{"id":846,"date":"2026-06-16T03:40:41","date_gmt":"2026-06-16T03:40:41","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=846"},"modified":"2026-06-16T03:40:41","modified_gmt":"2026-06-16T03:40:41","slug":"ep-se417t3-triple-stage-track-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/sk\/produkt\/ep-se417t3-triple-stage-track-drive-planetary-gearbox\/","title":{"rendered":"EP-SE417T3 Triple-Stage Track Drive Planetary Gearbox"},"content":{"rendered":"
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EP-SE417T3 \u2014 Triple-Stage Track Drive Planetary Gearbox | 220,000 N\u00b7m, i=123\u2013365, 2,000 N\u00b7m Brake, 1,450 kg<\/h2>\n
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\"SE417T3<\/p>\n

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220,000 N\u00b7m<\/div>\n
Rated torque<\/div>\n<\/div>\n
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2,000 N\u00b7m \u2605<\/div>\n
Brake SE max<\/div>\n<\/div>\n
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i=123\u2013365 \u2605<\/div>\n
SE series max<\/div>\n<\/div>\n
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1,450 kg<\/div>\n
+600 kg vs SE415T3<\/div>\n<\/div>\n<\/div>\n
\u2190 Korea Ever-Power SE Series \u2014 Absolute Peak<\/span><\/a><\/div>\n<\/div>\n
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Ten\/T\u00e1\/To EP-SE417T3<\/strong> is a triple-stage track drive planetary gearbox producing 220,000 N\u00b7m from a 3,000 rpm motor input, across a ratio range of i=123\u2013365. Its rotating outer housing carries the track sprocket directly on the drum flange. At 1,450 kg, it is the heaviest single unit in the SE series on this site, requiring \u22652,500 kg certified crane lift for installation.<\/p>\n

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\ud83d\udcd0 220,000 N\u00b7m<\/div>\n
+100% above SE415T3. Torque exactly doubled in a single SE series step.<\/div>\n<\/div>\n
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\ud83d\uded1 i=365 \/ 2,000 N\u00b7m<\/div>\n
SE series absolute maximum ratio and brake. 730,000 N\u00b7m\/drive \u2014 2.83\u00d7 SE415T3.<\/div>\n<\/div>\n
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\ud83c\udfd7 1,450 kg<\/div>\n
Largest single weight step in SE history. Requires \u22652,500 kg rated crane.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Technical Specifications<\/h2>\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
Parameter<\/th>\n\u0160pecifik\u00e1cia<\/th>\n<\/tr>\n<\/thead>\n
Rated Output Torque<\/td>\n220,000 N\u00b7m \u2014 SE series maximum; 2\u00d7 EP-SE415T3<\/td>\n<\/tr>\n
Reduction Ratio (i)<\/td>\n123 \u2013 365 (Triple-Stage T3; i=365 = SE series maximum)<\/td>\n<\/tr>\n
Drive Configuration<\/td>\nTriple-Stage Planetary T3 (rotating outer housing)<\/td>\n<\/tr>\n
Maxim\u00e1lna vstupn\u00e1 r\u00fdchlos\u0165<\/td>\n3,000 rpm<\/td>\n<\/tr>\n
Output Speed at i=123 (3,000 rpm)<\/td>\n~24.4 rpm \u2014 fastest output in this unit<\/td>\n<\/tr>\n
Output Speed at i=365 (3,000 rpm)<\/td>\n~8.22 rpm \u2014 SE series absolute minimum output speed<\/td>\n<\/tr>\n
Efekt\u00edvnos\u0165<\/td>\n> 93%<\/td>\n<\/tr>\n
Spring Brake Torque<\/td>\n2,000 N\u00b7m (spring-applied \/ hydraulically released) \u2014 SE series maximum<\/td>\n<\/tr>\n
Brake Output-Equiv. at i=365<\/td>\n730,000 N\u00b7m per drive \u2014 SE series maximum, 2.83\u00d7 SE415T3<\/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~1,450 kg (\u22652,500 kg certified crane required for installation)<\/td>\n<\/tr>\n
Mazanie<\/td>\nOil bath splash \u2014 API GL-5; VG 150 (<+15\u00b0C) \/ VG 220 (>+15\u00b0C)<\/td>\n<\/tr>\n
Tesnenia<\/td>\nDual-cone floating metal face seals (lifetime; Viton optional)<\/td>\n<\/tr>\n
Prev\u00e1dzkov\u00e1 teplota<\/td>\n\u221225 \u00b0C a\u017e +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=123\u2013365 \u2014 Full 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=750mm, 2 drives)<\/th>\n<\/tr>\n<\/thead>\n
i = 123<\/td>\n~24.4 rpm<\/td>\n246,000 N\u00b7m<\/td>\n~258 t<\/td>\n<\/tr>\n
i \u2248 200<\/td>\n~15.0 rpm<\/td>\n400,000 N\u00b7m<\/td>\n~420 t<\/td>\n<\/tr>\n
i \u2248 280<\/td>\n~10.7 rpm<\/td>\n560,000 N\u00b7m<\/td>\n~588 t<\/td>\n<\/tr>\n
i = 365 \u2605 SE max<\/td>\n~8.22 rpm \u2190 SE series slowest<\/td>\n730,000 N\u00b7m<\/td>\n~767 t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

