Shaft, particularly a partly tubular camshaft

A camshaft comprising:

• a tubular part extending along and rotatable about an axis and formed with a radial intake port for conducting a gas radially into the radial intake port and axially through the tubular part;
• a plurality of cams spaced along the tubular part;
• and
• a splash guard mounted on the tubular part at the radial intake port between adjacent cams for joint rotation with the tubular part and having a radially outwardly exposed and tubular center section coaxially surrounding the tubular part between the cams and formed with radially throughgoing holes and radially and axially extending ribs between and offset from the holes, the center section of the splash guard and the tubular shaft part forming a radial gap at the intake port, the holes being offset axially or angularly on the tubular shaft part from the intake port for gas flow into the openings, then axially or angularly along the gap around the tubular part, and then radially into the intake port and into the tubular part.