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Car Crusher Hinge

posted Dec 11, 2011, 2:44 PM by Ray Pena   [ updated Dec 11, 2011, 3:28 PM ]
Here is a question: if you wear out a car crushing machine, where do you go to get it fixed? Diamond State Machining of course.  a few years ago we had the privilege of building a new hinge for a car crushing machine which had worn out severely.  Fast forward to 2011, and now we have had the opportunity of building the hinge for the remaining side!  Below are the images for the newly built car crusher hinge.  What is obvious from the photographs is the amount of precision machining needed to build this hinge.  The hinge pin below measures 4" in diameter and just over 20' long! We made bronze bushings that were pressed fit into the hinge sleeve.  To do this we heated up the hinge while simultaneously cooling down the bushing which we machined oversize for this purpose.  Once at temperature, the two components were quickly introduced to each other and fit together. When the parts normalized to room temperature the fit is permanent!!!
These images are of the hinge sleeve and
bronze bushings.  Note the threaded holes,
these are for grease fitting which will be
threaded once welding to the
crusher is complete
hinge sleeve with bronze bushing
hinge sleeve with bronze bushing
hinge sleeve with bronze bushing
hinge sleeve with bronze bushing
Note the threaded holes above, these are
for grease fitting that will be installed
after welding is complete.
inside of bronze bushing
inside of bronze bushing
Note the grease holes. there is a grease
reservoir between the steel sleeve and the
bronze bushing.  Once full a controlled amount equal to the amount added for maintenance is pushed between the bushing and the hinge pin.



These images are of the hinge pin. 
It was turned, Ground and Polished. 
It measures 4" in diameter and over 20' long.

Note the straightness of the pin and the surface quality

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