Mining Equipment

[trallee]

I work on mining equipmet daily and it is a very interesting field. I see fatigue failures that go beyond any textbook could ever tell. If anyone would like to share failures I would be more than interested to share my experiences.

 

[MikeVV]

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I remember working as a young shop aid at a farm machinery dealership.&nbsp;&nbsp;We took a wheel tractor in on trade and discovered that it had a crack at the wheel shaft.&nbsp;&nbsp;The shaft (steel, hardened) was approximately 3 inches in diameter (solid).&nbsp;&nbsp;It had a keyway that ran for most of its 24 inch exposed length.&nbsp;&nbsp;The crack was oriented in the plane that exists when viewed from the end and it had a &quot;half-moon&quot; shape that extended through 1/2 of the crossectional area.&nbsp;&nbsp;<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It was easy to find when the tractor was parked so that the crack was oriented on the bottom - this put the shaft in bending such that it opened the crack.&nbsp;&nbsp;I drove the tractor approximately 50 yards into the shop so that I could replace the shaft.&nbsp;&nbsp;If I had to do this again, I would have figured out a way to make this move safely (it would have collapsed if the crack failed during my drive and the wheel could have crushed me).&nbsp;&nbsp;<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I never saw the crack's surface after replacing it.&nbsp;&nbsp;The shaft was sent to a scrap metal yard.&nbsp;&nbsp;I often wonder how many more turns it had left...

 

[cemgercek]

trallee;
im attending mining engineering department and im interested in mining machine. can u send me site adresses about mining machine??
thanks