KRACHT Drive Technology Series

Overview

The KRACHT Drive Technology Series is KRACHT GmbH’s hydraulic motor division, built around the KM series of external gear motors that convert hydraulic power back into rotating mechanical drive. Unlike KRACHT’s pump technology division, which converts mechanical input into hydraulic flow, or the valve and fluid measurement divisions, which regulate and measure that flow, the Drive Technology Series closes the loop by turning pressurised hydraulic fluid into usable rotary output for fans, auxiliary drives, and mobile or stationary machinery. The KM series is currently the documented family within this division on KRACHT’s own product programme, and it covers a wide displacement range within a single, well-proven external gear architecture rather than spanning multiple distinct product families the way the pump and valve divisions do.

With fast quotation turnaround and technical support, Seven Star LLC supplies the KRACHT Drive Technology Series to industrial, marine, construction and agricultural equipment customers across Oman and the wider GCC. Whether a project needs a compact gear motor for a fan drive or a larger-displacement unit for a mobile hydraulic power pack, Seven Star LLC’s technical team helps confirm displacement, pressure and mounting compatibility, and backs every KM series motor with genuine KRACHT warranty and regional technical support.

Operating Principle

KM series motors in the KRACHT Drive Technology Series operate on the external gear principle in reverse of a gear pump: pressurised hydraulic fluid is directed into the meshing gear chambers, and the pressure differential across the gear set forces the gears to rotate, converting hydraulic energy into mechanical torque and rotational speed at the output shaft. Because displacement per revolution is fixed by the gear geometry, output speed is directly proportional to input flow and output torque is directly proportional to the pressure differential across the motor, giving predictable, linear performance across the motor’s rated speed and pressure range.

A key engineering refinement in the KM series is hydraulic axial clearance compensation, which automatically adjusts the running clearance between the gears and the side plates as operating pressure changes, maintaining volumetric efficiency and minimising internal leakage across a wide pressure range rather than only at a single design point. This is what allows the KM series to handle dynamic loads and pressure peaks reliably in duty cycles – such as fan drives and mobile equipment – where load and speed vary continuously rather than holding steady at one operating point, a core benefit of the KRACHT Drive Technology Series.

Engineering Design of the KRACHT Drive Technology Series (KM Series)

KM series motors are built with precision-machined steel gear sets and housings sized across a displacement range of 5.5 to 300 cm³/rev, rated to a maximum operating pressure of 400 bar and a temperature range of −20°C to 150°C, giving the series enough span to cover both compact auxiliary drives and higher-torque primary drive applications from a single product family. Shaft sealing and bearing arrangements are selected to handle the radial and axial loads typical of direct-coupled fan and pump-drive applications, and standard SAE or DIN mounting flanges allow the motors to be integrated into existing hydraulic circuits without custom adaptation.

For applications requiring more torque or flow capacity than a single unit provides, KM series motors can be mechanically coupled in groups of up to six units, allowing multiple motors to be driven from a common hydraulic supply through flow dividers – a configuration used in multi-fan cooling arrays and other applications needing several synchronised drive points. ATEX-certified variants are available for use in hazardous-area installations such as oil and gas processing environments, and noise-optimised variants reduce operating sound levels for applications where motor noise is a design constraint, such as enclosed equipment cabins or noise-sensitive industrial sites, broadening the KRACHT Drive Technology Series beyond a single fixed configuration.

Key Features

The KRACHT Drive Technology Series brings a focused set of engineering strengths to hydraulic drive applications:

• External gear motor design with hydraulic axial clearance compensation maintains volumetric efficiency across a wide operating pressure range.
• Displacement range of 5.5 to 300 cm³/rev covers compact auxiliary drives through to higher-torque primary drive applications in one product family.
• Maximum operating pressure of 400 bar supports demanding mobile and stationary hydraulic circuits.
• Temperature rating from −20°C to 150°C suits both cold-climate startup and continuous high-temperature duty.
• Motors can be coupled in groups of up to six units via flow dividers for multi-point synchronised drive applications such as fan arrays.
• ATEX-certified variants are available for hazardous-area installations, including oil and gas processing environments.
• Noise-optimised variants reduce operating sound levels for cabin-mounted or noise-sensitive equipment.
• Robust construction supports dynamic loads and pressure peaks typical of construction, agricultural and municipal equipment duty cycles.

Industrial Applications

The KRACHT Drive Technology Series is deployed across mobile and stationary equipment wherever hydraulic power needs to be converted back into rotary mechanical drive: fan drives on construction and agricultural machinery, auxiliary drive systems on municipal and special-purpose vehicles, and motor-pump units used for mobile liquid transfer. Sizing and specification require attention to duty cycle, mounting orientation and coupling arrangement – considerations that plant engineers and equipment integrators in Oman and the GCC increasingly need local technical support to work through, particularly for multi-motor flow-divider installations and ATEX-rated hazardous-area applications common on oil and gas sites in the region, where the KRACHT Drive Technology Series is regularly specified.

With regional stock and engineering support in Muscat, Seven Star LLC distributes the KRACHT Drive Technology Series to equipment integrators, construction and agricultural machinery operators, and industrial plant engineers throughout Muscat, Sohar, Salalah and the wider Sultanate, as well as neighbouring GCC markets, ensuring genuine KM series motors, correct displacement and pressure sizing guidance, and regional after-sales support are available locally rather than through a distant intermediary.

Technical Specifications

The KM series is the KRACHT Drive Technology Series family currently documented on the manufacturer’s own hydraulic motors programme:

Seven Star LLC also supplies the KRACHT KM Series Hydraulic Gear Motor as an individual standalone product for customers who have already identified their required displacement and pressure rating within the KRACHT Drive Technology Series.

Call To Action

To specify the correct KM series configuration from the KRACHT Drive Technology Series for your fan drive, auxiliary drive or mobile hydraulic application, submit a formal RFQ for the KRACHT Drive Technology Series to Seven Star LLC’s instrumentation and fluid technology division. Backed by genuine manufacturer documentation, Seven Star LLC maintains regional stock visibility, coordinates factory lead times for standard, ATEX-certified and noise-optimised KM series motors, and provides technical datasheets and sizing support so your project team can move from enquiry to installation with genuine KRACHT hardware and full manufacturer warranty.