I THINK the objects u ref. to as castings are actually formed by
pressure and perhaps some heat but the metal never melts and the
object remains poreous thus allowing it too absorbe oil and be
used as a bearing.
I THINK the objects u ref. to as castings are actually formed by
pressure and perhaps some heat but the metal never melts and the
object remains poreous thus allowing it too absorbe oil and be
used as a bearing.