When a pneumatic drive needs low-speed reversible rotation with substantially higher output torque, the Cleco B4R322M Reversible Axial Piston Air Motor delivers 0.9 HP, 150 RPM free speed, and 136 ft-lbs stall torque. The axial piston design converts compressed air into rotary motion with strong starting capability, while the higher gear reduction lowers speed and increases torque for applications where controlled rotation matters more than fast output.Part of the B4 Series, the B4R322M is suited for machine builders, maintenance teams, and process-equipment integrators who need a reversible pneumatic motor for driven fixtures, valve actuation, indexing units, winding systems, and other compact mechanical drive packages. Its 7/8″ keyed spindle supports positive torque transfer to compatible couplings, sprockets, pulleys, or custom drive components, while the rear exhaust layout helps route discharge air away from the mounting face.Type: Reversible Axial Piston Air Motor | Series: B4 Series | Model: B4R322M | Max Power: 0.9 HP / 0.67 kW | Free Speed: 150 RPM | Stall Torque: 136 ft-lbs / 184 Nm | 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 | Maximum Overhung Load @ Stall: 800 lbs / 363 kg | Rated Air Pressure: 90 PSI / 620 kPaFeatures:Axial piston air motor configuration provides strong starting torque for mechanical loads that need reliable rotation from a stopped position.Reversible operation supports forward and reverse motion for positioning, indexing, winding, and actuation tasks.150 RPM free speed gives this model a low-speed output profile for applications that need controlled movement rather than rapid rotation.136 ft-lbs stall torque provides significantly higher turning force than faster B4 Series models, helping the motor handle greater resistance at startup or during load changes.0.9 HP / 0.67 kW power rating supports compact pneumatic drive packages where compressed air is preferred over electrical power.7/8″ keyed spindle helps transmit torque securely to matching mechanical drive hardware in custom machine builds.Rear exhaust directs discharge air away from the front mounting area, which can help simplify installation inside fixtures, housings, or equipment frames.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:Machine fixtures and automation driving rotary tables, indexing mechanisms, clamping systems, and production equipment that requires reversible motion.Valve actuation and mechanical positioning turning shafts, linkages, and rotary devices where low speed and higher torque are required.Material handling and conveyor equipment powering intermittent movement, reversing stations, and controlled transfer points.Mixers and process machinery supplying pneumatic rotary power in wet, dirty, or repetitive-duty environments where stall tolerance is useful.Winches, hoists, and winding systems supporting compact drive assemblies where controlled speed and increased torque are more important than high RPM.FAQs:Q: How is the Cleco B4R322M different from faster B4 Series air motors?A: The B4R322M trades speed for torque. It runs at 150 RPM free speed and provides 136 ft-lbs stall torque, making it better suited to slower machine-drive applications than higher-speed B4 models.Q: What does stall torque mean on this air motor?A: Stall torque is the torque produced when the motor is loaded until rotation stops. The 136 ft-lbs rating helps determine whether the motor has enough turning force to start, hold, or overcome the intended load.Q: Can the B4R322M be used in place of an electric motor?A: It may be suitable when the required horsepower, speed, torque, spindle style, mounting layout, and air supply match the machine. Air motors are often selected for frequent reversing, stall tolerance, variable-speed operation, or environments where pneumatic power is preferred.Q: What air system is needed for this model?A: The B4R322M is rated at 90 PSI and has a listed air consumption of 39.9 SCFM. The compressor, regulator, air line, and fittings should be sized to maintain pressure and flow during loaded operation.Q: Why use a keyed spindle on a low-speed air motor?A: A keyed spindle helps transfer torque to a compatible coupling, sprocket, pulley, or custom drive part without relying only on friction. That is especially useful on lower-speed, higher-torque motors where startup loads and reversing loads can be significant. .spec-accordion{width:100%;max-width:1200px;margin:1em auto;font-family:”Montserrat”,Arial,sans-serif;box-sizing:border-box} .spec-accordion *{box-sizing:border-box} .spec-accordion-toggle{width:100%;display:flex;justify-content:center;align-items:center;position:relative;background:#444;color:#fff;border:0;padding:14px 