Hydrodynamic lubrication is used on all types of machinery,its the basis for lubricating internal combustion engine shafts,pressurized or gravity system,insert or poured bearings,high or low compression just about every engine runs on a thin film of oil. Whats interesting to me is its a standard measurement,.001 clearance per inch of shaft diameter..run a 10 inch crankshaft journal? its hydrodynamically supported by .010 film of oil.This is where folks get confused with journals and bearing sizes and all kinds of hoohah about engine oil...get .0015 with a model a rod and it will live a long life,use an engine oil with high load and shear characteristics to protect the film.Diesel grade engine oils have these additives.
If the bore is cut correctly and the crankshaft and bearings are fit to .0015 on your rods you are golden.If you can shim your insert bearings to achieve .0015 youre golden...yep,the golden rule doesnt change..fire your machinist? maybe but you can make a tight insert work with fitted shims