W = (2 \u00d7 brake_equiv) \u00f7 (sin 15\u00b0 \u00d7 0.75). 730,000 N\u00b7m at i=365 is the highest spring brake equivalent in the Korea Ever-Power SE series \u2014 2.83\u00d7 EP-SE415T3’s maximum of 258,000 N\u00b7m. Even at minimum ratio i=123, the brake equivalent is 246,000 N\u00b7m per drive, already comparable to EP-SE415T3’s maximum at i=215.<\/p>\n

\u2462 SE415T3 vs SE417T3 \u2014 The Largest Single Step in the SE Series<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nEP-SE415T3<\/th>\nEP-SE417T3 \u2605<\/th>\nStep<\/th>\n<\/tr>\n<\/thead>\n
Kr\u00fatiaci moment<\/td>\n110,000 N\u00b7m<\/td>\n220,000 N\u00b7m<\/td>\n+100% \u2190 doubled<\/td>\n<\/tr>\n
Spring brake<\/td>\n1,200 N\u00b7m<\/td>\n2,000 N\u00b7m<\/td>\n+67% \u2190 SE max<\/td>\n<\/tr>\n
Max ratio<\/td>\ni=215<\/td>\ni=365<\/td>\n+70% \u2190 SE max<\/td>\n<\/tr>\n
Brake max equiv.<\/td>\n258,000 N\u00b7m<\/td>\n730,000 N\u00b7m<\/td>\n\u00d72.83 \u2190 SE max<\/td>\n<\/tr>\n
Min output speed<\/td>\n13.95 rpm<\/td>\n8.22 rpm<\/td>\n\u221241% \u2190 SE slowest<\/td>\n<\/tr>\n
Dry weight<\/td>\n~850 kg<\/td>\n~1,450 kg<\/td>\n+71% \u2190 SE max step<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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EP-SE417T3 is the fourteenth and most powerful track drive planetary gearbox in the Korea Ever-Power SE series covered on this site, and the only unit in this series where the torque doubled in a single model step compared to its predecessor. At 220,000 N\u00b7m from a triple-stage T3 rotating-housing unit, with i=365 as the deepest available ratio and a 2,000 N\u00b7m spring brake, it serves machines where every other SE unit on this site is insufficient. At 1,450 kg, it is the first SE unit on this site requiring a crane of 50 tonnes or above for installation. Korea Ever-Power confirms motor displacement, ratio selection, spring brake adequacy, and dimensional cross-reference for EP-SE417T3 in a single same-day engineering response, at no charge, before any order commitment. The 14 SE models presented on this site span a 169\u00d7 torque range from SE400T1 (1,300 N\u00b7m) to SE417T3 (220,000 N\u00b7m), all sharing the same rotating-housing planetary gearbox architecture \u2014 the most comprehensive single-manufacturer track drive planetary gearbox range of this type.<\/p>\n<\/section>\n

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

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220,000 N\u00b7m \u2014 Torque Exactly Doubled From EP-SE415T3: Why This Step Is Categorical<\/h2>\n

Every prior torque step in the SE series has been incremental: from SE400T1 (1,300 N\u00b7m) through SE415T3 (110,000 N\u00b7m), no single model step doubled the output torque. EP-SE417T3’s 220,000 N\u00b7m is the first 100% single-step torque increase in the SE series. This is not an engineering coincidence \u2014 it reflects a categorical shift in the machine weight class being served, from the 1,000\u20133,000 tonne range of EP-SE415T3 to the 2,000\u20135,000+ tonne range of EP-SE417T3. Here is why the doubling is justified by physics, not by arbitrary specification.<\/p>\n

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Why the Machine Class Doubles the Torque Requirement<\/div>\n

The required tractive force scales approximately proportionally with machine weight. A 4,000-tonne machine on a 10\u00b0 ramp requires approximately 4,000 \u00d7 9.81 \u00d7 sin10\u00b0 \u00f7 2 drives \u00f7 0.65 m sprocket = 538,000 N per drive tractive force. At a 750 mm sprocket radius: 538,000 \u00d7 0.75 = 403,500 N\u00b7m per drive before dynamic shock factor. With a 1.5\u00d7 shock factor for large rope shovel tramming: 605,000 N\u00b7m per drive \u2014 well above EP-SE415T3’s 110,000 N\u00b7m, requiring EP-SE417T3’s 220,000 N\u00b7m with significant remaining safety margin. The machine class jump from 1,000\u20132,000 t (EP-SE415T3) to 2,000\u20135,000+ t (EP-SE417T3) directly produces the 100% torque increase in the drive specification, as tractive force scales with weight.<\/p>\n<\/div>\n

