Gallery, Projects and General > Project Logs
Sheet Metal Brake and 3d Printer.
S. Heslop:
Some day I might actually start building something other than a CAD model. Price of the extusions comes to about £85, assuming they don't charge per cut. And not including delivery. If I was smart I could try mix and match the considerably cheaper regular extrusions against the V slot type depending on if they actually need the groove or not.
23 wheels are £91.91 at the UK based reseller, and £88.79 at the US site with shipping. It's alot of money for plastic wheels. I looked at these wheels right when I started thinking about 3d printers and if I remember right I priced it out machining my own and found it wasn't too much of a savings mostly from the cost of bearings, and the few cheap ones I bought to take a look at were all seized solid from tight fitting seals.
But with steel being pretty damned cheap, and the other hardware hopefully not amounting to too much, i'd like to think I could build the frame and moving parts for about £300. So I can get that done before worrying about electronics and the enclosure.
kayzed1:
Plastic wheels....
Skate board bearings and a lump of round plastic and make your own :)
S. Heslop:
--- Quote from: kayzed1 on September 19, 2018, 08:03:26 PM ---Plastic wheels....
Skate board bearings and a lump of round plastic and make your own :)
--- End quote ---
I've really thought about it. Just drilling right through and parting off, and hoping some retaining compound and a washer will be enough to stop the bearings walking out of the wheel, since that'd be alot simpler than a ledge in the middle. Then shoving that on a mandrel to cut the outside and chamfers. The 625 bearings themselves though would cost £52 from simplybearings, and as I said the cheaper ones I tried from ebay were all seized solid from the seals. Making my own at that point would probably still be cheaper, but not a huge savings and not a job I particularly want to do. I'll keep thinking about it and see if I can find that handful of bearings I bought. I bumped into them not too long ago but I forget where.
WeldingRod:
You can use shielded bearings if you want lower friction.
Sent from my SAMSUNG-SM-G891A using Tapatalk
S. Heslop:
Could also use flanged bearings to save on retaining compound and perhaps make them more precise than trying to line a bearing up flush or machine an accurate step. Just ordered 10 for £3.60 to see how they are. I also ordered 10 for £2.50 but didn't notice it was from China with a lengthy delivery...
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