Addressing Torque Instability in Swedish Material Handling Systems: Application of KM1 Low-Speed High-Torque Hydraulic Motors

Industry Background: Why Torque Instability Occurs

In Swedish material handling, wood processing, warehouse automation, and conveyor equipment, hydraulic motors are often used for low-speed, high-torque drive tasks. These systems require smooth starting, reversible operation, and consistent speed under variable load.

Torque fluctuation may occur when conveyors operate under low-speed load, frequent start-stop cycles, changing back pressure, or limited installation space.

Key Selection Points for KM1 Series

The KM1 Series is a low-speed high-torque hydraulic motor designed with a compact distribution shaft and gerotor structure. According to the PDF, it features compact size, high power density, reliable shaft sealing for higher back pressure, series/parallel circuit compatibility, reversible rotation, stable speed, and multiple shaft, flange, and port options.

Displacement Range

KM1 covers 50–400 ml/r, allowing selection based on conveyor load, target speed, system flow, and required torque.

Pressure and Torque

The series provides continuous pressure up to 12.5 MPa, intermittent pressure up to 16.5 MPa, continuous torque from about 81–435 N·m, and intermittent torque up to 533 N·m. This positions KM1 for medium-load conveyor systems rather than extreme heavy-duty final drive applications.

Working Condition Limits

The PDF recommends avoiding operation at maximum speed and maximum pressure at the same time. It also defines the preferred working range as 1/3–2/3 of continuous operating conditions, which is important for conveyor duty-cycle evaluation.

Application Value in Sweden

For Swedish conveyor systems facing low-speed torque fluctuation, KM1 offers practical value through structure-to-condition matching.

Smoother Low-Speed Output

Its gerotor and distribution shaft design supports stable low-speed rotation for conveyors, rollers, and light-to-medium chain drives.

Flexible OEM Integration

Multiple shaft, flange, and port configurations help equipment manufacturers manage replacement projects and compact installation layouts.

Suitable for Medium Continuous Duty

With oil temperature up to 80°C, recommended oil viscosity of 37–73 cSt, and fluid cleanliness of ISO 18/13, KM1 can support consistent operation within defined hydraulic conditions.

Selection Guidance

For Swedish material handling equipment, KM1 selection should begin with load torque, target RPM, system flow, pressure margin, back pressure, and mounting interface. For torque instability issues, engineers should first verify displacement, pressure reserve, and oil cleanliness rather than simply choosing a larger motor.