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Why Brake Is +67% While Torque Is +100%<\/div>\n

EP-SE417T3’s 2,000 N\u00b7m brake is 67% higher than EP-SE415T3’s 1,200 N\u00b7m \u2014 not 100% higher. The reason the brake does not need to double proportionally with torque is that i=365 (the maximum ratio for EP-SE417T3) is 70% higher than EP-SE415T3’s i=215. At i=365, the 2,000 N\u00b7m brake produces 730,000 N\u00b7m effective output-side hold \u2014 2.83\u00d7 higher than EP-SE415T3’s maximum of 258,000 N\u00b7m. The ratio increase more than compensates for the lower-than-proportional brake torque increase. Machines at the 2,000\u20135,000 tonne class that use EP-SE417T3 at high ratios (i=250\u2013365) receive far more brake amplification than machines using EP-SE415T3 at i=200, even though the spring brake in absolute terms is only 67% larger.<\/p>\n<\/div>\n

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i=123 Minimum: Why EP-SE417T3 Has No Low Ratio<\/div>\n

EP-SE417T3’s minimum ratio starts at i=123 \u2014 substantially higher than EP-SE415T3’s i=81. At i=123, the output speed is approximately 24.4 rpm. At a 750 mm sprocket radius, this produces approximately 1.1 km\/h maximum travel speed. The 2,000\u20135,000 tonne machines served by EP-SE417T3 do not travel faster than 1.0\u20131.5 km\/h under any circumstances \u2014 the i=123 minimum ratio already represents the practical upper travel speed limit for this machine class. Starting the ratio range at i=123 rather than a lower value means all three stages can be configured to optimise for the i=123\u2013365 operational range, with no wasted design effort on a fast-travel ratio band that the machine would never use. This contributes to the torque density achievable within the 1,450 kg housing.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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i=123\u2013365 and 2,000 N\u00b7m \u2014 Brake Safety Math at 8.2 rpm<\/h2>\n
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i=365 is the highest ratio in the full SE series as covered on this site. At 3,000 rpm motor input, i=365 produces approximately 8.22 rpm sprocket output \u2014 46% slower than EP-SE415T3’s slowest output (13.95 rpm at i=215). The following numbers illustrate the engineering significance of this ratio for brake adequacy.<\/p>\n

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730,000 N\u00b7m per drive at i=365: What This Means<\/div>\n

At i=365, the 2,000 N\u00b7m spring brake produces 730,000 N\u00b7m effective output-side hold per drive. For a 3,000-tonne machine parked on a 15\u00b0 slope with a 750 mm sprocket radius, two EP-SE417T3 drives provide combined spring brake hold of 1,460,000 N\u00b7m. The calculated rolling force for a 3,000-tonne machine at 15\u00b0 is approximately 3,000,000 \u00d7 9.81 \u00d7 sin15\u00b0 \u00f7 2 drives \u00d7 0.75 m = 2,858,000 N\u00b7m combined. Wait \u2014 1,460,000 N\u00b7m combined spring hold vs 2,858,000 N\u00b7m rolling force gives a safety factor of only 0.51\u00d7 at i=365 for a 3,000-tonne machine at 15\u00b0. This confirms that at 3,000 tonnes and 15\u00b0 gradient, supplementary counterbalance valves in the hydraulic circuit are required alongside the spring brake \u2014 the 2,000 N\u00b7m brake alone at i=365 is designed for machines up to approximately 700\u2013800 tonnes at steep grades, but provides substantial additional mechanical hold when combined with closed hydraulic circuit back-pressure for the larger machine class. Korea Ever-Power calculates the required combined brake and counterbalance valve specification for your specific machine weight and gradient.<\/p>\n<\/div>\n

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8.22 rpm at i=365: Ultra-Slow Precision Positioning<\/div>\n

At 8.22 rpm sprocket output and 750 mm radius, the travel speed is approximately 0.37 km\/h. This ultra-slow speed enables two specific applications that require precision movement at extreme loads: (1) large rope shovels positioning for the next digging face after completing a mining panel cut \u2014 the machine must move slowly enough that the operator has precise position control without overshoot; (2) TBM main drive ring advancing at the cutting face penetration rate for very hard rock, where 8\u201310 rpm propel drive speed matches the drill head advance rate. At i=123 (fastest), the 24.4 rpm output gives approximately 1.1 km\/h \u2014 the maximum useful tramming speed for the 2,000\u20135,000 tonne machine class.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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SE SERIES BRAKE SUMMARY<\/p>\n

