The optibelt SRP timing belt with cast cams and coatings is manufactured in a single production step and used in conveying systems. The polyurethane is cast between the core mould and the special outer mould with correspondingly increased internal diameter or special outer moulds with the desired contour for the cams.By rotating the inner and outer moulds around the central axis, a shore hardness that differs from that of the teeth can be cast using a centrifugal casting process. Profile :The ALPHA SRP moulds are based on those of the ALPHA TORQUE and ALPHA POWER timing belts.