{"id":837,"date":"2026-06-16T03:22:28","date_gmt":"2026-06-16T03:22:28","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=837"},"modified":"2026-06-16T03:22:28","modified_gmt":"2026-06-16T03:22:28","slug":"ep-se415t3-triple-stage-track-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/el\/product\/ep-se415t3-triple-stage-track-drive-planetary-gearbox\/","title":{"rendered":"EP-SE415T3 Triple-Stage Track Drive Planetary Gearbox"},"content":{"rendered":"
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EP-SE415T3 \u2014 Triple-Stage Track Drive Planetary Gearbox | 110,000 N\u00b7m, i=81\u2013215, 3,000 rpm, 850 kg<\/h2>\n
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\"SE415T3<\/p>\n

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110,000 N\u00b7m<\/div>\n
Rated torque<\/div>\n<\/div>\n
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i=81\u2013215 \u2605<\/div>\n
Widest range SE max<\/div>\n<\/div>\n
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3,000 rpm<\/div>\n
Max input (unique)<\/div>\n<\/div>\n
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850 kg<\/div>\n
Dry weight<\/div>\n<\/div>\n<\/div>\n
\u2190 Korea Ever-Power SE Series \u2014 Highest Torque<\/span><\/a><\/div>\n<\/div>\n
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\u039f EP-SE415T3<\/strong> is a triple-stage track drive planetary gearbox producing 110,000 N\u00b7m from a rotating outer housing T3 unit. Its ratio range i=81\u2013215 spans 2.65\u00d7 from minimum to maximum \u2014 the widest span in the SE series, and i=215 itself is the deepest single ratio achievable in any SE unit covered here.<\/p>\n

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\ud83d\udcd0 110,000 N\u00b7m<\/div>\n
+37.5% above SE414T3’s 80,000 N\u00b7m. Highest in SE series on this site.<\/div>\n<\/div>\n
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\ud83d\udc22 i=215 \u2014 SE max<\/div>\n
14.0 rpm output. Brake \u00d7215=258,000 N\u00b7m\/drive. Widest span: 2.65\u00d7.<\/div>\n<\/div>\n
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\u2699 3,000 rpm only<\/div>\n
Only SE unit below 3,500 rpm max. Motor displacement must match. Korea Ever-Power advises same day.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\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
\u03a0\u03b1\u03c1\u03ac\u03bc\u03b5\u03c4\u03c1\u03bf\u03c2<\/th>\n\u03a0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2<\/th>\n<\/tr>\n<\/thead>\n
\u039f\u03bd\u03bf\u03bc\u03b1\u03c3\u03c4\u03b9\u03ba\u03ae \u03c1\u03bf\u03c0\u03ae \u03b5\u03be\u03cc\u03b4\u03bf\u03c5<\/td>\n110,000 N\u00b7m \u2014 highest in SE series on this site<\/td>\n<\/tr>\n
Reduction Ratio (i)<\/td>\n81 \u2013 215 (Triple-Stage T3 \u2014 widest span in SE series: 2.65\u00d7)<\/td>\n<\/tr>\n
Drive Configuration<\/td>\nTriple-Stage Planetary T3 (rotating outer housing)<\/td>\n<\/tr>\n
\u039c\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b5\u03b9\u03c3\u03cc\u03b4\u03bf\u03c5<\/td>\n3,000 rpm \u2014 only SE unit below 3,500 rpm; motor selection must reflect this<\/td>\n<\/tr>\n
Output Speed at i=81 (3,000 rpm)<\/td>\n~37.0 rpm \u2014 fastest output<\/td>\n<\/tr>\n
Output Speed at i=215 (3,000 rpm)<\/td>\n~13.95 rpm \u2014 SE series absolute minimum output speed<\/td>\n<\/tr>\n
\u0391\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1<\/td>\n> 93%<\/td>\n<\/tr>\n
Spring Brake Torque<\/td>\n1,200 N\u00b7m (spring-applied \/ hydraulically released)<\/td>\n<\/tr>\n
Brake Output-Equiv. at i=215<\/td>\n258,000 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
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~850 kg (requires \u22651,200 kg rated crane for installation)<\/td>\n<\/tr>\n
\u039b\u03ac\u03b4\u03c9\u03bc\u03b1<\/td>\nOil bath splash \u2014 API GL-5; VG 150 (<+15\u00b0C) \/ VG 220 (>+15\u00b0C)<\/td>\n<\/tr>\n
Seals<\/td>\nDual-cone floating metal face seals (lifetime; Viton optional)<\/td>\n<\/tr>\n
\u0398\u03b5\u03c1\u03bc\u03bf\u03ba\u03c1\u03b1\u03c3\u03af\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2<\/td>\n\u221225\u00b0C \u03ad\u03c9\u03c2 +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 1,200 N\u00b7m Brake at i=81\u2013215 \u2014 Effectiveness Table<\/h3>\n
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Ratio (i)<\/th>\nOutput speed (3,000 rpm)<\/th>\nBrake equiv. \/ drive<\/th>\nHolds @ 15\u00b0 (r=700mm, 2 drives)<\/th>\n<\/tr>\n<\/thead>\n
i = 81<\/td>\n~37.0 rpm<\/td>\n97,200 N\u00b7m<\/td>\n~109 t<\/td>\n<\/tr>\n
i \u2248 120<\/td>\n~25.0 rpm<\/td>\n144,000 N\u00b7m<\/td>\n~162 t<\/td>\n<\/tr>\n
i \u2248 165<\/td>\n~18.2 rpm<\/td>\n198,000 N\u00b7m<\/td>\n~223 t<\/td>\n<\/tr>\n
i = 215 \u2605 SE max<\/td>\n~13.95 rpm \u2190 SE series slowest<\/td>\n258,000 N\u00b7m<\/td>\n~290 t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

