{"id":2044,"date":"2026-07-22T08:04:28","date_gmt":"2026-07-22T08:04:28","guid":{"rendered":"https:\/\/gearrack.top\/?p=2044"},"modified":"2026-07-22T08:04:28","modified_gmt":"2026-07-22T08:04:28","slug":"planetary-gears-for-electric-vehicles","status":"publish","type":"post","link":"https:\/\/gearrack.top\/it\/planetary-gears-for-electric-vehicles\/","title":{"rendered":"Planetary Gears for Electric Vehicles"},"content":{"rendered":"
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GEAR APPLICATION GUIDE \u00b7 PLANETARY GEAR \u00b7 P09<\/span><\/p>\n

Planetary Gears for Electric Vehicles:
\nEV Motor Reduction Drives, Two-Speed Transmissions and Electric Axle Gear Trains<\/span><\/h1>\n

Electric vehicle planetary gear sets operate under conditions that differ fundamentally from conventional automotive transmission gears \u2014 the EV motor’s ability to produce maximum torque from zero RPM eliminates the need for a multi-ratio gearbox in most passenger car applications, replacing the 6\u20138 speed transmission with a single-ratio planetary reduction unit that steps down the motor’s 12,000\u201320,000 RPM operating speed to the 2,000\u20134,000 RPM wheel drive speed. This simplification creates a new set of engineering challenges: the single-ratio planetary must cover the full vehicle speed range from zero to maximum (typically 150\u2013200 km\/h), sustaining maximum motor torque at any speed without thermal or fatigue failure, while achieving a noise level below the EV’s inherently quiet cabin ambient (the absence of engine noise makes gear whine from a DIN 7 or DIN 8 quality planet gear distinctly audible to passengers).<\/p>\n

20CrMnTi \u00b7 18CrNiMo7-6 \u00b7 M3\u2013M6 \u00b7 DIN 5\u20136<\/span>
\n12,000\u201320,000 RPM \u00b7 1-speed \u00b7 Low NVH \u00b7 150kW+<\/span>
\nPassenger EV \u00b7 Electric Truck \u00b7 e-Axle \u00b7 2-Speed \u00b7 PHEV<\/span><\/div>\n<\/div>\n<\/div>\n
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SPEED<\/p>\n

12,000\u201320,000 RPM<\/p>\n

EV motor input speed to the planetary gear set (at the sun gear, for a fixed-ring planetary). This is 3\u20135\u00d7 the speed of typical industrial planetary applications and drives the NVH (noise, vibration, harshness) and bearing life requirements \u2014 the planet pin bearings, in particular, must operate at the highest speed of any planetary bearing application outside of aerospace. Needle roller bearings are standard for EV planet pins; at 15,000 RPM sun, planet speed = 15,000 \u00d7 sun teeth \/ (sun + ring teeth) \u00d7 2 \u2248 6,000\u20139,000 RPM<\/p>\n<\/div>\n

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TORQUE<\/p>\n

Up to 5,000 Nm<\/p>\n

EV planetary output torque at the wheel drive. Passenger car single-motor: 1,500\u20132,500 Nm at the output (after 8\u201312:1 reduction). Dual-motor performance EV: up to 3,500 Nm per axle. Electric commercial vehicle (e-truck, e-bus): 4,000\u20135,000 Nm at the axle. The maximum torque occurs at launch (0 km\/h full throttle) \u2014 the gear fatigue design must sustain this maximum torque for the vehicle’s design life of 300,000\u2013500,000 km<\/p>\n<\/div>\n

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NVH TARGET<\/p>\n

\u2264 65 dB(A)<\/p>\n

Maximum gear mesh noise contribution to cabin noise in a passenger EV at 100 km\/h. This requires profile-ground DIN 5\u20136 planet gears (DIN 7 or below produces gear whine perceptible above the EV cabin noise floor of 45\u201355 dB(A), compared to an ICE vehicle where the engine noise masks gear whine at any DIN level). Some EV OEMs target even lower: \u2264 60 dB(A) for premium segment EVs where gear noise would be a major customer quality complaint<\/p>\n<\/div>\n

