Associated Electronics S1903MG - Standard Metal Gear Servo

Specifications

Source: Most data comes from the manufacturer but some data is sourced from our loyal community.

Last Updated:	2025-08-03
Modulation:	Analog
Torque:	4.8V: 41.70 oz-in (3.00 kg-cm)
Speed:	4.8V: 0.19 sec/60°
Weight:	1.78 oz (50.5 g)
Dimensions:	Length:1.57 in (39.9 mm) Width:0.79 in (20.1 mm) Height:1.42 in (36.1 mm)
Motor Type:	(add)
Gear Type:	Metal
Rotation/Support:	Single Bearing
Rotational Range:	(add)
Pulse Cycle:	(add)
Pulse Width:	(add)
Connector Type:	(add)

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The discontinued Associated Electronics S1903MG takes the reliable and versatile platform of the standard S1903 servo and enhances it with the superior durability of a full metal gear train. The 'MG' designation signifies this critical upgrade, making the S1903MG a significantly more robust and resilient servo capable of handling the increased stress and shock loads of more demanding applications. This makes it an ideal and affordable upgrade for the steering systems of 1/10 scale monster trucks and buggies, where the stock plastic-geared servos are often a weak point. The metal gears provide a welcome dose of peace of mind, ensuring the servo can withstand the rigors of off-road bashing and less-than-perfect landings. It's also an excellent choice for the control surfaces of larger sport aircraft where higher air loads demand a more durable gear set.
While sharing the same reliable motor as its plastic-geared sibling, the S1903MG's metal gears provide a more direct and positive feel, with less flex and slop in the geartrain. This translates to a more precise and connected feel for the user, enhancing the overall driving or flying experience. Supported by a ball bearing on the output shaft, the S1903MG offers smoother operation and reduced wear compared to bushing-only servos. For the hobbyist looking for a cost-effective way to improve the durability and precision of their model, the Associated Electronics S1903MG is a logical and worthwhile upgrade.