Cleco B4R317M Reversible Axial Piston Air Motor | 0.9 HP | 90 RPM | 232 (ft-lbs) Stall Torque | Rear Exhaust

For low-speed pneumatic drive applications where compact power and controlled rotation matter, the Cleco B4R317M Reversible Axial Piston Air Motor supplies 0.9 HP output at a slow 90 RPM free speed. This combination is useful for machine builders, tooling engineers, and maintenance teams that need rotary motion without the speed of a standard vane motor. Its 232 ft-lbs stall torque provides the turning force needed to start and hold under resistance, while the axial piston design supports higher torque at lower speeds than many direct-drive air motor configurations.

The B4R317M is part of Cleco’s B4 Series axial piston air motor family and includes reversible control, allowing forward and reverse operation when connected to the proper pneumatic valve arrangement. The rear exhaust directs discharge air away from the front drive area, and the 7/8" keyed spindle provides a positive mechanical interface for compatible couplings, sprockets, pulleys, or custom machine components. With a 46.4:1 gear ratio, this model is built for torque multiplication and slower output speed in equipment where precision movement, stall tolerance, and air-powered reliability are more important than high RPM.

Type: Reversible Axial Piston Air Motor | Series: B4 Series | Model: B4R317M | Power: 0.9 HP | Power: 0.67 kW | Free Speed: 90 RPM | RPM at Max HP: 46 RPM | Stall Torque: 232 ft-lbs | Torque Range: 4–232 ft-lbs | Gear Ratio: 46.4:1 | Air Consumption: 39.9 SCFM | Air Inlet: 3/8" NPTF | Spindle Type: Keyed | Spindle Size: 7/8" | Control: Reversible | Exhaust: Rear | Mount: Face Mounting | Length: 15.21"

Features:

• Axial piston air motor configuration provides strong torque output at lower speeds for powered machinery and drive-system integration.
• Reversible control supports forward and reverse rotation when paired with the correct pneumatic control circuit.
• Rear exhaust helps route spent air away from the driven component and front mounting area.
• 7/8" keyed spindle creates a positive drive connection for compatible couplings, sprockets, pulleys, or custom machine interfaces.
• 46.4:1 gear reduction lowers output speed while increasing torque for slow-speed, higher-load operation.
• Face mounting configuration supports integration into fixtures, machinery frames, and custom equipment assemblies.
• Air-powered operation offers variable speed control and stall tolerance when properly applied, lubricated, and supplied with clean compressed air.

Made in USA:

Applications:

• Machine building and automation — adding reversible pneumatic rotary motion to custom fixtures, indexing devices, and production equipment.
• Industrial maintenance and MRO — replacing or supporting existing air motor drives where the torque, speed, spindle, and mounting match the machine.
• Conveyor and handling systems — powering slow-speed movement in compatible transfer, positioning, or material handling equipment.
• Mixing and agitation equipment — driving low-speed process components when the load requirement matches the motor’s torque and speed rating.
• Tooling and test fixtures — supplying controlled forward and reverse motion for clamps, rotating nests, and specialty pneumatic mechanisms.

FAQs:

• Q: What does the 232 ft-lbs stall torque rating mean?
  A: Stall torque is the maximum torque the motor can develop when the output shaft stops under load. For this model, 232 ft-lbs indicates strong low-speed turning force for applications where the motor may need to start, hold, or push through resistance.
• Q: Is the Cleco B4R317M reversible?
  A: Yes. The B4R317M is a reversible air motor, so it can run in forward or reverse when installed with the proper directional air valve and control setup.
• Q: What compressor capacity should be considered for this motor?
  A: The listed air consumption is 39.9 SCFM. The compressed air system should be sized to maintain adequate flow and pressure during the actual duty cycle, especially if the motor will run continuously or share air supply with other tools.
• Q: What is the difference between free speed and RPM at maximum horsepower?
  A: Free speed is the unloaded speed of the motor, listed as 90 RPM. RPM at maximum horsepower is the loaded operating point where the motor produces its rated power, listed as 46 RPM.
• Q: Can this air motor replace an electric motor?
  A: It may be used as an air-powered alternative when the torque, speed, mounting, spindle, airflow, and control requirements match the equipment. A qualified technician should confirm load conditions, guarding, valve selection, and lubrication before installation.

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