This article  features making a fly cutter designed to hold two carbide inserts.  See Article Number 21 for additional information on fly cutters. 

The head size is 60 mm x 22 mm x 22 mm, mild steel.  The shaft was made from 12 mm free-cutting steel.

Machining slots in head.

Machining ends of head.

The cutting face of the head with  carbide insert locked in place.

Fly cutter used to surface cast iron.