Tiny 8mm Precision Gear Stepper Motor Peristaltic Pump

Tiny 8mm Precision Gear Stepper Motor Peristaltic Pump delivers highly accurate, low-flow liquid dispensing in a remarkably compact form factor. By utilizing a miniature 8mm stepper motor and integrated reduction gearbox, this pump achieves exceptional control over fluid movement, eliminating backflow and cross-contamination. Its peristaltic design means the fluid never touches the pump’s internal mechanical components, only the medical-grade tubing. This makes it ideal for handling sensitive, corrosive, or sterile liquids with precision. You can effortlessly integrate this tiny pump into portable analytical instruments, laboratory dispensing systems, or automated medical devices where space and accuracy are critical requirements.

Key Features:

• High Precision Dosing: The stepper motor drive and gear reduction allow for step-by-step control, ensuring highly accurate volume dispensing, even at micro-liter scales.
• Contamination-Free Pumping: Fluid contacts only the tubing, preserving sterility and preventing corrosion of mechanical parts.
• Compact Size (8mm Motor): Integrates easily into miniature or handheld devices with limited spatial volume.
• Bidirectional Flow: The pump head can rotate in both directions, enabling both drawing and dispensing capabilities.
• Self-Priming and Dry-Running: The peristaltic mechanism ensures the pump can self-prime and operate safely without fluid.

Technical Specifications:

• Motor Type: 2-phase 4-wire Stepper Motor
• Motor Diameter: 8mm
• Rated Voltage: 5V DC
• Step Angle: 18° per step
• Gear Ratio: Approx. 100:1
• Flow Rate: 1–10 mL/min (based on RPM and tubing)
• Compatible Tubing: Silicone tubing, 1–2mm inner diameter

Mechanical Specifications:

• Pump Principle: Peristaltic (Roller Pump)
• Motor Diameter: 8 mm
• Roller Material: POM or Stainless Steel
• Tubing Material: Standard: BPT, Silicone, or PharMed Braid (Ensures chemical compatibility)
• Tubing Inner Diameter: Typically 1.0 mm to 2.0 mm

Dimensions:

• Motor Body Diameter: 8 mm
• Overall Dimensions: ≈ 40 mm x 25 mm x 20 mm (Length x Width x Height)
• Weight: ≈ 30 g to 50 g
• Shaft Type: Integrated, Non-Standard

Pinout and Wiring:

• Connection: 4-pin or 5-pin connector (Typically a 2-phase 4-wire or 4-phase 5-wire setup)
• Control Method: Requires an external stepper motor driver (like A4988 or DRV8825) connected to a microcontroller (Arduino, ESP32).
• Logic Pins: Step (or CLK), Direction (or CW/CCW), Enable (or ENA).
• Voltage Input Pins: V+ (Motor Power), GND (Ground).

Datasheet Reference:

• Download Tiny Pump Technical Specification

Commonly Used in:

• Laboratory and Analytical Instruments: Precise dosing in chromatography and auto-titration.
• Medical Devices: Small infusion pumps, drug delivery systems, and portable analyzers.
• Miniature Robotics: Micro-fluidic control in mobile or exploratory robots.

Applications:

• Micro-dosing Systems: Delivering exact, small volumes of reagents or chemicals.
• Automated Water Testing: Pumping samples and indicators in field monitoring equipment.
• Cosmetic Dispensing: Accurate filling of high-value liquids and serums into small containers.

Equivalent Models:

• DC Geared Peristaltic Pump: Simpler control (PWM speed only), lower precision, and less control over step volume.
• Micro Diaphragm Pump: Offers higher pressure but involves internal component contact with the fluid.
• Standard NEMA 17 Stepper Peristaltic Pump: Much larger, higher flow rate, and requires more space and power.

Package Includes:

• 1 x Tiny 8mm Precision Gear Stepper Motor Peristaltic Pump