Peristaltic Pump v3.0 – Smooth Flow Upgrade - Free 3D Print Model

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Tansky

Hobby & DIY>Robotics

IP Report

Print Profile(1)

All

A1 mini

P1S

P1P

X1 Carbon

X1E

H2D

H2D Pro

H2S

P2S

H2C

X2D

A2L

0.2mm layer, 3 walls, 25% infill

Designer

1.9 h

2 plates

4.7(10)

Open in Bambu Studio

Boost

166

388

363

149

Released

Bill of Materials

List other parts

M3x30 screws x 4:
bearings 686zz x 6: or similar: inner Ø 6 mm / outer Ø 13 mm / width 5 mm
Flexible hose 6/4 x 1: outer diameter 6 mm, inner diameter 4 mm
NEMA17 stepper motor x 1: shaft length at least 23 mm

Description

This is an advanced peristaltic pump with pulsation compensation.
The improved design features a dual-stage rotor system, where the second stage is offset by 60%.
This means when the pressure pulse from the lower stage ends, the upper stage begins – effectively smoothing out the flow and minimizing pulsation.

Perfect for applications where a stable, continuous flow is important – such as food printers, dosing systems, or lab automation.

What’s new in version 3.0?

Larger hose diameter → higher flow rate
Enhanced internal geometry → even less pulsation
Improved rotor stability
Compatible with standard NEMA17 stepper motors

⚙️ Flow rate:

~40 ml/min at 1000 steps/min
~60 ml/min at 1500 steps/min
Flow rate may vary slightly depending on hose elasticity and liquid viscosity.

🧩 Additional components required (not 3D printed):

4x M3x30 screws
6x bearings 686zz (or similar: inner Ø 6 mm / outer Ø 13 mm / width 5 mm)
NEMA17 stepper motor (shaft length at least 23 mm)
Flexible hose with outer diameter 6 mm, inner diameter 4 mm

🖨️ 3D printing materials:

All parts in this prototype were printed with PLA, but PETG, ABS, or ASA are also suitable depending on your application environment.

🛠️ Assembly:

Assembly is simple and intuitive – all parts are designed for easy fitting, no special tools required.

Comment & Rating (16)

@funkvn

Isn't there a hole missing here for the shaft? @tansky

@4ndreDe

Boosted

Print Profile

0.2mm layer, 3 walls, 25% infill

A stunning design, but the dimensions were 100% inaccurate on my Bambulab A1 mini I will likely have to scale everything

The profile uploader has replied

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@tansky

I've added the entire assembly as a STEP file – this way, you'll get better accuracy or be able to make quick adjustments if, for example, your motor has a different bolt pattern.

(Edited)

@user_707427394

After installation is complete I have a question why does the bearing require a sleeve instead of directly contacting the stepper motor shaft Wouldn't it be better if the shaft and bearing transmitted the force together this way

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@kemar

Boosted

Thank you ! Is it possible to share a previous version or design files ? I only have a short axis motor an would like to try a single stage version.

@user_707427394

Hello, may I ask if this requires a 42 stepper motor with a round shaft?

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@4ndreDe

Boosted

weiter so

@user_904439321

Print Profile

0.2mm layer, 3 walls, 25% infill

@user_1146802441

Print Profile

0.2mm layer, 3 walls, 25% infill

@justlittleoldme

Print Profile

0.2mm layer, 3 walls, 25% infill

@cesarantonio_

Print Profile

0.2mm layer, 3 walls, 25% infill

License

This user content is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.