What are the general differences between milling and shaping.?

Answer 1

Milling: Primary cutting motion is rotation of cutter
Shaping: Primary cutting motion is reciprocating motion of the cutting tool

Milling: Genetrix and directrix are parallel
Shaping: Genetrix and directrix are perpendicular to each other

Milling: Cutting done by multi-point cutting cutting tool or milling cutter (it is so called as it has a number of cutting edges or teeth)
Shaping: Single point goose-neck tool is used

Milling: Rake angle of cutting edges (teeth) varies
Shaping: Rake angle remains constant throughout the whole cycle

Milling: T-slots, gears can be cut; V-groove cannot be done
Shaping: T-slots, gears cannot be cut; V-groove can be done

Answer 2

Milling is done with a rotary cutter. Shaping is done with a reciprocating tool.