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LIFE TARGET<\/p>\n

300,000\u2013500,000 km<\/p>\n

EV drivetrain planetary gear design life. Passenger EV: 300,000 km (15 years at 20,000 km\/year). Electric commercial truck: 500,000\u20131,000,000 km. At 8:1 reduction and 100 km\/h (equivalent to 4,600 wheel RPM), the planet gear accumulates 10\u00b9\u2070 tooth contact cycles over 300,000 km \u2014 requiring design in the gigacycle fatigue regime, beyond the conventional 10\u2079 cycle limit<\/p>\n<\/div>\n<\/div>\n

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EV Planetary Gear Engineering \u2014 High Speed, Gigacycle Fatigue, and NVH<\/h2>\n

The EV reduction planetary operates in a performance regime that challenges several standard gear design assumptions. The first challenge is the gigacycle fatigue regime \u2014 at 15,000 RPM motor speed with an 8:1 planetary ratio, the planet gear accumulates tooth contact cycles at a rate of approximately 15,000 \u00d7 ring_teeth \/ (2 \u00d7 planet_teeth) RPM \u00d7 60 minutes = over 1 million tooth contact cycles per hour of full-speed operation. Over 300,000 km of vehicle life at an average speed of 60 km\/h (5,000 hours of operation), the planet gear accumulates more than 5 \u00d7 10\u2079 tooth contact cycles \u2014 well beyond the 10\u2077 cycles at which the material endurance limit is conventionally defined and the 10\u2078 cycles at which most automotive gear fatigue test databases end. The EV planet gear must be designed for gigacycle fatigue (10\u2079\u201310\u00b9\u2070 cycles), where the allowable contact stress is 20\u201335% below the conventional endurance limit \u2014 a significant design driver that forces either a larger module (to reduce the contact stress at the same output torque) or a higher-strength material (18CrNiMo7-6 deep case carburized instead of 20CrMnTi) that has lower fatigue strength reduction in the gigacycle regime.<\/p>\n

Korea Ever-Power’s planetary gear sets for electric vehicles<\/a> are manufactured in 18CrNiMo7-6 deep case carburized (the preferred material for EV reduction planetary gears \u2014 the deep case depth of 1.5\u20132.5 mm at the tooth root provides both the hardness gradient for gigacycle fatigue resistance and the core toughness for the high-torque launch events), with DIN 5\u20136 profile grinding for NVH compliance, and matched planet pitch tolerance \u00b12 \u03bcm for optimum load sharing. For customers requiring complete EV reduction units including the differential and e-axle housing, Korea Ever-Power’s planetary gearbox<\/a> range includes gear stage kits designed for integration into EV e-axle designs from OEM and Tier 1 automotive suppliers. The EV planetary ring gear internal tooth profile is ground to DIN 5 (not DIN 6 or 7 as used in most industrial applications) because the high pitch line velocity at 15,000 RPM motor speed places the EV gear mesh frequency in the audible range (typically 1,000\u20135,000 Hz for 15,000 RPM motor with 20\u201340 tooth planet gears) where the human ear is most sensitive and where gear whine from DIN 6+ profile errors would be perceptible as an objectionable tonal noise above the EV’s quiet cabin ambient.<\/p>\n

The thermal management of the EV reduction planetary is a design challenge that does not arise in lower-speed industrial applications. At 15,000 RPM sun gear input, the gear mesh friction power loss (even at 99% efficiency per stage) represents several kilowatts of heat generation in the gear mesh \u2014 for a 150 kW EV motor at full power with a 2-stage planetary at 98% total efficiency, the heat generated in the gear set is 3 kW. This 3 kW must be removed from the gear set without overheating the planet bearings (whose maximum operating temperature for long-life needle roller bearings is 120\u00b0C). Most EV reduction units use an oil-jet lubrication system (a pressurised oil circuit that sprays oil directly onto the gear mesh and planet bearing) rather than an oil bath (where the gears dip into a sump), because oil-jet lubrication provides 5\u201310\u00d7 the cooling capacity at the gear mesh contact zone compared to oil-bath splash lubrication. Korea Ever-Power EV planetary gear sets are designed with consideration for the oil-jet delivery system \u2014 the planet carrier windows (the openings in the carrier structure through which the oil jets must reach the planet bearings) are sized to allow adequate oil flow at the carrier rotation speed without excessive parasitic oil churning drag from the rotating carrier windows interacting with the jet streams.<\/p>\n

