{"id":836,"date":"2026-06-16T03:11:46","date_gmt":"2026-06-16T03:11:46","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=836"},"modified":"2026-06-16T03:22:54","modified_gmt":"2026-06-16T03:22:54","slug":"ep-se414t3-triple-stage-track-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/nl\/product\/ep-se414t3-triple-stage-track-drive-planetary-gearbox\/","title":{"rendered":"EP-SE414T3 Triple-Stage Track Drive Planetary Gearbox"},"content":{"rendered":"

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EP-SE414T3 \u2014 Triple-Stage Track Drive Planetary Gearbox<\/h2>\n
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80,000 N\u00b7m<\/div>\n
Rated torque<\/div>\n<\/div>\n
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1,200 N\u00b7m \u2605<\/div>\n
Spring brake max<\/div>\n<\/div>\n
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i=76\u2013186<\/div>\n
Widest SE range<\/div>\n<\/div>\n
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680 kg<\/div>\n
+260 kg vs SE413T3<\/div>\n<\/div>\n<\/div>\n
\u2190 Korea Ever-Power SE Series Ultimate Model<\/span><\/a><\/div>\n<\/div>\n
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De EP-SE414T3<\/strong> is a triple-stage track drive planetary gearbox rated at 80,000 N\u00b7m \u2014 the highest torque in the Korea Ever-Power SE series covered on this site. With a ratio range of i=76\u2013186 that extends wider than any previous SE model on both ends, and a spring brake at 1,200 N\u00b7m that nearly doubles EP-SE413T3’s 610 N\u00b7m, it serves the 750\u20131,500+ tonne machine class exclusively.<\/p>\n

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\ud83d\udcd0 80,000 N\u00b7m T3<\/div>\n
+33% above SE413T3 in the same T3 rotating-housing architecture at 680 kg.<\/div>\n<\/div>\n
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\ud83d\uded1 1,200 N\u00b7m brake<\/div>\n
\u00d7i=186 = 223,200 N\u00b7m\/drive. Largest step and highest value in the SE series.<\/div>\n<\/div>\n
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\ud83d\udccf i=76\u2013186 widest<\/div>\n
Lower minimum AND higher maximum than SE413T3. Widest ratio span in the SE series.<\/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
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Parameter<\/th>\nSpecificatie<\/th>\n<\/tr>\n<\/thead>\n
Nominaal uitgangskoppel<\/td>\n80,000 N\u00b7m \u2014 highest in the SE series<\/td>\n<\/tr>\n
Reduction Ratio (i)<\/td>\n76 \u2013 186 (Triple-Stage T3 \u2014 widest range in SE series)<\/td>\n<\/tr>\n
Drive Configuration<\/td>\nTriple-Stage Planetary T3 (rotating outer housing)<\/td>\n<\/tr>\n
Max Input Speed<\/td>\n3,500 rpm<\/td>\n<\/tr>\n
Output Speed at i=76 (3,500 rpm)<\/td>\n~46.1 rpm \u2014 fastest output in this unit<\/td>\n<\/tr>\n
Output Speed at i=186 (3,500 rpm)<\/td>\n~18.8 rpm \u2014 slowest output, deepest ratio in the SE series<\/td>\n<\/tr>\n
Effici\u00ebntie<\/td>\n> 94%<\/td>\n<\/tr>\n
Spring Brake Torque<\/td>\n1,200 N\u00b7m (spring-applied \/ hydraulically released) \u2014 SE series maximum, nearly 2\u00d7 SE413T3<\/td>\n<\/tr>\n
Brake Output-Equiv. at i=186<\/td>\n223,200 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
Behuizingsmateriaal<\/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~680 kg (+260 kg vs SE413T3 \u2014 requires \u22651,000 kg rated lift)<\/td>\n<\/tr>\n
Smering<\/td>\nOil bath splash \u2014 API GL-5; VG 150 (<+15\u00b0C) \/ VG 220 (>+15\u00b0C)<\/td>\n<\/tr>\n
Zeehonden<\/td>\nDual-cone floating metal face seals (lifetime)<\/td>\n<\/tr>\n
Bedrijfstemperatuur<\/td>\n\u221225\u00b0C to +90\u00b0C (Viton seals available)<\/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=76\u2013186 \u2014 Full Effectiveness Table<\/h3>\n
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Ratio (i)<\/th>\nOutput speed (3,500 rpm)<\/th>\nBrake equiv. \/ drive<\/th>\nHolds @ 15\u00b0 (r=650mm, 2 drives)<\/th>\n<\/tr>\n<\/thead>\n
i = 76<\/td>\n~46.1 rpm<\/td>\n91,200 N\u00b7m<\/td>\n~111 t<\/td>\n<\/tr>\n
i \u2248 110<\/td>\n~32 rpm<\/td>\n132,000 N\u00b7m<\/td>\n~160 t<\/td>\n<\/tr>\n
i \u2248 150<\/td>\n~23 rpm<\/td>\n180,000 N\u00b7m<\/td>\n~218 t<\/td>\n<\/tr>\n
i = 186 \u2605 max<\/td>\n~18.8 rpm<\/td>\n223,200 N\u00b7m<\/td>\n~270 t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

