Threading

The thread machine is used for threading holes (usually to prepare the hole to accept a bolt or machine screw) and for threading protrusions (usually to prepare the protrusion to accept a nut or a machine element with mating threaded hole). 

Tapping is a machining process that uses a multipoint cutting tool (tap) to produce uniform, internal, helical threads. Either the tap or workpiece is rotated and advanced relative to the other. A hole with a diameter slightly smaller than the major diameter of the thread is used.

Die threading is a machining process that uses a cluster of multipoint cutting tools (chasers) to produce uniform helical threads on the external surface of a cylinder. The chasers move parallel to the axis of the workpiece.

Thread cutting is a machining process that uses a single-point tool to produce a uniform helical thread form on the external surface of a cylinder or cone. Common machines used for single-point threading are CNC Lathes. The tool is held in a tool holder, the workpiece is held in a work holding device.

Possible shapes

Threaded holes and protrusions.

Example parts

Holes for bolts, screws, and threaded rods and respective mating parts.

Advantages of Threading

Allows to fasten parts together.

Notes

Consider re-tapping after powder coating or plating.

Processes: Turning Milling Laser Cutting Water Jet Cutting Wire EDM Tapping Bending Turret Punching Fine Blanking Blanking Steel Rule Die Cutting Drawing Injection Molding Extrusion Metal Casting Thermoforming Forging Springs Wire forming Powder Coating