PVD coating of indexable inserts has to face mainly two challenges:
1. The cutting edges look into all directions and require a very spacious batching. Only a very homogenous film thickness distribution will lead to the top level of quality.
2. The selling prices for standard products have reached a very low level. Inside of the coating furnace the utilization must be optimized. Outside the furnace in cleaning, pretreatment and logistics the handling has to be minimized.
Spear fixtures solve these challenges. With respect to the economical aspects spear fixtures put the cutting edges open into the optimum position. Beside of this the products may remain on the spear fixture of all steps of production and transportation.