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Sean Sheedy
441 followers -
Wireless & mobile engineer; former Java ME Executive Committee member
Wireless & mobile engineer; former Java ME Executive Committee member

441 followers
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Sean's posts

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I remembered that I could draw on my monitor with a dry erase marker. It makes designing in OpenSCAD soooo much easier!
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Drilling offset holes for eccentric spacers on the big drill press at Makersmiths on a Saturday night! 
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Making eccentric spacers with the new metal bandsaw at Makersmiths.
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What's this kind of DC power connector called, you may ask (or maybe not)? It's an EIAJ connector, of course!

Did you know that the city of Wafangdian has 700 bearing factories? I learned this while looking for bearings for our makerspace's large CNC and a replacement for a no-name bearing that died one month after installation in a small blower motor in my Sprinter.

The engineering forum thread below was an eye-opener.Two posts stand out. One is from an importer, who says that you can buy any bearing if you're using it for a wheelbarrow. Otherwise, if you're not prepared to visit factories and test batches of bearings, you will need to stick with brands known for quality.

Another post is from an engineer claiming to work at an older bearing manufacturer in Wafangdian. He cites challenges including raw material, tool problems, and improper assembly which make it difficult to produce quality bearings.

The takeaway - if you need bearings, there's probably an engineering reason that they need to be of decent quality. The inexpensive no-name bearings that are plentiful on Amazon and Ebay might not cut it for anything other than a short science project or a wheelbarrow. It's not where it comes from that matters, but who it comes from.
 
http://www.eng-tips.com/viewthread.cfm?qid=250073

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The snow was sticking to the shovel but it comes right off blue exterior painters tape!
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Digging out and preparing blocks for a snow structure!
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Some additional progress today on the large CNC plasma cutter/routing table: cable management ideas. 
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My very first weld, this weekend at #Makersmiths. It was going great until I lost sight of the seam. Apparently, bright work lights can help with that.
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