Roller shell
PROTOT supply roller shells in all type patterns. Our roller shells are designed to match the excellent performance of its dies. Roll shells operate under extremely harsh conditions. Therefore, it is vital that the dimensions are accurate and the hardening process is of the highest standard.
Material
20CrMnTi
GCr15
Automated countersink
Carefully following the drill pattern, the countersink is machined into the die track. Countersink sizes are selected to increase the pelleting performance.
Gun drilling
A fast and accurate process for producing highly polished extrusion holes
CNC accuracy
CNC machining centers programmed with die dimensions for all pellet mill makes and models machine the basic shape of the die with precision accuracy
Vaccum hardening
A hard-wearing surface in the holes will maximize the life of the die. Air is removed to create an inert environment. The die is heated in stages controlled by a microprocessor up to a temperature of 1,010 °C, and the steel becomes a hard molecular structure as a result of this process.