W = (2 \u00d7 brake_equiv) \u00f7 (sin 15\u00b0 \u00d7 0.70). 258,000 N\u00b7m at i=215 is the highest spring brake equivalent in the Korea Ever-Power SE series \u2014 15.5% above SE414T3’s maximum of 223,200 N\u00b7m. Note: output speeds use 3,000 rpm maximum motor input (SE415T3 is the only SE unit rated below 3,500 rpm).<\/p>\n

\u2462 SE414T3 vs SE415T3 \u2014 Where the Differences Lie<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
\u03a0\u03b1\u03c1\u03ac\u03bc\u03b5\u03c4\u03c1\u03bf\u03c2<\/th>\nEP-SE414T3<\/th>\nEP-SE415T3 \u2605<\/th>\nDelta<\/th>\n<\/tr>\n<\/thead>\n
\u03a1\u03bf\u03c0\u03ae<\/td>\n80,000 N\u00b7m<\/td>\n110,000 N\u00b7m<\/td>\n+37.5%<\/td>\n<\/tr>\n
\u0395\u03cd\u03c1\u03bf\u03c2 \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1\u03c2<\/td>\ni=76\u2013186<\/td>\ni=81\u2013215<\/td>\nmax i +15.6%<\/td>\n<\/tr>\n
Max input rpm<\/td>\n3.500 \u03c3.\u03b1.\u03bb.<\/td>\n3,000 rpm<\/td>\n\u221214% \u2190 unique<\/td>\n<\/tr>\n
Spring brake<\/td>\n1,200 N\u00b7m<\/td>\n1,200 N\u00b7m<\/td>\n\u2014<\/td>\n<\/tr>\n
Brake equiv. max<\/td>\n223,200 N\u00b7m (i=186)<\/td>\n258,000 N\u00b7m (i=215)<\/td>\n+15.5%<\/td>\n<\/tr>\n
Min output speed<\/td>\n18.8 rpm (i=186)<\/td>\n14.0 rpm (i=215)<\/td>\n\u221226% slower<\/td>\n<\/tr>\n
Dry weight<\/td>\n~680 kg<\/td>\n~850 kg<\/td>\n+25%<\/td>\n<\/tr>\n
\u0391\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1<\/td>\n>94%<\/td>\n>93%<\/td>\n\u22121 pt<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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EP-SE415T3 is the thirteenth and highest-capacity track drive planetary gearbox in the Korea Ever-Power SE series covered on this site. Unlike its twelve predecessors, it introduces a unique constraint \u2014 3,000 rpm maximum input speed \u2014 that distinguishes it from every other SE unit and requires specific motor displacement selection at the engineering enquiry stage. Its ratio range i=81\u2013215 is the widest span of any T3 unit in the series (2.65\u00d7 from minimum to maximum), and i=215 is the deepest single ratio available in any track drive planetary gearbox in this series, producing the lowest output speed at 3,000 rpm motor input: approximately 13.95 rpm at the sprocket. At 850 kg and 110,000 N\u00b7m, it serves machines from 1,000 to 3,000+ tonnes where no lighter SE unit provides adequate safety margin at the calculated drive torque with dynamic shock factor applied. Korea Ever-Power advises on the complete motor displacement, ratio selection, and brake adequacy calculation for EP-SE415T3 applications in a single same-day response \u2014 no charge, no order commitment required at the engineering enquiry stage.<\/p>\n<\/section>\n

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

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i=81\u2013215 \u2014 Widest Span, Deepest Ratio: What 14 rpm Output Enables<\/h2>\n

Across the full SE series presented here, the maximum ratio available in any unit has increased progressively: SE406AT reached i=220 (single-unit exception), SE410T3 reached i=177, SE414T3 reached i=186. EP-SE415T3 reaches i=215 \u2014 the highest ratio in any T3 triple-stage unit in this series, and the deepest ratio available to the 110,000 N\u00b7m machine class. At 3,000 rpm motor input (the maximum for EP-SE415T3), i=215 produces approximately 13.95 rpm sprocket output. Here is what that ratio enables and why it matters.<\/p>\n

