Deep Hole Drilling for Railcar Couplers and Draft Gear
Railcar couplers and draft gear components are not the first thing that comes to mind for deep hole drilling, but I have done my share of them. The coupler needs a through-bore for the connecting pin that joins one car to the next. The draft gear housing needs bores for the cushioning pistons. These are not precision components by aerospace standards, but they need consistent, repeatable bores that hold up under decades of cyclic loading. ...