{"id":847,"date":"2026-06-16T03:44:49","date_gmt":"2026-06-16T03:44:49","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=847"},"modified":"2026-06-16T03:44:49","modified_gmt":"2026-06-16T03:44:49","slug":"ep-se418t3-triple-stage-track-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/fr\/produit\/ep-se418t3-triple-stage-track-drive-planetary-gearbox\/","title":{"rendered":"EP-SE418T3 Triple-Stage Track Drive Planetary Gearbox"},"content":{"rendered":"
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EP-SE418T3 \u2014 Triple-Stage Track Drive Planetary Gearbox | 270,000 N\u00b7m, i=166\u2013364, >94%, 2,200 kg<\/h2>\n
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\"SE418T3<\/p>\n

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270,000 N\u00b7m<\/div>\n
Rated torque<\/div>\n<\/div>\n
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>94% \u2605<\/div>\n
Efficiency up at this scale<\/div>\n<\/div>\n
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i=166\u2013364<\/div>\n
Slow-only ratio range<\/div>\n<\/div>\n
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2,200 kg \u2605<\/div>\n
SE series heaviest<\/div>\n<\/div>\n<\/div>\n
\u2190 Korea Ever-Power SE Series \u2014 Ultimate Capacity<\/span><\/a><\/div>\n<\/div>\n
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Le EP-SE418T3<\/strong> is a triple-stage track drive planetary gearbox producing 270,000 N\u00b7m from a 3,000 rpm motor input across i=166\u2013364. Its ratio range starts at i=166 \u2014 reflecting the reality that the machines this unit serves never need to travel faster than approximately 0.85 km\/h at 3,000 rpm motor input. At 2,200 kg, installation requires a \u22655,000 kg rated crane.<\/p>\n

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\ud83d\udcd0 270,000 N\u00b7m<\/div>\n
+22.7% above SE417T3. Highest in SE series on this site.<\/div>\n<\/div>\n
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\u26a1 >94% \u2014 recovered<\/div>\n
Higher efficiency than the SE413T3\u2013SE417T3 range at >93%. Explained by pitch-line physics.<\/div>\n<\/div>\n
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\ud83c\udfd7 2,200 kg<\/div>\n
Heaviest SE unit. Requires \u22655,000 kg rated crane. 60\u201380 L oil volume.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Technical Specifications<\/h2>\n

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\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
Param\u00e8tre<\/th>\nSp\u00e9cification<\/th>\n<\/tr>\n<\/thead>\n
Rated Output Torque<\/td>\n270,000 N\u00b7m \u2014 highest in SE series on this site<\/td>\n<\/tr>\n
Reduction Ratio (i)<\/td>\n166 \u2013 364 (Triple-Stage T3)<\/td>\n<\/tr>\n
Drive Configuration<\/td>\nTriple-Stage Planetary T3 (rotating outer housing)<\/td>\n<\/tr>\n
Vitesse d'entr\u00e9e maximale<\/td>\n3,000 rpm<\/td>\n<\/tr>\n
Output Speed at i=166 (3,000 rpm)<\/td>\n~18.1 rpm \u2014 fastest output in this unit (~0.85 km\/h at r=800mm)<\/td>\n<\/tr>\n
Output Speed at i=364 (3,000 rpm)<\/td>\n~8.24 rpm \u2014 minimum output speed<\/td>\n<\/tr>\n
Efficacit\u00e9<\/td>\n> 94% \u2014 higher than EP-SE413T3 through SE417T3 (all at >93%)<\/td>\n<\/tr>\n
Spring Brake Torque<\/td>\n2,000 N\u00b7m (spring-applied \/ hydraulically released)<\/td>\n<\/tr>\n
Brake Output-Equiv. at i=364<\/td>\n728,000 N\u00b7m per drive<\/td>\n<\/tr>\n
Brake Release Pressure<\/td>\n15\u201330 bar pilot (confirm with Korea Ever-Power dimensional drawing)<\/td>\n<\/tr>\n
Housing Material<\/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~2,200 kg (\u22655,000 kg rated crane required for installation)<\/td>\n<\/tr>\n
Oil Volume (approx.)<\/td>\n60\u201380 litres (confirm exact from dimensional drawing)<\/td>\n<\/tr>\n
Lubrification<\/td>\nOil bath splash \u2014 API GL-5; VG 150 (<+15\u00b0C) \/ VG 220 (>+15\u00b0C)<\/td>\n<\/tr>\n
Scell\u00e9s<\/td>\nDual-cone floating metal face seals (lifetime; Viton optional)<\/td>\n<\/tr>\n
Temp\u00e9rature de fonctionnement<\/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 2,000 N\u00b7m Brake at i=166\u2013364 \u2014 Effectiveness Table<\/h3>\n
\n\n\n\n\n\n\n\n\n
Ratio (i)<\/th>\nOutput speed (3,000 rpm)<\/th>\nBrake equiv. \/ drive<\/th>\nHolds @ 15\u00b0 (r=800mm, 2 drives)<\/th>\n<\/tr>\n<\/thead>\n
i = 166<\/td>\n~18.1 rpm<\/td>\n332,000 N\u00b7m<\/td>\n~327 t<\/td>\n<\/tr>\n
i \u2248 230<\/td>\n~13.0 rpm<\/td>\n460,000 N\u00b7m<\/td>\n~453 t<\/td>\n<\/tr>\n
i \u2248 295<\/td>\n~10.2 rpm<\/td>\n590,000 N\u00b7m<\/td>\n~581 t<\/td>\n<\/tr>\n
i = 364 max<\/td>\n~8.24 rpm<\/td>\n728,000 N\u00b7m<\/td>\n~717 t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

