{"id":920,"date":"2026-06-18T02:36:24","date_gmt":"2026-06-18T02:36:24","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=920"},"modified":"2026-06-18T02:36:24","modified_gmt":"2026-06-18T02:36:24","slug":"zl24-wheel-drive-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/es\/producto\/zl24-wheel-drive-planetary-gearbox\/","title":{"rendered":"ZL24 Wheel Drive Planetary Gearbox"},"content":{"rendered":"
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<\/p>\n

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ZL SERIES FLAGSHIP \u00b7 ELECTRIC-READY HEAVY-DUTY<\/div>\n

ZL24<\/h2>\n

21,000 Nm. Built for the machines that are going electric.<\/p>\n

\n
\n
21,000<\/div>\n
Nm Cont.<\/div>\n<\/div>\n
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50,500<\/div>\n
Nm Peak<\/div>\n<\/div>\n
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4,000<\/div>\n
RPM<\/div>\n<\/div>\n
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4-2,319<\/div>\n
Ratio Range<\/div>\n<\/div>\n
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1-4<\/div>\n
Etapas<\/div>\n<\/div>\n<\/div>\n<\/div>\n

The EP-ZL24 closes the circle that the wheel drive planetary gearbox<\/a> catalogue began with the 601L1A. Where the 6xx series serves the machines of the past and present \u2014 diesel-hydraulic vehicles driven by low-speed axial piston motors \u2014 the ZL24 serves the machines of the next decade: battery-electric mining haul trucks, autonomous port terminal vehicles, and zero-emission construction equipment driven by high-speed permanent magnet motors spinning at 2,000-4,000 rpm.<\/p>\n

At 21,000 Nm continuous, the ZL24 overlaps directly with the 607 (17,000 Nm) and 609 (23,000 Nm) in the 6xx hydraulic series. The difference is not in the torque \u2014 it is in everything else. The ZL24 accepts 4,000 rpm input (versus 3,000 for the 6xx), uses helical-cut gears for 40% lower noise, achieves DIN 5-6 accuracy for electric-motor position control compatibility, and spans ratios from 4 to 2,319 across 1-4 stages \u2014 a configurability that no 6xx model approaches. When the powertrain is electric, the ZL24 is the wheel drive that belongs in the circuit.<\/p>\n<\/section>\n

\"ZL24<\/p>\n

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ZL24 Heavy-Duty Wheel Drive Planetary Gearbox \u2014 Technical Parameters<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Continuous torque (N2xh=100,000)<\/td>\n21,000 Nm<\/td>\n<\/tr>\n
Peak torque<\/td>\n50,500 Nm<\/td>\n<\/tr>\n
Gear ratio range<\/td>\n4 to 2,319 (1-4 stages)<\/td>\n<\/tr>\n
Available stages<\/td>\n1, 2, 3, or 4<\/td>\n<\/tr>\n
Maximum input speed<\/td>\n4,000 rpm<\/td>\n<\/tr>\n
Mechanical efficiency<\/td>\n\u2265 94% (varies by stage count)<\/td>\n<\/tr>\n
Thermal power (Pt)<\/td>\n15 – 46 kW (F\/M, varies by stage)<\/td>\n<\/tr>\n
Integrated parking brake<\/td>\nNone (motor-integrated or external brake)<\/td>\n<\/tr>\n
Wheel mounting<\/td>\nRotating flange, SAE\/Universal<\/td>\n<\/tr>\n
Sealing<\/td>\nMulti-lip FKM, IP67+<\/td>\n<\/tr>\n
Housing<\/td>\nDuctile iron QT600-3<\/td>\n<\/tr>\n
Gear material<\/td>\n20CrMnTi, helical 3-planet, HRC 58-62, DIN 5-6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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ZL24 vs 607\/609 \u2014 When to Cross the Line from Hydraulic to Electric Architecture<\/h2>\n

The ZL24 (21,000 Nm) competes directly with the 607 (17,000 Nm) and 609 (23,000 Nm) in the 6xx hydraulic series. The torque envelopes overlap. The choice between them is not about torque \u2014 it is about what drives the input shaft.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Criterio<\/th>\n607\/609 (Hydraulic)<\/th>\nZL24 (Electric)<\/th>\n<\/tr>\n<\/thead>\n
Velocidad de entrada<\/td>\n3,000 rpm<\/td>\n4,000 rpm<\/td>\n<\/tr>\n
Gear cut<\/td>\nStraight-cut<\/td>\nHelical (40% lower noise)<\/td>\n<\/tr>\n
Gear accuracy<\/td>\nDIN 5-6<\/td>\nDIN 5-6<\/td>\n<\/tr>\n
Ratio range<\/td>\n33-142 (607) \/ 33-142 (609)<\/td>\n4 – 2,319<\/td>\n<\/tr>\n
Stage options<\/td>\nL2 or L3<\/td>\n1, 2, 3, or 4<\/td>\n<\/tr>\n
Integrated brake<\/td>\n300-600 Nm<\/td>\nNinguno<\/td>\n<\/tr>\n
Regenerative braking<\/td>\nNot applicable<\/td>\nFull compatibility<\/td>\n<\/tr>\n
Optimal motor type<\/td>\nHydraulic axial piston<\/td>\nPMSM, BLDC, induction<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Choose the 607\/609 when:<\/strong><\/p>\n

