Smartbolts have little discs in their heads that change color as the right amount of tension is applied to them. I recently installed a child safety gate with a similar mechanism: a red, spongy washer between the bolt and the frame; once the right amount of tension was on the bolt, the washer was squished down so much it disappeared and you could stop tightening.
Unfortunately, a torque-wrench does not measure bolt tension accurately, usually only about +/- 30%, because it does not take friction into account. The friction depends on bolt, nut, washer-material, plating, surface smoothness, machining accuracy, degree of lubrication and the number of times a bolt has been tightened. Fastener manufacturers often provide information for determining torque requirements for tightening various bolts, accounting for friction and other effects. However, in field applications, this information is often not available, practical or administered poorly.
(via Red Ferret
Indiana U is selling off a huge lot of lab equipment, including these space-pod-looking gantries. Winning bidder is responsible for dismantling and shipping. “To give someone an idea of how large these are, there are two pits that they sit in. Each of the pits are 28’x35’x10′ deep.”
Vertu, the “luxury” cellphone maker whose handsets look like drug cartel handguns and are always comically obsolete, went out of business last month, reports the BBC. It is to auction off its inventory. Bids start at $26,000. Thuy Ong: The auctioneer, G J Wisdom & Co, says the phones are a mix of concept models […]
Why we secretly love our cords. Tamara Warren: There’s a certain security in the cord. It’s the idea of connection, perhaps even dating back to our days in the womb. … A battery, no matter how sophisticated, is fleeting. When we have our cords with us, we are in constant pursuit of power, even when […]
The Pry.Me Bottle Opener holds tens of thousands of times its own weight, and you can pick one up now from the Boing Boing Store.This remarkable keychain is considerably smaller than any of your keys, but don’t let that fool you: it can easily open any bottle, and could even tow a trailer full of […]
Guaranteeing your privacy online goes way beyond checking the “Do Not Track” option in your browser’s settings. To ensure that your internet activity is totally hidden from Internet Service Providers, advertisers, and other prying eyes, take a look at Windscribe’s VPN protection. It usually costs $7.50 per month, but you can get a 3-year subscription […]
This project management bundle will help you get organized and learn how to lead a team to success. You can pay what you want for these five courses when you pick them up from the Boing Boing Store.To help you become an invaluable asset for your company, this bundle includes a curated collection of professional […]