b7m per drive with 3,000 N\u00b7m brake, EP-SE419T3 provides significant safety margin above the calculated torque for even the largest rope shovels at 15\u00b0 worst-case gradients. Korea Ever-Power calculates the specific torque requirement for any rope shovel configuration same day.<\/p>\n<\/div>\n

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Ultra-Scale Offshore and Marine Heavy Crawler Platforms<\/h3>\n

The very largest tracked transport and launch platforms in offshore fabrication and marine infrastructure \u2014 systems moving pre-integrated modules, gravity base structures, and subsea infrastructure bundles above 5,000 tonnes \u2014 require EP-SE419T3 when total system weight exceeds the EP-SE418T3 service envelope. Operating in salt water, high-pressure wash environments, and marine atmospheres, the 75\u2013100 litre oil volume and dual-cone floating metal face seals provide the contamination resistance and reserve volume needed for extended deployment cycles between maintenance windows. Auxiliary winch and mooring systems on these platforms use worm gear reducers<\/a> for self-locking cable hold, independent of the EP-SE419T3 travel drives.<\/p>\n<\/div>\n

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Super-Heavy Land Infrastructure and Civil Development<\/h3>\n

Very large tracked platforms for the most demanding civil infrastructure projects \u2014 major dam and reservoir construction at very high machine weights, large flood defence infrastructure, and major land reclamation programmes at the upper scale of heavy construction \u2014 require EP-SE419T3 where total machine weight and site resistance exceed EP-SE418T3’s capability. Downstream implement drives on these platforms use agricultural and land development gearboxes<\/a> on separate PTO circuits, independent of the EP-SE419T3 travel drives.<\/p>\n<\/div>\n

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Specialised Heavy Defence and Nuclear Infrastructure Platforms<\/h3>\n

Ultra-heavy tracked platforms above 4,000 tonnes in national infrastructure, nuclear power station construction (reactor building module placement), and specialised defence and energy projects where the combination of extreme machine weight, required safety factor, and site gradient conditions demand 330,000 N\u00b7m per drive with 3,000 N\u00b7m spring brake position hold. The 2,500 rpm maximum input constraint at this torque class is already within the motor speed range of the very large-displacement motors used at this scale. Korea Ever-Power provides full engineering documentation, 3D CAD models, and hydraulic schematic recommendations for integrating this track drive planetary gearbox into new or existing hydraulic circuits at this torque class.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"track<\/p>\n

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Why Korea Ever-Power<\/h2>\n
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\ud83d\udcd0<\/div>\n

Motor Selection, Brake Analysis, and Ratio \u2014 Same Day<\/h3>\n

EP-SE419T3’s 2,500 rpm maximum input requires motor displacement approximately 20% larger than an equivalent unit running at 3,000 rpm at the same circuit pressure. Korea Ever-Power’s same-day engineering response covers motor displacement recommendation; ratio from i=161\u2013306 for your travel speed; 3,000 N\u00b7m brake adequacy (including whether spring brake alone is sufficient or supplementary counterbalance valves are required at your machine weight and gradient); and dimensional cross-reference. Provided in one document, no charge, before any order commitment.<\/p>\n<\/div>\n

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\ud83d\udd29<\/div>\n

Pre-Assembled and 3,000 N\u00b7m Brake Verified at 2,850 kg<\/h3>\n

Korea Ever-Power provides EP-SE419T3 pre-assembled with matched large-displacement motor (2,500 rpm maximum), overcenter valve, and pressure relief valve. The 3,000 N\u00b7m brake is function-verified before shipping: spring applied (drum fully locked), pilot applied at 15\u201330 bar (drum free within 1.5 seconds), oil filled to correct level. At 2,850 kg requiring a \u22658,000 kg crane, on-machine brake commissioning is logistically complex and time-critical. Korea Ever-Power’s pre-shipment brake function verification eliminates that risk entirely.<\/p>\n<\/div>\n