W = (2 \u00d7 brake_equiv) \u00f7 (sin 15\u00b0 \u00d7 0.65). 223,200 N\u00b7m at i=186 is the highest spring brake equivalent in the SE series \u2014 2.13\u00d7 SE413T3’s maximum (104,920 N\u00b7m at i=172). At the minimum ratio i=76, the effective brake hold is still 91,200 N\u00b7m per drive \u2014 74% above EP-SE413T3’s minimum-ratio brake equivalent of 52,460 N\u00b7m.<\/p>\n

\u2462 SE413T3 vs SE414T3 \u2014 Parameter Comparison<\/h3>\n
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Parameter<\/th>\nEP-SE413T3<\/th>\nEP-SE414T3 \u2605<\/th>\nStep<\/th>\n<\/tr>\n<\/thead>\n
Koppel<\/td>\n60,000 N\u00b7m<\/td>\n80,000 N\u00b7m<\/td>\n+33%<\/td>\n<\/tr>\n
Ratio range<\/td>\ni=86\u2013172<\/td>\ni=76\u2013186<\/td>\n\u221210 low, +14 high<\/td>\n<\/tr>\n
Spring brake<\/td>\n610 N\u00b7m<\/td>\n1,200 N\u00b7m<\/td>\n+97% \u2190 SE series record<\/td>\n<\/tr>\n
Brake max equiv.<\/td>\n104,920 N\u00b7m\/drive<\/td>\n223,200 N\u00b7m\/drive<\/td>\n\u00d72.13<\/td>\n<\/tr>\n
Dry weight<\/td>\n~420 kg<\/td>\n~680 kg<\/td>\n+62% \u2190 SE series record<\/td>\n<\/tr>\n
Machine class<\/td>\n500\u2013700+ t<\/td>\n750\u20131,500+ t<\/td>\nNext tier<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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1,200 N\u00b7m Spring Brake \u2014 Why This Step Is Categorically Different From All Previous SE Increments<\/h2>\n

Across the Korea Ever-Power SE series spring brake sequence \u2014 130, 270, 280, 430, 530, 610 N\u00b7m \u2014 each step was an increment of 50 to 160 N\u00b7m. The step from EP-SE413T3 to EP-SE414T3 is 590 N\u00b7m, nearly doubling the brake torque in a single model step. This is not an arbitrary engineering decision; each of the following four factors independently justified a substantially larger brake assembly at this torque and weight class.<\/p>\n

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Factor 1: The 680 kg Housing Imposes Greater Inertia<\/div>\n

EP-SE414T3 weighs 680 kg \u2014 260 kg (62%) more than EP-SE413T3. During a hydraulic pressure failure event, this rotating housing mass continues to carry kinetic energy that the spring brake must arrest. A 62% heavier rotating assembly requires proportionally more spring braking force to stop and hold within the same deceleration distance. Korea Ever-Power engineers the brake to halt the housing within a defined rotation angle at maximum design speed \u2014 a constraint that scales directly with rotating mass. The larger brake piston, heavier disc stack, and stronger Belleville spring pack in EP-SE414T3 are sized to satisfy this stopping criterion for the 680 kg assembly, not just to hold the machine on a gradient.<\/p>\n<\/div>\n

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Factor 2: Parking Hold at i=76 With 750\u20131,500 t Machine Class<\/div>\n

EP-SE414T3’s minimum ratio is i=76 \u2014 the lowest minimum ratio in any T3 SE unit. At i=76, the brake amplification is at its minimum within this unit’s operating range. For a 1,000-tonne machine parked on a 15\u00b0 bench with a 650 mm sprocket radius, the required parking hold per drive is approximately 37,800 N\u00b7m. With a 610 N\u00b7m brake (SE413T3 level), the effective hold at i=76 would be 610 \u00d7 76 = 46,360 N\u00b7m \u2014 a safety factor of only 1.23\u00d7. Korea Ever-Power’s engineering standard requires a minimum 2.0\u00d7 parking safety factor for machines in this weight class, which requires a brake torque of at least 1,000 N\u00b7m to achieve 76,000 N\u00b7m hold at i=76. The 1,200 N\u00b7m brake provides 91,200 N\u00b7m at i=76 \u2014 a 2.4\u00d7 factor, satisfying the requirement with margin.<\/p>\n<\/div>\n

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Factor 3: Larger Brake Piston Area for the Same 15\u201330 Bar Release<\/div>\n

