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soya nema 8 20mm open loop hybrid micro stepper motor

SOYA NEMA 8 (20mm) Ultra-Miniature Open-Loop Stepper Motor Series

The SOYA NEMA 8 (20mm) is an ultra-miniature, high-precision 2-phase open-loop hybrid stepper motor series engineered by SoyaMotor. Tailored specifically for severe micro-space constraints, it features a 1.8° step angle and standard output shaft configurations. Available in 30mm, 33mm, and 42mm stack lengths, it provides exceptionally stable positional accuracy and reliable holding torque up to 300 g.cm—perfectly optimized for medical automated pipettes, fluidic pumps, optical scanners, and compact automation devices.

Model:
SY20HS
Brand:
SOYA

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Product Description

SOYA NEMA 8 (20mm) Open-Loop Hybrid Stepper Motor Series

Unlock maximum precision in confined spatial frameworks with the ultra-miniature SOYA NEMA 8 series hybrid stepper motor. Featuring a compact 20mm square frame size and a standard 1.8° step angle, this open-loop actuator balances minimal footprint constraints with stable, smooth rotational force. Available in multiple stack lengths (30mm, 33mm, 42mm) and precise current ratings to integrate seamlessly into high-end clinical instrumentation and micro-mechanisms.

Key Features & Benefits

⚡ Ultra-Miniature Profile The ultra-compact 20mm frame footprint allows the motor to fit into complex, tightly enclosed handheld assemblies, desktop laboratory devices, and medical pumps.

⚙️ 4-Lead Reliable Wiring Configured with 4 premium industrial lead wires to guarantee stable phase current distribution and optimal magnetic flux tracking under high-frequency indexing.

Flexible Structural Customization Our factory delivers flexible customization profiles, including optimized winding resistance for low-voltage batteries, custom shaft geometry, and specific connector integrations.

Traceable In-House Build Manufactured directly on our own factory floor utilizing high-silicon stator steel and precision bearings to drastically reduce electrical heat and cogging noise.

Typical Applications

Medical Automated Pipettes Fluidic Peristaltic Pumps Optical Medical Scanners Desktop Semiconductor Sorters Precision Textile Feeders

Technical Specifications

Model No.	Step Angle (°)	Motor Length (mm)	Current/ Phase (A)	Resistance/ Phase (Ω)	Inductance/ Phase (mH)	Holding Torque (g.cm)	Leads (No.)	Rotor Inertia (g.cm²)	Mass (Kg)
SY20HS30-0604	1.8	30	0.60	6.5	1.5	180	4	2	0.06
SY20HS33-0604	1.8	33	0.6	6.5	1.6	200	4	2	0.07
SY20HS42-0804	1.8	42	0.8	5.4	1.5	300	4	2	0.08

Dimension & Mechanical Drawings

NEMA 8 (20mm) Open Loop Stepper Motor DWG

Why Choose SOYAMOTOR?

Our roots go back to 2002 as “Songya Motor Control Factory”. In 2017, we incorporated as Changzhou Songya Electromechanical Co., Ltd., marketing our systems worldwide under our registered brand SOYAMOTOR. Leveraging over 20 years of deep expertise in stepper, servo, and brushless motor manufacturing, we design and produce a comprehensive range of premium CNC digital cutting tools on our own shop floor. Beyond oscillating knives, our in-house production includes servo oscillating knives, drag knives, kiss-cut knives, creasing wheels, rotary knives, V-cut tools, and punching tools—delivering factory-direct precision with 100% traceable quality.

✓ 20+ Years Industrial Expertise ✓ In-House Motor & Tool Manufacturing ✓ 100% Traceable Quality Control