W = (2 \u00d7 brake_equiv) \u00f7 (sin 15\u00b0 \u00d7 0.80). At i=166 (minimum ratio), the brake equivalent is already 332,000 N\u00b7m per drive \u2014 higher than EP-SE415T3’s maximum of 258,000 N\u00b7m. This confirms that even at EP-SE418T3’s fastest operating ratio, the spring brake hold exceeds the full capability of lighter SE units.<\/p>\n

\u2462 SE417T3 vs SE418T3 \u2014 Where the Differences Lie<\/h3>\n
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Param\u00e8tre<\/th>\nEP-SE417T3<\/th>\nEP-SE418T3 \u2605<\/th>\nDelta<\/th>\n<\/tr>\n<\/thead>\n
Couple<\/td>\n220,000 N\u00b7m<\/td>\n270,000 N\u00b7m<\/td>\n+22.7%<\/td>\n<\/tr>\n
Efficacit\u00e9<\/td>\n>93%<\/td>\n>94%<\/td>\n+1 pt \u2191 (unusual)<\/td>\n<\/tr>\n
Min ratio<\/td>\ni=123<\/td>\ni=166<\/td>\n+35% (slower max speed)<\/td>\n<\/tr>\n
Max ratio<\/td>\ni=365<\/td>\ni=364<\/td>\n\u2248 same<\/td>\n<\/tr>\n
Spring brake<\/td>\n2,000 N\u00b7m<\/td>\n2,000 N\u00b7m<\/td>\n\u2014<\/td>\n<\/tr>\n
Dry weight<\/td>\n~1,450 kg<\/td>\n~2,200 kg<\/td>\n+52% \u2190 SE series max<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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EP-SE418T3 is the fifteenth model in the Korea Ever-Power SE series covered on this site, the most powerful track drive planetary gearbox presented here, and the only unit in the series where efficiency increases from its predecessor \u2014 >94% versus SE413T3\u2013SE417T3\u2019s >93%. It is also the heaviest at 2,200 kg, the first requiring a \u22655,000 kg crane for installation, and the only SE unit on this site with a minimum ratio as high as i=166 \u2014 reflecting that the 3,000\u20137,000+ tonne machines it serves simply do not need faster travel than 18 rpm at the sprocket. The 207\u00d7 torque span from SE400T1 (1,300 N\u00b7m) to SE418T3 (270,000 N\u00b7m) represents fifteen models in a consistent rotating-housing planetary gearbox architecture. Korea Ever-Power provides motor displacement calculation, ratio selection, brake adequacy confirmation (including counterbalance valve requirements for very heavy machines), and dimensional cross-reference against the incumbent drive, all in a single same-day engineering response, at no charge, before any order commitment. The SE series extends beyond EP-SE418T3 for very specialised applications \u2014 contact Korea Ever-Power for requirements above 270,000 N\u00b7m.<\/p>\n<\/section>\n

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

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>94% Efficiency at the Highest Torque \u2014 Why Larger Gears Can Be More Efficient<\/h2>\n

In the SE series efficiency record from SE400T1 through SE415T3 and SE417T3, a pattern appears: as torque increased into the very large T3 class (SE413T3 through SE417T3), efficiency settled at >93% \u2014 slightly below the >94% of smaller T3 units like SE406BT3, SE407T3, and SE410T3. EP-SE418T3 breaks this pattern: at 270,000 N\u00b7m, efficiency recovers to >94%. Three independent physical mechanisms explain why this is not a specification error.<\/p>\n

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Mechanism 1: Lower Pitch-Line Velocity at the Gear Mesh<\/div>\n

