GWS S125 1T - 1 Turn Sail Winch Servo

Specifications

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

Last Updated:	2025-08-07
Modulation:	Analog
Torque:	4.8V: 92.00 oz-in (6.62 kg-cm) 6.0V: 106.00 oz-in (7.63 kg-cm)
Speed:	4.8V: 0.26 sec/60°
Weight:	1.76 oz (49.9 g)
Dimensions:	Length:1.59 in (40.4 mm) Width:0.79 in (20.1 mm) Height:1.65 in (41.9 mm)
Motor Type:	(add)
Gear Type:	Plastic
Rotation/Support:	(add)
Rotational Range:	(add)
Pulse Cycle:	(add)
Pulse Width:	(add)
Connector Type:	(add)

*We may earn a commission from your purchase.

The discontinued GWS S125 1T is a powerful sail winch servo, designed for the main sail control systems on a wide range of RC sailboats. The ""1T"" in its name signifies its travel of one full turn (360 degrees), which provides a good amount of line travel for the main and jib sheets on boats typically up to one meter in length. The S125 1T is a workhorse of the RC sailing community, known for its strong pulling power and reliability. It has the muscle to sheet the sails in tightly in a strong breeze, and the smooth proportional control needed for fine trim adjustments that are critical for performance.
The core identity of the S125 1T is its role as the standard, go-to sail winch for the majority of sport and club-level racing sailboats. It offers an excellent combination of power, travel, and value, making it a very popular choice for builders and skippers. It is known for its robust construction, capable of withstanding the wet environment and the constant high loads of sailing. It is the dependable engine that powers countless RC yachts.
In robotics and custom automation, the GWS S125 1T is a fantastic tool for achieving high-torque, 360-degree rotational control. It is an excellent choice for building a powerful, continuously rotating sensor platform, a rotating base for a robotic arm, or any application that requires a full circle of strong, proportional movement. It is a unique and highly capable actuator for a very low price."