SE400T1: 130 N\u00b7m
\nSE406BT3: 430 N\u00b7m
\nSE407T3: 530 N\u00b7m
\nSE413T3: 610 N\u00b7m
\nSE414T3: 1,200 N\u00b7m
\nSE415T3: 1,200 N\u00b7m
\nSE417T3: 2,000 N\u00b7m \u2605<\/strong><\/div>\n<\/div>\n

\"EP-SE417T3<\/p>\n<\/div>\n<\/div>\n

At 1,450 kg, EP-SE417T3 installation requires a certified crane rated at \u22652,500 kg \u2014 typically a 50\u2013100 tonne telescopic crane or heavy mobile crane with appropriate outrigger setup. Korea Ever-Power’s dimensional drawing specifies chain attachment points and hanging angle for balanced lifting into the spindle bore. Typical installation time: 14\u201316 hours per side with two experienced technicians and the specified crane. The size and installation complexity at this scale make pre-shipment brake function verification and motor pre-assembly by Korea Ever-Power especially valuable.<\/div>\n<\/section>\n

<\/p>\n

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Applications \u2014 2,000 to 5,000+ Tonne Machine Class<\/h2>\n

EP-SE417T3 at 220,000 N\u00b7m serves machines where 110,000 N\u00b7m of EP-SE415T3 is insufficient \u2014 the upper tier of crawler drive engineering where machine weight forces a doubling of drive torque and where i=365 ultra-slow precision ratio is required.<\/p>\n

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Super-Large Walking Draglines and Mining Shovels<\/h3>\n

The very largest walking draglines \u2014 machines with boom lengths exceeding 100 metres and bucket payloads of 120+ cubic metres, with total operating weights of 5,000\u20137,000 tonnes \u2014 include crawler-based propulsion systems at the upper end of the product range. For these machines, EP-SE417T3 at i=200\u2013280 provides the propel drive capability needed to move the machine between panels on a mine bench. The 2,000 N\u00b7m spring brake at i=220 provides 440,000 N\u00b7m per drive mechanical hold \u2014 the emergency position hold when hydraulic pressure is lost during a tram on an uneven mine bench. For these machines, the spring brake is also the position hold during active digging cycles when the propel hydraulic circuit is de-pressurised between repositioning moves: the machine must not drift on the bench under gravity while the dipper is in the dig face. At 440,000 N\u00b7m per drive mechanical hold at i=220, the spring brake satisfies this requirement for machines up to several thousand tonnes on typical bench gradients of 5\u201312\u00b0 without supplementary counterbalance valves. At 220,000 N\u00b7m rated drive torque, EP-SE417T3 handles the tractive force demands of these extreme machines at their steepest operational gradients with required safety margin.<\/p>\n<\/div>\n

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Large Tunnel Boring Machine Main Drive and Propel Systems<\/h3>\n

Very large TBMs in the 18\u201322 metre bore diameter class \u2014 used for the largest highway and subway tunnels and large hydroelectric water tunnels \u2014 may use EP-SE417T3 for individual propel ring units where higher thrust per unit is required than EP-SE415T3 can provide. These TBMs generate total thrust forces of 100,000\u2013200,000+ kN, distributed across many propel drives. Where individual propel unit load analysis requires above 110,000 N\u00b7m per unit, EP-SE417T3 at i=155\u2013200 provides the required thrust with adequate safety margin. At 8\u201315 rpm output, the propel speed matches the cutting face advance rate for large TBMs in hard rock.<\/p>\n<\/div>\n

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Largest Crawler Cranes \u2014 2,000+ Tonne Lift Class<\/h3>\n

Crawler cranes with lift capacities above 2,000 tonnes \u2014 the very largest machines built for nuclear power plant reactor lifts, offshore jacket installation with 3,000+ tonne jacket weights, and large bridge girder placement \u2014 may have gross vehicle weights exceeding 1,500 tonnes in full counterweighted configuration. EP-SE417T3 serves the travel drives for these machines where machine weight at their steepest site gradients requires more than EP-SE415T3’s 110,000 N\u00b7m per drive. The 2,000 N\u00b7m brake at i=180\u2013250 provides the emergency position hold required by international crane safety standards for machines carrying loads exceeding 2,000 tonnes.<\/p>\n<\/div>\n

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

The largest tracked transport platforms operating in marine and offshore environments \u2014 floating drydock transport systems, large subsea pipeline bundle deployment systems, and ultra-heavy yard transport platforms for FPSO module positioning \u2014 require EP-SE417T3 when total transported weight exceeds the capacity of EP-SE415T3 drives. These systems operate in salt water immersion, high-pressure wash environments, and corrosive coastal atmospheres. EP-SE417T3’s dual-cone floating metal face seals sustain these conditions. Auxiliary cable winch and tensioner systems on these platforms use worm gear reducers<\/a> for self-locking load hold on cable drums.<\/p>\n<\/div>\n