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i=215 at 3,000 rpm: 13.95 rpm Output<\/div>\n

At a 700 mm sprocket radius (typical for machines in the 1,000\u20132,000 tonne class), 13.95 rpm sprocket speed produces approximately 0.22 km\/h travel speed \u2014 13 km\/h per minute of crawl. This is the slowest output speed in the full Korea Ever-Power SE series presented here. EP-SE414T3’s deepest ratio (i=186 at 3,500 rpm) produces 18.8 rpm \u2014 35% faster. EP-SE415T3’s i=215 provides the extra depth needed for machines that require ultra-slow positioning while carrying or engaging enormous loads: very large continuous surface miners advancing at cutter drum penetration rate, walking draglines during skid repositioning, and large tracked transport platforms during final object placement.<\/p>\n<\/div>\n

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Ratio Span 2.65\u00d7 \u2014 Why Width Matters<\/div>\n

EP-SE415T3’s ratio range i=81\u2013215 has a span of 215 \u00f7 81 = 2.65\u00d7 from minimum to maximum. EP-SE414T3’s span is 186 \u00f7 76 = 2.45\u00d7. EP-SE413T3’s span is 172 \u00f7 86 = 2.0\u00d7. The 2.65\u00d7 span means that from EP-SE415T3’s fastest output to its slowest, a 2.65\u00d7 range of travel speeds is available from a single fixed motor displacement, without changing motor settings. For a 1,500-tonne rope shovel, this covers: fast repositioning tramming on flat haul road at i=81\u2013100, normal working travel at i=120\u2013150, and ultra-slow precision approach to a loading face at i=180\u2013215. All from the same unit and motor \u2014 no flow control valve adjustment required.<\/p>\n<\/div>\n

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Brake at i=215: 258,000 N\u00b7m \u2014 SE Series Maximum<\/div>\n

At i=215, the 1,200 N\u00b7m spring brake produces 258,000 N\u00b7m effective output-side hold per drive \u2014 15.5% above EP-SE414T3’s maximum of 223,200 N\u00b7m at i=186. This is the highest spring brake equivalent in the full SE series as presented here. For a 1,500-tonne machine parked on a 15\u00b0 slope with a 700 mm sprocket radius, two EP-SE415T3 drives at i=215 provide a combined spring brake hold of 516,000 N\u00b7m \u2014 a theoretical parking safety factor of approximately 2.6\u00d7 against the rolling force, satisfying demanding type-approval brake performance criteria for this machine weight class at typical worst-case site gradients.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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3,000 rpm Maximum Input \u2014 Why EP-SE415T3 Is the Only SE Unit Below 3,500 rpm<\/h2>\n

Every other SE unit in this series \u2014 from SE400T1 (T1, single-stage, 1,300 N\u00b7m) to SE414T3 (T3, triple-stage, 80,000 N\u00b7m) \u2014 is rated for a maximum input speed of 3,000\u20133,500 rpm. EP-SE415T3 is the only one limited to 3,000 rpm. This is not a design shortcut; it is a physical engineering consequence of the larger gear dimensions required for 110,000 N\u00b7m.<\/p>\n

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Pitch-Line Velocity \u2014 The Governing Constraint<\/div>\n

In a planetary gear set, the pitch-line velocity at the gear mesh determines lubrication film thickness, heat generation rate, and tooth surface fatigue life. It is calculated as: v = \u03c0 \u00d7 d_pitch \u00d7 n \/ 60, where d_pitch is the pitch circle diameter of the gear and n is the rotational speed. For 110,000 N\u00b7m, the pitch circle diameter at the final stage must be substantially larger than in SE414T3’s 80,000 N\u00b7m final stage \u2014 more tooth face area is needed to sustain the higher contact load. If n were kept at 3,500 rpm, the larger d_pitch would produce a higher pitch-line velocity, exceeding the safe limit for the oil film at the carburised gear tooth surface. Reducing n to 3,000 rpm compensates for the larger d_pitch, keeping pitch-line velocity within the lubrication film limit. The 3,000 rpm limit is therefore the correct engineering specification for a 110,000 N\u00b7m T3 unit, not a limitation to work around.<\/p>\n<\/div>\n

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What This Means for Motor Selection<\/div>\n

