Cleco MMW422M Radial Piston Air Motor | 15 HP | 150 RPM | 1952 (ft-lbs) Stall Torque | Rear Exhaust

When machinery needs slow, high-torque pneumatic rotation instead of high-speed electric drive power, the Cleco MMW422M MM Series radial piston air motor delivers 15 HP with a controlled 150 RPM free speed for equipment that must pull, turn, index, or lift under substantial load. Its radial piston design (pistons arranged around a crankshaft to create overlapping power strokes) supports smooth torque delivery, while the 1,952 ft-lbs stall torque rating gives machine builders a clear measure of the motor’s available torque when the output is brought to a stop under load.

The MMW422M is a reduction-geared MM Series motor supplied without valving, allowing the installer to select the external valve and control arrangement required by the machine. With 71 RPM at maximum horsepower, a 14.2:1 gear ratio, rear exhaust, and a 1-1/4" threaded spindle, this model is suited to fixed equipment layouts where low-speed torque matters more than shaft speed.

Type: Radial Piston Air Motor | Series: MM Series | Model: MMW422M | Maximum Power: 15 HP / 11.19 kW | Free Speed: 150 RPM | RPM at Max HP: 71 RPM | Stall Torque: 1,952 ft-lbs / 2,647 Nm | Starting Torque: 1,157 ft-lbs / 1,569 Nm | Air Consumption: 345 SCFM / 9.77 m³/min | Control: Without Valving | Exhaust: Rear Exhaust | Spindle Type: 1-1/4" Threaded Spindle | Gear Ratio: 14.2:1 | Air Inlet: 1-1/4" NPTF | Rated Air Pressure: 90 PSI / 620 kPa | Length: 20.88" | Weight: 231 lbs / 104.8 kg | Max Overhung Load at Stall: 2,800 lbs / 1,270 kg

Features:

• Radial piston motor construction provides strong pneumatic output for equipment that must start and operate under load.
• 15 HP maximum power supports larger machine-drive applications in production, process, and material handling systems.
• 150 RPM free speed is suited to lower-speed drive layouts where torque multiplication is more important than high shaft speed.
• 14.2:1 gear reduction increases output torque for winches, hoists, mixers, and other driven equipment requiring controlled rotation.
• Supplied without valving so the motor can be matched with the external valve package selected for the application.
• 1-1/4" threaded spindle provides a defined output connection point for compatible couplings, adapters, or driven components.
• Rear exhaust helps direct spent air away from the spindle side of the motor during operation.
• Rated at 90 PSI with 345 SCFM air consumption, giving installers defined air supply requirements for system planning.

Made in USA:

Applications:

• Winches and hoists — supplying low-speed pneumatic rotation for lifting, pulling, and positioning systems when properly matched to the machine design.
• Industrial mixers and agitators — turning loaded shafts, drums, and process equipment where high starting torque is required.
• Conveyors and indexing machinery — driving slow-speed movement in transfer equipment, rotary tables, and positioning systems.
• Plant maintenance and MRO — replacing or specifying pneumatic motor drives on existing equipment that uses high-flow compressed air.
• OEM machinery integration — building air-powered drive systems where external valving, speed control, and mounting layout are selected by the equipment designer.

FAQs:

• Q: What makes the MMW422M different from the 2,100 RPM MMW421M?
  A: The MMW422M uses a 14.2:1 gear reduction and runs at 150 RPM free speed, giving it much higher stall torque. The MMW421M is the faster direct-drive option, while the MMW422M is the better fit when low-speed torque is the priority.
• Q: What does “without valving” mean?
  A: It means the motor does not include an integral control valve. The installer must provide the proper external valve arrangement for the required operating direction, start/stop control, and speed control method.
• Q: How much air does this motor require?
  A: The MMW422M consumes 345 SCFM and is rated at 90 PSI. The compressed air system should be sized to maintain both flow and pressure during operation, especially in continuous or high-load service.
• Q: What does stall torque mean for this air motor?
  A: Stall torque is the torque available when the output is stopped under load. The MMW422M’s 1,952 ft-lbs stall torque rating helps determine whether the motor has enough overload capability for the driven machine.
• Q: Can this motor replace an electric gearmotor?
  A: It can be used as a pneumatic replacement in the right application, but the speed, torque, spindle connection, mounting layout, duty cycle, air consumption, and control method must be checked before substitution.

Looking for more information about Cleco Air Motor? Click here to view the Catalog

Need help selecting the correct Cleco Air Motors for your application? Please call (800) 608-5210 or email info@intlairtool.com