KRACHT KM Series Hydraulic Gear Motor
Overview
The KRACHT KM series is a range of external gear motors engineered by KRACHT GmbH for the toughest hydraulic drive applications in mobile and stationary equipment. Covering a displacement range from 5.5 to 300 cm³/rev, the KM series converts hydraulic flow into reliable rotary mechanical power for fan drives, auxiliary drives, and traction applications where continuous vibration, pressure spikes, and high dynamic loading are the operating norm rather than the exception. Built around a robust housing and flange-cover architecture with hydraulic axial clearance compensation, the KRACHT KM external gear motor holds its volumetric efficiency over a long service life, even when subjected to repeated pressure-peak cycling in construction and agricultural machinery.
Backed by genuine manufacturer documentation, Seven Star LLC proudly supplies the KM series hydraulic gear motor to hydraulic system builders, plant maintenance teams, and mobile equipment OEMs throughout Oman and the wider GCC. Facility engineers in Muscat, Sohar, and Salalah can source KRACHT drive technology with engineering support through Seven Star LLC – useful for contractors and fleet operators who need dependable hydraulic motors with a formal quotation and the manufacturer datasheet.
Operating Principle
The KRACHT KM hydraulic gear motor operates on the external gear principle: pressurized hydraulic fluid enters the housing and acts on two meshing gears, forcing them to rotate and transmitting torque to the output shaft as the fluid is displaced from the inlet side to the outlet side of the gear set. Because the motor is a fixed-displacement design, output speed is directly proportional to the flow rate supplied by the hydraulic pump, while output torque is a function of the pressure differential across the motor. Hydraulic axial clearance compensation automatically adjusts the running clearance between the gears and the side plates as the unit wears in, maintaining volumetric efficiency and minimizing internal leakage across the motor’s service life rather than allowing efficiency to degrade as gaps open up.
The KM series is engineered specifically for high dynamic loading, meaning the gear set, bearings, and housing are all rated to absorb the pressure spikes and rapid load reversals typical of construction machinery, agricultural vehicles, and fan-drive duty cycles. Operating pressures up to 400 bar and a temperature range of −20°C to 150°C give the motor a wide practical envelope, allowing it to run in ambient extremes from cold-start winter operation to sustained high-temperature duty near engine bays and hydraulic power packs. The practical consequence for the equipment designer is a compact, self-contained drive unit that delivers consistent torque and speed without the complexity of a separate gearbox or clutch assembly.
Engineering Design of the KRACHT KM
The KRACHT KM external gear motor is built around a modular housing and flange-cover assembly designed for straightforward integration into existing hydraulic circuits. The modular architecture allows various valve integration options to be fitted directly to the motor body, and units can be mechanically coupled in groups of up to six via a flow divider arrangement, enabling synchronized multi-motor drives for applications such as multi-wheel traction systems or ganged fan arrays without external timing hardware. Standard mounting flanges and shaft configurations are compatible with common industrial coupling and bracket hardware, simplifying retrofit into both new-build and existing equipment platforms.
For applications requiring additional load capacity, the KM series is available with outboard bearing assemblies that absorb radial and axial loads independently of the internal gear bearings, extending service life where belt tension, chain drive, or overhung loads would otherwise be transmitted directly into the motor. Noise-optimized variants reduce operating sound levels for cab-adjacent and enclosed-compartment installations, while motor-pump coupling configurations allow the KM motor to be directly flange-mounted to a matching KRACHT gear pump for compact combined power-transfer units. ATEX-certified versions extend the KM series into hazardous-area duty for oil, gas, and chemical-handling equipment.
Key Features
Engineers evaluating the KRACHT KM series against competing external gear motors will find the following features decisive. The KRACHT KM hydraulic gear motor is engineered to deliver dependable rotary power across a wide range of mobile and stationary hydraulic applications. Its key features include:
- Wide displacement range of 5.5 to 300 cm³/rev, covering small auxiliary drives through to heavy-duty traction and fan-drive applications.
- Maximum operating pressure of 400 bar, suited to demanding mobile and industrial hydraulic circuits.
- Hydraulic axial clearance compensation that maintains volumetric efficiency and limits internal leakage over the motor’s service life.
- Engineered for high dynamic loading, with the gear set and housing rated for continuous vibration and pressure-spike resistance.
- Modular housing and flange-cover design supporting various valve integration options for direct circuit integration.
- Capability to couple up to six motor units together via a flow divider for synchronized multi-motor drive systems.
- Wide operating temperature range of −20°C to 150°C for reliable performance across seasonal and regional climate extremes.
