There are three sizes of sheaves depending on the type of scrape (diameters 250 mm, 300 mm and 400 mm).
The wire can be turned up or to the side using a sheave attached to the wall or floor.
Depending on the model, the frame of the sheave is either hot-dip galvanized steel or acid-proof.
The sheave is made of durable plastic, mounted with slide bearings and can be lubricated. The sheave can be attached to concrete by anchor bolts or to a concrete grid by T-bolts.
The motive power unit can use either a 10 mm stainless wire or a 10mm specialty rope having the same tensile strength as wire and exceptionally little stretch.