Despite the brake torque nearly doubling from 610 N\u00b7m to 1,200 N\u00b7m, the hydraulic release pressure remains unchanged at 15\u201330 bar \u2014 the same as every other SE model. This is possible only by increasing the brake piston area proportionally to the increased spring force. A larger piston generates more hydraulic force from the same pressure, compressing stronger springs. In EP-SE414T3, the brake piston diameter and disc pack outer diameter are physically larger than in EP-SE413T3. The multi-disc pack contains more friction discs (larger stack height) and correspondingly larger sintered steel separator plates. This larger brake assembly is one of the contributions to the 260 kg weight increase from EP-SE413T3 \u2014 Korea Ever-Power estimates the brake assembly alone accounts for approximately 40\u201370 kg of the 260 kg total increase.<\/p>\n<\/div>\n

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Factor 4: Emergency Braking in the 750\u20131,500 t Machine Safety Case<\/div>\n

For machines above 750 tonnes, regulatory and OEM type-approval requirements for emergency brake performance are more stringent than for lighter equipment. In a rope shovel or large mining excavator, a hydraulic failure during travel on a mine bench \u2014 where machines may travel at maximum speed near a bench edge \u2014 requires the spring brake to stop the machine within a defined distance. The safety case for these machines requires a higher brake torque-to-machine-weight ratio than lighter SE units. Korea Ever-Power verifies brake stopping performance for each specific machine weight and maximum travel speed at the engineering enquiry stage, and EP-SE414T3 is designed to satisfy the most demanding type-approval requirements in this weight class with the 1,200 N\u00b7m spring brake specification.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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680 kg \u2014 The Largest Single Weight Increase in the SE Series<\/h2>\n

The Korea Ever-Power SE series weight progression from SE400T1 (35 kg) to SE413T3 (420 kg) spans 385 kg across ten models \u2014 an average increase of approximately 43 kg per model step. Three consecutive models \u2014 SE406BT3 (24,000 N\u00b7m), SE410T3 (50,000 N\u00b7m), and SE413T3 (60,000 N\u00b7m) \u2014 all weigh approximately 420 kg. EP-SE414T3 then adds 260 kg in a single step to reach 680 kg. This single increment is 67% of all the weight added across the previous nine model steps combined. Four engineering factors explain it.<\/p>\n

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Brake Assembly: ~40\u201370 kg of the 260 kg increase<\/div>\n

The 1,200 N\u00b7m brake assembly \u2014 its enlarged piston, extended disc stack (more friction and separator discs), heavier Belleville spring pack, and larger brake housing bore \u2014 is physically bigger and heavier than the 610 N\u00b7m brake in EP-SE413T3. Larger pistons require thicker housing walls around the bore. The brake alone contributes an estimated 40\u201370 kg to the total weight increase.<\/p>\n<\/div>\n

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Gear Sets for 80,000 N\u00b7m: ~120\u2013150 kg of the increase<\/div>\n

The jump from 60,000 N\u00b7m (SE413T3) to 80,000 N\u00b7m (SE414T3) is a 33% torque increase. In the final stage, planet gear tooth face width must scale with torque \u2014 wider faces mean heavier gears, heavier carriers, and a wider ring gear. The final-stage gear set and housing cross-section growth accounts for the largest single contribution to the 260 kg increase, estimated at 120\u2013150 kg across all three stages.<\/p>\n<\/div>\n

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i=76 Stage Configuration: Wider Ratio Adds Housing Length<\/div>\n

EP-SE414T3’s ratio range extends to i=76 at the low end (vs i=86 for SE413T3). Reaching a lower minimum ratio while also achieving 80,000 N\u00b7m requires a different three-stage ratio split than SE413T3’s configuration. The stage 1 ratio is set lower to cover the i=76 requirement, and the intermediate stage compensates \u2014 this ratio reconfiguration may require larger stage 1 sun and ring gear diameters, adding housing diameter and mass for this stage specifically.<\/p>\n<\/div>\n

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Bearings for 750\u20131,500 t Loads: ~20\u201330 kg contribution<\/div>\n

A 1,000-tonne machine imposes approximately 500+ kN of combined radial and axial bearing load at the drum-spindle interface \u2014 substantially greater than the 250\u2013300 kN range that EP-SE413T3’s bearings handle. The taper roller bearings at this interface must be physically larger in bore, width, and roller length, requiring a larger bearing housing bore and more surrounding metal in the spindle flange. Bearing-driven housing changes add an estimated 20\u201330 kg.<\/p>\n<\/div>\n<\/div>\n

At 680 kg, EP-SE414T3 requires a certified lift rated at \u22651,000 kg for installation \u2014 typically a 20\u201350 tonne telescopic crane or equivalent. Korea Ever-Power’s dimensional drawing specifies the two chain-attachment points on the drum housing for balanced crane lifting. Installation time with appropriate equipment: approximately 10\u201312 hours per side by two qualified technicians. Korea Ever-Power supplies lifting specifications in the installation documentation shipped with each unit.<\/div>\n<\/section>\n

