EP-XL2440NK 4000W 24V Oil Pump Motor
The EP-XL2440NK is a 4000W, 24V electric oil pump motor built around a permanent magnet DC architecture designed specifically for the demanding duty cycle requirements of hydraulic power units on mobile equipment. Operating at a rated current of 205 A with a rated torque output of 13 N·m, this unit sits in the upper-power tier of the 24V oil pump motor category — a positioning that suits it for heavier lift platforms, higher-capacity tipper hydraulics, and specialised vehicle-mounted equipment where the 2200W class of motor would be thermally overloaded by the required duty cycle.
Rated for S2 10-minute and S3 20%ED intermittent duty cycles, the XL2440NK delivers more sustained on-time than the lighter 2200W models in this series while remaining within the thermal limits established by its Class F insulation winding and the convective cooling provided by the motor’s ribbed aluminium housing profile. The motor’s IP20 enclosure rating makes it appropriate for indoor hydraulic power unit applications and sheltered vehicle installations where direct water splash is not a risk.
Optional 12V and 48V voltage configurations are available, making this model a versatile platform for system designers who need a single motor frame across multiple vehicle electrical architectures.
Oil Pump Motor Series
EP-XL2440NK 4000W 24V Oil Pump Motor
A 4 kW permanent magnet DC series-wound oil pump motor rated at 205 A, engineered for heavy-duty vehicle power units, hydraulic lift platforms, boarding trucks, and specialised mobile equipment demanding sustained high-output DC drive performance.
Dane techniczne
The table below records the verified electrical, mechanical, and environmental parameters for the EP-XL2440NK oil pump motor. OEM integrators and maintenance engineers sourcing this unit as a direct oil pump motor replacement should cross-reference these parameters against the existing power unit's supply voltage, current capacity, pump coupling geometry, and mounting bracket dimensions before finalising the order.
| Oil Pump Motor Parameter | Value / Specification |
|---|---|
| Motor Model | XL2440NK |
| Rated Voltage (V) | 24 (optional: 12V, 48V) |
| Rated Power (W) | 4000 |
| Rated Current (A) | 205 |
| Rated Torque (N·m) | 13 |
| Duty Cycle | S2 10min – S3 20%ED |
| Insulation Class | F (max winding temp 155°C) |
| Waterproof Rating | IP20 |
| Tooth Number (Output Gear) | 9 |
| Rotation Direction | CW (Clockwise) |
| Body Diameter (mm) | ∅127 |
| Overall Length (mm) | 375 |
| Mounting Hole Pitch (mm) | 146 × 86.5 (bolt pattern per outline drawing) |
| Optional Configuration | 12V, 48V supply variants available |
| Scope of Application | Vehicle power units, lifts, boarding trucks, specialised equipment |
Zasada działania silnika prądu stałego
The XL2440NK operates on the permanent magnet DC motor working principle, extended to handle the 205 A current levels required for 4 kW output at 24V. The motor's stator carries a fixed-field arrangement of high-coercivity permanent magnets — either high-grade ferrite or rare-earth NdFeB depending on configuration — that establish a strong, stable magnetic field within the motor air gap. The wound armature sits on a steel lamination stack within this field; when current is supplied through the carbon brush and commutator assembly, each armature coil produces an electromagnetic force that the permanent field deflects into rotation.
The commutator performs the switching function that makes continuous rotation possible: as each armature coil crosses the magnetic neutral axis between poles, the commutator segments connected to that coil switch from one brush to the other, reversing current flow and maintaining a consistent torque direction. This mechanical commutation is what differentiates a brushed DC motor from a BLDC motor, which accomplishes the same function electronically. For a hydraulic oil pump motor application, the brushed permanent magnet DC motor's advantage is simplicity — a straightforward contactor-switching circuit can start, stop, and in some configurations reverse the motor without a dedicated motor controller, reducing system cost in basic lift gate and dock equipment designs.