Gear mesh efficiency in a planetary set is primarily governed by pitch-line velocity at the tooth contact. As pitch-line velocity increases, hydrodynamic friction in the elastohydrodynamic oil film (EHL film) at the gear contact increases non-linearly \u2014 and efficiency decreases. At 270,000 N\u00b7m, EP-SE418T3’s gear pitch circle diameters are larger than in EP-SE417T3’s 220,000 N\u00b7m final stage. At the same 3,000 rpm motor input, the larger final-stage gears rotate more slowly (lower angular speed), producing a lower pitch-line velocity at the tooth mesh. The reduced pitch-line velocity means reduced EHL film viscous shear losses, directly improving mesh efficiency above the level achievable in SE417T3’s smaller, faster-rotating gears.<\/p>\n<\/div>\n

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Mechanism 2: More Uniform Three-Stage Ratio Distribution<\/div>\n

EP-SE418T3’s ratio range begins at i=166, compared to i=123 for EP-SE417T3. A minimum ratio of i=166 means the three stages collectively reduce speed by 166-fold at minimum. This higher minimum ratio allows each of the three stages to be designed with a more uniform individual stage ratio \u2014 each stage reducing speed by approximately i^(1\/3) = 5.5\u00d7, versus the uneven distribution needed when the minimum ratio is only i=123 (where one stage must provide a small reduction to reach the i=123 end of the range). More uniform stage ratios eliminate the efficiency penalty from having one stage operating far outside its optimal reduction ratio, contributing to the overall efficiency improvement.<\/p>\n<\/div>\n

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Mechanism 3: Contact Ratio and Sliding Speed at the Mesh<\/div>\n

Larger gear modules (tooth size) increase the contact ratio \u2014 the fraction of time two teeth are in simultaneous contact. Higher contact ratio distributes the transmitted load across more tooth pairs simultaneously, reducing the load per tooth and the associated sliding speed at the tooth root and tip where friction is highest. At 270,000 N\u00b7m, EP-SE418T3’s final stage gear module is larger than in EP-SE417T3, producing a higher contact ratio and lower specific sliding velocity across the tooth profile. Combined with the lower pitch-line velocity from Mechanism 1, this produces measurably lower total mesh friction loss, returning the efficiency specification to the >94% level achievable at this scale.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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2,200 kg \u2014 The Scale Engineering of the SE Series Maximum<\/h2>\n
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EP-SE418T3 at 2,200 kg is the heaviest track drive unit in the Korea Ever-Power SE series covered on this site. The +750 kg increase over EP-SE417T3 (+52%) reflects four compounding engineering factors that scale non-linearly with torque at the 270,000 N\u00b7m level.<\/p>\n

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Gear Cross-Section Scaling: The Dominant Factor<\/div>\n

Gear tooth bending strength scales with the square of the tooth module (module^2 \u00d7 face width). To increase rated torque by 22.7% from 220,000 to 270,000 N\u00b7m at the final stage, the product of module^2 and face width must increase proportionally. If module increases (larger teeth), pitch circle diameter increases, housing diameter increases, and mass increases by roughly the cube of the linear dimension scale factor. This dimensional cascade means that a 22.7% torque increase requires a housing cross-section increase of approximately 7\u201310% in diameter, which at 2,200 kg of nodular cast iron produces a disproportionally large mass increase. This is the primary explanation for the +750 kg step, not an inefficiency in the design.<\/p>\n<\/div>\n

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Bearing Bore and Housing Wall Thickness<\/div>\n

The taper roller bearings at the drum-spindle interface must be sized for the bearing loads imposed by the machines this unit serves \u2014 3,000\u20137,000+ tonne platforms imposing 700\u20131,000+ kN combined radial and axial loads. At this load class, the bearing bore diameter must increase substantially above EP-SE417T3’s already-large bearings. Larger bore requires more housing material around the bore \u2014 thick walls in nodular cast iron for load path integrity. This bearing-driven housing enlargement adds several hundred kilograms independently of the gear set scaling.<\/p>\n<\/div>\n

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i=166 Stage Configuration and 60\u201380 Litre Oil Volume<\/div>\n

The minimum ratio i=166 (vs i=123 for EP-SE417T3) means the three stages are configured for a higher minimum ratio. This different stage configuration, combined with the larger gear cross-sections for 270,000 N\u00b7m, produces a different housing axial length and diameter distribution than SE417T3. The 60\u201380 litre oil volume estimate (versus approximately 40\u201355 litres for EP-SE417T3) reflects the larger sump volume inside the 2,200 kg housing, which contributes to the lubrication film quality that supports the >94% efficiency specification.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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SE SERIES WEIGHT AT PEAK<\/p>\n

