Author Topic: Small Box Hinges  (Read 705 times)

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Offline Lbob131

  • Posts: 434
Small Box Hinges
« on: October 25, 2015, 10:56 AM »
Does anyone know  how  the 1/4   stop quadrant  is engineered  into the   hole  to give an accurate opening  angle of 92 degrees?


I think the stop quadrant will  only be in  the outer part of the hole. It also needs to be  an extremely tight fit  on the inner knuckle.
Splines?
Such a simple device  but  an amazing piece of engineering.
£29  pound per set.

Is EDM  CNC  machining involved?
« Last Edit: October 25, 2015, 11:26 AM by Lbob131 »

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Offline JSlovic

  • Posts: 92
Re: Small Box Hinges
« Reply #1 on: October 25, 2015, 11:33 AM »
I'm guessing they broached the hole.  Brass is relatively soft and the process provides a very accurate hole geometry.