Failure of a Tractor Spindle
A front wheel axle spindle on a tractor became damaged from a bearing failure. A replacement part would take 6 weeks to get if it was ordered from the factory, and the farmer needed the tractor for his spring planting. A new spindle was made at a local machine shop from solid steel of the same alloy as the original. After 2 weeks of use, it broke in half and the wheel fell off. Considering what you have learned in this chapter, what do you thing caused the failure of the machined spindle?