Gast 1UP-NRV-4-GR11 Gear Motor

The compact 1UP-NRV (GM) series offers variable operating speeds and power output that can be adjusted to meet the precise needs of your application.

Gast 1UP-NRV-4-GR11 Gear Motor

series offers variable operating speeds and power output that can be adjusted to meet the precise needs of your application. Their 15:1 gear reducer is not only ideal for lower speed and higher torque applications, but they also can be stalled or overloaded for long periods without damaging the motor. In addition to being a non-electrical device and cool running, Gast air motors are ideal for use in hazardous and extreme ambient temperature locations.

Most of the Gast Air Motors and some of the Gast Gear Motors in this catalog meet the requirements of the EC directive 94/9EC (ATEX 100a). They may be used in zones 1 and 2 where explosive atmospheres of gas or dust are likely to occur. These are marked with II 2 G D c T4 in the catalogue and on the product. This indicates the air motor is Group II, Category 2, Gas and Dust Atmospheres, and a maximum surface temperature of 275 °F/135 °C. Check that the product driven by the air motor meets ATEX directive.


The output power of an air motor is relative to speed and to air line pressure.

Air Motors Up to 9 HP, speeds from 300 to 2,000 rpm, max. pressure 100 psi (7 bar)



  • Hub mounting
  • Any plane operation
  • Muffler AF350
  • II, 2 GD c T4


  • These air motors and gear motors are used in many industrial applications, from mixing equipment to running pump drives.
  • Self-sealing vanes take up their own wear, ensuring consistent output for thousands of hours of use.
  • Variable speed capabilities allow flexibility and versatility in any number of applications.
  • Cool-running operation means air motors can be used in ambient temperatures of up to 250° F (120° C).
  • Non-electrical operation reduces the possibility of explosion from igniting flammable gases.


  • Max Air Consumption: 21 cfm
  • ( 35.68 m3h )
  • Max Power: 0.31 hp
  • ( 0.23 kW )
  • Max Pressure: 5.6 bar
  • ( 81.22 psi )
  • Max Sound Level: 78 dB(A)
  • Max Speed: 400 rpm
  • Max Torque: 95 in-lb
  • ( 10.74 N m )
  • Mount: FACE
  • Output Shaft Type: Flat
  • Port Size and Type: 1/8″ NPT
  • Regulatory Approval: CE, ATEX
  • Rotation: Reversible
  • Shaft Size: 0.5 in
  • ( 12.7 mm )
  • Stainless Steel: NO
  • Starting Torque @ 80psi: 75 in-lb
  • ( 8.48 N m )
  • Torque Max Speed: 49 in-lb
  • ( 5.54 N m )
  • Vanes: 4
  • Weight: 3.1 lbs
  • ( 1.41 kg )


  • Filter AH100F
  • Regulator AH101R
  • Gauge AA807
  • Lubricator AH102L
  • Oil AD220 – 1 quart (.94 liters)
  • Repair kit K285 (Single Rotation)
  • Repair kit K286 (Reversible)
  • Repair kit K298 (8 Vane, Reversible)


  • Foot mounting (see page 38)




Gast 1UP-NRV-4-GR11 Gear Motor

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