JR Americas

NX8931 Pro Ultra Torque MG WV Smart Servo

Part Number: JRPSNX8931





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  • Overview
  • Specifications
  • Parts List
  • Questions


JR - JRPSNX8931 - NX8931 Pro Ultra Torque MG WV Smart Servo

Ask any competition IMAC flyer or serious giant scale 3D enthusiast what their servo of choice is, and you'll undoubtedly hear the DS8911 mentioned more often than not. This isn't by accident- the DS8911 provides the perfect blend of brute strength and precision at a price point that won't break the bank.

Based on the previous DS8911 and NX8921, the new NX8931 features updated firmware, optimized for performance and efficiency, and a new modified and reinforced top case for increased durability.

Featuring automatic output detection, these new JR Smart Servos can be used with either conventional (PWM) or XBus installations for ease and flexibility. Programming is simple via your XBus-equipped JR XG-series DMSS transmitter, and not only can servo direction and travel be adjusted, but it is now possible to fine tune holding power, stopping speed, dead band, starting power, total servo travel, create an alarm if servo load exceeds a user-set limit, enable slow start, as well as enhanced failsafe features to help protect your servos in the event of signal loss.

Not using XBus- fear not. The NX8931 also features JR's unique automatic output detection, so it can be used in standard configuration with either conventional (PWM) or XBus installations for ease and flexibility with virtually any brand of equipment.

If you're looking to take the performance of your model to unprecedented heights, take a look at the new NX8931 servos from JR and feel the difference the new JR NX Smart Servos can provide.


Current NX8921 Owners can send their existing NX8921 servos to JR Americas for an upgrade to NX8931 specifications. Firmware will be updated to the more optimized and efficient NX8931 specs, and case tops will also be replaced with updated NX8931 case tops and labels. Cost is $10.00 per servo. Please download and complete the JR Americas service form at: http://www.jramericas.com/pdf/jr_americas_repair_service_form.pdf or contact us at service@jramericas.com for more information.


JR - JRPSNX8931 - NX8931 Pro Ultra Torque MG WV Smart Servo

  • JRPSNX8931 Pro Ultra Torque MG WV
  • Torque: 319.2 (4.8V)/411.0 (6.0V)/506.8 (7.4V)
  • Speed: 0.20 (4.8V)/0.16 (6.0V)/0.13 (7.4V)
  • Dimensions (L/W/H): 1.59x0.83x1.38 in
  • Weight: 2.54 oz
  • Input Voltage: 4.8-8.5v
  • Shaft Support: Dual Ball Bearing
  • Comparable to DS8911HV


JR - JRPSNX8931 - NX8931 Pro Ultra Torque MG WV Smart Servo

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