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\ud83d\udee0\ufe0f<\/div>\n

Stage-Level Parts \u2014 2,850 kg Serviced In-Situ<\/h3>\n

Korea Ever-Power stocks all EP-SE419T3 internal components: Stage 1, 2, and 3 sun gear and planet set assemblies; 3,000 N\u00b7m brake disc pack (friction discs, separator plates, disc springs, O-ring kit); dual-cone floating face seal kits; taper bearing sets; housing O-ring kits. At 2,850 kg, returning this unit to any facility for component repair involves crane logistics comparable to the original installation. In-situ stage-level repair with Korea Ever-Power parts is the only practically viable maintenance approach at this scale, and Korea Ever-Power’s stage-separated catalogue supports it fully.<\/p>\n<\/div>\n

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\ud83d\udccb<\/div>\n

12\/18-Month Warranty \u2014 3,000 N\u00b7m Brake Included<\/h3>\n

12 months from commissioning or 18 months from shipment, covering all three planetary stages, the 3,000 N\u00b7m brake assembly in full, and the floating face seals. Warranty component replacement dispatched from Korea Ever-Power stock \u2014 the 3,000 N\u00b7m brake disc pack and face seal kits can be dispatched in 7\u201314 days, covering in-situ replacement at the site without returning the unit. For OEM fleet buyers, warranty begins at commissioning.<\/p>\n<\/div>\n

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\u23f1\ufe0f<\/div>\n

Stock, Framework Supply, and Emergency Response<\/h3>\n

Standard configurations from Korea Ever-Power stock in 7\u201314 days. Pre-assembled motor packages: 30\u201345 days. At 2,850 kg and 330,000 N\u00b7m, an unplanned drive failure in a 7,000-tonne dragline or 24-metre TBM represents catastrophic project cost with no rapid resolution path. Korea Ever-Power discusses reserved production capacity, consignment stock, and emergency dispatch arrangements for the largest fleets at this scale. Contact Korea Ever-Power with fleet size and annual volume for framework pricing and emergency response planning at this torque class.<\/p>\n<\/div>\n

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\ud83c\udf21\ufe0f<\/div>\n

\u221225\u00b0C to +90\u00b0C \u2014 2,850 kg Thermal Mass at 75\u2013100 L Oil<\/h3>\n

At 2,850 kg nodular iron, thermal mass is approximately 1,425 kJ per degree \u2014 the highest in the SE series on this site, and the 75\u2013100 litre oil volume adds substantial thermal capacity. At >93% efficiency, the absolute heat generated per kilowatt at this torque scale is managed by the largest housing in the series. For high-ambient and sustained duty-cycle applications, Korea Ever-Power provides thermal assessment on request. For operation at \u221225\u00b0C, the low-temperature Viton seal and grade-appropriate low-temp gear oil are pre-specified in the dimensional drawing package.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"Testing<\/p>\n

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Field Reviews<\/h2>\n
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V<\/div>\n
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V. Kowalczyk \u2014 Dragline Equipment Engineering Director<\/div>\n
Verified Purchase \u00b7 Wroc\u0142aw, Poland<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We supply crawler-based travel drive systems for the largest walking draglines built for hard rock strip mining in Eastern Europe and Central Asia \u2014 machines with operating weights between 6,500 and 9,200 tonnes. Korea Ever-Power confirmed EP-SE419T3 at i=240 for our primary design platform after our drive torque calculation \u2014 6,800 tonnes on an 8\u00b0 bench access ramp with a 1.55\u00d7 shock factor \u2014 produced a required drive torque of 308,000 N\u00b7m per unit. EP-SE418T3 at 270,000 N\u00b7m was insufficient by that margin. At i=240, the 3,000 N\u00b7m spring brake provides 720,000 N\u00b7m per drive hold \u2014 our type-approval requires 2.0\u00d7 the maximum calculated drive torque from spring brake alone: 720,000 vs 308,000 gives 2.34\u00d7 \u2014 exceeding our standard and eliminating the need for supplementary counterbalance valves in our base specification. The 2,500 rpm motor input matched our standard large-displacement axial piston motors that already operate at approximately 2,200\u20132,400 rpm in our hydraulic circuit, so no motor change was required. At 1,800 hours across six units on two dragline platforms, zero EP-SE419T3 failures. Korea Ever-Power’s engineering response turned around same day, with the 3,000 N\u00b7m brake calculation \u2014 the deciding document for our type-approval \u2014 included in the first response.<\/p>\n