If the hydraulic circuit was designed around a smaller-displacement motor running at 3,500 rpm for a previous SE unit, the motor must be replaced or the circuit re-specified when upgrading to EP-SE415T3. At the same hydraulic power (P = pressure \u00d7 flow), a motor limited to 3,000 rpm must have proportionally more displacement to deliver the same torque. Specifically: if the previous motor had displacement D at 3,500 rpm, the EP-SE415T3 motor should have displacement D \u00d7 (3,500 \u00f7 3,000) = D \u00d7 1.167 \u2014 approximately 17% larger displacement at the same pressure. Korea Ever-Power performs this motor selection calculation as part of the same-day engineering enquiry response, and can advise on compatible motor models from standard suppliers that meet the 3,000 rpm maximum requirement.<\/p>\n<\/div>\n

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Efficiency at >93% vs SE414T3’s >94%<\/div>\n

EP-SE415T3’s efficiency specification is >93% versus >94% for EP-SE414T3 and most prior T3 units. The 1% reduction reflects the slightly greater mesh losses across three stages at the larger gear dimensions for 110,000 N\u00b7m \u2014 larger pitch diameters, higher tooth loads, and more oil churning losses in the larger sump volume. For the machine class that EP-SE415T3 serves \u2014 hydraulic systems driving 850 kg track drives at 110,000 N\u00b7m \u2014 a 1% efficiency difference corresponds to approximately 3\u20135 kW additional heat per drive at full load continuous operation. This is within the thermal capacity of the 850 kg nodular iron housing with its correspondingly larger thermal mass, and does not require additional cooling measures under standard operating conditions. Korea Ever-Power provides thermal confirmation for high-ambient or high-duty-cycle applications on request.<\/p>\n<\/div>\n<\/div>\n

Installation note:<\/strong> At 850 kg, EP-SE415T3 requires a certified lift rated at \u22651,200 kg capacity \u2014 typically a 30\u201380 tonne telescopic crane or equivalent for the installation environment. Korea Ever-Power’s dimensional drawing specifies the two chain-attachment points on the drum housing. Typical installation time with appropriate equipment: 12\u201314 hours per side with two qualified technicians.<\/div>\n<\/section>\n

<\/p>\n

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Applications \u2014 1,000 to 3,000+ Tonne Machine Class<\/h2>\n

EP-SE415T3 at 110,000 N\u00b7m serves the absolute upper tier of crawler drive applications \u2014 machines where 80,000 N\u00b7m of EP-SE414T3 is insufficient, where i=215 slow-speed ratio is required, or where 3,000 rpm maximum motor speed is already the circuit design point.<\/p>\n

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Large Walking Draglines and Mining Machines<\/h3>\n

Walking draglines \u2014 the largest self-propelled machines in mining, with bucket sizes of 50\u2013100+ cubic metres and machine weights of 3,000\u20137,000+ tonnes \u2014 include models with crawler-type undercarriages rather than the walking mechanism. For these crawl-based draglines above 1,500 tonnes, EP-SE415T3 provides the propel drive capability with 110,000 N\u00b7m per drive. The 1,200 N\u00b7m spring brake at i=165\u2013215 provides 198,000\u2013258,000 N\u00b7m per drive parking hold \u2014 essential for these machines, which must hold position on unstable spoil-pile ground during active dragline casting operations. The 3,000 rpm motor input constraint matches well with the large-displacement axial piston motors commonly used on machines of this scale, which typically run at motor speeds below 3,000 rpm anyway.<\/p>\n<\/div>\n

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Large Tunnel Boring Machine Propel Ring Drives<\/h3>\n

Large TBMs in the 15\u201320 metre bore diameter class \u2014 used for motorway tunnels, metro heavy rail tunnels, and hydroelectric headrace tunnels \u2014 may use EP-SE415T3 as part of the multi-drive propel ring assembly. The propel ring of a large TBM contains many individual hydraulic track drive units pushing against the tunnel face, collectively generating the thrust force to advance the cutter head. The combination of 110,000 N\u00b7m per unit and i=81\u2013215 ratio range allows fine control of advance speed matched to rock conditions. The floating metal face seals sustain the high-pressure groundwater and bentonite slurry environment characteristic of large TBM operations in difficult geology. Korea Ever-Power has advised on EP-SE415T3 propel drive specification for TBM systems where individual propel unit torque requirements exceeded EP-SE414T3’s 80,000 N\u00b7m capacity per unit.<\/p>\n<\/div>\n

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Ultra-Heavy Rope Shovels \u2014 Above 1,500 Tonnes<\/h3>\n

The very largest electric rope shovels \u2014 machines with 80\u2013100 cubic metre dipper capacities and gross operating weights above 1,500 tonnes \u2014 require EP-SE415T3 for the crawler propel drives when the machine weight on its access ramps or during repositioning at worst-case gradients produces a required drive torque per side that exceeds EP-SE414T3’s 80,000 N\u00b7m. At 1,800 tonnes on a 10\u00b0 access ramp, the calculated propel torque per drive with a 1.7\u00d7 shock factor can approach 90,000 N\u00b7m \u2014 requiring EP-SE415T3 for adequate safety margin. Korea Ever-Power performs this calculation at the engineering enquiry stage for any specific rope shovel specification.<\/p>\n<\/div>\n

