Cleco A6R331M Reversible Axial Piston Air Motor | 1.9 HP | 100 RPM | 370 (ft-lbs) Stall Torque | Rear Exhaust

When low-speed pneumatic power is needed for equipment that must start under load, the Cleco A6R331M Reversible Axial Piston Air Motor delivers 1.9 HP with a 100 RPM free speed and 370 ft-lbs stall torque. Axial piston construction uses air-driven pistons arranged along the motor axis to produce strong turning force at controlled speeds, making this motor well suited for machinery drives where torque matters more than high RPM. The 33.6:1 gear ratio helps convert air power into low-speed output for applications such as mixers, winches, valve actuation, conveyors, and other engineered equipment drives.

The A6R331M is part of Cleco’s A6 Series axial piston motor family and features reversible operation, allowing the output rotation to be driven in either direction when properly plumbed and controlled. A rear exhaust configuration helps route exhaust air away from the working end of the motor, while the face mounting layout and 1-1/8" diameter keyed spindle support integration into fixtures, brackets, and machine drive assemblies. Cleco rates this motor at 62 CFM air consumption and 90 PSI operating pressure, so air supply sizing should be verified before installation.

Type: Reversible Axial Piston Air Motor | Series: A6 Series | Model: A6R331M | Max Power: 1.9 HP / 1.42 kW | Free Speed: 100 RPM | RPM at Max HP: 54 RPM | Stall Torque: 370 ft-lbs / 502 Nm | Starting Torque: 269 ft-lbs / 365 Nm | Gear Ratio: 33.6:1 | Control: Reversible | Exhaust: Rear | Mounting: Face Mounting | Spindle: 1-1/8" Diameter Keyed Spindle | Air Inlet: 3/8" NPTF | Air Consumption: 62 CFM / 1.76 m³/min | Rated Pressure: 90 PSI / 620 kPa | Weight: 43 lbs / 19.5 kg | Max Overhung Load at Stall: 1000 lbs / 454 kg

Features:

• Axial piston motor design provides high torque output at low operating speed for machinery drive applications.
• Reversible control supports clockwise or counterclockwise operation when matched with the correct pneumatic control setup.
• Rear exhaust directs exhaust air away from the spindle end of the motor, helping simplify installation in enclosed or fixture-mounted layouts.
• 33.6:1 gear ratio reduces output speed while increasing usable torque for load-starting applications.
• 1-1/8" diameter keyed spindle provides a positive mechanical drive connection for compatible couplings, sprockets, pulleys, or machine interfaces.
• Face mounting configuration supports direct installation into brackets, frames, and equipment housings.
• Rated at 62 CFM air consumption at 90 PSI, giving engineers and maintenance teams a defined air supply target for system planning.
• Maximum overhung load rating of 1000 lbs at stall supports properly designed belt, chain, or side-load applications when load location matches manufacturer limits.

Made in USA:

Applications:

• Industrial machinery drives where low-speed, high-torque pneumatic power is required.
• Mixer and agitator systems that need strong starting torque under load.
• Valve actuation, indexing, and positioning equipment requiring reversible air motor operation.
• Conveyor, winch, and hoist-related drive systems where the motor must be sized to application torque, speed, and load requirements.
• Plant maintenance and MRO replacement projects where electric motor use is impractical or pneumatic power is preferred.
• OEM equipment builds that require a face-mounted air motor with a keyed spindle and rear exhaust layout.

FAQs:

• Q: What does axial piston mean on this Cleco air motor?
  A: Axial piston refers to a piston-driven air motor layout where the pistons act along the motor axis. In practical terms, this style is used when the application needs strong torque at lower speeds rather than high-RPM rotary vane output.
• Q: What air supply is required for the A6R331M?
  A: Cleco rates this motor at 62 CFM air consumption at 90 PSI. The compressor, regulator, hose, valves, and fittings should be sized to maintain that air flow and pressure under load.
• Q: What is stall torque?
  A: Stall torque is the torque produced when the motor is stopped under load. For this model, the stall torque is 370 ft-lbs, but the full application should also be checked against starting torque, operating speed, duty cycle, mounting, spindle connection, and overhung load.
• Q: Can this air motor replace an electric motor?
  A: It may be suitable for pneumatic replacement or OEM equipment designs when the required horsepower, speed, torque, mounting pattern, spindle style, and air supply match the application. A motor-sizing review is recommended before substituting it for an electric motor.
• Q: Are exhaust mufflers or pendant controls included?
  A: Cleco lists exhaust muffler Part 813485 and pendant control kits as optional equipment. Do not assume these items are included unless they are specified on the quote or order confirmation.

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