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| Chuck in E. TN:
John(Doubleboost), Very neat repair you demonstrated in Sunday Nite Nightcap # 66 (0iPSQ&index=1). Is there a formula or rule of thumb that lead you to choose 7mm to bore for a M4 nut? Any correlation that can be used for such repairs using SAE nuts? All the best to you and Debs. Chuck |
| studders:
I've used that method a few times in wood, never occurred to me to use it in aluminumium. One to remember. |
| studders:
--- Quote from: mklotz on April 13, 2015, 11:15:54 AM ---To do this we need to calculate the diameter of a nut ACROSS THE POINTS ......... d = 2*r w = 2*a From the diagram, we have, a = r * cos(x) so: 2*a = w = 2*r*cos(x) = d * cos(x) Solving for d, d = w/cos(x) For a hexagonal nut, x will be 30 degrees so, cos(x) = sqrt(3)/2 = 0.866 Finally, d = w/0.866 = 1.1547 * w --- End quote --- Doubtless that was the very method John used to arrive at 7mm. I favour the 'guess it and whack it' approach. |
| awemawson:
I claim prior invention on this as per my posting in my Fanuc Wire EDM rebuild thread in October 2014 :lol: (Actually the idea was suggested to me by a poster on the MIG welding forum) |
| mklotz:
--- Quote from: studders on April 13, 2015, 11:26:21 AM ---I favour the 'guess it and whack it' approach. --- End quote --- I'm sure you do. |
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