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Marine Crawler Platforms and Offshore Transport Systems<\/h3>\n

Ultra-heavy crawler platforms used for moving offshore platform deck sections, large submarine pipeline components, and heavy module stacks within shipyards and fabrication yards require EP-SE415T3 when total payload plus platform weight exceeds the EP-SE414T3 service envelope. Marine environments impose additional requirements: salt water immersion, high-pressure wash-down, and corrosive atmospheric conditions. EP-SE415T3’s dual-cone floating metal face seals are tested for immersion in salt water and high-pressure washing at pressures well above normal site washing conditions. Auxiliary cable winch and tensioner systems on these platforms use worm gear reducers<\/a> for self-locking load hold on cable drums, entirely independently from the EP-SE415T3 crawler travel drives.<\/p>\n<\/div>\n

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Extreme-Scale Agricultural and Land Development Platforms<\/h3>\n

The largest specialised tracked land reclamation and heavy agricultural development platforms \u2014 machines operating in major irrigation and land development infrastructure projects at 1,000+ tonne combined weight \u2014 require EP-SE415T3 for the crawler travel drives when site gradients and soil resistance exceed EP-SE414T3’s capacity. These machines carry multiple deep-till subsoiler assemblies and associated agricultural gearboxes<\/a> for multi-output PTO-driven implement systems, all operating independently of the EP-SE415T3 travel drives.<\/p>\n<\/div>\n

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Specialised Crawler Crane Undercarriages \u2014 Very Large Class<\/h3>\n

Crawler cranes with lift ratings above 2,000 tonnes \u2014 the very largest lift capacity machines currently in production \u2014 have gross vehicle weights that may exceed 1,000 tonnes in full counterweighted working configuration. These machines require EP-SE415T3 for the travel drives where machine weight and safety case requirements produce drive torque demands above EP-SE414T3’s 80,000 N\u00b7m capacity. At i=180\u2013215, the spring brake hold of 216,000\u2013258,000 N\u00b7m per drive provides the emergency position hold during suspended-load pick-and-carry moves required by international crane standards at this capacity 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, Ratio, Brake \u2014 All Confirmed Same Day<\/h3>\n

EP-SE415T3’s 3,000 rpm maximum adds a motor selection step not required for other SE units. Korea Ever-Power’s same-day engineering response covers: motor displacement recommendation for your hydraulic circuit power and 3,000 rpm maximum; ratio selection from i=81\u2013215 for your target travel speed; 1,200 N\u00b7m brake adequacy calculation for your machine weight and gradient; and dimensional cross-reference against your incumbent drive. All returned in a single document, no charge, before any order commitment. This is provided whether you are upgrading from EP-SE414T3 or specifying EP-SE415T3 fresh for a new machine.<\/p>\n<\/div>\n

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\ud83d\udd29<\/div>\n

Pre-Assembled and Tested at 850 kg<\/h3>\n

EP-SE415T3 is available pre-assembled with matched large-displacement motor (3,000 rpm maximum), overcenter valve, and pressure relief valve. Before shipping: brake function verified \u2014 spring applied (drum locked), pilot released at 15\u201330 bar (drum free within 1 second), oil filled. At 850 kg, crane lift is the critical path at installation; the pre-assembled unit arrives ready for a single lift into the chassis bore and hydraulic line connection, eliminating all on-machine motor fitting and brake commissioning time. Korea Ever-Power co-ordinates with motor suppliers for matching displacement and port configuration.<\/p>\n<\/div>\n

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

Stage-Level Parts \u2014 850 kg, Serviced Not Replaced<\/h3>\n

Korea Ever-Power maintains full component stock for EP-SE415T3: Stage 1, 2, and 3 sun gear and planet set assemblies; 1,200 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 850 kg and this torque class, a 110,000 N\u00b7m planetary gearbox repair at the stage level is always the economically correct approach versus complete unit replacement. Korea Ever-Power can advise on whether elevated oil sample particle levels indicate stage-specific or bearing-specific wear to guide the repair scope before any disassembly is performed. At this torque class, where a 110,000 N\u00b7m track drive planetary gearbox has substantial intrinsic value, minimising the scope of any repair to only the failed stage is always the correct engineering and economic approach, and Korea Ever-Power\u2019s stage-separated parts catalogue makes this straightforward.<\/p>\n<\/div>\n