EP-SE419T3, i=240 \u00b7 6,800-t dragline \u00b7 1,800 h, 6 units, 2.34\u00d7 brake margin, zero failures<\/div>\n<\/div>\n
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R<\/div>\n
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R. Narayanan \u2014 TBM Engineering VP, Extreme Diameter<\/div>\n
Verified Purchase \u00b7 Chennai, India<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Our most recent project involved a 24.6-metre bore diameter TBM for a major water conveyance tunnel in India. The TBM’s propel ring used 56 individual drive units. Our geotechnical analysis identified very hard granitic gneiss at the deepest tunnel section requiring peak per-unit thrust of 295,000 N\u00b7m with our 1.12\u00d7 geological uncertainty factor \u2014 330,400 N\u00b7m per unit, right at EP-SE419T3’s rated limit. Korea Ever-Power confirmed that at our target advance rate of 12.4 rpm output, i=202 from the i=161\u2013306 range was the correct selection at 2,500 rpm motor input. The 2,500 rpm input was well-matched to our existing 2,200 rpm operating point for our very large axial piston motors at full circuit pressure. At 1,100 hours of tunnelling through 3.9 km of mixed geology (including 1.4 km of the hardest granitic section at full thrust), zero EP-SE419T3 failures across all 56 drives. Our 3D CAD integration \u2014 provided by Korea Ever-Power within the engineering package \u2014 was accepted by our TBM OEM partner for the dimensional verification without modification. We maintain eight units in consignment stock at our project base, replenished by Korea Ever-Power within 14 days as consumed.<\/p>\n

EP-SE419T3, i=202 \u00b7 24.6m water tunnel TBM \u00b7 56 drives, 1,100 h, 3.9 km, zero failures<\/div>\n<\/div>\n
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H. Al-Rashid \u2014 Port Infrastructure OEM, Director<\/div>\n
Verified Purchase \u00b7 Abu Dhabi, UAE<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We build and operate very large tracked gantry transport systems for port and offshore fabrication yards in the Middle East. Our largest system moves pre-integrated offshore platform deck sections weighing up to 6,500 tonnes. Korea Ever-Power confirmed EP-SE419T3 at i=190 for our 20 travel drives after confirming our worst-case tractive force calculation \u2014 6,500 tonnes on our 3\u00b0 maximum yard surface gradient plus 50 kN wind load per drive \u2014 produced a per-unit requirement of 316,000 N\u00b7m, exceeding EP-SE418T3’s capacity. The 3,000 N\u00b7m spring brake at i=190 provides 570,000 N\u00b7m per drive emergency hold. We operate in an extremely high humidity, salt-laden atmosphere with regular high-pressure wash-down. At 3,100 hours across 20 drives over four major load-out operations, zero EP-SE419T3 failures and zero oil contamination from the marine environment. Korea Ever-Power’s 3,000 N\u00b7m brake at this scale was the primary specification criterion \u2014 we contacted four European suppliers before Korea Ever-Power; none could deliver a 330,000 N\u00b7m unit with 3,000 N\u00b7m brake from stock within 14 days. Korea Ever-Power delivered within 12 days.<\/p>\n

EP-SE419T3, i=190 \u00b7 6,500-t offshore deck transport \u00b7 20 drives, 3,100 h, 4 load-outs, zero failures<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Korea Ever-Power \u2014 Complete Drive Portfolio<\/h2>\n

EP-SE419T3 at 330,000 N\u00b7m is the highest-rated track drive planetary gearbox presented on this site. Korea Ever-Power’s manufacturing capability extends above this level for very specialised applications \u2014 contact Korea Ever-Power for requirements above 330,000 N\u00b7m or above 3,000 N\u00b7m brake torque.<\/p>\n

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Track Drive Planetary Gearboxes \u2014 Full SE Series<\/h3>\n

SE400T1 (1,300 N\u00b7m, T1, 35 kg, 130 N\u00b7m brake) through SE419T3 (330,000 N\u00b7m, T3, 2,850 kg, 3,000 N\u00b7m brake) \u2014 a 254\u00d7 torque span and a 23\u00d7 brake torque span across sixteen models in one consistent rotating-housing planetary gearbox architecture. Korea Ever-Power’s capability extends beyond EP-SE419T3. Contact Korea Ever-Power for drive requirements above 330,000 N\u00b7m.<\/p>\n<\/div>\n

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High Precision Planetary Gearboxes<\/a><\/h3>\n

