Cleco B4R320M Reversible Axial Piston Air Motor | 0.9 HP | 300 RPM | 70 (ft-lbs) Stall Torque | Rear Exhaust

When a machine-driven application needs slower reversible output with higher turning force, the Cleco B4R320M Reversible Axial Piston Air Motor delivers 0.9 HP, 300 RPM free speed, and 70 ft-lbs stall torque. The axial piston design converts compressed air into rotary motion with strong starting capability, while the 13.9:1 gear reduction lowers output speed and increases usable torque for equipment that must start under load, reverse direction, or tolerate frequent stop-start cycling.

Part of the B4 Series, this model uses a 7/8" keyed spindle for positive power transfer to compatible couplings, sprockets, pulleys, or custom drive components. The rear exhaust configuration helps route exhaust air away from the mounting face, making the B4R320M useful for production machinery, indexing equipment, valve actuation, winches, mixers, and other pneumatic drive systems where electric power may be less practical.

Type: Reversible Axial Piston Air Motor | Series: B4 Series | Model: B4R320M | Max Power: 0.9 HP / 0.67 kW | RPM @ Max HP: 154 RPM | Free Speed: 300 RPM | Stall Torque: 70 ft-lbs / 95 Nm | Gear Ratio: 13.9:1 | Spindle Type: 7/8" Keyed Spindle | Control: Reversible | Exhaust: Rear Exhaust | Air Consumption: 39.9 SCFM | Air Inlet: 3/8" NPTF | Weight: 14.5 lbs / 6.57 kg | Length: 15.21" | Maximum Overhung Load @ Stall: 800 lbs / 363 kg | Rated Air Pressure: 90 PSI / 620 kPa

Features:

• Axial piston air motor configuration provides strong starting torque for machine loads that must begin rotating under resistance.
• Reversible operation supports forward and reverse motion for indexing, winding, positioning, and mechanical actuation tasks.
• 300 RPM free speed gives this model a slower output than higher-speed B4 Series motors, helping match applications that need controlled rotation rather than fast rundown.
• 70 ft-lbs stall torque provides higher holding and starting force than faster B4 Series models with lower gear reduction.
• 13.9:1 gear ratio increases torque output while maintaining a practical mid-low speed range for driven equipment.
• 7/8" keyed spindle helps transmit torque securely to matching drive hardware in custom machine builds.
• Rear exhaust directs discharge air away from the front mounting area, which can simplify installation inside equipment housings or fixture assemblies.
• Performance is rated at 90 PSI and should be supported by clean, dry compressed air for consistent speed, torque, and service reliability.

Made in USA:

Applications:

• Production machinery and automation — driving rotary fixtures, indexing tables, feed units, and other machine-integrated motion systems.
• Valve actuation and mechanical positioning — turning linkages, shafts, and rotary devices that require controlled bidirectional movement.
• Material handling and conveyors — powering intermittent transfer points, reversing mechanisms, and lower-speed drive stations.
• Mixers and process equipment — supplying pneumatic rotary power where stall tolerance, wet environments, or frequent cycling are concerns.
• Winches, hoists, and winding systems — supporting compact pneumatic drive packages where torque is more important than high free speed.

FAQs:

• Q: How is the B4R320M different from the B4R319M?
  A: The B4R320M is the slower, higher-torque option. It has 300 RPM free speed and 70 ft-lbs stall torque, while the B4R319M runs faster at 1,020 RPM with 21 ft-lbs stall torque.
• Q: What does stall torque mean for this air motor?
  A: Stall torque is the torque produced when the motor is loaded until rotation stops. The 70 ft-lbs stall torque rating helps determine whether the motor has enough turning force to start or hold the intended load.
• Q: Can this Cleco air motor be used as an electric motor replacement?
  A: It can be considered when the required horsepower, speed, torque, spindle, mounting, and air supply match the machine. Air motors are often used where variable speed, frequent reversing, stall tolerance, or wet operating conditions make pneumatic power useful.
• Q: What air supply does the B4R320M require?
  A: The motor is rated at 90 PSI and has an air consumption value of 39.9 SCFM. The compressor and air line should be sized to maintain both pressure and flow during loaded operation.
• Q: Why does this model use a keyed spindle?
  A: A keyed spindle uses a keyway to transfer torque to a compatible coupling, pulley, sprocket, or custom drive component. This helps prevent slipping when torque load changes during startup, reversing, or intermittent operation.

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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