Main PCB holder

This part is stamped on a progressive die from flat sheet and has many right-angle bent tabs, round holes, slots and burred holes, so each station much be precise to hold hole positions and the height of the bent tabs.

Burr on the outer edge is limited to 0.05mm at most, so the die must stay sharp and be maintained regularly. the burred holes need enough height to give M3 and M4 threads a sufficient number of turns.

Tapping is done after nickel plating, so the plating layer must not clog the holes of affect thread accuracy.