\"EV
Korea Ever-Power 18CrNiMo7-6 deep case carburized planetary gear set for electric vehicle reduction drive \u2014 2-stage: stage 1 sun M4 16T, planet \u00d74 M4 20T, ring M4 56T (ratio 4.5:1); stage 2 sun M4 14T, planet \u00d74 M4 22T, ring M4 58T (ratio 5.14:1); total ratio 23.1:1. All gears 18CrNiMo7-6 deep carburized, effective case depth at tooth root 1.8 mm (vs 1.2 mm for standard industrial 20CrMnTi \u2014 the deeper case extends the hardened zone below the contact Hertzian stress maximum, providing fatigue resistance to 10\u00b9\u2070 cycles). DIN 5 profile ground, planet matched set \u00b11.5 \u03bcm pitch deviation. 4 planets per stage (vs 3 in standard industrial planetary) for enhanced load sharing and reduced tooth load per planet \u2014 critical for gigacycle fatigue at 15,000 RPM. Rated input speed: 16,000 RPM continuous (motor peak speed 18,000 RPM, sustained \u2264 60 seconds). Oil-jet lubrication port compatibility with the e-axle housing oil circuit design of the customer\u2019s vehicle platform.<\/figcaption><\/figure>\n<\/section>\n
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Electric Vehicle Drive Type Planetary Specifications<\/h2>\n
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EV TYPE 01<\/p>\n

PASSENGER EV
\nSINGLE-MOTOR<\/p>\n<\/div>\n

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Planetary specification:<\/strong> 18CrNiMo7-6 deep carburized, M4\u2013M5, DIN 5\u20136, ratio 8:1\u201312:1 (single 2-stage planetary), 4 planets per stage for load sharing, oil-jet lubrication, maximum input speed 18,000 RPM, NVH \u2264 65 dB(A) at 15,000 RPM, design life 10\u00b9\u2070 tooth cycles. Single-motor passenger EVs (the configuration used by Tesla Model 3\/Y single-motor, Volkswagen ID.3\/ID.4, Renault Megane E-Tech, BYD Seal, and others) use a fixed-ratio planetary reduction between the PMSM or induction motor and the differential \u2014 the single gear ratio is the key design optimisation target for the planetary stage. The ratio must be high enough to let the motor operate at its efficiency optimum speed under normal driving (typically 6,000\u201310,000 RPM for PMSM motors), while low enough to not over-spin the motor at maximum vehicle speed. Most single-motor EVs use a ratio of 8:1\u201310:1, giving a motor speed of 12,000\u201315,000 RPM at 150 km\/h (assuming 330 mm wheel radius). Korea Ever-Power single-motor EV planetary gear sets are validated to the gigacycle fatigue regime using a combined load spectrum that reflects the worldwide driving cycle data from the target market (Europe: WLTP; North America: US06; China: CLTC) \u2014 the design life fatigue assessment uses this duty cycle rather than the maximum torque continuous operation, which would be excessively conservative for typical EV usage patterns.<\/p>\n<\/div>\n<\/div>\n

