8mm Mini Metal Peristaltic Dosing Pump – Stepper Motor DC 5V

8mm Mini Full Metal Gear Peristaltic Dosing Pump with Stepper Motor

Precision meets portability in this ultra-compact 8mm full metal gear peristaltic pump. Driven by a two-phase, four-wire stepper motor, it delivers high-accuracy quantitative liquid flow control in a package weighing just 5.2 grams. Whether you're building a DIY chemistry dispenser, an aquarium dosing system, a lab automation project, or a miniature fluid-handling device, this self-priming micro peristaltic pump offers the precision and reliability you need.

Made in Mainland China.

Key Features

• All-Metal Gear Head: Full metal gear reduction pump head with copper rollers for durability and precise torque transfer.
• Bidirectional Flow: Supports both clockwise and counter-clockwise operation — reverse the liquid flow direction with ease.
• High-Precision Stepper Motor: 8mm two-phase four-wire stepper motor with 22-ohm phase resistance enables accurate, repeatable dosing.
• Silicone Pump Tube: Uses a 2.5mm silicone tube, compatible with a wide range of liquids.
• Self-Priming Design: No manual priming required — simply power on and the pump draws liquid automatically.
• Compact & Lightweight: Just 5.2g total weight, ideal for space-constrained builds and wearable/portable projects.
• Low Voltage Operation: Nominal DC 5V, rated current 150mA. Compatible with DC 3V–5V driver boards; can run on a single 3.7V lithium battery.
• Max Flow Rate: Up to 0.5mL/minute (tested with a compatible stepper driver board at rated voltage).

Specifications

What's in the Box

• 1 × Mini Peristaltic Pump (stepper motor + metal gear head)

Note: Stepper motor driver board must be purchased separately.

Important Notes

• Screen brightness and lighting conditions may cause slight color variations compared to product images.
• Allow for minor manual measurement deviations in listed dimensions.
• Lower supply voltage will reduce maximum motor speed and flow rate.

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Authoritative Reference

For guidance on safe handling of pumps and fluid systems in experimental environments, visit the OSHA Mechanical Power Transmission resource.

Frequently Asked Questions

Q: Does this mini peristaltic pump require manual priming before use?

A: No — this is a self-priming peristaltic pump. Once powered, it automatically draws liquid through the 2.5mm silicone tube without any manual priming steps, making it ideal for automated or remote dosing applications.

Q: What driver board do I need for this 8mm stepper motor peristaltic pump?

A: You will need a compatible two-phase stepper motor driver board capable of supplying DC 3V–5V. The driver board is sold separately. Our store's simple driver board supports this range and can also be powered by a single 3.7V lithium battery.

Q: Can this peristaltic dosing pump handle corrosive or chemical liquids?

A: The pump tube is made of 2.5mm silicone, which is compatible with many mild liquids. For corrosive, aggressive, or highly reactive chemicals, please verify silicone compatibility with the specific liquid before use. The metal gear head components should not come into contact with the pumped fluid in normal peristaltic operation.

Q: What is the maximum flow rate of this micro peristaltic pump?

A: The maximum tested flow rate is 0.5mL per minute when operated at the rated DC 5V using a compatible stepper driver board. Operating at lower voltages (e.g. 3V or 3.7V) will result in a reduced flow rate due to lower motor speed.