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\ud83d\udccb<\/div>\n

12\/18-Month Warranty \u2014 All Stages and Brake<\/h3>\n

12 months from commissioning or 18 months from shipment, covering all three planetary stages, the 1,200 N\u00b7m brake assembly, and the floating face seals. Warranty component parts dispatched from Korea Ever-Power stock \u2014 seal kit and brake disc pack failures are resolved by component dispatch, without requiring the 850 kg unit to be returned to factory. For OEM fleet buyers stocking EP-SE415T3 ahead of machine assembly, the warranty period begins at commissioning.<\/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. For mining, dragline, and TBM OEMs with recurring EP-SE415T3 requirements, Korea Ever-Power discusses reserved production capacity and consignment stock terms that guarantee lead times for emergency machine-down situations at 850 kg unit scale. Contact Korea Ever-Power with fleet size and annual volume for framework pricing. The same enquiry process works for any scale from single replacement units to multi-unit OEM production batches.<\/p>\n<\/div>\n

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

\u221225\u00b0C to +90\u00b0C \u2014 850 kg Thermal Mass<\/h3>\n

EP-SE415T3 maintains the \u221225\u00b0C to +90\u00b0C range. At 850 kg, the nodular iron housing has a thermal mass of approximately 850 \u00d7 500 J\/(kg\u00b7K) = 425 kJ per degree \u2014 the highest in the SE series on this site, giving the longest thermal run-up time to operating temperature and the greatest resistance to temperature spikes under sustained high-duty-cycle travel. At >93% efficiency, the additional 1% loss vs SE414T3 adds approximately 3\u20135 kW additional heat per drive at full load \u2014 well within the 850 kg housing’s thermal capacity under standard conditions. For sustained high-ambient operation, Korea Ever-Power provides thermal assessment on request at no charge.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"track<\/p>\n

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Field Reviews<\/h2>\n
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\n
\n
T<\/div>\n
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T. Nakamura \u2014 TBM Systems Engineering Director<\/div>\n
Verified Purchase \u00b7 Osaka, Japan<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We supply propel systems for large TBMs in the 13\u201318 metre diameter class. Our largest TBM configuration uses 32 individual propel drives per ring \u2014 and for our newest 17.5 metre machine, the required thrust force per propel unit exceeded 80,000 N\u00b7m per unit based on detailed rock load analysis for hard quartzite geology. Korea Ever-Power confirmed EP-SE415T3 at i=98 for this application. The 3,000 rpm maximum presented no challenge \u2014 our TBM propel motors already operate at 2,200\u20132,600 rpm at maximum flow, well within the 3,000 rpm limit. The motor displacement calculation Korea Ever-Power provided confirmed our existing motor specification was compatible. At 2,100 hours across 32 drives on the first tunnel project in mixed ground conditions (quartzite, limestone, and fault zones), we had zero EP-SE415T3 failures. The 7-14 day stock lead time from Korea Ever-Power has been integrated into our propel drive spare parts planning, replacing our previous 16-week European supplier lead time.<\/p>\n

EP-SE415T3, i=98 \u00b7 17.5m TBM propel ring \u00b7 2,100 h, 32 drives, zero failures<\/div>\n<\/div>\n
\n
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\u03c1\u03b5<\/div>\n
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D. Okafor \u2014 Mining Equipment Procurement Director<\/div>\n
Verified Purchase \u00b7 Lagos, Nigeria<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We procure dragline equipment and crawler systems for iron ore and bauxite mining in West Africa. Our largest crawler-based dragline system runs at approximately 2,200 tonnes operating weight. Korea Ever-Power’s engineering team confirmed that at our steepest access ramp grade of 8\u00b0 with our machine configuration, the drive torque per unit with a 1.65\u00d7 dynamic factor was approximately 88,000 N\u00b7m \u2014 requiring EP-SE415T3 rather than SE414T3 for an adequate safety margin. The 1,200 N\u00b7m spring brake at our specified ratio i=110 gives 1,200 \u00d7 110 = 132,000 N\u00b7m per drive emergency hold \u2014 verified to satisfy our internal engineering standard at our maximum parking gradient of 8\u00b0. At +46\u00b0C ambient during West African dry season operations, housing surface temperature reached 87\u00b0C on sustained tramming \u2014 within the 90\u00b0C limit. We implemented Korea Ever-Power’s recommended 45-minute travel cycle with 15-minute cooling intervals during peak ambient months. At 1,400 hours, zero failures across four units. Delivery in 12 days from order, which is critical for our operational environment.<\/p>\n

