Batan B1121 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: 22.20 oz-in (1.60 kg-cm)
Speed:	4.8V: 0.13 sec/60°
Weight:	0.49 oz (14.0 g)
Dimensions:	Length:1.03 in (26.2 mm) Width:0.46 in (11.7 mm) Height:1.00 in (25.4 mm)
Motor Type:	(add)
Gear Type:	Plastic
Rotation/Support:	Single Bearing
Rotational Range:	(add)
Pulse Cycle:	(add)
Pulse Width:	(add)
Connector Type:	(add)

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The discontinued Batan B1121 is a compact and reliable analog servo that offers a great balance of performance and value, making it a popular choice for a variety of lightweight applications. Its small footprint and low weight make it particularly well-suited for park flyers, small electric aircraft, and other models where keeping weight to a minimum is crucial for performance. The B1121's smooth and consistent operation, supported by a single ball bearing, ensures dependable performance for flight control surfaces and other light-duty tasks.
While its plastic gears are not intended for high-stress applications, they provide quiet and efficient operation, which is ideal for smaller models. The B1121's specifications make it a direct competitor to many other popular micro servos on the market, but its affordability gives it a distinct advantage. It's a great 'go-to' servo for scratch-built projects and for repairing or upgrading the stock servos in many ready-to-fly (RTF) models.
For robotics enthusiasts, the B1121 is an excellent choice for small animatronics, sensor tilting mechanisms, and other light-duty tasks where a small and lightweight actuator is needed. Its low power consumption is also a plus for battery-powered projects. Overall, the Batan B1121 is a workhorse of a micro servo, offering a dependable and cost-effective solution for a wide range of modeling and robotics projects.