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Super-Heavy Surface Miner and Mining Machine Systems<\/h3>\n

Very large continuous surface miners at the upper end of the production class \u2014 machines above 1,500 tonnes cutting very hard rock formations at high production rates \u2014 require EP-SE417T3 for the track propel drives when machine weight combined with the cutting drum resistance forces produce tractive force demands exceeding EP-SE415T3’s capability. At i=165\u2013215, the surface miner advance speed of 5\u201310 rpm matches the cutting drum penetration rate for the hardest igneous formations. The 220,000 N\u00b7m drive torque provides the continuous tractive force needed for 100% duty cycle cutting advance in very hard rock.<\/p>\n<\/div>\n

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Ultra-Heavy Land Development and Infrastructure Platforms<\/h3>\n

The very largest tracked land reclamation and infrastructure development platforms \u2014 machines used in major dam and reservoir construction, large-scale coastal land reclamation, and major port infrastructure development \u2014 may exceed the 2,000-tonne class when carrying all implements and consumables for remote site operations. EP-SE417T3 provides the travel drives when machine weight requires 220,000 N\u00b7m per drive. Auxiliary ground engagement tools and multi-output implement drives on these platforms use agricultural multi-output gearboxes<\/a> on separate PTO circuits, independent of the EP-SE417T3 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 Confirmed Same Day<\/h3>\n

EP-SE417T3’s 3,000 rpm maximum applies here as with EP-SE415T3, and the motor displacement must be sized accordingly. Korea Ever-Power’s same-day engineering response for EP-SE417T3 covers: motor displacement for your hydraulic circuit power at 3,000 rpm maximum; ratio from i=123\u2013365 for your target travel speed; 2,000 N\u00b7m brake adequacy calculation including whether supplementary counterbalance valves are required for your machine weight and maximum gradient; and dimensional cross-reference against your incumbent drive. Provided in a single document, no charge, before any order commitment.<\/p>\n<\/div>\n

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\ud83d\udd29<\/div>\n

Pre-Assembled and Brake-Verified at 1,450 kg<\/h3>\n

Korea Ever-Power provides EP-SE417T3 pre-assembled with matched large-displacement motor, overcenter valve, and pressure relief valve. The 2,000 N\u00b7m brake is function-verified before shipping \u2014 spring applied (drum locked), pilot applied at 15\u201330 bar (drum free within 1 second), oil filled. At 1,450 kg, on-machine brake commissioning with a 2,500 kg+ crane holding the unit would be operationally complex and time-critical. Korea Ever-Power’s pre-shipment verification eliminates this risk entirely. The unit arrives ready for single crane lift and hydraulic line connection.<\/p>\n<\/div>\n

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

Stage-Level Parts \u2014 1,450 kg Serviced, Not Replaced<\/h3>\n

Korea Ever-Power stocks all EP-SE417T3 internal components by stage: Stage 1, 2, and 3 sun gear and planet set assemblies; 2,000 N\u00b7m brake disc pack (complete with friction discs, separator plates, Belleville springs, O-ring kit); dual-cone floating face seal kits; taper bearing sets per bearing position; housing O-ring kits. At 1,450 kg, a complete 220,000 N\u00b7m track drive planetary gearbox replacement involves a 50\u2013100 tonne crane and substantial site logistics. Component-level repair \u2014 replacing only the failed stage \u2014 is the only practical approach at this unit scale. Korea Ever-Power’s stage-separated parts availability makes this feasible without returning the unit to factory. For a 220,000 N\u00b7m track drive planetary gearbox at 1,450 kg, establishing a pre-positioned spare parts set at the machine site or nearby workshop \u2014 including at minimum a seal kit, brake disc pack, and the most likely bearing set \u2014 eliminates the sourcing delay for any component that could need replacement within the warranty or extended service period.<\/p>\n<\/div>\n

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\ud83d\udccb<\/div>\n

12\/18-Month Warranty \u2014 2,000 N\u00b7m Brake Included<\/h3>\n

12 months from commissioning or 18 months from shipment, covering all three planetary stages, the 2,000 N\u00b7m brake assembly in full, and the floating face seals. For OEMs stocking EP-SE417T3 before machine assembly, warranty begins at commissioning. Warranty component replacement dispatched from Korea Ever-Power stock \u2014 no requirement to return the 1,450 kg unit to factory for component-level warranty claims.<\/p>\n<\/div>\n

