Precimaster is a throwaway head reamer. Some salient features of the head reamer include: , simple in design, effective, accurate, modular and adjustment free. Available in sizes from 0 4 to 60 mm, seco internal through coolant is offered by precimaster offers internal through coolant. Composed of a body and a removable head the clamping system guarantees high precision and the repeatability required to achieve h7 tolerance. It is easy to change the reaming head without removing the tool from the spindle. Three possible lead geometries, combined with four different grades. Everything has been designed for the highest performance. Good surface finish and chip control is achieved by an optimised lead geometry achieves good surface finish and chip control. A choice of four grades offers the best possible performance in all material groups at optimized cut-ting conditions. The precimaster clamping system is reliable and guarantees repeatability which . It allows an accurate repositioning of the cutting head to achieve h7 tolerance. Clamping/unclamping screw is located on the side of the tool body. It is easy to change the reaming head without removing the tool from the spindle.