Gashing p. pr. & vb. n. : of Gash

Example:
How to repair a gash in the wall?

Taxonomy
cutter, milling cutter, gears, universal milling machine, free encyclopedia, worm wheels, diameter, pitch diameter, worm, Society of Manufacturing Engineers, cross-section, tooth, helical gear, spur gears, bevel gears, sprocket, Equipment, chain sprockets.

Defination from the web:
Gashing was first used to rough out worm wheels using a universal milling machine, but then dedicated gashers were built to rough out other types ... The cutter is then angled to the gashing angle. ...