The vehicle uses a diesel engine driving hydraulic pumps. The integrated brake is a regulatory or operational requirement. The machine will never be electrified. The existing fleet is standardised on the 6xx series and cross-compatibility with spare parts matters more than performance optimisation.<\/p>\n<\/div>\n

Choose the ZL24 when:<\/strong><\/p>\n

The vehicle uses battery-electric or hybrid-electric propulsion. Regenerative braking is part of the energy management strategy. Low noise matters (underground mining, port terminals near residential areas). The motor speed exceeds 3,000 rpm. The application needs ratios below 33 or above 142 (outside the 6xx range).<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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The 21,000 Nm Electric Wheel Drive \u2014 Engineering for the Next Decade of Heavy Equipment<\/h2>\n

Every major mining company has announced diesel-to-electric fleet transition targets. Every major port has zero-emission terminal deadlines. The machines that meet these commitments need a wheel drive designed for electric motors from the ground up \u2014 not a hydraulic wheel drive with an adapter plate bolted on.<\/p>\n

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Battery-Electric Mining Trucks<\/strong><\/p>\n

The first generation of battery-electric mining haul trucks (30-50 tonne payload) uses 150-300 kW PMSM motors at 2,500-4,000 rpm. The ZL24 2-stage at ratio 20-40 converts this motor output into 21,000 Nm of sustained wheel torque for loaded haul road climbing. The helical gear mesh reduces drivetrain noise by 8-12 dB compared to a hydraulic-era straight-cut wheel drive \u2014 a critical factor in electric vehicles where the absence of engine noise makes gearbox mesh audible to the operator.<\/p>\n<\/div>\n

Regenerative Braking Energy Recovery<\/strong><\/p>\n

When a loaded electric truck descends a haul road, the motor operates as a generator, feeding energy back through the ZL24 gearbox to the battery. The ZL24 transmits this reverse-direction torque at the same rated capacity as forward drive \u2014 the helical planetary gear train is mechanically symmetrical. On a typical open-pit mine cycle with a 15% loaded downhill return, regen recovers 15-25% of the energy consumed during the loaded uphill climb, directly extending battery range and reducing the required charging infrastructure.<\/p>\n<\/div>\n

Zero-Emission Port Equipment<\/strong><\/p>\n

Battery-electric terminal tractors, straddle carriers, and reach stackers replacing diesel-hydraulic predecessors in ports with zero-emission mandates. The ZL24 1-stage at ratio 4-8 paired with a high-torque PMSM motor provides the 15-25 km\/h travel speed these machines need for productive container throughput, with the full 21,000 Nm available for loaded breakaway on wet, polished terminal apron surfaces. The absence of an internal brake eliminates interference with the electric motor regen braking algorithm.<\/p>\n<\/div>\n

Autonomous Heavy Vehicle Platforms<\/strong><\/p>\n

Autonomous trucks and heavy vehicle platforms<\/a> requiring precise speed control at the wheel for path-following accuracy. The DIN 5-6 gear accuracy of the ZL24 preserves the PMSM motor encoder resolution through the gear reduction, enabling the autonomous controller to command wheel speed with sub-percentage precision. Contact Corea Ever-Power<\/a> for the position resolution and backlash specification at your target ratio.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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ZL24 Wheel Drive \u2014 Where Heavy Equipment Meets Electric Propulsion<\/h2>\n

\"ZL24<\/p>\n

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Battery-Electric Haul Trucks (30-50 t)<\/h3>\n

First-generation BEV mining trucks replacing diesel-hydraulic predecessors on haul roads with grades up to 15-20%. The ZL24 2-stage at ratio 25-40 paired with a 200 kW PMSM motor provides the sustained climbing torque and the regen braking capacity for the descent cycle. The helical gears eliminate the characteristic straight-cut gear whine that would otherwise be the dominant noise source on an electric truck operating without engine masking noise.<\/p>\n<\/div>\n

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Electric Port Terminal Equipment<\/h3>\n