SE400T1: 35 kg
\nSE407T3: 350 kg
\nSE410T3: 420 kg
\nSE413T3: 420 kg
\nSE414T3: 680 kg
\nSE415T3: 850 kg
\nSE417T3: 1,450 kg
\nSE418T3: 2,200 kg \u2605<\/strong><\/div>\n<\/div>\n<\/div>\n<\/div>\n
At 2,200 kg, EP-SE418T3 requires a certified crane rated at \u22655,000 kg \u2014 typically a 100+ tonne mobile crane or equivalent facility crane. This is substantially larger than the 50\u2013100 tonne crane required for EP-SE417T3 (1,450 kg). Korea Ever-Power provides lifting attachment specifications, outrigger placement recommendations, and installation alignment procedure in the dimensional drawing package supplied with each EP-SE418T3 unit. Typical installation time: 16\u201320 hours per side with appropriate equipment and a qualified team.<\/div>\n<\/section>\n

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Applications \u2014 3,000 to 7,000+ Tonne Machine Class<\/h2>\n

EP-SE418T3 at 270,000 N\u00b7m serves the absolute highest tier of crawler drive engineering \u2014 machines where even EP-SE417T3’s 220,000 N\u00b7m is insufficient, and where i=166 as the minimum ratio reflects that no machine at this weight class needs to travel faster than approximately 0.85 km\/h.<\/p>\n

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Very Large Walking Draglines \u2014 5,000\u20137,000+ Tonne Class<\/h3>\n

The world’s largest walking draglines \u2014 machines with bucket capacities of 100\u2013170 cubic metres and operating weights exceeding 5,000 tonnes \u2014 include models with crawler-type propulsion systems that require EP-SE418T3 for the travel propel drives. These machines move infrequently (typically every few weeks between panel moves) but generate enormous tractive force requirements on mine bench surfaces. At 270,000 N\u00b7m per drive with i=200\u2013280, EP-SE418T3 handles the required tractive force for these machines at their steepest operational gradients with adequate safety margin that EP-SE417T3 at 220,000 N\u00b7m cannot provide. The >94% efficiency is operationally significant at this scale: 1% efficiency improvement in a machine with multi-megawatt hydraulic propel power translates to tens of kilowatts less heat in each drive, reducing housing surface temperature and extending oil change intervals on machines with access-constrained maintenance. For a machine with 12 propel drives at full power, the difference between >93% and >94% efficiency per drive is roughly 10\u201315 kW less heat per drive \u2014 approximately 120\u2013180 kW less total propel system heat \u2014 measurable as lower main pump outlet temperatures and longer filter change intervals in the hydraulic system.<\/p>\n<\/div>\n

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TBM Main Drive Propel Rings \u2014 22m+ Bore Diameter<\/h3>\n

TBMs in the very largest bore diameter class \u2014 22\u201316 metre machines being used for the widest motorway tunnels, large waterway crossings, and major underground infrastructure projects \u2014 generate per-unit propel drive load requirements that may exceed EP-SE417T3’s 220,000 N\u00b7m in very hard rock with high thrust requirements. EP-SE418T3 at i=180\u2013230 provides the required thrust with adequate margin for very hard granite and quartzite geology where the per-unit thrust load at 270,000 N\u00b7m per unit is the design governing factor. The >94% efficiency is directly relevant for TBM propel drives, which operate at near-continuous duty for months at a time: lower heat generation per kilowatt reduces thermal management requirements in the confined tunnel propel ring environment.<\/p>\n<\/div>\n

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Ultra-Heavy Rope Shovels \u2014 Very Largest Production Class<\/h3>\n

The very largest electric rope shovels \u2014 machines with dipper capacities exceeding 100 cubic metres and operating weights approaching 2,000 tonnes \u2014 may require EP-SE418T3 for the crawler propel drives when site conditions produce drive torque requirements that exceed EP-SE417T3’s 220,000 N\u00b7m capacity with adequate safety margin. At very high-gradient mine bench access roads or on soft saturated ore floor, the tractive force demand at these machine weights can approach the EP-SE417T3 limit, and EP-SE418T3 provides the additional 22.7% torque capacity needed to maintain the required engineering safety factor. Korea Ever-Power calculates the specific drive torque requirement for any rope shovel specification same day.<\/p>\n<\/div>\n

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Extreme-Scale Marine and Offshore Crawler Systems<\/h3>\n

The largest offshore and marine heavy crawler platforms \u2014 systems moving the heaviest offshore platform deck sections, large jacket structures, and specialised marine infrastructure components of 3,000\u20135,000+ tonne payload \u2014 require EP-SE418T3 when total system weight exceeds EP-SE417T3’s service envelope. These systems operate in salt water immersion and highly corrosive marine atmospheres. EP-SE418T3’s 60\u201380 litre oil volume provides a larger contamination buffer in salt water environments, and the dual-cone floating metal face seals sustain full immersion without oil contamination. Auxiliary winch and tensioner equipment on these platforms use worm gear reducers<\/a> for self-locking cable drum hold, independent of the EP-SE418T3 travel drives.<\/p>\n<\/div>\n