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Applications \u2014 750 to 1,500+ Tonne Machine Class<\/h2>\n

This track drive planetary gearbox serves the uppermost tier of crawler machine weight \u2014 where 60,000 N\u00b7m of EP-SE413T3 is insufficient, where the 1,200 N\u00b7m spring brake’s 223,200 N\u00b7m output-side hold is required for emergency safety, and where 80,000 N\u00b7m rated capacity provides the engineering margin that operations above 750 tonnes demand.<\/p>\n

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

Large electric rope shovels \u2014 machines with operating weights of 800\u20131,400 tonnes and dipper capacities exceeding 60\u2013100 cubic metres \u2014 require EP-SE414T3 for the propel drive units. The rope shovel’s travel cycle is intermittent but demands maximum tractive force when repositioning on soft mine floor, pushing through muck piles, or climbing bench access ramps. At 1,000+ tonnes on a 10\u00b0 access ramp, the calculated required drive torque exceeds EP-SE413T3’s 60,000 N\u00b7m capacity. EP-SE414T3 at i=100\u2013140 serves these machines with the 80,000 N\u00b7m capacity needed to clear the 1.5\u20132.0\u00d7 dynamic factor for rope shovel tramming on uneven mine floor. The 1,200 N\u00b7m spring brake at i=120\u2013140 provides 144,000\u2013168,000 N\u00b7m per drive \u2014 the emergency hold for pressure failure on a ramp during tramming.<\/p>\n<\/div>\n

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Super-Heavy Crawler Cranes \u2014 1,000+ Tonne Lift Class<\/h3>\n

Crawler cranes with rated lift capacities above 1,000 tonnes \u2014 used for offshore jacket installation, refinery reactor vessel lifts, and heavy industrial module erection \u2014 have gross vehicle weights that can exceed 800 tonnes in full working configuration. These machines require EP-SE414T3 for the travel undercarriage drives, where machine weight, surface conditions (typically concrete or steel plate on prepared ground), and the mandatory safety case for travel with suspended load converge. The 1,200 N\u00b7m spring brake at i=150\u2013186 provides 180,000\u2013223,200 N\u00b7m per drive \u2014 the mechanical position hold for emergency conditions during a suspended-load positioning move, required by crane type-approval regulations in all major markets.<\/p>\n<\/div>\n

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Large Mining Draglines \u2014 Undercarriage Propel Drives<\/h3>\n

Walking draglines (where the machine is self-propelled via a walking mechanism rather than crawler tracks) represent one end of the scale, while large crawler-mounted draglines at the lighter end of the 750\u20131,500 tonne class can use EP-SE414T3 for the crawler propel drives. These machines perform infrequent tramming moves between mining panels, but when they do, the full machine weight must be moved over uneven mine floor with low rolling resistance coefficients. The 80,000 N\u00b7m capacity per drive provides the sustained tractive effort for these high-weight, intermittent-travel machine propel requirements that EP-SE413T3 cannot meet with adequate safety margin.<\/p>\n<\/div>\n

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Ultra-Heavy Specialised Industrial Transport<\/h3>\n

Tracked heavy transport platforms for loads above 1,000 tonnes \u2014 nuclear reactor pressure vessels, large offshore module sections, bridge girders, and LNG plant process modules \u2014 require EP-SE414T3 at high ratios (i=150\u2013186) for the crawler travel drives. Travel speed is measured in metres per minute, but the tractive force requirement scales with total combined weight. The spring brake at i=186 provides 223,200 N\u00b7m per drive \u2014 the emergency position hold for a hydraulic failure during a critical heavy transport move where uncontrolled movement is not acceptable under any circumstances. Auxiliary winch and tensioner systems on these platforms use worm gear reducers<\/a> for cable drum self-locking hold, independent of the EP-SE414T3 travel drive spring brake circuit.<\/p>\n<\/div>\n

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Heavy Agricultural Land Preparation \u2014 Largest Scale<\/h3>\n

The largest specialised tracked land-clearing and deep-till platforms at the extreme end of commercial agricultural land development \u2014 machines operating on newly converted tropical agricultural land where root systems, organic matter, and waterlogged subsoils impose maximum resistance \u2014 may reach the 750+ tonne operating weight class when combined with heavy attached implements. EP-SE414T3 provides the track propel drives for these machines, while the associated multi-output agricultural gearboxes<\/a> for the land-clearing cutting rotors and deep-till subsoiler assemblies operate on separate PTO power circuits from the EP-SE414T3 travel drives.<\/p>\n<\/div>\n

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Tunnel Boring Machine Backup Gantry and Launch Systems<\/h3>\n