At 4000W output, the XL2440NK operates at a power level where the armature current density and commutator peripheral speed are both significantly higher than in smaller oil pump motor designs. The commutator and brush system is dimensioned specifically for 205 A continuous rated current, with brush grade, contact pressure, and commutator bar width all set to manage the combination of current density and surface speed at this motor's operating point. The motor performance curve (RPM vs. torque, and efficiency vs. torque) confirms peak efficiency in the 50–80% load range, which aligns with the actual operating profile of a gear oil pump motor set driving a hydraulic circuit at pressures below maximum relief pressure for most of the duty cycle.
Pięć kluczowych zalet produktu
4 kW Output in a 24V Frame
Delivering 4000W at 24V DC — a supply voltage found across the heavy truck, trailer, and mobile equipment sectors worldwide — the XL2440NK offers a power density level that makes it suitable for lift platforms and vehicle hydraulic circuits where lower-power 24V motors would be thermally overloaded. The 13 N·m rated torque puts it in the range of gear oil pump motor sets serving hydraulic circuits at pressures up to and beyond 200 bar in properly matched pump configurations.
Extended Duty Cycle Rating
The S2 10-minute and S3 20%ED duty cycle ratings of the XL2440NK represent a meaningful step up from the 2-minute and 10%ED ratings common in lighter 24V oil pump motors. For applications with longer actuation cycles — extended-reach scissor lifts, multi-stage boarding bridge extensions, or high-frequency dock leveller operations — this expanded duty cycle headroom reduces the risk of thermal shutdown events during peak production periods that disrupt throughput.
Multi-Voltage Optional Configuration
The availability of 12V and 48V variants in the same XL2440NK mechanical frame allows OEM assemblers to standardise their structural and hydraulic pump coupling design across multiple product voltage variants — a significant engineering advantage that reduces tooling cost, simplifies spare parts management, and enables a single assembly line to build for different market electrical standards across the USA, UK, European, and Australian markets without redesigning the hydraulic power unit enclosure.
Class F Thermal Headroom
Class F insulation, rated to 155°C maximum winding temperature, provides a substantial margin above the steady-state winding temperature generated during the S3 20%ED duty cycle at rated load. This thermal headroom is particularly relevant in high-ambient-temperature operating environments — Australian summer surface operations, Middle Eastern vehicle fleets — where ambient air temperatures reduce the available temperature differential between the winding and the cooling air, making the insulation rating a directly operative constraint rather than a conservative safety margin.
Standard 9-Tooth Pump Coupling
The factory-standard nine-tooth output gear coupling is dimensionally compatible with the gear interface used across the majority of hydraulic gear pump assemblies in the 4 kW power class. This direct compatibility reduces the integration burden for OEM assemblers and eliminates the need for intermediate couplings or adaptor sleeves in most standard oil pump motor set configurations, which in turn reduces coupling backlash, misalignment risk, and overall assembly length relative to adapter-coupled alternatives.
Materials and Construction Quality
The EP-XL2440NK's construction reflects the requirements of a 4 kW, 205 A continuous-rated DC electric motor intended for vehicle-mounted and industrial hydraulic service. The motor housing is precision-cast aluminium alloy — a material choice that delivers the rigidity needed to maintain shaft bearing alignment under the combined radial and axial loads of the hydraulic pump drive gear while keeping the overall motor assembly weight within the mass budgets of mobile vehicle installations. Cast aluminium's thermal conductivity also plays a functional role: heat generated by resistive losses in the armature winding conducts through the shaft and lamination stack to the housing, where the ribbed external surface increases convective heat dissipation to the surrounding air.
The armature core is constructed from stamped silicon steel laminations, each coated with an insulating layer to suppress eddy current circulation. At 4000W output, eddy current and hysteresis losses in the armature core represent a meaningful fraction of total power loss; the lamination design — thickness, silicon content, and slot geometry — is optimised to minimise these losses within the dimensional constraints of the motor frame. The armature winding uses high-conductivity copper wire, with conductor cross-section and winding configuration selected to carry 205 A within the slot fill factor while maintaining adequate mechanical integrity against the centrifugal forces at the motor's operating speed range.