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Specialised Heavy Industrial and Defence Platforms<\/h3>\n

EP-SE418T3 also serves specialised tracked platforms above 3,000 tonnes in defence, heavy industrial transport, nuclear power plant construction, and major civil infrastructure projects where the combination of machine weight, site gradient, and required safety factor produces drive torque demands that require 270,000 N\u00b7m per unit. The >94% efficiency reduces thermal signature in sensitive environments, and the robust dual-cone face seal system sustains contaminated environments without maintenance-intensive seal replacement programmes.<\/p>\n<\/div>\n

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Large-Scale Land Development and Major Infrastructure<\/h3>\n

Ultra-large tracked platforms for major dam construction, large coastal land reclamation projects, and major port infrastructure development at the extreme upper weight range require EP-SE418T3 when combined equipment weight and site resistance exceed the EP-SE417T3 service envelope. The downstream agricultural and land development gearboxes<\/a> for the heavy earth-working implement drives operate on separate PTO circuits independent of the EP-SE418T3 travel drives.<\/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, Ratio, Brake \u2014 Same Day<\/h3>\n

EP-SE418T3’s 3,000 rpm maximum applies, and motor displacement must be sized for this limit. Korea Ever-Power’s same-day engineering response covers: motor displacement for your hydraulic power at 3,000 rpm; ratio from i=166\u2013364; 2,000 N\u00b7m brake adequacy including counterbalance valve requirements; and dimensional cross-reference against your incumbent drive. For EP-SE418T3 versus EP-SE417T3 boundary applications, Korea Ever-Power calculates both simultaneously and provides a comparison document \u2014 no charge, before any order commitment.<\/p>\n<\/div>\n

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\ud83d\udd29<\/div>\n

Pre-Assembled and Tested at 2,200 kg<\/h3>\n

Korea Ever-Power provides EP-SE418T3 pre-assembled with matched large-displacement motor (3,000 rpm maximum), overcenter valve, and pressure relief valve. The 2,000 N\u00b7m brake is function-verified before shipping. At 2,200 kg requiring a \u22655,000 kg crane at the installation site, a pre-assembled and brake-verified unit arriving as a complete tested assembly is not just convenient \u2014 it is the practical approach. The unit arrives ready for a single crane lift into the chassis bore and hydraulic line connection, eliminating all on-machine motor fitting and brake commissioning.<\/p>\n<\/div>\n

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

Stage-Level Parts \u2014 2,200 kg Serviced<\/h3>\n

Korea Ever-Power stocks all EP-SE418T3 internal components by stage: Stage 1, 2, and 3 sun gear and planet set assemblies; 2,000 N\u00b7m brake disc pack (friction discs, separator plates, O-ring kit); dual-cone floating face seal kits; taper bearing sets per bearing position; housing O-ring kits. At 2,200 kg and 270,000 N\u00b7m, returning the unit to a factory for any component-level repair is practically impossible without a 100+ tonne crane relocation operation. Stage-level in-situ repair with Korea Ever-Power components is the only viable maintenance approach at this scale. For operators running multiple EP-SE418T3 units at the same site, Korea Ever-Power\u2019s same-day oil sampling guidance and stage-specific wear signature interpretation service allows the maintenance team to identify which units require attention and what components to pre-position, well ahead of any failure event. This forward-looking maintenance approach is especially important at 2,200 kg per unit, where an unplanned failure with no components on hand means a multi-week crane and logistics operation under any circumstances.<\/p>\n<\/div>\n

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\ud83d\udccb<\/div>\n

12\/18-Month Warranty<\/h3>\n

12 months from commissioning or 18 months from shipment, covering all three planetary stages, the 2,000 N\u00b7m brake assembly, and the floating face seals. Warranty parts dispatched from Korea Ever-Power stock \u2014 no requirement to return the 2,200 kg unit. For OEM fleet buyers stocking EP-SE418T3 before machine assembly, warranty begins at commissioning.<\/p>\n<\/div>\n

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\u23f1\ufe0f<\/div>\n

Stock and Framework Supply<\/h3>\n

Standard configurations from stock in 7\u201314 days. Pre-assembled packages: 30\u201345 days. At 2,200 kg and this torque class, an unplanned drive failure in a 5,000-tonne dragline or 22-metre TBM represents catastrophic project cost. Korea Ever-Power discusses reserved production capacity, consignment stock, and framework supply terms for the largest fleets at this scale. Contact Korea Ever-Power with fleet details and annual volume for emergency response planning and framework pricing.<\/p>\n<\/div>\n

