valve guide, valve guides, precision shafts, diesel engine components, gear spline, spline rolling,splines,precision machining, jit delivery, iso 9002, qs9000, qs 9000, iso9002, concurrent engineering, prototype, machining services

for oem certified parts and assemblies including valve guides, conversion guides and drive shafts, helio precision products in lake bluff, il provides qs9000, iso9002 quality.