Cleco MR70R123M Reversible Rotary Vane Air Motor | 7.5 HP | 465 RPM | 340 (ft-lbs) Stall Torque | Side Exhaust

When production equipment needs a reversible pneumatic drive with more speed than the lower-RPM MR70 models, the Cleco MR70R123M reversible rotary vane air motor delivers 7.5 HP with a 465 RPM free speed and 340 ft-lbs of stall torque. Stall torque is the maximum turning force available before the motor stops rotating, making this model useful for driven loads that may see resistance during start-up, reversal, or process changes. Its rotary vane design uses compressed air to turn internal vanes inside the motor housing, giving machine builders a compact air-powered alternative to electric drive systems.

The MR70R123M is a flange mounting model in Cleco’s MR70 Series, with side exhaust, reversible operation, and a 1-1/4" geared keyed spindle for positive connection to compatible couplings, fixtures, or driven equipment. With a 21.8:1 gear ratio, this model balances output speed and torque for applications such as turntables, mixers, valve actuation, machinery drives, and plant equipment where controlled rotation in both directions is required.

Type: Reversible Rotary Vane Air Motor | Series: MR70 Series | Model: MR70R123M | Maximum Power: 7.5 HP / 5.59 kW | RPM at Max. HP: 257 RPM | Free Speed: 465 RPM | Stall Torque: 340 ft-lbs / 461 Nm | Starting Torque: 227 ft-lbs / 308 Nm | Gear Ratio: 21.8:1 | Mounting: Flange Mounting | Spindle: 1-1/4" Geared Diameter Keyed Spindle | Exhaust: Side Exhaust | Air Inlet: 1" NPTF | Air Consumption: 212 CFM / 6.00 m³/min | Weight: 65.0 lbs / 29.0 kg | Max. Overhung Load at Stall: 2560 lbs / 1161 kg | Performance Rating: 90 PSI / 620 kPa

Features:

• Rotary vane air motor design supplies compressed-air rotary power for machinery, process equipment, and fixture drives.
• Reversible control allows clockwise and counter-clockwise operation for bidirectional drive requirements.
• 7.5 HP maximum power rating supports larger pneumatic drive applications where compact output and high air flow are available.
• 465 RPM free speed gives this model faster unloaded rotation than the 310 RPM MR70 geared versions while maintaining 340 ft-lbs stall torque.
• 21.8:1 gear ratio reduces motor speed and increases output torque for controlled mechanical drive applications.
• Flange mounting configuration supports direct installation to compatible machine faces, brackets, or mounting plates.
• 1-1/4" geared keyed spindle provides a positive drive interface for compatible couplings and driven components.
• Side exhaust helps direct exhaust air away from the spindle connection and mounting surface.

Made in USA:

Applications:

• Machine building — driving custom equipment, indexing fixtures, and air-powered mechanisms that need reversible rotation.
• Mixing and agitation — powering compatible mixers for paints, coatings, process fluids, or similar materials within the motor’s torque and speed range.
• Plant maintenance and MRO — replacing or supplementing electric drive systems where pneumatic power, stall behavior, or air-driven control is preferred.
• Material handling equipment — rotating turntables, positioning devices, or fixture drives that require flange-mounted motor installation.
• Valve actuation and mechanical systems — supplying bidirectional rotary motion for valves, mechanical hands, universal joints, and related drive assemblies.
• Foundry and industrial production — supporting air-driven shop equipment where compressed air infrastructure is already available.

FAQs:

• Q: What is the difference between free speed and RPM at maximum horsepower?
  A: Free speed is the motor speed with no load applied, which is 465 RPM for the MR70R123M. RPM at maximum horsepower is the loaded operating point where the motor develops its rated power output, listed as 257 RPM for this model.
• Q: How much air supply does the MR70R123M require?
  A: Cleco lists this MR70 Series motor at 212 CFM / 6.00 m³/min with performance rated at 90 PSI / 620 kPa. The compressor, piping, hose, filter, regulator, and lubricator should be sized to maintain that flow and pressure at the motor location.
• Q: Is this a foot-mounted or flange-mounted air motor?
  A: The MR70R123M is the flange mounting version. For the same 465 RPM and 340 ft-lbs stall torque rating in a foot-mounted configuration, compare against the MR70R121M.
• Q: What does the keyed spindle do?
  A: A keyed spindle uses a keyway to transmit torque through a matching coupling or hub. This helps prevent slip between the motor shaft and the driven component when the motor is under load.
• Q: Does this Cleco rotary vane motor need lubrication?
  A: Yes. Cleco rotary vane air motors require air line lubrication, and the lubricator should be mounted as close to the motor as practical to support proper vane and motor service life.

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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