48px;font-family:”Bai Jamjuree”,Arial,sans-serif;font-size:16px;font-weight:700;text-transform:uppercase;cursor:pointer;text-align:center} .spec-accordion-toggle::after{content:”+”;font-size:22px;position:absolute;right:18px} .spec-accordion.open .spec-accordion-toggle::after{content:””} .spec-accordion-panel{display:none!important;width:100%;padding:16px 0 0} .spec-accordion.open .spec-accordion-panel{display:block!important} .spec-accordion-panel[hidden],.spec-accordion:not(.open) .spec-accordion-panel{display:none!important} .spec-table-wrapper{width:100%;max-width:1200px;margin:0 auto;overflow-x:visible!important;overflow-y:visible} .spec-table{width:100%!important;max-width:1200px;min-width:0!important;margin:0 auto;border-collapse:collapse;table-layout:fixed;font-family:”Montserrat”,Arial,sans-serif;font-size:12px;color:#000} .spec-table th{background:#444;color:#fff;text-transform:uppercase;font-family:”Bai Jamjuree”,Arial,sans-serif;font-weight:700;font-size:11px;padding:8px 6px;border:1px solid #ddd;text-align:center;line-height:1.15;white-space:normal;overflow-wrap:anywhere;word-break:normal} .spec-table td{padding:6px;border:1px solid #eee;text-align:center;line-height:1.15;white-space:normal;overflow-wrap:anywhere;word-break:normal} .spec-table .long-text{white-space:normal} .spec-table tbody tr:nth-child(even){background:#f7f7f7} .spec-table tbody tr:hover{background:#e5e5e5} .spec-table a{color:#0066cc;text-decoration:none;font-weight:600;background:transparent;padding:0;border-radius:0;box-shadow:none} .spec-table a:hover{text-decoration:underline} .group-row td{background:#444;color:#fff;font-family:”Bai Jamjuree”,Arial,sans-serif;font-weight:700;text-transform:uppercase;text-align:left} @media(max-width:640px){.spec-accordion,.spec-table-wrapper,.spec-table{width:100%;max-width:100%}.spec-accordion-toggle{font-size:14px;padding:13px 48px}} .spec-accordion.is-mobile-table .spec-table-wrapper{overflow-x:visible!important;overflow-y:visible} .spec-accordion.is-mobile-table .spec-table{width:100%;max-width:100%;min-width:0!important;border:0} .spec-accordion.is-mobile-table .spec-table thead{display:none!important} .spec-accordion.is-mobile-table .spec-table,.spec-accordion.is-mobile-table .spec-table tbody,.spec-accordion.is-mobile-table .spec-table tr,.spec-accordion.is-mobile-table .spec-table td{display:block;width:100%} .spec-accordion.is-mobile-table .spec-table tr{margin-bottom:14px;border:1px solid #ddd;background:#fff} .spec-accordion.is-mobile-table .spec-table tbody tr:nth-child(even),.spec-accordion.is-mobile-table .spec-table tbody tr:hover{background:#fff} .spec-accordion.is-mobile-table .spec-table th,.spec-accordion.is-mobile-table .spec-table td{white-space:normal!important} .spec-accordion.is-mobile-table .spec-table td{display:flex;justify-content:space-between;gap:14px;text-align:right;border:0;border-bottom:1px solid #eee;padding:10px 12px;font-size:13px;word-break:break-word} .spec-accordion.is-mobile-table .spec-table td::before{content:attr(data-label);font-weight:700;text-transform:uppercase;color:#444;text-align:left;flex:0 0 46%} .spec-accordion.is-mobile-table .spec-table td>a{word-break:break-word;background:transparent} .spec-accordion.is-mobile-table .group-row td{text-align:center;background:#444;color:#fff} .spec-accordion.is-mobile-table .group-row td::before{content:none} Available Variations and SpecificationsSKUMountSpindle TypeRPM at Max HPFree SpeedTorque StallWeightGear RatioLengthHorsepowerAir ConsumptionControl(RPM)(RPM)Ft-Lb | NmLbkgin | mmHp | kW(SCFM)B4R317MFace Mounting7/8 in Keyed Spindle4690232.0 | 31522.510.246.4-115.21 | 3860.939.9ReversibleB4R322MFace Mounting7/8 in Keyed Spindle79150136.0 | 18422.510.227.2-115.21 | 3860.939.9ReversibleB4R323MFace MountingDiscontinued90175119.0 | 16122.510.223.8-115.21 | 3860.939.9ReversibleB4R320MFace Mounting7/8 in Keyed Spindle15430070.0 | 9522.510.213.9-115.21 | 3860.939.9ReversibleB4R318MFace Mounting7/8 in Keyed Spindle27052540.0 | 5414.56.68-113.19 | 3350.939.9ReversibleB4R319MFace Mounting7/8 in Keyed Spindle525102021.0 | 2814.56.64.1-113.19 | 3350.939.9ReversibleB4R321MFace MountingDiscontinued215042005.0 | 6.814.56.61-113.19 | 3350.939.9Reversible (function(){ function initSpecAccordions(){ document.querySelectorAll(“.spec-accordion”).forEach(function(a){ if(a.dataset.specAccordionInit===”true”)return;a.dataset.specAccordionInit=”true”; var b=a.querySelector(“.spec-accordion-toggle”),p=a.querySelector(“.spec-accordion-panel”);if(!b||!p)return; var u=false; function m(){return(a.getBoundingClientRect().width||window.innerWidth)
-98%