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EV TYPE 02<\/p>\n

ELECTRIC TRUCK
\nE-AXLE DRIVE<\/p>\n<\/div>\n

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Planetary specification:<\/strong> 18CrNiMo7-6 or 20CrNiMo deep carburized, M5\u2013M7, DIN 6, ratio 12:1\u201320:1 (2-stage or 3-stage planetary depending on the axle configuration), 4 planets per stage, output torque up to 5,000 Nm per axle, design life 10,000 hours (500,000 km equivalent), NVH \u2264 70 dB(A). Electric trucks and buses (BYD Han, Mercedes eActros, Volvo FH Electric, DAF XF BEV) use significantly larger planetary gear sets than passenger EVs because the vehicle weight (5\u201340 tonnes fully laden) produces wheel forces that translate to axle torques of 4,000\u20135,000 Nm \u2014 four to five times the maximum torque of a typical passenger EV. The larger module (M5\u2013M7) reduces the number of tooth contacts per revolution and therefore the cumulative cycle count at the same vehicle distance, partially mitigating the gigacycle fatigue challenge compared to the smaller module passenger EV gears. However, the absolute tooth load per cycle is proportionally higher, requiring the 18CrNiMo7-6 deep carburized material for the higher contact fatigue endurance at the subsurface shear stress maximum (which for M6 gears at 5,000 Nm output is at approximately 1.5\u20132.0 mm below the tooth surface \u2014 exactly within the extended case depth of the deep carburizing treatment).<\/p>\n<\/div>\n<\/div>\n

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EV TYPE 03<\/p>\n

2-SPEED EV
\nTRANSMISSION<\/p>\n<\/div>\n

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Planetary specification:<\/strong> 18CrNiMo7-6 deep carburized, M3\u2013M5, DIN 5, ratio step 1 (low gear): 10:1\u201315:1 for maximum acceleration; ratio step 2 (high gear): 5:1\u20138:1 for highway efficiency, ring gear fixed or carrier fixed depending on the ratio switching mechanism (typically a dog clutch or synchroniser on the ring gear for the ratio shift). Two-speed EV transmissions are gaining traction in performance EVs and electric commercial vehicles because the single fixed-ratio planetary forces a compromise between launch acceleration (requires high torque at low speed \u2014 favours high ratio) and top speed (requires low reduction at high speed \u2014 favours low ratio). A 2-speed transmission eliminates this compromise: gear 1 provides maximum acceleration from rest, gear 2 allows the motor to operate at its efficiency optimum speed at highway cruise. The ratio shift mechanism in a 2-speed EV planetary requires the ring gear to switch between fixed (generating reduction from sun to carrier) and rotating-with-carrier (producing 1:1 direct drive) \u2014 a mechanism that demands the ring gear to sustain the shock load of ratio engagement under partially-synchronised motor speed during the shift event. Korea Ever-Power 2-speed EV ring gears are designed with enhanced tooth root toughness (achieved by limiting the carburizing temperature to 900\u00b0C to avoid austenitic grain growth, and by applying a post-hardening shot peening treatment to the tooth root that induces compressive residual stress at the root fillet \u2014 improving the bending fatigue strength by 15\u201320% for the ratio shift impact loads).<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"Korea
Korea Ever-Power EV planetary gear NVH measurement \u2014 transmission error (TE) measurement at the assembled stage level, with the stage running at 5,000 RPM input (representing normal city driving motor speed) and 12,000 RPM (representing highway speed). The TE measurement at speed (dynamic TE, as opposed to the static TE measured on the gear measurement machine) captures the combined contribution of gear profile error, planet load sharing imbalance, and the dynamic response of the ring gear and carrier structure to the mesh excitation \u2014 all three contribute to the EV cabin noise. Korea Ever-Power EV planetary gear sets are issued with a dynamic TE certificate showing the peak-to-peak TE at both city (5,000 RPM) and highway (12,000 RPM) motor speeds, in the frequency domain \u2014 the frequency spectrum shows whether any NVH issue is concentrated at the planet mesh frequency (primary concern) or at harmonics of the mesh frequency (secondary concern). Spectra showing peaks above 15 \u03bcrad at the mesh frequency indicate the stage will produce audible gear whine in the EV cabin and require re-grinding of the planet and ring gear profile to reduce the profile error contribution to TE.<\/figcaption><\/figure>\n<\/section>\n
\"Korea
Korea Ever-Power EV planetary gear manufacturing \u2014 profile grinding of 18CrNiMo7-6 deep case carburized planet gears to DIN 5 quality. The grinding setup for EV planet gears at M4 requires a CBN grinding wheel with a dresser that maintains the wheel profile within \u00b11 \u03bcm of the involute form \u2014 at DIN 5, the total profile form error tolerance is 3.8 \u03bcm for an M4 gear, so the grinding wheel dresser accuracy must be at least 4\u00d7 better than the gear tolerance to prevent the wheel form error from consuming the available tolerance budget. Korea Ever-Power uses a CNC diamond roller dresser (CNC-form dresser) on all EV planetary gear grinding machines \u2014 the dresser profile is generated by the CNC control from the theoretical involute function, and the dresser wear is compensated automatically by the CNC after every 10 grinding cycles. The 4-planet per stage configuration of Korea Ever-Power EV planetary gear sets requires all 4 planets in each stage to be matched within \u00b11.5 \u03bcm pitch deviation (tighter than the \u00b12 \u03bcm used for industrial planetary) \u2014 achieving this matching tolerance in 18CrNiMo7-6 requires both the DIN 5 grinding accuracy and the individual planet TE measurement that Korea Ever-Power performs before matching, allowing the 4 planets in each stage to be selected from a batch of 6\u20138 ground planets for the closest mutual pitch match.<\/figcaption><\/figure>\n
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Frequently Asked Questions \u2014 Planetary Gears for Electric Vehicles<\/h2>\n
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Q 01<\/span><\/p>\n

