Product overview A compact linear actuator assembly described as a 15 mm linear stepping electronic starter with a long 122 mm stroke. It combines a 2phase 4wire stepper motor driven mechanism and a block nut for direct, controlled linear motion. Designed for DIY projects and integration into small automation systems. Key benefits Precise controlled motion: The 2phase 4wire stepper design provides repeatable, incremental positioning for accurate linear travel. Extended travel range: 122 mm long stroke allows movement over a useful distance without secondary linkages. Antirotation block nut: Block nut design secures the load and prevents undesired rotation during translation for stable operation. Easy integration for DIY and automation: Compatible with common stepper motor controllers and drivers that support 2phase 4wire motors, making it straightforward to add linear motion to projects. Compact form factor: The 15 mm linear stepping profile keeps the assembly small and simple to mount in spacelimited applications. What it does and how it solves problems Converts rotary stepper action into controlled linear translation, eliminating the need for complex gearboxes or hydraulic systems. Provides lowcost, reliable linear actuation for tasks where precise incremental movement is required. Removes backlash and movement instability by using a block nut to hold position under load, making it suitable for repeatable positioning tasks. Important attributes Function: Linear actuator driven by a 2phase 4wire stepper motor for stepwise positional control. Stroke length: 122 mm long stroke for extended linear travel. Profile: 15 mm linear stepping configuration as specified for compact mounting and alignment. Nut type: Block nut included to secure the moving element and reduce rotation under load. Compatibility: Works with standard stepper motor drivers and controllers that support two phase, four wire motors. Requires appropriate driver current and voltage selection for reliable operation. Use case: Intended for hobby, prototyping, and light industrial automation in DIY assemblies. Installation and performance notes Requires a compatible stepper driver and controller. Select driver settings to match motor current and stepping resolution for desired speed and precision. Mount with appropriate brackets or supports to maintain alignment across the 122 mm travel. Fine tuning of microstepping and speed profiles improves smoothness and positional accuracy. Practical use scenarios Custom camera slider or focus rail: Add smooth, controllable linear motion to camera rigs for time lapse or precise focus adjustments. Robotics and CNC addons: Provide linear actuation for small robot arms, pick and place fixtures, or linear slides on compact CNC assemblies. Laboratory and test equipment: Integrate as a controlled actuator for sample positioning, valve adjustment, or dosing mechanisms in bench prototypes. Technical highlights 15 mm linear stepping configuration 122 mm long stroke Block nut included for antirotation and position holding 2phase 4wire stepper driven linear actuation Designed for DIY and small automation projects Why choose this actuator This unit offers an accessible, compact way to add precise linear motion using a familiar 2phase 4wire stepper interface and a substantial 122 mm stroke. The block nut and compact 15 mm profile simplify mechanical integration while providing solid positional control for prototypes and small automation tasks.