When equipment needs more speed than the lowest-RPM A8 models but still requires controlled high torque, the Cleco A8R337M A8 Series Reversible Axial Piston Air Motor delivers 2.7 HP with a 215 RPM free speed and 226 ft-lbs of stall torque. Axial piston construction uses pistons arranged along the motor axis to generate strong rotary force at lower speeds than direct-drive air motors, making this model a practical choice for powered fixtures, indexing equipment, conveyors, machine drives, mixers, and other air-powered rotary systems.The A8R337M combines reversible operation with rear exhaust, allowing the motor to drive in either direction while routing discharged air away from the driven component. Its 11.9:1 gear ratio balances torque multiplication with moderate output speed, while the keyed spindle configuration provides a positive mechanical connection for couplings, sprockets, pulleys, and custom drive assemblies used in production machinery or plant-built equipment.Type: Reversible Axial Piston Air Motor | Series: A8 Series | Model: A8R337M | Max Power: 2.7 HP / 2.01 kW | RPM at Max HP: 109 RPM | Free Speed: 215 RPM | Stall Torque: 226 ft-lbs | Gear Ratio: 11.9:1 | Spindle Type: Keyed Spindle | Control: Reversible | Exhaust: Rear Exhaust | Air Inlet: 1/2″ NPTF | Air Consumption: 112 SCFM | Rated Pressure: 90 PSI / 620 kPa | Length: 20.63″ | Max Overhung Load at Stall: 1000 lbsFeatures:Axial piston air motor construction provides strong low-speed torque for machine-drive and fixture-powered applications.Reversible operation allows the motor to drive clockwise or counterclockwise when bidirectional motion is required.Rear exhaust helps direct discharged air away from the work interface and driven mechanism.11.9:1 gear ratio reduces output speed while increasing torque compared with direct-drive configurations.Keyed spindle provides a positive drive connection for couplings, sprockets, pulleys, and custom machine components.215 RPM free speed offers a mid-speed option within the A8 Series for applications that need faster rotation than very low-speed high-torque models.Air motor design can tolerate stall conditions without the electrical burnout risk associated with many electric motors, provided the system is properly sized and applied.Made in USA: Applications:Production machinery and automation stations requiring reversible rotary motion at moderate speed.Powered fixtures, indexing devices, and positioning equipment where controlled pneumatic torque is preferred.Conveyor, winch, and machine-drive systems that require 215 RPM free speed with 226 ft-lbs of stall torque.Mixing and agitation equipment where pneumatic power helps move loaded shafts without relying on an electric motor.Plant maintenance and MRO replacement projects involving existing Cleco A8 Series air motor installations.FAQs:Q: What does stall torque mean on the Cleco A8R337M?A: Stall torque is the maximum turning force the motor can produce when the output shaft is stopped under load. For this model, the listed stall torque is 226 ft-lbs.Q: What is the difference between free speed and RPM at maximum horsepower?A: Free speed is the no-load output speed of the motor. RPM at maximum horsepower is the loaded operating point where the motor produces its rated power, which is 109 RPM for the A8R337M.Q: Can this motor run in both directions?A: Yes. The A8R337M is a reversible air motor, so it can be used in applications that require clockwise and counterclockwise rotation when the air circuit is configured correctly.Q: How much air supply does the A8R337M require?A: The listed air consumption is 112 SCFM with performance rated at 90 PSI. The compressor, regulator, hose, and fittings should be sized to maintain adequate flow at the motor during loaded operation.Q: Is this a direct replacement for an electric motor?A: It may be used as an electric motor alternative when the horsepower, output speed, stall torque, mounting, spindle connection, and available compressed air supply match the machine requirements. Final selection should be reviewed against the actual equipment design. .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)A8R336MFace Mounting1 3/8 in Keyed Spindle3875638.0 | 8655123.133.6-120.63 | 5242.7112ReversibleA8R338MFace Mounting1 3/8 in Keyed Spindle65125385.0 | 5225123.120.3-120.63 | 5242.7112ReversibleA8R337MFace Mounting1 3/8 in Keyed Spindle109215226.0 | 3065123.111.9-120.63 | 5242.7112ReversibleA8R311MFace Mounting1 1/8 in Keyed Spindle225450110.0 | 1493817.25.8-117.5 | 4452.7112ReversibleA8R310MFace Mounting1 1/8 in Keyed Spindle37576564.0 | 873817.23.4-117.5 | 4452.7112ReversibleA8R309MFace Mounting1 1/8 in Keyed Spindle1300260019.0 | 263817.21-117.5 | 4452.7112Reversible (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)
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