Manufacturer of Slewing Motors for Mini Excavators – KSD Series: Full Range of Models Available, Customization Offered

KSD Series Hydraulic Slewing Motor for Mini Excavators

1. Product Overview – Compact Hydraulic Swing Drive for Mini Excavators

The KSD Series Hydraulic Slewing Motor, also known as a hydraulic swing motor, is specifically designed for slewing drive systems in compact construction machinery, including mini excavators.

Based on the KM5 motor design, the KSD Series combines reinforced structural components with integrated hydraulic valves to address the operating requirements of compact excavator swing systems.

In residential construction, landscaping, trenching and small-scale earthmoving, mini excavators frequently perform repeated upper-structure rotation within confined working spaces. The slewing motor must therefore match the machine's hydraulic parameters, mechanical load and installation dimensions.

The KSD Series offers four displacement options: 160, 195, 245 and 305 cc/r, with a maximum speed of 80 RPM. This range provides equipment manufacturers and hydraulic system integrators with multiple configurations for different slewing drive requirements.

2. Key Features – Reinforced Structure and Integrated Valve Design

Reinforced Bearings for Higher Radial Load Capacity

The KSD Series adopts reinforced bearings designed to withstand higher radial forces during operation. This structure is particularly relevant to slewing systems where mechanical loading and installation conditions must be considered together.

Reinforced Coupling for Demanding Working Conditions

An enhanced coupling structure helps the motor accommodate more demanding operating conditions. It is an important consideration when matching the hydraulic motor with the excavator's mechanical slewing transmission.

Integrated Relief Valve and Charge Valve

The motor incorporates an imported relief valve to help reduce pressure-related noise during operation. An integrated charge valve helps prevent the motor from drawing in air during operation.

These integrated valve functions support hydraulic circuit operation and should be considered when evaluating the motor's compatibility with the overall hydraulic system.

Multiple Displacement and Gear Configurations

The KSD Series provides four displacement options and multiple output gear parameters.

Available gear specifications include:

• Gear module: 4 / 4.5 / 5

• Number of teeth: 11 / 12 / 13 / 14

• Pressure angle: 20°

The output gear can also be manufactured according to customer requirements, subject to technical confirmation.

3. Technical Specifications and Selection Guide

Choosing a hydraulic slewing motor involves more than comparing displacement values. OEM engineers should evaluate output torque, rotational speed, relief valve settings, gear compatibility and mounting interfaces.

What Should You Confirm Before Ordering?

1. Required output torque: Evaluate the excavator's upper-structure weight, slewing resistance and operating load.

2. Rotational speed: Check the required slewing speed and the hydraulic flow available from the machine.

3. Gear compatibility: Confirm the gear module, tooth count, pressure angle and mating gear dimensions.

4. Hydraulic circuit: Verify working pressure, relief valve setting and charge valve requirements.

5. Installation dimensions: Check the mounting flange, shaft connection, oil ports and available installation space.

Correct motor selection requires matching both hydraulic performance and mechanical interfaces.

4. Applications, Customization and Ordering Support

Typical Applications

The KSD Series Hydraulic Slewing Motor is suitable for hydraulic swing drive applications in:

• Residential mini excavators

• Garden and landscaping excavators

• Compact construction machinery

• Small-scale earthmoving equipment

• Mini excavator upper-structure rotation systems

For European and North American equipment manufacturers, matching the motor to different machine platforms is an important part of equipment integration.

Customization for Different Equipment Designs

Different mini excavator manufacturers may use different gear interfaces, mounting dimensions and hydraulic port arrangements.

KEYSTONE supports product configuration discussions based on customer application requirements. Output gear specifications can be manufactured according to customer requirements following technical confirmation.

Before placing an order, customers are encouraged to provide equipment drawings, existing motor specifications or interface measurements.

Request a KSD Series Hydraulic Motor Solution

Looking for a hydraulic swing motor for your mini excavator?

Contact SHANDONG KEYSTONE HYDRAULIC CO., LTD to discuss displacement selection, output gear specifications, mounting compatibility and hydraulic circuit requirements.

Send us your application details to obtain suitable model recommendations and a quotation.