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

\u221225\u00b0C to +90\u00b0C \u2014 2,200 kg Thermal Mass<\/h3>\n

At 2,200 kg nodular iron, the thermal mass is approximately 1,100 kJ per degree \u2014 the highest in the SE series on this site. Despite the >94% efficiency recovery, any absolute heat generation at 270,000 N\u00b7m scale is substantial; the 2,200 kg housing absorbs it most slowly, providing the longest thermal run-up time and greatest resistance to temperature peaks. For high-ambient and high-duty-cycle operation, Korea Ever-Power provides thermal assessment on request at no charge. At 2,200 kg of nodular cast iron with a surface area proportional to the unit’s physical scale, EP-SE418T3 also dissipates heat more effectively by natural convection than lighter SE units at the same housing temperature, reducing the effective thermal resistance to ambient relative to the heat generated per kilowatt of power transmitted. This contributes to maintaining housing surface temperature below the +90\u00b0C limit even in high-ambient environments with sustained maximum travel duty cycles, without additional cooling measures in most standard applications.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"why<\/p>\n

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Field Reviews<\/h2>\n
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P<\/div>\n
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P. Andriessen \u2014 Mining Equipment Systems Director<\/div>\n
Verified Purchase \u00b7 Antwerp, Belgium<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We supply propel drive systems for the world’s largest walking draglines, including crawler-based machines in the 5,000\u20136,500 tonne operating weight class at major coal and copper mines. Korea Ever-Power confirmed EP-SE418T3 for our largest platform after calculating that the required drive torque per unit at 5,800 tonnes on our worst-case access ramp configuration exceeded EP-SE417T3’s 220,000 N\u00b7m capacity with the safety factor our engineering specification mandates. At i=215 for our standard operational ratio, the spring brake provides 2,000 \u00d7 215 = 430,000 N\u00b7m per drive mechanical hold \u2014 verified at our 8\u00b0 acceptance gradient slope test with full machine weight. We also confirmed the >94% efficiency specification: our hydraulic oil temperature monitoring showed a measurable reduction in main pump outlet temperature compared to the EP-SE417T3 installations on our lighter machines, consistent with the higher efficiency reducing heat input to the hydraulic system. At 1,200 hours across four units at our Pilbara iron ore operation, zero failures.<\/p>\n

EP-SE418T3, i=215 \u00b7 5,800-t crawler dragline \u00b7 1,200 h, 4 units, >94% efficiency confirmed, zero failures<\/div>\n<\/div>\n
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X<\/div>\n
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X. Liu \u2014 TBM Engineering VP, Ultra-Large Projects<\/div>\n
Verified Purchase \u00b7 Wuhan, China<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Our largest project involved a 22.5-metre bore diameter mixed-ground TBM for a major river crossing in Hubei Province. The propel ring contained 48 individual drive units. Our ground load model for the hardest limestone strata sections required 250,000 N\u00b7m per unit with a 1.1\u00d7 service factor \u2014 275,000 N\u00b7m per unit required, which exceeded EP-SE417T3’s 220,000 N\u00b7m by a substantial margin. Korea Ever-Power confirmed EP-SE418T3 at i=185 for our advance rate requirement. The efficiency specification of >94% was critical for our ventilation design \u2014 48 drives operating continuously in a 22.5-metre tunnel generate substantial heat, and even 1% lower efficiency would have required additional ventilation capacity in our tunnel design. At 1,400 hours of continuous tunnelling through 4.8 km of tunnel (including 1.2 km of hard limestone at maximum thrust), zero EP-SE418T3 failures across all 48 drives. Korea Ever-Power’s 7-14 day stock availability was the deciding factor in our component supplier selection \u2014 our project schedule required guaranteed spare unit availability within a 2-week window throughout the tunnelling programme. We keep four complete EP-SE418T3 units on-site at the tunnel portal as operational reserves, which Korea Ever-Power replenishes from stock within 14 days each time we consume one. This just-in-time reserve system \u2014 enabled by Korea Ever-Power’s consistent stock availability \u2014 allowed us to reduce our initial stock holding from eight to four units without increasing project risk, reducing our upfront capital commitment by approximately half while maintaining full operational resilience.<\/p>\n

