Hardness for idler shaft
Hardness for idler shaft
(OP)
what sort of hardness should i be targeting for an automotive idler shaft? its the idler for the timing belt. i'm interested in the hardness of the face for the oil lip seal and journal for the bearings? the material is EN26 with harness 32HRC is this ok for the seal face and for a typical journal bearing? i can get it heat treated / nitrided but maybe this is over kill?





RE: Hardness for idler shaft
You mention journal bearing. So this "idler" is in the crankcase, oil lubricated along with crank, cam, etc?
If the idler shaft size and material is otherwise very adequate for any applied loads, I'd consider the recommendations here -
http://www.mahle-aftermarket.com/media/local-media...
Journal and housing tolerances near the very end. page 177
Importance of directional polishing around page 20.
Some pictures of what can go wrong starting around page 6
RE: Hardness for idler shaft
RE: Hardness for idler shaft
RE: Hardness for idler shaft
RE: Hardness for idler shaft
Maybe designing in a SpeediSleeve for the seal would be justified.
RE: Hardness for idler shaft