Cleco MR70R121M Reversible Rotary Vane Air Motor | 7.5 HP | 465 RPM | 340 (ft-lbs) Stall Torque | Side Exhaust

Built for high-torque pneumatic drive systems, the Cleco MR70R121M MR70 Series Reversible Rotary Vane Air Motor delivers 7.5 HP at a controlled 465 RPM, giving machinery builders and maintenance teams a compact air-powered alternative for mixers, conveyors, winches, positioning equipment, and other rotary-drive applications. Its rotary vane motor design (air-driven vanes that convert compressed air into smooth shaft rotation) provides variable-speed operation through air control, while the 340 ft-lbs stall torque rating shows how much turning force the motor can resist before stopping under load.

The 21.8:1 gear ratio reduces output speed while multiplying torque, making this model a strong fit for slower, higher-load drive points where direct-drive air motors would spin too fast. Reversible control allows clockwise or counterclockwise operation from the same motor, and the side exhaust routes spent air away from the mounting face and output shaft area for cleaner machine integration.

Type: Reversible Rotary Vane Air Motor | Series: MR70 Series | Motor Configuration: Rotary Vane | Power: 7.5 HP / 5.59 kW | Free Speed: 465 RPM | RPM at Max HP: 257 | Stall Torque: 340 ft-lbs | Starting Torque: 227 ft-lbs | Gear Ratio: 21.8:1 | Air Consumption: 212 SCFM | Air Inlet: 1" | Control: Reversible | Exhaust: Side | Mount: Foot Mounting | Spindle Type: Keyed Spindle | Spindle Size: 1-1/4" | Length: 16.63" | Max Overhung Load at Stall: 2,560 lbs

Features:

• Reversible operation supports clockwise and counter-clockwise shaft rotation for machinery that must drive, back out, index, or reposition loads.
• Rotary vane air motor configuration provides smooth pneumatic power with speed controlled through air flow and pressure regulation.
• 7.5 HP output supports high-load rotary drive applications where compact pneumatic power is preferred over an electric motor.
• 21.8:1 gear reduction lowers output speed while increasing available torque for slower machinery drive points.
• 340 ft-lbs stall torque provides strong resistance to load spikes in mixing, conveying, lifting-assist, and mechanical drive systems.
• Foot mounting simplifies installation on machine frames, brackets, and fixed equipment bases.
• 1-1/4" keyed spindle provides positive torque transfer to compatible couplings, sprockets, pulleys, or customer-supplied drive components.
• Side exhaust directs discharged air away from the output area to support cleaner routing in enclosed or equipment-mounted installations.

Made in USA:

Applications:

• Machine building and automation: powering indexed fixtures, rotary tables, feed mechanisms, and pneumatic drive assemblies where reversible rotation is required.
• Industrial mixing and agitation: driving compatible mixers where high stall torque and controlled low-speed operation are more important than high RPM.
• Conveyors and material handling: supplying rotary motion for equipment that benefits from air motor stall tolerance and simple speed control.
• Marine, mining, and oilfield maintenance: replacing electric drive components in pneumatic systems where compressed air is already available.
• Fabrication and production equipment: integrating into custom machines, hoists, winches, and fixtures that require a foot-mounted geared air motor.

FAQs:

• Q: What does stall torque mean on the Cleco MR70R121M?
  A: Stall torque is the torque produced at the point where the motor stops rotating under load. For this model, the listed stall torque is 340 ft-lbs, which helps buyers judge whether the motor has enough turning force for the intended drive system.
• Q: How much air supply does this motor require?
  A: The MR70R121M is listed at 212 SCFM air consumption, so it requires a large compressed air system sized for continuous industrial use. Confirm compressor capacity, line size, pressure regulation, and air treatment before installation.
• Q: What is the advantage of a reversible rotary vane air motor?
  A: Reversible control allows the output shaft to rotate in either direction, which is useful for machinery that must advance and retract, wind and unwind, or correct position without changing the drive layout.
• Q: What does the 21.8:1 gear ratio do?
  A: The gear reduction lowers the motor’s output speed and increases usable torque at the spindle. That makes this model better suited to lower-speed, higher-load machinery than a direct-drive air motor of the same horsepower.
• Q: Is this motor supplied with couplings or mounting hardware?
  A: The available product data identifies the motor, foot mount, and keyed spindle configuration, but it does not confirm included couplings, guards, or mounting hardware. Match all connection components to the 1-1/4" keyed spindle and the machine’s load requirements.

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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