Large tunnel boring machines in the 10\u201315 metre diameter class carry backup gantry systems of 800\u20131,200 tonnes that follow the cutter head on crawler tracks in the tunnel. These gantries carry power, ventilation, segment erection equipment, and spoil removal conveyors. The crawler propel drives for the heaviest gantry systems, particularly in mixed-ground TBMs where gantry travel resistance varies significantly, may require EP-SE414T3 at i=100\u2013140 for the tractive force capacity with the required safety margin. The 1,200 N\u00b7m brake provides the emergency hold in the confined tunnel environment where uncontrolled rolling of a 1,000-tonne gantry would be catastrophic.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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i=76\u2013186 \u2014 Wider Than SE413T3 on Both Ends: What the Extended Range Enables<\/h2>\n

EP-SE413T3’s ratio range is i=86\u2013172. EP-SE414T3’s range is i=76\u2013186 \u2014 extending 10 steps lower at the fast end and 14 steps higher at the slow end. For an upscaling step that increases torque by 33%, this wider range on both ends is notable and reflects the specific requirements of the 750\u20131,500 tonne machine class.<\/p>\n

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i=76 \u2014 Fast End: Why Lower Than SE413T3’s i=86?<\/div>\n

EP-SE413T3’s minimum ratio i=86 corresponds to approximately 40.7 rpm at 3,500 rpm motor input \u2014 suitable for the 500\u2013700 tonne class. EP-SE414T3’s minimum ratio i=76 corresponds to approximately 46.1 rpm \u2014 approximately 13% faster than SE413T3’s maximum speed. The larger 750\u20131,500 tonne machines served by EP-SE414T3 include rope shovels and large draglines that may need faster tramming speed on flat mine haul access despite their greater mass. A rope shovel tramming between positions on a level haul road needs a lower ratio (higher speed) than the same machine climbing a 12\u00b0 ramp to a new mining panel \u2014 EP-SE414T3’s i=76 provides the fast tramming option that the machine’s operational cycle requires.<\/p>\n<\/div>\n

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i=186 \u2014 Slow End: The Deepest Ratio in the SE Series<\/div>\n

At i=186, a 3,500 rpm motor drives the sprocket at approximately 18.8 rpm \u2014 the slowest output speed in the entire SE series as presented here, 7% slower than SE413T3’s deepest ratio at i=172 (20.3 rpm). At a 650 mm sprocket radius, i=186 produces approximately 0.29 km\/h. This ultra-low speed is required for the heaviest tracked transport platforms during critical precision positioning \u2014 reactor vessel placement, module final alignment \u2014 where the positioning tolerance is measured in millimetres and the machine weight exceeds 1,000 tonnes. At this speed, hydraulic motor speed is low enough for precise flow control without pressure-compensated servo valves in the travel circuit, simplifying the hydraulic system design.<\/p>\n<\/div>\n

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Span of i=76\u2013186: 2.45\u00d7 vs SE413T3’s 2.0\u00d7<\/div>\n

The ratio of maximum to minimum ratio (span) within each unit’s range tells the engineer how wide the speed control band is without changing motor displacement. EP-SE413T3: 172 \u00f7 86 = 2.0\u00d7. EP-SE414T3: 186 \u00f7 76 = 2.45\u00d7. This 22% wider speed control band in EP-SE414T3 reflects the more varied operational requirements of the 750\u20131,500 tonne machine class \u2014 machines that need both faster repositioning tramming and slower precision positioning than the 500\u2013700 tonne class, covered by a single ratio selection at order. Korea Ever-Power selects the specific ratio from i=76\u2013186 based on the machine’s target travel speed and tractive force requirement, returning the recommendation same day.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Why Korea Ever-Power<\/h2>\n

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\ud83d\udcd0<\/div>\n

Torque, Brake, and Ratio Confirmed Same Day<\/h3>\n

Provide machine gross weight, maximum gradient, target travel speed, motor specification, and incumbent drive model. Korea Ever-Power returns: ratio from i=76\u2013186 for kinematic match; brake adequacy calculation (1,200 N\u00b7m \u00d7 ratio vs your parking and emergency stopping requirement, including safety factor); and dimensional cross-reference \u2014 spindle bore, drum OD, sprocket BCD, motor spigot, brake pilot port \u2014 same business day, no charge. At 680 kg unit scale, this pre-order engineering confirmation eliminates costly installation errors on a machine where a 30-minute installation error requires a 50-tonne crane return to site.<\/p>\n<\/div>\n

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\ud83d\udd29<\/div>\n

Pre-Assembled and Brake-Verified at 680 kg<\/h3>\n

Korea Ever-Power supplies EP-SE414T3 pre-assembled with matched hydraulic motor, overcenter valve, and pressure relief valve. Before shipping: the 1,200 N\u00b7m brake is function-tested at the rated pilot pressure \u2014 pilot applied (drum rotates freely), pilot released (drum locks within 1 second), oil filled to level. At 680 kg, on-machine brake commissioning would require the crane to hold the unit in position during testing; Korea Ever-Power’s pre-shipment brake verification eliminates this requirement entirely. The unit arrives ready for single crane lift into the chassis bore and hydraulic line connection.<\/p>\n<\/div>\n

