3D Printed Dual Shaft Shredder, V1
All about my project on fabricating a plastic/paper shredder for low costs. This time, with two shafts.
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AstralGrandpa2.0 🚀
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AstralGrandpa2.0 🚀
added to the journal ago
Polished up gearbox - added motor mount
Today, I finished up the gearbox by creating a mount for the motor and finishing the gearbox enclosure. I will be using a 2826 brushless DC motor to drive the gearbox.
AstralGrandpa2.0 🚀
added to the journal ago
Working on Gearbox
So today I began working on the 3D printed gearbox. I think I'm going to use 608 bearings to reduce drag. This'll make the gearbox and gears quite chunky. My process for making gears is to generate them and then align them (stacked on top of each other), and then combine.
AstralGrandpa2.0 🚀
added to the journal ago
Brainstorming to create a gearbox
I am working on starting a 3D printable gearbox for the shredder. In order to create a reduction, I will need a small gear driving a bigger gear. And if I repeat that, a gearbox will be made!
AstralGrandpa2.0 🚀
added to the journal ago
Added Labels to Design
So I fixed up the design here and there, and I added some built-in labels for easy assembly. This was pretty easy to do with Fusion's text tool. I think this is a vital update since without the labels, it would be super easy to mix up which parts go where.
AstralGrandpa2.0 🚀
added to the journal ago
Researched some shredder design tips
So in this work session,I did a lot more enrichment in the world of industrial shredders. It is quite interesting to see all the variations of shredders that have their own unique selling point. In the case of industrial shredders, high torque motors are used. But for my case, I will need to make design choices that minimize the torque requirements.
AstralGrandpa2.0 🚀
added to the journal ago
Shredder Coming to Life
Did a lot of work in CAD, and the shredder seems to be getting closer and closer to the final goal! I decided to make the blades 5 toothed, a good balance of bite and grinding. I also modeled in the the hopper (safety first!). Lastly, I made the side wall blade cleaners. These should prevent the plastic from building up in between the blades.
AstralGrandpa2.0 🚀
added to the journal ago
More CAD Work - Blades + Shaft + Gears
Today, I did some more modeling work on the dual shaft shredder. I created custom shaft collars to secure the shafts, and I also created herringbone gears. I also made the framework for the blades.
AstralGrandpa2.0 🚀
added to the journal ago
Created First Base
So I do have some experience from the first shredder I made, so this went by a lot faster. The base is built to be extra chunky to take advantage of 3D printing. I plan to manufacture this shredder with m3 screws and nuts instead of m5, since I believe that more smaller fasteners can be stronger than fewer, larger fasteners.
AstralGrandpa2.0 🚀
added to the journal ago
Planning the Dual Shaft Shredder
After doing some research, it seems that dual-shaft shredders will have an advantage over single-shaft shredders in the sense that dual-shaft shredders will give off smaller, more uniform shreds. However, the design of dual shaft shredders is more complex, since there are two shafts - twice as many moving parts (blades, washers, shafts), and the necesity to transmit the rotation using gears.
Some helpful sources mentioned how different gear ratios will enable better shearing, so I think I can make multiple gear configurations in CAD. (1:1 and 3:2 gear ratios)
AstralGrandpa2.0 🚀
started 3D Printed Dual Shaft Shredder, V1 ago