Flaw

Lay

Waviness

Roughness

Mild steel

High carbon steel

High speed steel

Diamond

External cylindrical surface

Internal cylindrical surface

Both external and internal surface

Flat surface

Perpendicular to lathe axis

Angular to lathe axis

Parallel to lathe axis

Vertical to lathe axis

Power feed can be given

Good surface finish can be obtained

External taper thread can be produce

Only external taper can be turned