Model 60GM1615BY 15mm stepper reducer electronic starter (planetary electronic starter) Key benefits Compact precision gearing that increases torque and reduces speed for finer control of small stepper motors. Converts each 18 degree full step to much smaller angular increments, enabling smoother motion and higher positioning resolution. Lightweight and easy to integrate into compact assemblies where space and weight are limited. What it does and why you need it Provides three stage planetary gear reduction for Brushless DC stepper motors, delivering an approximate reduction ratio of 1:225 to multiply torque and improve control. Operates at DC 5 V with a phase resistance of 10 ohms, matching common small stepper motor drivers and power supplies. Ideal when you need higher torque, slower rotation, or greatly improved step resolution from a 15 mm stepper motor while keeping a minimal footprint. Key features and specifications Model: 60GM1615BY Product name: 15mm stepper reducer electronic starter (planetary electronic starter) Type: Brushless DC stepper gear reduction, three stage reduction Rated voltage: DC 5 V Phase resistance: 10 ohms Wiring: Two phase four wire (black brown wire A+ A, red orange wire B+ B) Step angle of 15 stepper motors: 18 degrees Reduction ratio: approximately 1:225 Effective step angle per full step: approximately 0.08 degrees Line length: 60 mm Output interface: 4 mm single head female seat Weight: 30.1 grams Compatibility and installation notes Designed for use with 15 mm stepper motors specified to 18 degree step angle. Check driver compatibility for DC 5 V operation and 10 ohm phase impedance. Standard two phase four wire connection simplifies wiring to common stepper controllers. Confirm wire mapping before powering. Compact 60 mm cable length and 4 mm female output seat allow direct mounting in small modules and assemblies. Performance and build Three stage planetary reduction provides stable, concentric torque transfer and compact packaging for applications requiring precise motion control. Low weight and small diameter make it suitable for space constrained designs without significant added mass. Practical applications Precision pan and tilt mechanisms for lightweight cameras or sensors where fine angular control is required. Small robotics joints and grippers that need increased torque and smoother motion from a compact stepper motor. Micro positioners, valve actuators, or optical focus mechanisms in instruments that require slow, repeatable movement and resolution. What to expect in use Noticeably higher output torque and much finer step resolution compared to a directdrive 15 mm stepper. Simple electrical integration with two phase four wire stepper drivers and standard 5 V supply. Compact mechanical interface for quick mounting in prototype and production designs. This unit delivers compact planetary reduction and precise control for small stepper motor systems while preserving straightforward wiring and installation.