Cleco MKW418M MK Series Radial Piston Air Motor | 11 HP | 1,900 RPM | 117 (ft-lbs) Stall Torque | Rear Exhaust

When a pneumatic drive needs high horsepower without the electrical concerns of an electric motor, the Cleco MKW418M delivers 11 HP from the MK Series radial piston platform. Its 1,900 RPM free speed supports faster shaft rotation than geared MK models, while 117 ft-lbs of stall torque provides the holding force needed when the driven load stops the motor. A radial piston air motor uses multiple pistons arranged around the crankcase to convert compressed air into rotary output, making it well suited for powered machinery, fixtures, and equipment where controlled pneumatic rotation is preferred.

The MKW418M is a direct-drive, non-valved air motor, meaning speed and direction control are handled by external pneumatic controls rather than built-in valving. Its 1" threaded spindle, foot mounting, and rear exhaust configuration help integrators mount the motor into machinery while routing spent air away from the drive end. Rated at 311 SCFM air consumption and 1-1/4" NPTF air inlet, this motor is intended for plant air systems sized for high-volume pneumatic power.

Type: Radial Piston Air Motor | Series: MK Series | Model: MKW418M | Configuration: Without Valving | Drive: Direct Drive | Max Power: 11 HP / 8.20 kW | RPM at Max HP: 975 RPM | Free Speed: 1,900 RPM | Stall Torque: 117 ft-lbs / 159 Nm | Starting Torque: 72 ft-lbs / 98 Nm | Spindle Type: 1" Threaded Spindle | Gear Ratio: 1:1 / Direct Drive | Air Consumption: 311 SCFM / 8.81 m³/min | Air Inlet: 1-1/4" NPTF | Max Overhung Load at Stall: 2,500 lbs / 1,134 kg | Mounting: Foot Mounting | Exhaust: Rear | Operating Pressure: 90 PSI / 620 kPa

Features:

• 11 HP MK Series radial piston motor provides high pneumatic power for machinery, fixtures, and equipment drives.
• 1,900 RPM free speed supports faster direct-drive operation where high torque multiplication is not required.
• 117 ft-lbs stall torque allows the motor to hold under load without the burnout risk associated with stalled electric motors.
• Direct-drive configuration eliminates gear reduction for simpler output speed transfer at the spindle.
• Without-valving design allows external air controls to be selected and installed around the application requirements.
• 1" threaded spindle provides a defined mechanical connection point for compatible couplings, adapters, or driven components.
• Foot mounting helps integrators secure the motor to machinery bases, frames, or custom mounting plates.
• Rear exhaust routing directs spent air away from the spindle end to help simplify installation layout.

Made in USA:

Applications:

• Industrial machinery integration — powering rotating equipment where pneumatic drive is preferred over electric drive.
• Mixers and agitators — driving shafts in process equipment when the air system can support the required 311 SCFM consumption.
• Conveyors and production fixtures — supplying direct-drive rotary motion for custom automation and material handling setups.
• Hoists, winches, and mechanical drives — supporting applications that benefit from pneumatic stall tolerance under load.
• Oil and gas, marine, and plant maintenance environments — replacing electric motors in applications where air-powered drive systems are already specified.

FAQs:

• Q: What does “without valving” mean on the MKW418M?
  A: It means the motor does not include built-in directional or throttle valving. Speed, start/stop, and direction control must be handled with properly selected external pneumatic controls.
• Q: What size air system is required for this motor?
  A: The MKW418M is rated at 311 SCFM air consumption at 90 PSI, so it requires a high-volume industrial compressed air system. Confirm available flow at the motor inlet, not just compressor nameplate capacity, before installation.
• Q: Is this a geared air motor?
  A: No. The MKW418M is a direct-drive MK Series radial piston motor with a 1:1 output arrangement. For lower speeds and higher stall torque, compare against geared MK Series models such as the MKW419M or MKW420M.
• Q: Can an air motor stall without damage?
  A: Air motors can generally tolerate stalling better than electric motors because compressed air flow stops producing rotation without overheating an electric winding. The driven system, coupling, and mounting still need to be sized for the motor’s stall torque and overhung load limits.
• Q: What does radial piston mean?
  A: A radial piston motor uses pistons arranged around the centerline of the motor to generate rotary force. This design is commonly used when an application requires high pneumatic power and strong torque output from a compact industrial drive.

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