Four Jaw Self Centring Chuck
Description
I added my take on the design by giving it more mass, taken away the need for wingnuts (making it safer) and generally done as much as possible to make it useful - The nice thing about this design is that it could be made in any material with very little changes to the file. It's a good size chuck maxing out at the makerbot's 10cm build surface wide and 7cm tall.
You can design new Jaws to suit your requirement! It is a great tool to have either fitted to a lathe, drill, dremel or just being used to hold items on your bench.
Had an educational time modelling in Carrara and Hexagon which I used to create this thing. I've been using it for a longtime doing fun stuff and mixing it with photography but never tried anything precise.
You are going to need 8 M4-40 cap screws, 8 locking nuts, 1 M7-40(min) hex bolt and nut.
Video of the chuck in action youtu.be/94ZhwGUWB5I
Instructions
Use the capscrews on the jaws to lock and loosen the chuck, rotating the grips will move the jaws in and out. It is important to tighten all four jaws!
Safety with anything that can blind you should be taken seriously!
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I printed it at 50% of the original size and it fit together really well. I had to widen the slots with a dril to use no.4 machine screws. I didn't use the skids and have not printed the jaws as this was more a proof of concept print before printing it little larger. :)
Nice one, thanks for printing it :) - I did actually print it full size and got very nice quality at 50mm/sec but have not got round to uploading pictures and video of it in action, i'll do that in the next day or two -it's a massive bit of kit and everybody was amazed that i could print something like it. Redesigning it for rear jaw locking and have a new set of tapered jaws with reverse grips for for v2 (although v1 jaws work well). The cam slots needs reversing in direction as well as I get confused closing and opening and it isn't the right direction for a lathe in forwards running (it should if anything tighten with pressure)
POC== ?
I don't see any arrogant comment here? You deleted some or?
Awesome chuck design!
Would love to see a printable lathe at some point...
In terms of how items come out of the printer, there's two things that influence it strongly; first is shrinkage. ABS shrinks a few percent when it cools - so I generally design my pieces with a 3-5% tolerance. In addition, you can get "squis
hing" when printing - basically, every piece you print out is at least slightly liquid on the top layer as its printed - this forces the perimeters (inside and outside) out slightly. The effect is difficult to predict, as it depends on how big the object is - smaller objects take less time to print
per layer, so the layer is more "squidgy" while it's being printed. It also depends on ambient temperature, your bot's characteristics, and if you're using active cooling.
The best way to handle squish is to print and mount a small fan to blow on the top layer of the object. Bonus points for cre
ating a laminar flow that doesn't blow across the nozzle or the hbp...
How cool would this be for eggbot like structures too? Wonder if it can handle the reverse rotations and stops without loosening?
This is great! I'm in the middle of designing a printable lathe, and was mulling over chuck designs. Perhaps I'll give this an attempt on my mendel and see how it turns out!
Thanks, would love to see it made and working and obviously any improvements ;)
Before you spend to much time designing an entire lathe you may want to look at this. http://www.thingiverse.com/thi...
Great work on the chuck, I was looking at a wooden version online a few weeks ago that someone had made.
License
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This is great! Very impressive and inspiring!