EP-SE418T3, i=185 \u00b7 22.5m river crossing TBM \u00b7 48 drives, 1,400 h, 4.8 km, zero failures<\/div>\n<\/div>\n
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M<\/div>\n
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M. Santos \u2014 Offshore Heavy Engineering Director<\/div>\n
Verified Purchase \u00b7 Rio de Janeiro, Brazil<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We operate tracked crawler platforms for moving very large pre-assembled topsides sections at our offshore fabrication yard near Campos. Our largest platform moves topsides up to 4,200 tonnes from the fabrication hall to the quayside for load-out. Korea Ever-Power specified EP-SE418T3 at i=248 for our 16 travel drives after confirming that our maximum site gradient combined with the heaviest topside load and a 1.25\u00d7 dynamic factor produced a per-unit drive torque of 258,000 N\u00b7m \u2014 above EP-SE417T3’s capacity. The 2,000 N\u00b7m brake at i=248 provides 2,000 \u00d7 248 = 496,000 N\u00b7m per drive hold, giving us 2.1\u00d7 safety factor against the maximum tractive force at our steepest yard gradient. Operating in a salt-laden, high-humidity coastal environment with regular high-pressure wash-down, the dual-cone floating face seals have shown zero oil contamination from water ingress in 2,500 hours across our 16 drives over three years of yard operation. The >94% efficiency has contributed to our platform’s hydraulic oil staying 4\u20136\u00b0C cooler than our previous European-supplied drives, measurably extending hydraulic component service life.<\/p>\n

EP-SE418T3, i=248 \u00b7 4,200-t offshore topside platform \u00b7 2,500 h, 16 drives, 3 years, zero seal failures<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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

EP-SE418T3 at 270,000 N\u00b7m is the highest-rated track drive planetary gearbox in the Korea Ever-Power SE series presented on this site. Korea Ever-Power’s manufacturing capability extends above this level for very specialised applications. Contact Korea Ever-Power for requirements above 270,000 N\u00b7m.<\/p>\n

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

SE400T1 (1,300 N\u00b7m, T1, 35 kg) through SE418T3 (270,000 N\u00b7m, T3, 2,200 kg) \u2014 a 207\u00d7 torque span across fifteen models in one consistent rotating-housing planetary gearbox architecture, and the only series where the highest-torque unit achieves a higher efficiency specification than the preceding five models. Korea Ever-Power SE series capability extends beyond EP-SE418T3 for the most specialised applications. Contact Korea Ever-Power for requirements above 270,000 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: from semiconductor EFEM precision drives to 270,000 N\u00b7m extreme heavy-duty crawlers \u2014 one engineering platform across the full torque spectrum.<\/p>\n

\"Series<\/p>\n<\/div>\n

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

Marine winch drives, offshore platform hoist gearboxes, excavator swing slewing drives, wheel drives. Complete heavy-duty industrial transmission portfolio 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>EP-SE418T3 is rated at >94% efficiency, which is higher than SE413T3\u2013SE417T3 at >93%. Is this correct?<\/h3>\n

Yes, this is correct and reflects real physics rather than a rounding or specification discrepancy. Three mechanisms explain the >94% efficiency at 270,000 N\u00b7m. First: at 2,200 kg, the gear pitch circle diameters are physically larger than in EP-SE417T3 (1,450 kg). At the same 3,000 rpm motor input, larger gears produce lower pitch-line velocity at the tooth contact, reducing hydrodynamic friction in the elastohydrodynamic oil film \u2014 the dominant source of gear mesh loss. Second: EP-SE418T3’s minimum ratio i=166 (vs i=123 for SE417T3) allows more uniform three-stage ratio distribution, reducing the peak torque in the highest-load stage and its associated friction loss. Third: the larger gear module at 270,000 N\u00b7m produces a higher contact ratio (more tooth pairs sharing load simultaneously) and lower specific sliding velocity across the tooth profile, both of which reduce friction loss. The net result is that the efficiency specification at this torque class is measurably higher than at the SE413T3\u2013SE417T3 range. Korea Ever-Power can provide detailed efficiency analysis for your specific ratio and operating point if required for your thermal or hydraulic circuit design. For TBM propel ring applications where many drives operate simultaneously in a confined underground environment, the difference between >93% and >94% efficiency across 40\u201348 drives at full thrust is several tens of kilowatts in total heat reduction \u2014 a meaningful contribution to the tunnel ventilation capacity requirement and the thermal management of the hydraulic system.<\/p>\n<\/div>\n

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Q<\/span>EP-SE418T3 starts at i=166 minimum ratio. EP-SE417T3 starts at i=123. Why does the larger unit have a higher minimum ratio?<\/h3>\n

The minimum ratio determines the fastest achievable output speed. At i=166 with 3,000 rpm motor input, the output is approximately 18.1 rpm \u2014 approximately 0.85 km\/h at a 800 mm sprocket radius. The 3,000\u20137,000+ tonne machines served by EP-SE418T3 do not need to travel faster than this under any operational scenario. Unlike EP-SE417T3, which serves machines ranging from 2,000 to 5,000+ tonnes (some of which may need faster repositioning using the i=123\u2013165 band), EP-SE418T3’s machine class is entirely slow-travel: the fastest useful travel speed for a 5,000-tonne dragline is already at or below the 0.85 km\/h that i=166 provides. Starting the ratio range at i=166 means all three stages can be optimised for the i=166\u2013364 operational band without reserving stage design capacity for a low-ratio band that the machine would never use. This optimisation contributes directly to the >94% efficiency specification by allowing each stage to operate at or near its optimal individual ratio throughout the operating range.<\/p>\n<\/div>\n

