The width of cutting edge of a parting off tool varies from

The width of the cutting edge of a parting-off tool depends on the type of material being cut and the rigidity required for the operation.

A typical range for parting-off tools used in lathe operations falls between 5 mm to 20 mm, which provides a balance between strength and precision.

Narrower tools (closer to 5 mm) are used for smaller workpieces and precision cuts, while wider tools (up to 20 mm) are preferred for heavier and tougher materials to reduce deflection and ensure stability.