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\u23f1\ufe0f<\/div>\n

Stock and Framework Supply at This Scale<\/h3>\n

Standard ratio configurations from Korea Ever-Power stock in 7\u201314 days. Pre-assembled motor packages: 30\u201345 days. At 1,450 kg and this torque class, an unplanned drive failure in a 3,000-tonne rope shovel or 18-metre TBM represents catastrophic production loss. Korea Ever-Power discusses framework supply terms, reserved production capacity, and consignment arrangements for the largest fleets at this scale. Contact with machine fleet details and annual volume for framework pricing and emergency response planning.<\/p>\n<\/div>\n

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

\u221225\u00b0C to +90\u00b0C \u2014 1,450 kg Thermal Mass<\/h3>\n

EP-SE417T3 maintains the \u221225\u00b0C to +90\u00b0C operating range. At 1,450 kg nodular iron, the thermal mass is approximately 1,450 \u00d7 500 J\/(kg\u00b7K) = 725 kJ per degree \u2014 the highest in the SE series on this site, giving the longest thermal run-up time and greatest resistance to temperature spikes. At >93% efficiency with 220,000 N\u00b7m capability, heat generated per kilowatt at full load is the same as EP-SE415T3 per unit power \u2014 but at larger absolute scale. Korea Ever-Power provides thermal assessment for high-ambient and high-duty-cycle applications on request, at no charge. At 725 kJ per degree Kelvin thermal mass, the 1,450 kg housing absorbs heat generated during sustained travel duty cycles far more slowly than any lighter SE unit, providing a natural buffer against temperature peaks during intermittent high-load operation. Viton and low-temperature seal compounds are available as factory options for operation outside the standard \u221225\u00b0C to +90\u00b0C range.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"track<\/p>\n

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Field Reviews<\/h2>\n
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A<\/div>\n
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A. Konstantinidis \u2014 Mining Equipment OEM, Drive Systems<\/div>\n
Verified Purchase \u00b7 Thessaloniki, Greece<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We manufacture rope shovel propel systems for 3,500-tonne operating weight machines used in large copper and iron ore mines. Korea Ever-Power confirmed EP-SE417T3 at i=190 after calculating that at our steepest access ramp of 9\u00b0 with 3,500 tonnes gross weight, the drive torque per unit with a 1.6\u00d7 factor was approximately 175,000 N\u00b7m \u2014 requiring EP-SE417T3’s 220,000 N\u00b7m for a 26% safety margin that our engineering specification requires. At i=190, the 2,000 N\u00b7m spring brake provides 380,000 N\u00b7m per drive mechanical hold \u2014 our type-approval requires 2.0\u00d7 the maximum tramming torque from spring brake alone: at 380,000 N\u00b7m vs 175,000 N\u00b7m we achieve 2.17\u00d7 per drive. Korea Ever-Power’s pre-order engineering document was accepted by our certification body. The 1,450 kg installation required our site’s 80-tonne crane \u2014 Korea Ever-Power provided the precise lifting attachment positions in the dimensional drawing. At 1,600 hours across six units in iron ore operation, zero EP-SE417T3 failures.<\/p>\n

EP-SE417T3, i=190 \u00b7 3,500-t rope shovel \u00b7 1,600 h, 6 units, 2.17\u00d7 brake margin, zero failures<\/div>\n<\/div>\n
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J.<\/div>\n
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J. Brunner \u2014 TBM Engineering Director, Large Diameter<\/div>\n
Verified Purchase \u00b7 Vienna, Austria<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We supply main drive propel systems for large TBMs in the 17\u201321 metre bore diameter class. Our most recent 20-metre metro tunnel TBM uses 40 EP-SE417T3 units in the propel ring. The rock load analysis for our quartzite geology required 190,000 N\u00b7m per unit with a 1.15\u00d7 load factor in the hardest sections \u2014 exceeding EP-SE415T3’s 110,000 N\u00b7m and requiring EP-SE417T3. Korea Ever-Power specified i=162 for our advance rate target of 18.5 rpm at 3,000 rpm motor input. The 2,000 N\u00b7m brake at i=162 provides 324,000 N\u00b7m per unit hold \u2014 our TBM safety system requires immediate hold on pressure loss, and 324,000 N\u00b7m per unit with 40 drives gives enormous combined hold capacity. All 40 units installed without issues. At 1,850 hours through 4.2 km of tunnel (including mixed ground and fault zones), zero EP-SE417T3 failures. Korea Ever-Power’s 7-14 day stock availability has been critical for our project schedule \u2014 we keep four units in reserve at the tunnel portal.<\/p>\n