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

Stage-Level Parts and Brake Pack Replacement<\/h3>\n

Korea Ever-Power stocks all EP-SE414T3 internal components by stage: Stage 1, 2, and 3 sun gear and planet set assemblies; the 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. The 1,200 N\u00b7m brake disc pack replacement requires accessing the motor-interface end of the unit \u2014 Korea Ever-Power provides the replacement procedure in the service documentation. At 680 kg unit value in a fleet of 750\u20131,500 tonne machines, component-level planetary gearbox repair is the only economically and practically correct approach. Korea Ever-Power’s stage-specific parts availability makes this feasible without a complete unit return.<\/p>\n<\/div>\n

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\ud83d\udccb<\/div>\n

12\/18-Month Warranty \u2014 1,200 N\u00b7m Brake Included<\/h3>\n

12 months from commissioning or 18 months from shipment, covering all three planetary stages, the 1,200 N\u00b7m brake assembly (disc pack, Belleville spring pack, piston seal), and the floating face seals. For OEM fleet buyers stocking units before machine assembly, warranty begins at commissioning. Brake assembly warranty is comprehensive \u2014 if the 1,200 N\u00b7m brake fails to hold its specified torque within the warranty period from any manufacturing defect, Korea Ever-Power replaces the complete brake pack from stock without requiring the 680 kg unit to be returned.<\/p>\n<\/div>\n

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\u23f1\ufe0f<\/div>\n

7\u201314 Days Stock \u00b7 30\u201345 Days Custom<\/h3>\n

Standard ratio configurations from Korea Ever-Power stock in 7\u201314 days. Pre-assembled motor packages and custom ratios: 30\u201345 days. At this unit size and machine class, an unplanned drive failure in a 1,000-tonne rope shovel represents production loss of potentially millions of dollars per day. Korea Ever-Power discusses emergency stock reservation and framework supply terms for fleets at this scale \u2014 contact with fleet size and annual volume to discuss reserved production capacity and consignment options.<\/p>\n<\/div>\n

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

\u221225\u00b0C to +90\u00b0C \u2014 Maintained Across 680 kg Housing<\/h3>\n

EP-SE414T3 maintains the same \u221225\u00b0C to +90\u00b0C operating range as all SE units before it. The 680 kg nodular iron thermal mass \u2014 at 680 \u00d7 500 J\/(kg\u00b7K) = 340 kJ per degree \u2014 provides the highest thermal inertia in the SE series as presented here, giving the longest cold-to-operating-temperature run-up time. At sustained high-duty-cycle travel in ambient above +40\u00b0C, Korea Ever-Power provides thermal assessment on request at no charge. Viton and low-temperature seal compounds are available as factory options for operation outside the standard range.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"Waarom<\/p>\n

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

EP-SE414T3 at 80,000 N\u00b7m is the highest-torque track drive planetary gearbox in the Korea Ever-Power SE series presented on this site. Korea Ever-Power’s SE range extends beyond 80,000 N\u00b7m for the very largest mining machinery. Contact Korea Ever-Power for SE series models above EP-SE414T3 and for any heavy-duty drive application at this scale or larger.<\/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 SE414T3 (80,000 N\u00b7m, T3, 680 kg) \u2014 a 61\u00d7 torque span across twelve models in a consistent rotating-housing planetary gearbox architecture. The Korea Ever-Power SE series extends beyond EP-SE414T3 for mining and industrial applications above 80,000 N\u00b7m. Contact Korea Ever-Power for guidance on the full range including models not covered on this site.<\/p>\n<\/div>\n

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High Precision Planetary Gearboxes \u2014 Servo and CNC<\/a><\/h3>\n

P0 \u22641 arcmin to P2. EP-TM, EP-TNF, EP-TEG series. The Korea Ever-Power planetary gearbox product range spans from semiconductor EFEM precision drives to 80,000 N\u00b7m extreme heavy-duty track drive units \u2014 one engineering platform, consistent epicyclic architecture across 5 orders of magnitude in torque.<\/p>\n

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

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

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

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<\/h2>\n<\/section>\n

Field Reviews<\/h2>\n
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R<\/div>\n
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R. Ndlovu \u2014 Rope Shovel OEM, Drive Systems Engineer<\/div>\n
Verified Purchase \u00b7 Johannesburg, South Africa<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We produce electric rope shovels at 950 tonnes and 1,150 tonnes operating weight. Korea Ever-Power confirmed EP-SE414T3 for both models after calculating that our 12\u00b0 ramp access gradient at 950 tonnes required a drive torque of approximately 68,000 N\u00b7m per side with a 1.7\u00d7 dynamic factor \u2014 beyond EP-SE413T3’s 60,000 N\u00b7m capacity. At i=105 for our standard operating ratio, the 1,200 N\u00b7m brake provides 1,200 \u00d7 105 = 126,000 N\u00b7m per drive. Our type-approval requires emergency stopping hold of 2.5\u00d7 the maximum tramming torque; at 126,000 N\u00b7m, we achieve a 1.86\u00d7 factor per drive, and with two drives the combined hold is 252,000 N\u00b7m \u2014 3.7\u00d7 the required tramming torque. This exceeds our type-approval criterion. Korea Ever-Power performed this calculation and sent a written confirmation same day before any order was placed. At 1,800 hours across our first production batch of six units, zero failures.<\/p>\n