Battery-electric and hybrid-electric straddle carriers, terminal tractors, and reach stackers operating under port zero-emission mandates. The ZL24 1-stage at ratio 4-8 provides the high-speed, high-torque combination that container handling demands, while the 50,500 Nm peak accommodates the loaded breakaway torque spikes that occur when pulling a 40-tonne container from a standing start on a wet surface. The slewing drive planetary gearbox<\/a> handles the spreader rotation on the same platform.<\/p>\n<\/div>\n

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Autonomous Underground Mining Vehicles<\/h3>\n

Battery-electric autonomous LHDs (load-haul-dump) and personnel carriers for underground mines transitioning away from diesel for ventilation cost reduction. The ZL24 3-stage at ratio 60-120 provides the traction for steep ramp grades in underground drifts, and the reduced noise (helical gears + no diesel engine) significantly improves the working environment for any human operators sharing the drift. The track drive planetary gearbox<\/a> serves the tracked underground dozer variants in the same fleet.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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The Full Korea Ever-Power Planetary Gearbox Ecosystem<\/h2>\n
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\"ZR45<\/p>\n
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Slewing Drive Planetary Gearbox \u2192<\/a><\/h3>\n

ZR series for electric truck body tilt, straddle carrier spreader rotation, and autonomous vehicle sensor turrets.<\/p>\n<\/div>\n<\/div>\n

\"Track<\/p>\n
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Track Drive Planetary Gearbox \u2192<\/a><\/h3>\n

EP-SE series for underground tracked LHDs, electric dozer platforms, and autonomous crawler equipment.<\/p>\n<\/div>\n<\/div>\n

\"Precision<\/p>\n
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Precision Planetary Gearbox \u2192<\/a><\/h3>\n

EP-ZDS for autonomous vehicle steering actuators, electric truck suspension controls, and port container positioning systems.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Heavy Electric Wheel Drive Planetary Gearbox \u2014 ZL24 FAQ<\/h2>\n
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Why is the ZL24 input speed 4,000 rpm instead of 5,200 like the ZL02?<\/h3>\n

The ZL24 gears are physically much larger than the ZL02 to carry 14x the torque. Larger gears at the same rotational speed produce higher tooth peripheral velocity \u2014 the speed at which the gear teeth slide past each other. Above a critical peripheral velocity, the lubricant film between the teeth breaks down, causing scuffing and accelerated wear. The 4,000 rpm limit ensures the ZL24 tooth peripheral velocity stays within the safe operating envelope for 20CrMnTi carburised steel at the gear module sizes used in this frame. This limit is still 33% higher than the 6xx series (3,000 rpm), which is the margin that electric motor compatibility requires.<\/p>\n<\/div>\n

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Can the ZL24 replace a 609 on an existing diesel-hydraulic truck converting to electric?<\/h3>\n

Not as a drop-in replacement. The ZL24 and 609 have different housing dimensions, output flange patterns, and input interfaces. A diesel-to-electric conversion requires redesigning the wheel-end mounting structure to accommodate the ZL24 housing geometry. However, the output flange bolt circle follows SAE standards, so the wheel rim interface may be compatible if the BCD matches. Contact Korea Ever-Power with the existing 609 dimensional drawing and the proposed electric motor specifications for a conversion feasibility assessment.<\/p>\n<\/div>\n

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How does the ZL24 handle the thermal load from continuous regen braking on a long downhill grade?<\/h3>\n

During regenerative braking, the gearbox dissipates heat proportional to (1 – efficiency) multiplied by the regen power flow. At 94% efficiency and 100 kW regen power, the gearbox absorbs 6 kW of heat \u2014 the same as during 100 kW forward drive. The 15-46 kW thermal power rating (Pt) of the ZL24 is designed for continuous forward drive plus continuous regen in a balanced duty cycle. On sustained downhill grades exceeding 3 km, verify that the total thermal load (forward + regen averaged over the cycle) does not exceed the Pt rating for the selected stage count.<\/p>\n<\/div>\n

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What noise level does the ZL24 produce compared to a 6xx-series wheel drive at the same torque?<\/h3>\n

The helical gear mesh of the ZL24 produces approximately 8-12 dB(A) less noise than the straight-cut gears used in the 6xx series at equivalent speed and torque. At 2,000 rpm input under full load, the ZL24 2-stage typically measures 68-72 dB(A) at 1 metre versus 78-82 dB(A) for a comparable 6xx model. On a diesel truck, this difference is masked by engine noise. On a battery-electric truck with no engine, the wheel drive gearbox<\/a> becomes the primary noise source \u2014 making the 10+ dB advantage of helical gears the difference between operator comfort compliance and failure.<\/p>\n<\/div>\n

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What motor power class pairs with the ZL24 for a 40-tonne electric mining truck?<\/h3>\n

