SAN-EI Air Motor
AGM Series – Gear Turbine Type Air Motor
The AGM Series air motor is a gear turbine type pneumatic motor manufactured by SAN-EI SEIKI SEISAKUSHO Co., Ltd. (Japan). This series is designed to deliver smooth rotation with low torque pulsation and stable constant-speed operation, making it suitable for heavy-duty industrial applications.
Compared with other types of air motors, the AGM series emphasizes stable speed control and high power output, which allows it to drive large industrial equipment.
1 Structure and Working Principle
The AGM series uses a gear turbine mechanism.
Mechanical principle
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A pair of gears is installed inside the motor housing.
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The gears are supported by bearings within the motor casing.
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Compressed air drives the gear turbine mechanism.
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The rotation is transmitted to the output shaft, which protrudes from the motor housing.
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Control valves on the air inlet side enable forward and reverse rotation.
The motor is also equipped with a built-in governor that maintains constant speed even when load or air pressure changes.
2 Main Features
Constant Speed Control
A governor is included as standard, allowing the motor to maintain stable rotational speed under varying load conditions.
Smooth Rotation
The gear turbine design reduces torque pulsation, resulting in smoother operation compared with other air motor types.
Low Noise Structure
The outer structure of the motor is designed to reduce operating noise.
Flexible Speed Control
Certain models can control rotational speed using pilot pressure control, providing additional flexibility in industrial systems.
Simple Sliding Structure
The rotating part mainly uses an oil seal as the sliding element, which reduces friction and maintenance requirements.
Flexible Output Shaft Position
Users can choose different shaft configurations:
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Upper mounted output shaft
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Lower mounted output shaft
3 Operating Conditions
Typical operating conditions include:
Air pressure:
0.5 MPa
Typical rotation speed:
1500 rpm
Optional speed configuration:
1800 rpm models available depending on application requirements.
The torque and output characteristics vary with rotational speed and load conditions.
4 AGM Series Models and Specifications
Specifications based on 0.5 MPa air pressure:
| Model | Output | Speed | Torque | Air Consumption |
|---|---|---|---|---|
| AGM10 | 7.5 kW | 1500 rpm | 48 Nm | 8.5 m³/min |
| AGM15 | 11.6 kW | 1500 rpm | 75 Nm | 13.5 m³/min |
| AGM23 | 18.8 kW | 1500 rpm | 119 Nm | 21.0 m³/min |
| AGM40 | 31.5 kW | 1500 rpm | 200 Nm | 35.0 m³/min |
These models cover a wide power range from medium to large industrial drives.
5 Typical Applications
AGM series air motors are widely used in industries requiring high power and stable rotation.
Steel and Metallurgical Industry
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Conveyor drives
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Rolling mill equipment
Marine and Offshore Equipment
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Ship winches
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Deck machinery
Power Generation
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Gas turbine starters
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Emergency drive systems
Industrial Machinery
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Belt conveyors
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Pump drives
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Emergency backup motors
Because air motors use compressed air instead of electricity, they are suitable for explosive or hazardous environments such as chemical plants or oil refineries.
6 Advantages of Gear Turbine Air Motors
Compared with other air motor types, the AGM series offers several advantages:
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Stable constant-speed operation
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Low torque pulsation
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High output power
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Smooth and quiet operation
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Reliable performance in heavy-duty industrial applications
These characteristics make the AGM series suitable for large industrial machinery requiring continuous and stable operation.