does anyone know how i could reground a crankshaft to fit a undersized rod what type of tools or machine would i have to have what is the cheapest way to turn a crankshaft journal

Put a little valve grinding compound on the rod and rod cap Put the bolts back in,and just snug them. Then hold the crankshaft at each end and spin the rod/piston around and around.Thghtening the bolts and reapplying compond as needed.This will work....but it takes a while.And leaves the crankshaft journal and the rod smooth.

anybody else have any suggestions besides buying over thousands dollars in machines to do the work is there any way i could put some attachment on a die grinder and ground the crankshaft journal

Check your local "Mom & Pop" machine shops. You might find one that will grind it for you for a reasonable price.
I am a machinst, but I wouldn't touch a crank journal in my home shop!

Rick

What kind of engine is the crankshaft out of??

Jusy Any Type Of Crankshaft I Do Smallengine Repair Fulltime And I Was Wanting To Know What Are Some Of The Alternatives To Grinding Crankshft Journals Under Size How Much Would A Machine Cost To Do This Kind Of Work

Oh, well it depends on the crankshaft, around here it costs about $50.00 to have a crank turned under, and that is very close to the replacement cost of many cranks, so I just replace them. Now if it were on a twin cylinder or larger engine, then I will have them turned. Most of the time the damage extends beyond the crankshaft to the cylinder, cams and bearings in the engine making rebuilds not very cost effective!