- Available with ATEX certification and noise-optimized variants for hazardous-area and cab-adjacent installations.
Industrial Applications
The KRACHT KM series hydraulic gear motor is deployed wherever a compact, robust rotary drive is needed under demanding pressure and load conditions. Typical duties include fan drives for engine cooling and radiator systems on construction machinery and agricultural vehicles, auxiliary drive functions on mobile plant such as augers, conveyors, and winches, traction drive assistance on tracked and wheeled equipment, and rotary actuation in municipal and specialized vehicles where continuous vibration and frequent load reversal would quickly degrade a lower-rated motor. When coupled in groups via a flow divider, the KM series also supports synchronized multi-point drive systems used in bulk material handling and multi-axle traction applications across heavy industrial and construction fleets.
Working closely with plant engineers in the region, Seven Star LLC supplies the KM series hydraulic gear motor to hydraulic workshops, construction equipment dealers, agricultural machinery importers, and industrial plant operators across Oman and the GCC, including the industrial zones of Sohar and Salalah. Regional contractors and OEMs building or maintaining mobile hydraulic equipment can source genuine KRACHT gear motors, technical support, and compatible pump and valve components locally, reducing lead times for new equipment builds and urgent field replacements throughout the Sultanate of Oman.
Technical Specifications
Engineers specifying the KRACHT KM series hydraulic gear motor for a new installation should reference the table below, which summarizes the principal specifications of the KRACHT KM series; exact displacement and configuration vary by ordered model.
| Parameter | Specification |
|---|---|
| Model | KRACHT KM Series |
| Motor Type | External gear motor, fixed displacement |
| Displacement Range | 5.5 – 300 cm³/rev |
| Maximum Operating Pressure | Up to 400 bar |
| Operating Temperature | −20°C to 150°C |
| Clearance Compensation | Hydraulic axial clearance compensation |
| Multi-Motor Coupling | Up to six units via flow divider |
| Available Options | ATEX certification, noise-optimized variants, outboard bearing assemblies, motor-pump coupling configurations |
| Typical Applications | Fan drives, construction machinery, agricultural vehicles, mobile and stationary hydraulic equipment |
Request a Quote for KRACHT KM Series
Ready to order the KRACHT KM series hydraulic gear motor for your equipment or fleet? Seven Star LLC supports formal RFQ submissions, technical datasheet requests, and availability and lead-time inquiries for the KRACHT KM series. With fast quotation turnaround and technical support, our instrumentation and hydraulic drive division can advise on displacement selection, pressure rating, and ATEX certification requirements for your specific installation. Contact Seven Star LLC today to request a formal quotation, technical datasheet, or to discuss availability and lead time for the KM series hydraulic gear motor and full KRACHT drive technology range across Muscat, Sohar, Salalah, and the wider Sultanate of Oman.
Browse the full KRACHT range or see more Pumps products supplied by Seven Star LLC in Oman and the GCC.
- Brochure KRACHT Product Overview Brochure Download
KRACHT pumps, flow meters and valves listed
The listing follows four product groups, pumps, fluid measurement, valves and drives:- Pump technology: KF gear pumps for transfer of lubricating and other fluids, the KF-F version for fuels, and KP high pressure gear pumps
- Fluid measurement technology: gear type flow meters such as the VCA in aluminum
- Valve technology: SPV and SPVF pressure relief valves, the DBD directly controlled poppet valve, HV and HVF pilot operated valves and the DV B hydraulically pilot controlled valve
- Drive technology: KM hydraulic gear motors
Where KRACHT equipment is used
KRACHT equipment serves the marine, renewable energy, process technology and hydraulics industries. In practice that means lube oil and fuel oil transfer on engines, gearboxes and compressors, oil supply units, and metering of oils, resins, paints and other viscous media with gear flow meters in dosing and test bench systems. Enquiries from the GCC are mostly for a KRACHT pump or valve fitted to an imported machine or a ship's auxiliary system.Ordering KRACHT parts: what we need
KRACHT products carry a type key on the nameplate that encodes size, direction of rotation, shaft end, housing and seal material, connections and special numbers. An example from this page is SPV 10 L1G 1 A 12. Send the complete key and the serial or order number shown with it. If the plate is damaged, send the fluid and viscosity, flow rate, operating pressure and temperature, drive speed, port type and size, and photos with main dimensions. For KRACHT flow meters add the measuring range and the pickup or electronics required. We compare the key with KRACHT documentation and supply the manufacturer's data sheet on request.Browse KRACHT products by category: Safety Relief Valves, Pumps, Flowmeters, Electromotors.
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