SINTERED STEEL INSERTS (IBM)
They are made of sintered steel with ZRN coating. The type of steel and the coating give the insert a high hardness that enables it to withstand excellently the repeated impacts typical of this type of machining.
It is important to note that, for some inserts-particularly those with P9 and H7 tolerances-it is possible to make bevels of 0.2×45°.
In this way, during and at the same time as the execution of the tab seat, any burrs formed during machining are eliminated.
The special shape of the inserts allows grinding to be performed 2 to 3 times, resulting in reduced costs. The insert sizes shown in Fig. 3 are always available from stock.
The inserts are produced in metric and inch sizes.
In P6- and H7-tolerance versions, the insert can be requested with a chamfer of 0.2×45° at the point of intersection between the hole and broached slot walls, so as to leave the hole burr-free.
Carbide inserts (IHM)