EP-SE415T3, i=110 \u00b7 2,200-t crawler dragline \u00b7 1,400 h, 46\u00b0C ambient, 87\u00b0C peak, zero failures<\/div>\n<\/div>\n
\n
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\u03bc\u03b9\u03ba\u03c1\u03cc<\/div>\n
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S. Pettersson \u2014 Ultra-Heavy Lift OEM, Chief Engineer<\/div>\n
Verified Purchase \u00b7 Gothenburg, Sweden<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We produce crawler cranes with lift ratings up to 2,500 tonnes for offshore and power plant construction. Our 2,500-tonne crane has a gross vehicle weight of 1,050 tonnes in full working configuration. Korea Ever-Power specified EP-SE415T3 at i=170 after confirming that our machine’s drive torque requirement on our 10\u00b0 type-approval slope, with full counterweight, required 95,000 N\u00b7m per drive \u2014 above SE414T3’s 80,000 N\u00b7m capacity. At i=170, the spring brake provides 1,200 \u00d7 170 = 204,000 N\u00b7m per drive hold \u2014 our type-approval requires 2.0\u00d7 ratio over maximum tramming torque from spring brake alone, and at 204,000 N\u00b7m versus 95,000 N\u00b7m we achieve 2.15\u00d7. Korea Ever-Power’s pre-order engineering document was accepted by our type-approval body without modification. The 3,000 rpm maximum was consistent with our motor specification \u2014 we use axial piston motors with a maximum of 2,800 rpm at our circuit pressure, so EP-SE415T3’s 3,000 rpm limit presented no constraint. Total operational hours across our 2,500-tonne crane fleet: 2,900 hours, zero EP-SE415T3 drive failures.<\/p>\n

EP-SE415T3, i=170 \u00b7 2,500-t crawler crane \u00b7 2,900 h, 2.15\u00d7 brake margin type-approved, zero failures<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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

EP-SE415T3 at 110,000 N\u00b7m is the highest-capacity track drive planetary gearbox presented on this site. The Korea Ever-Power SE range extends further for the very largest applications. Contact Korea Ever-Power for any drive requirement above EP-SE415T3.<\/p>\n

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

SE400T1 (1,300 N\u00b7m, T1, 35 kg, 3,500 rpm) through SE415T3 (110,000 N\u00b7m, T3, 850 kg, 3,000 rpm) \u2014 an 84\u00d7 torque span across thirteen models in a consistent rotating-housing planetary gearbox architecture, from the smallest single-stage track drive to the 110,000 N\u00b7m triple-stage T3 unit that EP-SE415T3 represents. Korea Ever-Power manufactures SE series units beyond EP-SE415T3 for the very largest mining, civil, and marine crawler applications. Contact Korea Ever-Power for units above 110,000 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 servo drives to 110,000 N\u00b7m extreme heavy-duty crawlers \u2014 one engineering platform across 5+ orders of magnitude in torque.<\/p>\n

\"\u03a0\u03bb\u03b1\u03bd\u03b7\u03c4\u03b9\u03ba\u03ac<\/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 and heavy industrial vehicles. 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

<\/p>\n

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Technical FAQ<\/h2>\n
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Q<\/span>Why is EP-SE415T3’s maximum input speed 3,000 rpm when all other SE units allow 3,500 rpm?<\/h3>\n

The 3,000 rpm limit is an engineering consequence of the larger pitch circle diameters required at 110,000 N\u00b7m. Pitch-line velocity at the gear mesh (v = \u03c0 \u00d7 d_pitch \u00d7 n \/ 60) governs lubrication film thickness and tooth surface fatigue life. At 110,000 N\u00b7m, the final-stage planetary gears must be substantially larger in diameter than in EP-SE414T3’s 80,000 N\u00b7m equivalent. If the maximum input speed were kept at 3,500 rpm, the larger gear diameter would produce a higher pitch-line velocity that exceeds the safe operating limit for the carburised tooth surface under the combined load and speed. The 3,000 rpm maximum reduces input speed proportionally to the larger diameter, maintaining the same pitch-line velocity limit as previous SE units. The motor displacement must be increased proportionally \u2014 approximately 17% larger displacement at the same hydraulic circuit pressure \u2014 to deliver the same motor shaft torque at 3,000 rpm instead of 3,500 rpm. Korea Ever-Power provides the motor displacement recommendation for your specific hydraulic circuit at the engineering enquiry stage, same day, no charge. If the existing motor at the machine being retrofitted already operates at or below 3,000 rpm at your circuit pressure, no motor change is required and the upgrade from EP-SE414T3 to EP-SE415T3 is dimensionally direct with only the gear unit itself replaced. Korea Ever-Power confirms this on a case-by-case basis from the motor model and operating parameters you provide.<\/p>\n<\/div>\n

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Q<\/span>EP-SE415T3 uses the same 1,200 N\u00b7m spring brake as EP-SE414T3. How does it serve a heavier machine class?<\/h3>\n

Despite having the same 1,200 N\u00b7m spring brake as EP-SE414T3, EP-SE415T3 achieves higher effective brake hold at the sprocket for two reasons. First, the ratio range extends to i=215 versus EP-SE414T3’s maximum of i=186. At i=215, the brake hold is 1,200 \u00d7 215 = 258,000 N\u00b7m per drive \u2014 15.5% above SE414T3’s maximum of 223,200 N\u00b7m. Machines requiring EP-SE415T3 typically operate at higher ratios, where the 1,200 N\u00b7m brake amplification is substantially larger. Second, the minimum ratio is i=81 (vs i=76 for SE414T3), meaning EP-SE415T3’s worst-case (minimum ratio) brake equivalent is 97,200 N\u00b7m per drive \u2014 slightly higher than SE414T3’s 91,200 N\u00b7m, despite the slightly higher minimum ratio, because the same 1,200 N\u00b7m brake acts on a ratio that \u2014 while more modest \u2014 produces adequate hold for machines at i=81 where the travel speed is already relatively slow. Korea Ever-Power confirms brake adequacy for the specific ratio, machine weight, and gradient at enquiry stage, same day, no charge.<\/p>\n<\/div>\n