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Q<\/span>What are the oil volume, first-change procedure, and condition monitoring requirements for 2,200 kg?<\/h3>\n

EP-SE418T3 contains approximately 60\u201380 litres of gear oil depending on ratio configuration and motor adapter \u2014 the highest oil volume 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: allow 35\u201340 minutes full drain time with the unit warm \u2014 at 60\u201380 litres, incomplete drain leaves significant particle-laden oil in the sump. Refill with fresh 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 at each 500-hour interval is strongly recommended at this scale. With 60\u201380 litres, sampling provides a large representative volume \u2014 elemental baseline established at the 150-hour first change is the reference for all subsequent comparisons. Korea Ever-Power provides reference elemental baseline ranges for EP-SE418T3 units as part of the startup documentation package, and can advise on sample interpretation to distinguish stage-specific from bearing wear particle signatures. At 60\u201380 litres of oil per unit and multiple units per machine, a centralised sampling and analysis programme with results tracked against Korea Ever-Power\u2019s reference ranges provides the earliest possible warning of developing wear \u2014 well before any symptom is detectable in machine performance. This proactive approach, combined with Korea Ever-Power\u2019s 7\u201314 day stock availability for critical components, minimises unplanned machine downtime for what are typically the most production-critical machines in any mining or heavy civil operation.<\/p>\n<\/div>\n

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Q<\/span>Is EP-SE418T3 a direct replacement for Rexroth GFT or Bonfiglioli units in the 270,000 N\u00b7m class?<\/h3>\n

For triple-stage units in the 270,000 N\u00b7m torque class, Korea Ever-Power provides a full dimensional cross-reference before any order \u2014 spindle bore, drum OD, sprocket BCD, hydraulic port specifications, motor interface spigot, brake pilot port \u2014 against your specific legacy model number and ratio code. At 270,000 N\u00b7m, specialised configurations within the Rexroth GFT and Bonfiglioli 700C families are the reference benchmarks; the cross-reference confirms which EP-SE418T3 configuration matches exactly, and flags any dimension requiring a resolution path. Provide the full model number with all suffix codes for the most accurate same-day cross-reference. Rexroth and Bonfiglioli are trademarks of their respective owners, cited for dimensional reference only.<\/em><\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Specify EP-SE418T3 \u2014 Motor, Ratio, Efficiency Analysis, and Dimensional Fit Confirmed Before Order<\/h2>\n

Provide machine weight, gradient, circuit power, and incumbent drive model. Korea Ever-Power returns motor displacement for 3,000 rpm max, ratio from i=166\u2013364, brake and counterbalance adequacy, and dimensional match \u2014 same day, no charge.<\/p>\n

270,000 N\u00b7m \u00b7 i=166\u2013364 \u00b7 Triple-Stage T3 \u00b7 2,000 N\u00b7m brake \u00b7 >94% \u00b7 3,000 rpm max \u00b7 \u221225\u00b0C to +90\u00b0C \u00b7 ~2,200 kg<\/p>\n

Request Quote \u2014 EP-SE418T3 \u2192<\/a><\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
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\u2605 >94% Efficiency at 270,000 N\u00b7m \u2014 The Reversal That Requires Explanation<\/div>\n

From SE413T3 through EP-SE417T3 track drive planetary gearbox, every large-capacity SE unit carries a >93% efficiency rating \u2014 a slight reduction from the >94% of smaller T3 units. EP-SE418T3 is rated at >94% \u2014 higher than its immediate predecessor despite being the most powerful unit in the SE series on this site. This is not a specification anomaly: at 270,000 N\u00b7m and 2,200 kg, the gear pitch circle diameters are substantially larger than in EP-SE417T3. Larger pitch diameters at 3,000 rpm mean lower pitch-line velocity at the gear mesh. Lower pitch-line velocity reduces hydrodynamic friction in the elastohydrodynamic oil film at each tooth contact, directly raising gear mesh efficiency. Additionally, EP-SE418T3’s ratio range starts at i=166 (versus i=123 for EP-SE417T3), enabling more uniform stage-by-stage reduction across all three planetary stages, which reduces the peak torque in the highest-loaded stage and the associated friction loss there.<\/p>\n<\/div>","protected":false},"featured_media":851,"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-847","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\/fr\/wp-json\/wp\/v2\/product\/847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/comments?post=847"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/media\/851"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/media?parent=847"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/product_brand?post=847"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/product_cat?post=847"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/fr\/wp-json\/wp\/v2\/product_tag?post=847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}