We are developing a new passenger EV at 200 kW motor power with a target gear ratio of 9:1. Should we use 20CrMnTi or 18CrNiMo7-6 for the planet gears, and what is the cost premium for 18CrNiMo7-6?<\/p>\n<\/div>\n

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Material selection for a 200 kW, 9:1 passenger EV planetary: the choice between 20CrMnTi and 18CrNiMo7-6 is determined by whether the planet gear’s calculated contact fatigue safety factor S_H at 10\u00b9\u2070 tooth contact cycles exceeds 1.0 (the minimum) for the EV duty cycle. Korea Ever-Power performs this calculation as part of the application engineering review \u2014 but the typical result for 200 kW EV planet gears at M4 module is: 20CrMnTi carburized:<\/strong> allowable contact stress \u03c3_HP at 10\u2077 cycles = 1,500 MPa (standard endurance limit). At 10\u00b9\u2070 cycles (gigacycle regime), the allowable reduces by approximately 20% to \u03c3_HP,10\u00b9\u2070 \u2248 1,200 MPa. The calculated contact stress at rated motor torque in a 9:1, M4, 4-planet stage at 200 kW: approximately 1,150\u20131,280 MPa \u2014 at the margin of the 10\u00b9\u2070 allowable, giving S_H = 0.94\u20131.04. This means 20CrMnTi may<\/strong> be adequate depending on the exact geometry, but the safety margin is very small and does not account for the uncertainty in the gigacycle extrapolation. 18CrNiMo7-6 deep carburized:<\/strong> allowable at 10\u00b9\u2070 cycles \u2248 1,400\u20131,450 MPa (higher endurance retained at gigacycle due to the improved core microstructure and deeper case depth). This gives S_H = 1.09\u20131.26 at the same calculated contact stress \u2014 a meaningful safety margin above the minimum, with adequate conservatism for the gigacycle extrapolation uncertainty. Cost premium:<\/strong> 18CrNiMo7-6 material costs approximately 20\u201330% more than 20CrMnTi in raw material. The total planet gear cost premium (including deep carburizing, which takes longer than standard carburizing for 20CrMnTi) is approximately 35\u201345% above the equivalent 20CrMnTi gear. For a 4-planet stage with 4 planet gears per stage \u00d7 2 stages = 8 planet gears total, this premium is typically EUR 80\u2013150 per vehicle drivetrain at production volumes \u2014 small relative to the total e-axle assembly cost. Korea Ever-Power recommends 18CrNiMo7-6 as the standard material for passenger EV planet gears at motor power above 150 kW, and 20CrMnTi only for EV platforms below 100 kW where the lower torque reduces the contact stress to safely below the 20CrMnTi gigacycle allowable.<\/p>\n<\/div>\n<\/div>\n