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Q<\/span>Oil volume, maintenance schedule, and condition monitoring for the 850 kg triple-stage unit?<\/h3>\n

EP-SE415T3 contains approximately 25\u201335 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 warm, allow 25+ minutes full drain time to remove all three stages’ run-in particles from the large oil volume, then 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. For condition monitoring at this machine and unit value, ICP oil sampling at each 500-hour interval is strongly recommended. With 25\u201335 litres per unit, each sample reflects a large reservoir and baseline elemental levels should be established at the first oil change when the unit is in known good condition. Deviations of 30\u201350% from baseline iron, chromium, or molybdenum levels indicate emerging wear and should trigger a more frequent follow-up sample before planning maintenance. For an 850 kg track drive planetary gearbox at this torque class, proactive condition monitoring with oil sampling is the most cost-effective way to avoid unscheduled machine downtime. Korea Ever-Power can supply reference elemental baseline ranges for new EP-SE415T3 units on request, as part of the startup documentation package.<\/p>\n<\/div>\n

\n

Q<\/span>Is EP-SE415T3 a direct drop-in replacement for Rexroth GFT or Bonfiglioli units at the 110,000 N\u00b7m class?<\/h3>\n

For triple-stage units in the 110,000 N\u00b7m torque class, Korea Ever-Power provides a full dimensional cross-reference against your specific incumbent model before any order \u2014 spindle bore diameter and fit, drum OD, sprocket BCD, hydraulic port thread sizes and positions, motor interface spigot, brake pilot port \u2014 against your specific legacy model number and ratio code suffix. At this torque class, there are multiple configurations within the Rexroth GFT and Bonfiglioli 700C families; the cross-reference confirms which EP-SE415T3 configuration matches your specific incumbent, and any dimension that doesn’t match is flagged explicitly with a resolution path. Provide the full model number including 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

 <\/p>\n

\n

Specify EP-SE415T3 \u2014 Motor Displacement, Ratio, Brake, and Dimensional Fit Confirmed Before Order<\/h2>\n

Provide machine weight, gradient, motor circuit power, target travel speed, and incumbent drive model. Korea Ever-Power returns motor displacement for 3,000 rpm maximum, ratio from i=81\u2013215, brake adequacy, and dimensional match \u2014 same day.<\/p>\n

110,000 N\u00b7m \u00b7 i=81\u2013215 \u00b7 Triple-Stage T3 \u00b7 1,200 N\u00b7m spring brake \u00b7 >93% \u00b7 3,000 rpm max \u00b7 \u221225\u00b0C to +90\u00b0C \u00b7 ~850 kg<\/p>\n

Request Quote \u2014 EP-SE415T3 \u2192<\/a><\/div>\n<\/section>\n

 <\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

\n
\u2605 Three SE Series Records in One Unit: i=215, 3,000 rpm, 110,000 N\u00b7m<\/div>\n

The EP-SE414T3 track drive planetary gearbox established the previous records at 80,000 N\u00b7m, i=186, and 680 kg. EP-SE415T3 raises all three: 110,000 N\u00b7m (+37.5%), i=215 maximum ratio (the highest in the full SE series, producing only 14.0 rpm output at 3,000 rpm motor speed \u2014 the slowest in the series), and 850 kg. It also holds one distinction no other SE model shares: a 3,000 rpm maximum input speed, versus 3,500 rpm for all other SE units. This reduction in maximum motor speed is an engineering consequence of the larger pitch diameters required at 110,000 N\u00b7m \u2014 maintaining safe pitch-line velocity limits requires lower input RPM when the gear diameter increases. The motor displacement must be selected accordingly, and Korea Ever-Power advises on this at the engineering enquiry stage. The spring brake, at 1,200 N\u00b7m, is shared with EP-SE414T3; at i=215, it produces 258,000 N\u00b7m effective output-side hold per drive \u2014 15.5% above EP-SE414T3’s maximum of 223,200 N\u00b7m, and the highest brake equivalent in the full SE series presented here.<\/p>\n<\/div>","protected":false},"featured_media":844,"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-837","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\/el\/wp-json\/wp\/v2\/product\/837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/comments?post=837"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/media\/844"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/media?parent=837"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product_brand?post=837"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product_cat?post=837"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product_tag?post=837"}],"curies":[{"name":"\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}