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The joined blocks can be pulled apart with you hands. See the first video posted in this comment: https://news.ycombinator.com/item?id=20366089 https://news.yc
by greenyoda 7y ago
The joined blocks can be pulled apart with you hands. See the first video posted in this comment:
https://news.ycombinator.com/item?id=20366089 https://news.ycombinator.com/item?id=20366089
So the bond is not comparable in strength to gluing or welding.
- TeMPOraL 7y agoI watched both. I know it's not comparable, but it seems plenty strong. In the case of the video, I'd guess if you'd double the contact surface, you could easily hang a coat on it. My question is, how long would the join last.
- stan_rogers 7y agoFor about as long as the parts on both sides of the join stay flat. And therein lies the rub. Permanent cold welding works just fine on small contact areas, but on anything large you're at the mercy of thermal movement, etc. How much can that be? Quite a bit, actually [1]. That's just breathing on a braced precision straightedge, and the difference in temperature across the piece is easily measurable. [1]https://youtu.be/UG6LV8v8W-0?t=1922 https://youtu.be/UG6LV8v8W-0?t=1922
- jcims 7y agoFWIW the Starret tips on maintaining gauge blocks says not to leave them wrung overnight.