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Q 02<\/span><\/p>\n

Our EV development team has noticed gear whine at highway speed (100 km\/h, approximately 10,500 RPM motor speed) with the first prototype DIN 6 planetary gear set. What modifications would reduce the gear whine to an acceptable level?<\/p>\n<\/div>\n

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Gear whine at 10,500 RPM motor speed is characterised by a tonal noise at the planet mesh frequency \u2014 for a 4-planet, sun 16T, planet 20T ring 56T stage (ratio 4.5:1), the planet mesh frequency at 10,500 RPM sun is: f_mesh = 10,500\/60 \u00d7 16 = 2,800 Hz. This 2,800 Hz frequency is in the most sensitive range of human hearing (2,000\u20134,000 Hz, maximum sensitivity per ISO 226 equal loudness contours), which explains why even a small transmission error amplitude at this frequency is perceived as annoying. The modifications Korea Ever-Power recommends to reduce EV planetary gear whine from DIN 6 to the target NVH level: (1) Upgrade to DIN 5 profile ground:<\/strong> upgrading from DIN 6 (ground, typical profile form error F\u03b1 \u2264 5 \u03bcm) to DIN 5 (F\u03b1 \u2264 3.2 \u03bcm) reduces the primary TE contribution from profile error by 35\u201340%. At DIN 5 with \u00b12 \u03bcm planet pitch matching, Korea Ever-Power’s EV planetary gear sets typically show peak-to-peak dynamic TE below 8 \u03bcrad at 10,500 RPM \u2014 below the 15 \u03bcrad threshold for audible gear whine in the EV cabin. (2) Apply tooth flank crowning and lead modification:<\/strong> adding a longitudinal crowning (a slight barrel shape to the tooth face width, with the centre 3\u20135 \u03bcm higher than the edges) reduces the sensitivity of the gear contact to the misalignment that arises from bearing deflection at high speed and load \u2014 misalignment under load shifts the contact to one edge of the tooth face, increasing the dynamic TE above the static measurement value. (3) Balance the planet carrier:<\/strong> any dynamic imbalance of the rotating carrier assembly (carrier + 4 planet gears + bearings) produces a vibration at carrier rotation frequency that can excite the ring gear and housing structure at its natural frequencies. At 10,500 RPM sun speed with 4.5:1 ratio, the carrier rotates at 2,333 RPM \u2014 Korea Ever-Power dynamically balances all EV planetary carriers to G2.5 balance grade (per ISO 21940-11) to minimise carrier-imbalance-induced vibration. Korea Ever-Power can evaluate your specific geometry and provide a DIN 5 re-manufacture quotation with crowning and balance as part of the EV NVH improvement programme.<\/p>\n<\/div>\n<\/div>\n

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Q 03<\/span><\/p>\n

What is Korea Ever-Power’s supply model for EV planetary gear sets \u2014 can we source for prototype, validation, and production volumes from the same supplier, and what is the minimum quantity for competitive pricing?<\/p>\n<\/div>\n

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Korea Ever-Power’s EV planetary gear supply model covers all stages of the EV development cycle from single prototypes to mass production: Prototype phase (1\u201310 sets):<\/strong> Korea Ever-Power manufactures EV planetary gear sets in prototype quantities from the design specification \u2014 lead time 30\u201345 days from confirmed drawing for 18CrNiMo7-6 DIN 5 quality. Prototype pricing reflects the full per-set manufacturing cost without amortised tooling or batch efficiency. Each prototype set includes a dimensional inspection report, dynamic TE measurement, and material certificate \u2014 the same documentation as production hardware. Validation phase (10\u2013100 sets):<\/strong> lead time 25\u201335 days per batch; pricing reduced 20\u201330% from prototype level through batch efficiency on material procurement, heat treatment scheduling, and grinding setup. Korea Ever-Power treats validation-phase hardware with production-intent processes (same material, heat treatment specification, and grinding programme as will be used in production) \u2014 this ensures the validation test results represent production hardware performance, not prototype performance. Production phase (500+ sets\/year):<\/strong> Korea Ever-Power establishes a production commitment (annual volume estimate, scheduling, and call-off frequency) with the EV customer, enabling production tooling investments (dedicated grinding dressing programmes, material pre-orders, heat treatment scheduling blocks) that reduce the lead time to 15\u201320 days per call-off and the unit cost to 30\u201340% below the prototype price. Minimum order for competitive production pricing: 500 complete gear sets per year (approximately 2 gear sets per working day, which represents a compact production cell allocation at Korea Ever-Power). Quality traceability:<\/strong> all Korea Ever-Power EV planetary gear sets in production are supplied with full production traceability (heat treatment chart, grinding programme ID, CMM measurement file, TE measurement file) archived for 15 years \u2014 meeting automotive OEM supplier quality system requirements for product and process documentation retention over the vehicle model lifetime.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Explore Korea Ever-Power Gear Categories<\/h2>\n