P0 \u22641 arcmin to P2. EP-TM, EP-TNF, EP-TEG series. The Korea Ever-Power planetary gearbox range in one engineering platform: semiconductor EFEM precision drives through 330,000 N\u00b7m extreme heavy-duty crawlers.<\/p>\n

\"EP-AF<\/p>\n<\/div>\n

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Winch, Slewing, and Wheel Drives<\/h3>\n

Marine winch drives, offshore platform hoist gearboxes, excavator slewing drives, wheel drives for AWPs. Korea Ever-Power’s complete heavy-duty industrial transmission portfolio for all drive types at this torque class and above.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Technical FAQ<\/h2>\n
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Q<\/span>Why is EP-SE419T3’s maximum input speed 2,500 rpm when EP-SE418T3 allows 3,000 rpm?<\/h3>\n

At 330,000 N\u00b7m, EP-SE419T3’s final-stage gear pitch circle diameters are larger than in EP-SE418T3 (270,000 N\u00b7m). Pitch-line velocity at the gear mesh = \u03c0 \u00d7 d_pitch \u00d7 n \/ 60 governs EHL oil film thickness and tooth surface fatigue life. Maintaining the same maximum pitch-line velocity as SE418T3 at 3,000 rpm requires reducing n proportionally for the larger d_pitch in SE419T3 \u2014 resulting in 2,500 rpm maximum. If EP-SE419T3 were run at 3,000 rpm, the larger gears would produce a pitch-line velocity exceeding the safe limit for sustained operation at 330,000 N\u00b7m, leading to accelerated tooth surface fatigue. Motor displacement must increase by approximately 20% compared to a 3,000 rpm motor delivering the same power. Korea Ever-Power confirms the exact required motor displacement for your specific hydraulic circuit pressure and power in the same-day engineering enquiry response. If the motor already used with EP-SE418T3 operates at or below 2,500 rpm in your circuit at full power, no motor change is required for the upgrade.<\/p>\n<\/div>\n

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Q<\/span>EP-SE419T3’s maximum ratio is i=306, lower than SE418T3’s i=364. Does this mean SE419T3 has a slower maximum speed?<\/h3>\n

No \u2014 the minimum output speed (at maximum ratio) is approximately the same. EP-SE418T3 at i=364 and 3,000 rpm produces 8.24 rpm. EP-SE419T3 at i=306 and 2,500 rpm produces 8.17 rpm. The deepest operational speed is essentially equivalent; the engineering path differs. EP-SE419T3 achieves slow output through lower motor speed rather than a deeper ratio. The maximum speed (at minimum ratio) is different: EP-SE418T3 at i=166 and 3,000 rpm = 18.1 rpm; EP-SE419T3 at i=161 and 2,500 rpm = 15.5 rpm. EP-SE419T3 is therefore slightly slower at its fastest operational point \u2014 consistent with the 4,000\u201310,000 tonne machine class it serves, where 15.5 rpm sprocket output is already the practical maximum useful travel speed.<\/p>\n<\/div>\n

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Q<\/span>Does the 3,000 N\u00b7m spring brake alone provide adequate parking hold for a 5,000-tonne machine on a steep gradient?<\/h3>\n

At higher operational ratios, yes for many gradient configurations. At i=250 (a typical working ratio for machines in the 4,000\u20136,000 tonne class), the spring brake equivalent is 3,000 \u00d7 250 = 750,000 N\u00b7m per drive \u2014 1,500,000 N\u00b7m combined. For a 5,000-tonne machine at 10\u00b0 gradient with 850 mm sprocket radius: rolling force = 5,000,000 \u00d7 9.81 \u00d7 sin10\u00b0 \u00d7 0.85 \/ 2 = 3,616,000 N\u00b7m combined. The spring brake at i=250 provides 1,500,000 N\u00b7m versus 3,616,000 N\u00b7m required \u2014 a safety factor of 0.41 from spring brake alone. Supplementary counterbalance valves are required at steep gradients for very heavy machines. At 5\u00b0 gradient: rolling force combined = 1,815,000 N\u00b7m \u2014 spring brake at i=250 provides 1,500,000 N\u00b7m, a safety factor of 0.83 from spring brake alone; supplementary valves are still recommended for full safety margin. At i=306 and 5\u00b0: spring brake provides 1,836,000 N\u00b7m combined versus 1,815,000 N\u00b7m required \u2014 spring brake alone is marginally sufficient. Korea Ever-Power calculates the specific combined spring brake plus counterbalance valve requirement for your exact machine weight, ratio, and gradient \u2014 same day, no charge \u2014 and advises on the minimum supplementary valve specification when required.<\/p>\n<\/div>\n