The commutator uses silver-bearing copper alloy bar stock to promote stable film formation at the brush contact surface — a property that is more critical at 205 A than at lower current ratings because the brush-to-commutator interface is operating closer to its thermal limit and any deterioration in the contact film quality leads to accelerated arc erosion. The carbon brush compound is specified for this current and speed combination, with brush spring pressure set to maintain adequate contact force through the brush wear life without excessive friction that would raise commutator surface temperature. Permanent magnets in the stator assembly are retained by a system designed to maintain field strength and positional accuracy over the full thermal cycling range expected from the S3 duty cycle operation.
Scenariusze zastosowań
The EP-XL2440NK 4000W 24V oil pump motor is suited to hydraulic power unit applications that require higher output power, longer duty cycles, or heavier rated loads than the 2200W class can support. Its multi-voltage option also extends its applicability across a wider range of vehicle and industrial system architectures than single-voltage models allow.
Heavy-Capacity Vehicle Power Units
Truck-mounted hydraulic power units for tipper bodies, hook-lift systems, and tail-lift platforms with rated capacities above 1,000 kg typically require a hydraulic oil pump motor in the 4 kW class to generate adequate system pressure within the cycle time constraints of a production loading or unloading operation. The XL2440NK's 24V rating aligns with heavy truck electrical systems, and its 13 N·m output torque supports gear pump operation at the elevated system pressures required by larger cylinders and longer stroke actuators.
High-Rise Scissor Lifts and Personnel Platforms
Battery-powered elevated work platforms with extended-height scissor mechanisms require more hydraulic energy per lift cycle than compact warehouse pickers because the cylinder volume displaced and the load height are both greater. The XL2440NK's S3 20%ED duty rating and 10-minute S2 rating provide the operating time margin for extended-height lifts without requiring an oversized battery pack to manage duty cycle thermal limits, making it a practical choice for 48V system designs when the optional 48V configuration is specified.
Boarding Trucks and Jet-Bridge Systems
Airport ground support equipment with larger platform dimensions and heavier tare weights places greater demand on the hydraulic oil pump motor set than lighter boarding stair designs. The XL2440NK handles the higher pump flow rate and system pressure required to extend and retract large boarding bridge assemblies under full passenger and structural load, including the elevated hydraulic pressure demand during alignment against aircraft door sill height in gusty wind conditions.
Industrial Hydraulic Presses and Clamping Systems
Stationary industrial equipment — press brakes, stamping presses, welding fixture clamps, and die-casting ejector circuits — that use a self-contained 24V hydraulic power unit rather than a fixed-displacement pump driven by an AC induction motor can take advantage of the XL2440NK's high-power DC electric motor output to achieve the clamping and pressing forces required for medium-capacity tooling without connecting to three-phase mains power, which simplifies installation in smaller workshops across European and North American markets.
Compatible Companion Products
The EP-XL2440NK oil pump motor is designed for system integration alongside compatible electric motors and reduction gear units. To support complete drivetrain sourcing from a single supply point — reducing lead time variability, simplifying warranty management, and ensuring dimensional interface compatibility — we manufacture the full range of DC electric motors and worm gear reducers that pair with this unit across different application architectures.
Silniki elektryczne
We supply a full range of electric motors — covering brushed DC, BLDC, and variable-voltage DC servo motor configurations — that complement the XL2440NK in multi-motor hydraulic and electromechanical system designs. All motor frames are dimensioned for direct coupling to our standard gear and pump interfaces.
Przekładnia ślimakowa
Our worm gear reducer range provides speed reduction and torque multiplication where the XL2440NK's output speed is higher than required by the driven shaft or where the motor torque must be amplified for a slow-speed, high-force linear actuator application. Browse the worm gearbox range for input flange options compatible with the XL2440NK output geometry.
O nas
Backed by more than ten years of mechanical engineering and manufacturing experience, our ISO 9001:2015 certified production facility covers a product range that spans agricultural gearboxes, worm gear reducers, planetary drive units, PTO shafts, hydraulic cylinders, transmission gears, roller chains, and DC electric motors. Our design and production teams handle both catalogue-standard products and custom-engineered assemblies, working in materials including ductile iron, cast iron, cast steel, precision investment-cast steel, and aluminium alloy depending on the structural and weight requirements of the application.
