GM5 Hydraulic Motor GM5-25-1H15F-20 GM5-5-1H15F-20 GM5-10-A13R-23 GM5-5 GM5-6 GM5-8 GM5-10 GM5-12 GM5-16 GM5-20 GM5-25

Comprehensive Analysis of GM5 Series Hydraulic Motors (Including Model Meanings, Core Parameters, and Application Scenarios)
The GM5 series hydraulic motors are high-performance, high-pressure gear motors, featuring compact structure, high efficiency, and
strong reliability. They are widely compatible with industrial machinery and hydraulic systems. The following provides a detailed
explanation of the series models (including GM5-25-1H15F-20, GM5-5-1H15F-20, etc.) from four key dimensions: model decoding, core
parameters, structural features, and application scenarios.
I. Model Coding Rules (Taking GM5-XX-XXXX-XX as an Example)
The GM5 series model consists of 8 core parts, with each field having a clear meaning, enabling quick identification of product

Typical Model Disassembly
* GM5-5-1H15F-20: Nominal displacement 5.2ml/r, diamond flange (Φ80), with front bearing, SAE involute spline shaft extension,
flanged oil port, design number 20.
* GM5-10-A13R-23: Nominal displacement 10.0ml/r, SAE standard diamond flange (Φ82.55), with front bearing, parallel key
cylindrical shaft extension (Φ19.05), G1/2 pipe thread oil port, design number 23.
* GM5-25: Basic model, nominal displacement 25.0ml/r, default configuration without front bearing, bidirectional rotation,
standard flange and oil port (non-standard configurations require customization).

II. Core Performance Parameters (Full Specification Comparison)
The GM5 series covers 8 core displacement specifications, with key parameters as follows:

* GM5-5: Nominal displacement 5.2ml/r; rated pressure 20MPa; rated speed 4000r/min; minimum speed 800r/min; theoretical torque
16.5N·m; weight 1.9kg (without bearing)/2.6kg (with bearing).
* GM5-6: Nominal displacement 6.4ml/r; rated pressure 21MPa; rated speed 3800r/min; minimum speed 700r/min; theoretical torque
21.4N·m; weight 2.0kg (without bearing)/2.7kg (with bearing).
* GM5-8: Nominal displacement 8.1ml/r; rated pressure 21MPa; rated speed 3600r/min; minimum speed 650r/min; theoretical torque
27.1N·m; weight 2.1kg (without bearing)/2.8kg (with bearing).
* GM5-10: Nominal displacement 10.0ml/r; rated pressure 21MPa; rated speed 3500r/min; minimum speed 600r/min; theoretical torque
33.4N·m; weight 2.2kg (without bearing)/2.9kg (with bearing).
* GM5-12: Nominal displacement 12.6ml/r; rated pressure 20MPa; rated speed 3600r/min; minimum speed 550r/min; theoretical torque
42.1N·m; weight 2.3kg (without bearing)/3.0kg (with bearing).
* GM5-16: Nominal displacement 15.9ml/r; rated pressure 20MPa; rated speed 3300r/min; minimum speed 500r/min; theoretical torque
53.2N·m; weight 2.4kg (without bearing)/3.1kg (with bearing).
* GM5-20: Nominal displacement 19.9ml/r; rated pressure 20MPa; rated speed 3100r/min; minimum speed 500r/min; theoretical torque
63.4N·m; weight 2.5kg (without bearing)/3.2kg (with bearing).
* GM5-25: Nominal displacement 25.0ml/r; rated pressure 16MPa; rated speed 2800r/min; minimum speed 500r/min; theoretical torque
63.7N·m; weight 2.7kg (without bearing)/3.4kg (with bearing).

Key Performance Supplements
1. Pressure Limit: Peak pressure can reach 25MPa (intermittent operation), maximum continuous working pressure is 20MPa, and
continuous working pressure of the external oil drain port is ≤0.6MPa.
2. Speed Range: Supports continuous operation at 500-4000r/min; some models can achieve stable low-speed operation at 1r/min
(low-speed stability error ≤5%).
3. Efficiency Indicators: Mechanical efficiency ≥0.92 (start-up condition), volumetric efficiency ≥0.97, with overall efficiency
leading similar products.

III. Structural Features and Core Advantages
1. Three-Piece Compact Design: The front cover, intermediate body, and rear cover are integrally formed of aluminum alloy; gears
and pressure plates are made of alloy steel, with a weight of only 1.9-3.4kg, and the volume is 30% smaller than traditional
motors.
2. Pressure Compensation System: The rear cover has a built-in pressure plate, which can automatically adjust the axial clearance
to achieve radial + axial dual pressure compensation, reducing bearing load and extending service life by more than 30%.
3. Flexible Structural Configuration: Provides 4 structural types—single rotation direction (with/without front bearing),
bidirectional rotation (with/without front bearing). Models with front bearings can bear combined radial + axial loads.
4. Universal Connection Standards: Flanges, shaft extensions, and oil ports comply with SAE and GB national standards, supporting
multiple combinations such as diamond flanges, spline shaft extensions, and pipe thread/flange oil ports.
5. Highly Adaptable Materials: The front and rear covers are press-fitted with DU bearings (with a wear resistance coefficient
twice that of ordinary bearings), suitable for hydraulic oil media, with an operating temperature range of -20℃~60℃.

IV. Application Scenarios and Replacement Value
Main Application Fields
* Construction machinery: Drive of executive mechanisms in excavators, loaders, and cranes.
* Agricultural machinery: Power output of hydraulic systems in tractors and harvesters.
* Industrial equipment: Low-speed and high-torque drive of machine tools, conveyor lines, and hydraulic pump stations.
* Vehicle equipment: Auxiliary power units of special vehicles and hydraulic winches.