Seven precision gear product lines for electric vehicles, e-axles, EV drivetrains, and high-speed precision power transmission worldwide.<\/p>\n<\/div>\n

\n
\"spur<\/p>\n
\n

Ingranaggi cilindrici<\/a><\/p>\n

EV auxiliary \u00b7 motor \u00b7 DIN 5\u20136<\/p>\n<\/div>\n<\/div>\n

\"helical<\/p>\n
\n

Ingranaggi elicoidali<\/a><\/p>\n

EV transmission \u00b7 e-axle \u00b7 low NVH<\/p>\n<\/div>\n<\/div>\n

\"hypoid<\/p>\n
\n

Ingranaggi conici<\/a><\/p>\n

EV differential \u00b7 AWD angle drive<\/p>\n<\/div>\n<\/div>\n

\"worm<\/p>\n
\n

Worm Gears<\/a><\/p>\n

EV steering \u00b7 seat \u00b7 self-lock<\/p>\n<\/div>\n<\/div>\n

\"ring<\/p>\n
\n

Corone dentate<\/a><\/p>\n

EV reduction ring \u00b7 e-axle DIN 5<\/p>\n<\/div>\n<\/div>\n

\"EV<\/p>\n
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Ingranaggi planetari<\/a><\/p>\n

EV reduction \u00b7 18CrNiMo7-6 \u00b7 DIN 5<\/p>\n<\/div>\n<\/div>\n

\"plastic<\/p>\n
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Plastic Gears<\/a><\/p>\n

EV sensor \u00b7 encoder \u00b7 resolver<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

\n
<\/div>\n

GET A QUOTATION \u00b7 KOREA EVER-POWER<\/p>\n

Need Planetary Gears for Electric Vehicles?<\/h2>\n

Korea Ever-Power manufactures 18CrNiMo7-6 deep case carburized planetary gear sets for EV reduction drives \u2014 M3\u2013M7, DIN 5\u20136, 4 planets per stage, \u00b11.5 \u03bcm planet pitch matching, dynamic TE certificate, gigacycle fatigue design to 10\u00b9\u2070 cycles. Passenger EV, electric truck e-axle, and 2-speed EV transmission variants. Prototype 1\u201310 sets in 30\u201345 days. Production 500+ sets\/year. Dynamic balancing to G2.5. ISO 9001:2015 certified.<\/p>\n

Request a Quotation \u2192<\/a><\/p>\n<\/div>\n

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

GEAR APPLICATION GUIDE \u00b7 PLANETARY GEAR \u00b7 P09 Planetary Gears for Electric Vehicles: EV Motor Reduction Drives, Two-Speed Transmissions and Electric Axle Gear Trains Electric vehicle planetary gear sets operate under conditions that differ fundamentally from conventional automotive transmission gears \u2014 the EV motor’s ability to produce maximum torque from zero RPM eliminates the need […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[4566],"tags":[],"class_list":["post-2044","post","type-post","status-publish","format-standard","hentry","category-application-of-gears"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/posts\/2044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/comments?post=2044"}],"version-history":[{"count":1,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/posts\/2044\/revisions"}],"predecessor-version":[{"id":2047,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/posts\/2044\/revisions\/2047"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media?parent=2044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/categories?post=2044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/tags?post=2044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}