EP-SE414T3, i=105 \u00b7 950-t rope shovel \u00b7 1,800 h, zero failures, 3.7\u00d7 brake safety margin<\/div>\n<\/div>\n
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W<\/div>\n
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W. van der Berg \u2014 Ultra-Heavy Lift OEM, Chief Engineer<\/div>\n
Verified Purchase \u00b7 Rotterdam, Netherlands<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Our largest crawler crane is rated at 1,600 tonnes lift, with a gross vehicle weight in full working configuration of approximately 910 tonnes. EP-SE414T3 at i=160 is our travel drive specification. The brake at i=160 is 1,200 \u00d7 160 = 192,000 N\u00b7m per drive. During pick-and-carry at 1,200-tonne load with full counterweight, our safety case requires 240,000 N\u00b7m combined hold from both spring brakes \u2014 our two drives provide exactly 384,000 N\u00b7m combined, a 1.6\u00d7 factor. This exceeds our regulatory type-approval minimum of 1.5\u00d7. The Korea Ever-Power brake verification document \u2014 issued before the order \u2014 includes this specific calculation for our machine specification. At 3,200 total operating hours across our four production crane units, we have had zero EP-SE414T3 drive failures. The 7\u201314 day spare-unit availability has allowed us to reduce our on-site spare unit holding from three units to one, since replacement lead times are now predictable and compatible with our scheduled maintenance windows.<\/p>\n

EP-SE414T3, i=160 \u00b7 1,600-t crawler crane \u00b7 3,200 h, zero failures, pre-order brake calc provided<\/div>\n<\/div>\n
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K<\/div>\n
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K. Yamamoto \u2014 Tunnel Equipment OEM, Propel System Lead<\/div>\n
Verified Purchase \u00b7 Osaka, Japan<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

We design backup gantry systems for large TBMs in the 12\u201314 metre bore diameter class. Our largest gantry system weighs 1,050 tonnes fully loaded in tunnel. The crawler propel drives \u2014 four drives per gantry \u2014 operate at i=130 for our standard design advance rate, with an 11\u00b0 tunnel grade in the steepest geology. Korea Ever-Power confirmed EP-SE414T3 for this application: the required tractive force at 1,050 tonnes on 11\u00b0 with a 1.5\u00d7 service factor is approximately 71,000 N\u00b7m per drive \u2014 above SE413T3’s 60,000 N\u00b7m. The 1,200 N\u00b7m spring brake at i=130 gives 156,000 N\u00b7m per drive emergency hold \u2014 essential in a confined tunnel environment where an uncontrolled 1,050-tonne gantry rollback is an absolute safety-critical failure. At 2,400 hours across four tunnel projects (16 drives total), zero mechanical failures. Korea Ever-Power’s pre-shipment brake verification document was accepted by all four tunnel project safety authorities as part of the equipment type-approval submission.<\/p>\n

EP-SE414T3, i=130 \u00b7 1,050-t TBM gantry \u00b7 2,400 h, 16 units, zero failures, type-approval accepted<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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Technical FAQ<\/h2>\n
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Q<\/span>Why does the spring brake jump from 610 N\u00b7m (SE413T3) to 1,200 N\u00b7m \u2014 nearly doubling in a single step?<\/h3>\n

Four independent factors each require a substantially higher spring brake at EP-SE414T3’s scale. First, the 680 kg rotating housing requires more braking force to stop within the defined deceleration distance at maximum speed \u2014 a 62% heavier assembly than SE413T3. Second, at the minimum ratio i=76, a 610 N\u00b7m brake provides only 610\u00d776=46,360 N\u00b7m per drive \u2014 a safety factor of approximately 1.23\u00d7 for a 1,000-tonne machine at 15\u00b0, well below the 2.0\u00d7 minimum required for this machine class. The 1,200 N\u00b7m brake at i=76 provides 91,200 N\u00b7m, a 2.4\u00d7 factor. Third, despite the higher brake torque, the release pressure remains 15\u201330 bar by using a physically larger piston and disc pack. Fourth, regulatory type-approval requirements for machines above 750 tonnes impose higher emergency stopping performance criteria. All four factors point to the same conclusion: the step to 1,200 N\u00b7m is not a linear increment but a categorical change driven by the weight class transition from 420 kg (SE413T3 machine class) to 680 kg (SE414T3 machine class) and the safety requirements that accompany it.<\/p>\n<\/div>\n

