SE 58/58 Conveying screw element, Ø58 mm, 1.0D pitch, 58 mm long SE 58/58 runs in the compression and metering zone of a 58 mm co-rotating extruder. One diameter pitch, one diameter long, bi-lobed profile. We cut the bore to your shaft and gauge it with a spline plug before it ships. Where SE 58/58 sits in the screw A 58 mm machine needs a steady hand-off between the melting zone and the die. That is the job of this element. SE 58/58 carries a 58 mm pitch, so one full flight