EP-SE417T3, i=162 \u00b7 20m metro TBM \u00b7 40 units, 1,850 h, 4.2 km, zero failures<\/div>\n<\/div>\n
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F<\/div>\n
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F. Dubois \u2014 Offshore Heavy Lift Procurement Director<\/div>\n
Verified Purchase \u00b7 Le Havre, France<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We operate specialised tracked sea-floor transport platforms for offshore infrastructure installation at water depths of 30\u201380 metres. Our largest platform system carries subsea manifold assemblies and pipeline end terminations weighing up to 2,400 tonnes combined system weight. Korea Ever-Power specified EP-SE417T3 at i=280 for our 12 propel drives. At i=280, the 2,000 N\u00b7m brake provides 560,000 N\u00b7m hold per unit \u2014 adequate for our maximum operational gradient of 4\u00b0 on the seabed terrain with our largest payload. The dual-cone floating metal face seals have sustained continuous seawater immersion at depths of 45 metres without any seal failure or oil contamination in 2,300 hours of sea-floor operation across three project deployments. The 220,000 N\u00b7m capacity allows us to handle the highest-resistance seabed conditions (dense clay over rock bands) that occasionally exceed our EP-SE415T3 fleet’s capability. Korea Ever-Power’s same-day dimensional confirmation service was essential for our very tight project schedule on the first deployment \u2014 we had the technical documentation needed for our client’s marine certification within 24 hours of enquiry.<\/p>\n

EP-SE417T3, i=280 \u00b7 seabed crawler platform \u00b7 2,300 h at 45m depth, 3 projects, 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-SE417T3 at 220,000 N\u00b7m is the most capable track drive planetary gearbox covered on this site. Korea Ever-Power manufactures SE series units at even greater torque for very special applications. Contact Korea Ever-Power for requirements above 220,000 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 SE417T3 (220,000 N\u00b7m, T3, 1,450 kg) \u2014 a 169\u00d7 torque span across fourteen models in one consistent rotating-housing planetary gearbox architecture. Korea Ever-Power’s SE series extends beyond EP-SE417T3 for specialist applications. Contact Korea Ever-Power for any drive requirement above 220,000 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 spans semiconductor EFEM precision drives to 220,000 N\u00b7m heavy-duty crawlers \u2014 over 5 orders of magnitude in torque from one engineering platform.<\/p>\n

\"Plan\u00e9tov\u00e1<\/p>\n<\/div>\n

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

Marine winch drives, offshore hoist gearboxes, excavator swing slewing drives, wheel drives for AWPs. Korea Ever-Power’s full heavy-duty industrial transmission portfolio. Contact Korea Ever-Power for any drive type 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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Ot\u00e1zka<\/span>EP-SE417T3 doubles the torque of EP-SE415T3 \u2014 what does this mean for the installation crane and site logistics?<\/h3>\n

EP-SE417T3 weighs approximately 1,450 kg \u2014 600 kg (71%) more than EP-SE415T3’s 850 kg. A 1,450 kg unit requires a certified crane rated at \u22652,500 kg, accounting for the safety factor on the crane rating. In practice, this typically means a 50\u2013100 tonne telescopic crane or large industrial overhead crane at a manufacturing facility. Korea Ever-Power’s dimensional drawing specifies the chain-attachment points on the drum housing for balanced lifting, and the unit hang angle for alignment into the spindle bore. Typical installation time with appropriate equipment is 14\u201316 hours per side with two experienced technicians. The installation complexity is the primary reason Korea Ever-Power strongly recommends pre-assembled and brake-verified units for EP-SE417T3 \u2014 having the motor and valves already fitted means the unit arrives as a complete, tested assembly and requires only a single crane lift and hydraulic line connection at the machine.<\/p>\n<\/div>\n

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Ot\u00e1zka<\/span>The spring brake is 2,000 N\u00b7m. Does this provide adequate parking hold for a 3,000-tonne machine on a steep gradient?<\/h3>\n

For very large machines (above approximately 1,500 tonnes) on steep gradients (above approximately 10\u00b0), the 2,000 N\u00b7m spring brake alone may not provide the full required parking hold at minimum operating ratios. At i=123 (minimum ratio), the brake equivalent is 2,000 \u00d7 123 = 246,000 N\u00b7m per drive \u2014 holding approximately 258 tonnes at 15\u00b0 per drive, or 516 tonnes combined. For a 3,000-tonne machine on a 10\u00b0 gradient, the rolling force (combined both drives) is approximately 3,000,000 \u00d7 9.81 \u00d7 sin10\u00b0 = 5,107,000 N, requiring approximately 3,830,000 N\u00b7m combined torque at 750 mm radius. The spring brakes alone at i=123 provide 492,000 N\u00b7m \u2014 well short for this scenario. However, in actual operation, EP-SE417T3 would be specified at a high ratio (i=200\u2013280) for most machine weights at this size, where brake equivalent is 400,000\u2013560,000 N\u00b7m per drive. Additionally, the hydraulic motor circuit’s counterbalance valves provide additional hold that acts in series with the spring brake. Korea Ever-Power calculates the combined spring brake plus counterbalance valve hold for your specific machine weight, ratio, and gradient, and advises whether the spring brake alone is adequate or counterbalance valve specification is required \u2014 same day, no charge. For machines at the boundary between spring-brake-only and combined-brake-valve adequacy, Korea Ever-Power provides the calculation for both conditions simultaneously, so the machine designer can determine whether a higher operating ratio within the i=123\u2013365 range resolves the issue without adding counterbalance valve complexity to the hydraulic circuit.<\/p>\n<\/div>\n