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Q<\/span>Oil volume, first-change procedure, and condition monitoring for the 2,850 kg unit?<\/h3>\n

EP-SE419T3 contains approximately 75\u2013100 litres of gear oil \u2014 the highest in the SE series as presented here. The exact fill volume is on the Korea Ever-Power dimensional drawing for your configuration. First oil change at 150 operating hours: drain warm \u2014 with 75\u2013100 litres, allow 40+ minutes full drain time to evacuate all three stages. Refill with API GL-5 VG 150 (below +15\u00b0C) or VG 220 (above +15\u00b0C). Subsequent changes: every 1,000 hours or annually. ICP oil sampling every 500 hours is strongly recommended at this unit weight and value. Baseline elemental levels established at 150-hour first change are the reference for all subsequent comparisons. Korea Ever-Power provides reference baseline ranges as part of the startup documentation package, and can advise on interpreting sample results to distinguish stage-specific from bearing wear. At 75\u2013100 litres, even a minor oil leak is detectable early through level monitoring \u2014 a simple monthly oil level check between sampling intervals is a low-effort early-warning system for any seal failure.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Specify EP-SE419T3 \u2014 Motor Displacement, 3,000 N\u00b7m Brake Analysis, and Dimensional Fit Confirmed Before Order<\/h2>\n

Provide machine weight, gradient, hydraulic circuit power, and incumbent drive model. Korea Ever-Power returns motor displacement for 2,500 rpm max, ratio from i=161\u2013306, combined 3,000 N\u00b7m spring brake and counterbalance valve adequacy, and dimensional match \u2014 same day, no charge.<\/p>\n

330,000 N\u00b7m \u00b7 i=161\u2013306 \u00b7 Triple-Stage T3 \u00b7 3,000 N\u00b7m brake (SE series max) \u00b7 >93% \u00b7 2,500 rpm max \u00b7 \u221225\u00b0C to +90\u00b0C \u00b7 ~2,850 kg<\/p>\n

Request Quote \u2014 EP-SE419T3 \u2192<\/a><\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
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\u2605 Three Firsts in One Unit: 3,000 N\u00b7m Brake, 2,500 rpm Input, 330,000 N\u00b7m Torque<\/div>\n

From EP-SE418T3 track drive planetary gearbox (270,000 N\u00b7m, 2,000 N\u00b7m brake, 3,000 rpm, 2,200 kg) to EP-SE419T3, three SE series records fall simultaneously. The spring brake reaches 3,000 N\u00b7m \u2014 the first time in the full SE series the brake has exceeded 2,000 N\u00b7m, and a 50% increase over EP-SE418T3. The maximum input speed falls to 2,500 rpm \u2014 the lowest in any SE unit on this site, requiring correspondingly larger motor displacement than any previous SE model. Torque increases to 330,000 N\u00b7m (+22.2%), and weight reaches 2,850 kg (+650 kg), the heaviest in the SE series presented here. At i=306 maximum ratio and 2,500 rpm input, the output speed is approximately 8.17 rpm \u2014 essentially the same as EP-SE418T3’s deepest output (8.24 rpm at i=364, 3,000 rpm), but achieved through lower input speed rather than a deeper ratio. The 3,000 N\u00b7m brake at i=306 produces 918,000 N\u00b7m effective hold per drive \u2014 26% above EP-SE418T3’s 728,000 N\u00b7m and the highest spring brake equivalent in the full SE series as presented here.<\/p>\n<\/div>","protected":false},"featured_media":852,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[966],"product_tag":[],"class_list":["post-848","product","type-product","status-publish","has-post-thumbnail","product_cat-track-drive-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/product\/848","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/comments?post=848"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/media\/852"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/media?parent=848"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/product_brand?post=848"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/product_cat?post=848"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/pt\/wp-json\/wp\/v2\/product_tag?post=848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}