Belt-Driven Linear Actuators – MT Series with Ball Bearing Guides

Belt-driven linear actuators convert the rotary motion of an electric motor into straight-line movement. The motor turns a toothed pulley that engages with a flexible, steel-reinforced belt with evenly spaced teeth, called a timing belt. The timing belt is connected to a carriage, which is the moving platform that supports and carries the load along the actuator. Because the teeth on the belt fit into matching grooves on the pulley, the belt can transfer motion without slipping, allowing the carriage to move quickly, smoothly, and repeatedly.

This drive system is especially well suited to long-stroke applications. Screw-driven actuators rely on a metal screw that rotates through the full length of travel. As the screw becomes longer, it can bend, vibrate, or whip at higher rotational speeds, limiting both stroke length and performance. A timing belt does not have the same restriction because it travels in a continuous loop around the drive and idler pulleys rather than spinning as a long shaft. This allows a belt-driven actuator to achieve faster movement over greater distances while maintaining a relatively lightweight design.

The MT Series includes MTB, MTE, and MTS actuator configurations, each using a different profile rail guide arrangement to support the carriage and control the load. The timing belt moves the carriage forward and backward, while the linear guides keep it aligned and resist forces that could cause it to tilt, twist, or shift during operation.

MTB actuators use one internal recirculating-ball profile rail guide with two runner blocks supporting the carriage. Placing the guide inside the aluminum profile helps protect it from the surrounding environment and creates a compact actuator for fast, long-travel motion. This configuration is well suited to applications with balanced loads and moderate moment forces.

MTE actuators use one internal profile rail guide and one external profile rail guide. The additional external guide gives the carriage a wider support structure than the MTB, improving rigidity, load capacity, and resistance to pitching, rolling, and yawing. This arrangement provides increased carriage support without requiring the full width of a design with two external guides.

MTS actuators use two external profile rail guides. Positioning both guides outside the actuator body creates the widest support base in the MT family, providing greater rigidity and stability for heavy, wide, or off-centre loads. This configuration offers the strongest resistance to moment loads and is well suited to large mounting plates and demanding automation systems. Because the guides are external, they are more exposed to dust and debris than the internal guide used on the MTB, so the operating environment and maintenance requirements should be considered during selection.

Built around lightweight, corrosion-resistant anodized aluminum profiles, MT Series actuators are available in multiple frame sizes and drive configurations. Features may include steel-reinforced timing belts, adjustable belt tensioning, recirculating-ball profile rail guides, rigid aluminum carriages, and flexible motor connection options. The series is designed for gantry systems, packaging equipment, material handling, pick-and-place automation, machine loading, transfer systems, and other applications requiring fast, repeatable motion over long distances.

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