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| Joules:
Arbalist, I have this vague idea of making a Quorn tool and cutter grinder using 3D printed parts for the castings, but making the bearing surfaces and shafts out of metal. Since a tool and cutter grinder is generally very lightly loaded, the printed parts should perform quite adequately. |
| awemawson:
Design mountings for bellows into your parts holding the bars and holder assembly , as the grinding dust otherwise will embed into the soft(ish) plastic |
| nrml:
--- Quote from: Joules on December 17, 2015, 01:03:06 PM ---Arbalist, I have this vague idea of making a Quorn tool and cutter grinder using 3D printed parts for the castings, but making the bearing surfaces and shafts out of metal. Since a tool and cutter grinder is generally very lightly loaded, the printed parts should perform quite adequately. --- End quote --- That thought has been rattling in my head ever since Fergus mentioned it in another thread a while back. It would make a great project if someone building one could get a printed version up and running quickly and then in the long term slowly upgrade to castings if they choose to. You could have both a functioning tool and a long term project at the same time. |
| Joules:
Thanks Andrew, thats very true, but no intention of plastic on plastic bearings and printed parts allows labyrinth seals to try and keep the dust at bay. I have access to the Bonnelle grinder in 3D format. For me, not having access or finances for castings 3D printing has been a real eye opener, plus I can get a good surface finish too. If it needs mass you can always mix sand and epoxy to use as a filler or add metal stiffeners into the design. Development is RAPID. Let me see if I can find a 3D model of the Quorn Might be worth the effort to do a 3D printable model if others are interested. |
| efrench:
Here's a model: https://grabcad.com/library/bonelle-tool-and-cutter-grinder Have you tried printing with nylon or POM (Delrin)? |
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