A 40-tonne payload truck at 80-tonne GVW climbing a 15% grade at 10 km\/h requires approximately 130 kW of sustained propulsion power per axle (2 wheel drives). Each ZL24 receives approximately 65 kW. At ratio 30 and 3,500 rpm motor speed, the motor output torque is 21,000 \/ 30 = 700 Nm at the motor shaft. A 65 kW, 700 Nm, 3,500 rpm PMSM motor (approximately 200 mm diameter, 300 mm length, 80-100 kg) is a standard industrial servo motor frame size \u2014 compact, readily available, and well within the ZL24 input speed envelope.<\/p>\n<\/div>\n

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What is the expected service life of the ZL24 in an electric vehicle application?<\/h3>\n

The 100,000-hour rated life at continuous torque translates to approximately 11 years of 24\/7 operation. In practice, electric vehicle duty cycles are less severe than diesel-hydraulic equivalents because regen braking reduces the net mechanical energy throughput per tonne-kilometre. The ZL24 in an electric mining truck is expected to outlast the first battery pack (typically 5,000-8,000 hours) by a factor of 10-15x. The gearbox is a fit-and-forget component \u2014 the vehicle battery, power electronics, and tyres will all reach their service limits before the ZL24 requires its first overhaul.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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Field Reports<\/h2>\n
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E<\/div>\n
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Erik N. \u2014 Electric Mining Truck Programme Director<\/div>\n
Verified Purchase \u00b7 Kiruna, Sweden \u00b7 April 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Prototype BEV haul truck, 35-tonne payload, ZL24**2 ratio 32, paired with 180 kW PMSM motors. The truck completed our full certification test programme including the 18% loaded grade climb, 5 km sustained downhill regen descent, and -28 deg C cold-start test. Noise measurement inside the cab during the grade climb was 64 dB(A) \u2014 18 dB lower than our diesel-hydraulic baseline truck. The regen energy recovery on the 5 km descent was 22% of the energy consumed during the loaded ascent, exactly matching our simulation model. We have committed to 8 trucks for the initial production run with ZL24 as the standardised wheel drive.<\/p>\n<\/div>\n

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\n
L<\/div>\n
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Liam O. \u2014 Port Equipment Electrification Lead<\/div>\n
Verified Purchase<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

Electric straddle carrier conversion, ZL24**1 ratio 6, replacing a diesel-hydraulic 609 drivetrain. The conversion required a new wheel-end mounting bracket (the ZL24 housing is a different shape to the 609) but the wheel rim bolt circle was compatible. Result: 30% reduction in energy cost per container move, zero tailpipe emissions, and the operators immediately noticed how quiet the machine is at creep speed during container stacking. The regen braking recovers enough energy during each loaded deceleration to offset approximately 12% of total consumption. The ZL24 has been in service for 11 months on a 16-hour-per-day cycle with zero maintenance beyond the scheduled oil change.<\/p>\n<\/div>\n

\n
\n
R<\/div>\n
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Raj P. \u2014 Underground Mining Automation Manager<\/div>\n
Verified Purchase \u00b7 June 2026<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2606<\/div>\n<\/div>\n

Autonomous electric LHD, 12-tonne payload, ZL24**3 ratio 80, 75 kW induction motor. The machine operates autonomously in a gold mine, 800 metres below surface, on a 12% ramp between the stope and the ore pass. The ZL24 noise level underground is dramatically lower than the diesel LHD it replaced \u2014 the ventilation fans are now the loudest thing in the drift, which is exactly the outcome our ventilation engineers wanted. The 4-star rating reflects one integration challenge: the ZL24 data sheet did not specify the exact moment of inertia of the internal gear train, which our motor controller engineer needed to tune the regen braking algorithm precisely. We estimated it, tuned iteratively, and achieved good results \u2014 but having the MOI value published for each stage configuration would have saved two weeks of commissioning time.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

The heaviest machine in the fleet is going electric. The EP-ZL24 is where the ZL series high-speed electric architecture meets heavy-equipment torque: 21,000 Nm continuous and 50,500 Nm peak at up to 4,000 rpm input, across ratios from 4 to 2,319 in 1-4 stages. This is the wheel drive planetary gearbox for the battery-electric mining trucks, autonomous port haulers, and zero-emission construction machines that are replacing their diesel-hydraulic predecessors across every major mining jurisdiction and port terminal in the world. The ZL24 delivers the torque of the 6xx hydraulic series through the high-speed, helical-gear, electric-motor-optimised architecture of the ZL family \u2014 bridging two propulsion eras in one housing.<\/div>","protected":false},"featured_media":923,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[968],"product_tag":[],"class_list":["post-920","product","type-product","status-publish","has-post-thumbnail","product_cat-wheel-drive-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/product\/920","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/comments?post=920"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/media\/923"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/media?parent=920"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/product_brand?post=920"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/product_cat?post=920"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/product_tag?post=920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}