In-house manufacturing capabilities include CNC turning, milling, gear hobbing, deep-hole boring, and surface treatment, supported by CMM dimensional inspection and electrical load testing for motor products. This vertical integration — from raw casting to finished tested component under one quality management system — allows us to maintain consistent production quality and respond to custom specification requests from OEM customers in North America, Europe, Australia, and Southeast Asia without extended third-party sub-supply lead times.
Warsztat
Często zadawane pytania
What makes the EP-XL2440NK different from a standard small oil pump motor in a 24V lift application?▼
The XL2440NK is a 4000W, 205 A permanent magnet DC motor, roughly double the power rating of a typical small oil pump motor in the 2000–2200W class. This higher power output allows it to drive gear oil pumps at elevated system pressures and flow rates, which directly translates to faster lift times and the ability to raise heavier rated loads within acceptable cycle times. It also carries a longer duty cycle rating — S3 20%ED versus the 10%ED of lighter models — which matters for lift applications with frequent short raises, such as high-cycle dock levellers or assembly-line work platforms in European and North American manufacturing facilities.
How do I source a reliable oil pump motor replacement for a 4 kW 24V hydraulic power unit on a truck tail-lift system in the UK or Europe?▼
When sourcing a replacement electric oil pump motor for a 4 kW, 24V truck tail-lift in the UK or European market, the primary dimensional checks are overall motor length, body diameter, mounting bolt pattern, and output shaft tooth geometry. For the XL2440NK, the body diameter is 127 mm, the overall length is 375 mm, the output gear has 9 teeth, and the rotation is clockwise. These dimensions need to be matched against the existing mounting bracket and pump coupling on the tail-lift power unit before ordering. Additionally, confirm that your motor controller or contactor circuit is rated for 205 A continuous — this is the rated current of the XL2440NK oil pump motor and represents a significant step up from the 125 A rating of the 2200W class motors commonly used in lighter tail-lift applications.
Which voltage variant of the XL2440NK oil pump motor set is the best fit for a 48V battery-powered scissor lift platform in Australia?▼
For a 48V battery-powered scissor lift in Australia, the optional 48V configuration of the XL2440NK oil pump motor is the correct selection. At 48V supply, the same motor frame delivers the rated 4000W output at approximately half the armature current of the 24V version, which reduces cable conductor cross-section requirements, improves system efficiency at the supply side, and reduces voltage drop losses across the battery connection cables. Australian elevated work platform regulations require battery-powered lift platforms to meet specific performance criteria under rated load; the XL2440NK oil pump motor's duty cycle rating and output torque are consistent with meeting these lift speed and capacity requirements when correctly matched to the hydraulic pump displacement and cylinder sizing.
What is the difference between a permanent magnet DC motor and a BLDC motor when used as a hydraulic oil pump motor in industrial equipment?▼
Both a permanent magnet DC motor and a brushless DC (BLDC) motor use permanent magnets in the stator, but they differ in how the armature current is commutated. A brushed DC motor — such as the XL2440NK — uses a mechanical commutator and carbon brush assembly to switch armature current, which means the motor can be started and controlled with a simple contactor circuit or basic PWM controller. A BLDC motor requires an electronic controller that switches the phase currents based on rotor position feedback from Hall effect sensors or encoder signals. For hydraulic oil pump motor applications in industrial equipment where cost, simplicity of replacement, and compatibility with existing contactor wiring are priorities — as is common in USA and European industrial maintenance environments — the brushed permanent magnet DC motor remains the dominant choice. BLDC motors become more attractive where brush maintenance is difficult or where higher efficiency at partial load is a system design priority.
Where can I find a high torque DC motor assembly for a boarding truck hydraulic power unit in the Middle East or Southeast Asian market?▼
For boarding truck hydraulic oil pump motor supply in the Middle East or Southeast Asian markets, the EP-XL2440NK is available for direct export with full technical documentation including motor performance data sheets, wiring diagrams, dimensional drawings, and ISO 9001:2015 quality certification. When evaluating this motor for boarding truck applications in high-ambient-temperature environments — common across the Gulf region and South and Southeast Asia — note that the Class F insulation provides a thermal margin that supports reliable operation at elevated ambient temperatures, though the duty cycle may need to be conservatively derated compared to operation in temperate climates if ambient temperatures consistently exceed 45°C.
Redaktor: PXY