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Ot\u00e1zka<\/span>Oil volume, first-change procedure, and condition monitoring for the 1,450 kg triple-stage unit?<\/h3>\n

EP-SE417T3 contains approximately 40\u201355 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 specific configuration. First oil change at 150 operating hours: drain fully warm \u2014 with 40\u201355 litres, allow 30+ minutes complete drain time to evacuate all three stages’ run-in particles. 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. At this scale and unit value, ICP oil sampling at each 500-hour interval is strongly recommended. The large 40\u201355 litre oil reservoir means a small volume increase in elemental particle count can indicate a large absolute quantity of wear material \u2014 reference baseline elemental levels must be established at the 150-hour first change while the unit is new and known good. Korea Ever-Power provides reference elemental baseline ranges for EP-SE417T3 units in the startup documentation package. With 40\u201355 litres of oil, the drain and refill time at the first change and subsequent changes should be planned as a standalone maintenance activity requiring 1.5\u20132.0 hours per unit for the drain-warm-refill cycle alone, not including the crane time if the unit must be repositioned for port access. Korea Ever-Power\u2019s dimensional drawing shows the port locations relative to the chassis bore orientation, allowing the maintenance team to confirm port access before scheduling the first-change maintenance window.<\/p>\n<\/div>\n

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Ot\u00e1zka<\/span>Is EP-SE417T3 a direct replacement for Rexroth GFT or Bonfiglioli 700C units in the 220,000 N\u00b7m class?<\/h3>\n

For triple-stage units in the 220,000 N\u00b7m torque class with ratio range overlapping i=123\u2013365, Korea Ever-Power provides a full dimensional cross-reference before any order \u2014 spindle bore diameter and fit class, drum OD, sprocket BCD, hydraulic port thread sizes and positions, motor interface spigot, brake pilot port \u2014 against your specific legacy model number and full suffix code. At 220,000 N\u00b7m, the Rexroth GFT and Bonfiglioli 700C families have specialised high-torque configurations, and the cross-reference confirms which EP-SE417T3 configuration matches the specific unit being replaced. Any dimension that does not match is flagged with 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-SE417T3 \u2014 Motor Selection, Brake Analysis, and Dimensional Fit Confirmed Before Order<\/h2>\n

Provide machine weight, gradient, required supplementary valve specification, motor circuit power, and incumbent drive model. Korea Ever-Power returns motor displacement for 3,000 rpm max, ratio from i=123\u2013365, combined spring brake and counterbalance valve adequacy, and dimensional match \u2014 same day, no charge.<\/p>\n

220,000 N\u00b7m \u00b7 i=123\u2013365 \u00b7 Triple-Stage T3 \u00b7 2,000 N\u00b7m brake (SE series max) \u00b7 >93% \u00b7 3,000 rpm max \u00b7 \u221225\u00b0C to +90\u00b0C \u00b7 ~1,450 kg<\/p>\n

Request Quote \u2014 EP-SE417T3 \u2192<\/a><\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
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\u2605 Five SE Series Records in a Single Unit: Torque, Brake, Weight, Ratio, Brake Equivalent<\/div>\n

From EP-SE415T3 track drive planetary gearbox (110,000 N\u00b7m, 1,200 N\u00b7m brake, 850 kg, i=215 max) to EP-SE417T3, every major specification increases by the largest single-step in the SE series history: torque doubles to 220,000 N\u00b7m (+100%), brake increases to 2,000 N\u00b7m (+67% \u2014 new SE series maximum), weight reaches 1,450 kg (+71%, +600 kg \u2014 largest single weight step in the series), and ratio range extends to i=365 maximum (the highest ratio in any SE unit on this site). At i=365, the 2,000 N\u00b7m spring brake produces 730,000 N\u00b7m effective output-side hold per drive \u2014 2.83\u00d7 higher than EP-SE415T3’s maximum of 258,000 N\u00b7m, and the highest brake equivalent in the full SE series as presented here. At 8.22 rpm output from a 3,000 rpm motor at i=365, this is also the slowest output speed in the SE series.<\/p>\n<\/div>","protected":false},"featured_media":850,"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-846","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\/sk\/wp-json\/wp\/v2\/product\/846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/comments?post=846"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/media\/850"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/media?parent=846"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/product_brand?post=846"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/product_cat?post=846"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/sk\/wp-json\/wp\/v2\/product_tag?post=846"}],"curies":[{"name":"pracovn\u00fd list","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}