Robust peristaltic pump made from scratch
The peristaltic pump is perhaps best known for its ability to pump fluids without the pump mechanism coming into contact with the working fluid. This is essential for food safety applications and other situations where a pump could contaminate the fluid. [Maciej Nowak] built an excellent example of such a pump, made from scratch in aluminium.
The build video covers the machining process in detail, showing how the aluminum body was made on the lathe before installing bearings and silicone tubing. The pump shaft was then fabricated, along with a set of brass rollers to press down the tube, creating the pumping action. The rollers have also been lubricated to reduce friction on the tube. The pump is powered by a small DC motor, which sends the drive through a small toothed belt, giving the finished construction a rather industrial look.
We’re used to seeing a lot of 3D printed pumps on the spot. This build, although it requires a fully equipped machine shop, is much stronger than anything plastic, and you can easily use it to smash a window in an emergency too, an obscure feature nonetheless. requested by some knowledgeable pump customers.
[Maciej] shows construction by pumping green liquid, noting that the peristaltic design requires no priming, which greatly facilitates operation. It is also bi-directional and can be run very slowly if needed.
Overall, it’s a build that shows the benefits of metalworking as well as great design features of the peristaltic pump. Video after the break.