The fast tool servo (FTS) is a custom-designed tool holder used to
cut piston pin holes. Piston pin holes have a unique non-circular
geometry, they have an oval hole with a trumpet-shaped profile. This
geometry is difficult to create because the work piece must remain
stationary. The FTS mounts to a lathe and is designed to accept multiple
sizes of boring bars. It uses a piezoelectric actuator to actuate the
boring bar about a flexure.