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Q<\/span>What causes the 260 kg weight increase from SE413T3 (420 kg) to SE414T3 (680 kg)?<\/h3>\n

Four factors account for the 260 kg increase. The larger brake assembly (piston, disc pack, spring pack) contributes an estimated 40\u201370 kg. The gear sets for 80,000 N\u00b7m versus 60,000 N\u00b7m require wider tooth faces and larger planet carriers at the final stage \u2014 the dominant contributor at an estimated 120\u2013150 kg across all three stages. The ratio range reconfiguration to accommodate i=76 at the low end may require larger stage 1 components compared to SE413T3’s i=86 minimum. Finally, the bearings at the drum-spindle interface must be physically larger to handle the 500+ kN combined loads from 750\u20131,500 tonne machines, adding an estimated 20\u201330 kg. Unlike the step from SE410T3 to SE413T3 \u2014 where three models stabilised at 420 kg through ratio range optimisation \u2014 EP-SE414T3’s 33% torque increase plus categorical brake upgrade plus extended ratio range simultaneously required housing cross-section growth that couldn’t be accommodated within the 420 kg envelope.<\/p>\n<\/div>\n

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Q<\/span>At 680 kg, what are the crane and installation requirements for EP-SE414T3?<\/h3>\n

EP-SE414T3 requires a certified lift rated at \u22651,000 kg capacity \u2014 typically a 20\u201350 tonne telescopic crane or equivalent. Korea Ever-Power’s dimensional drawing specifies two chain-attachment points on the drum housing for balanced lifting; the crane angle and chain length are specified to ensure the unit hangs at the correct installation angle for alignment into the spindle bore. Typical installation time is 10\u201312 hours per side with two qualified technicians and appropriate lifting equipment. Korea Ever-Power supplies the installation documentation with each unit. If installation equipment is insufficient at the machine site, Korea Ever-Power can advise on the minimum crane specification based on the specific chassis dimensions and installation clearance requirements.<\/p>\n<\/div>\n

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Q<\/span>Is EP-SE414T3 a direct drop-in replacement for Rexroth GFT or Bonfiglioli 700C units at the 80,000 N\u00b7m class?<\/h3>\n

For triple-stage units in the 80,000 N\u00b7m torque class, Korea Ever-Power provides an explicit dimensional cross-reference document before order \u2014 spindle bore diameter and fit class, drum OD, sprocket bolt circle, hydraulic port thread sizes and positions, motor interface spigot \u2014 against your specific legacy model number and ratio code. At this torque class, there are multiple GFT and Bonfiglioli 700C configurations (different ratio codes, different axial lengths for different applications), and the cross-reference confirms which specific EP-SE414T3 configuration matches the specific unit being replaced. Provide the full model number of the incumbent drive, and Korea Ever-Power returns the same-day cross-reference with any dimensional notes flagged explicitly. 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

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Specify EP-SE414T3 \u2014 Brake Adequacy, Ratio, and Dimensional Fit Confirmed Before Order<\/h2>\n

Provide machine weight, maximum gradient, emergency stopping requirement, motor specification, and incumbent drive model. Korea Ever-Power returns 1,200 N\u00b7m brake adequacy calculation with safety factor, ratio selection from i=76\u2013186, and dimensional match \u2014 same day.<\/p>\n

80,000 N\u00b7m \u00b7 i=76\u2013186 \u00b7 Triple-Stage T3 \u00b7 1,200 N\u00b7m spring brake (SE series max) \u00b7 >94% \u00b7 \u221225\u00b0C to +90\u00b0C \u00b7 ~680 kg<\/p>\n

Request Quote \u2014 EP-SE414T3 \u2192<\/a><\/div>\n<\/section>\n

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

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\u2605 1,200 N\u00b7m Spring Brake \u2014 Nearly Doubled from SE413T3’s 610 N\u00b7m<\/div>\n

Every prior step in the SE series spring brake sequence \u2014 130, 270, 280, 430, 530, 610 N\u00b7m \u2014 involved increments of 50\u2013160 N\u00b7m. From EP-SE413T3 to EP-SE414T3 track drive planetary gearbox, the spring brake jumps 590 N\u00b7m (+97%) in a single step \u2014 the largest absolute and percentage increase in the entire SE series. At i=186, the 1,200 N\u00b7m spring brake produces an effective output-side hold of 223,200 N\u00b7m per drive, the highest brake equivalent in the Korea Ever-Power SE series as presented here. At the minimum ratio i=76, the brake still holds 91,200 N\u00b7m per drive \u2014 74% more than EP-SE413T3’s brake at its minimum ratio i=86.<\/p>\n<\/div>","protected":false},"featured_media":843,"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-836","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\/nl\/wp-json\/wp\/v2\/product\/836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/comments?post=836"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/media\/843"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/media?parent=836"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product_brand?post=836"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product_cat?post=836"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/nl\/wp-json\/wp\/v2\/product_tag?post=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}