Каталог Stellram токарный инструмент

Naming Nomenclature

Depth of Thread

Thread Angle Helix Angle

External Internal Thread Thread

Depth of Thread

Depth of Thread	Major Diameter
The distance between the Crest and Root.	The largest diameter of the thread form.
Pitch	Minor or Root Diameter
The distance between two thread form peaks, defined	The smallest diameter of the thread form.
as TPI (thread per inch) in millimeters or as an inch
decimal.	Thread Angle
	The included angle between the individual flanks.
Pitch or Effective Diameter
Is where the theoretical cylinder diameter cuts the	Root
thread form, when the thread form width and groove	The inner most surface of the thread, connecting the
depth are equal, applies to parallel/straight threads	flanks.
forms only.
	Crest
Helix Angle: (Parallel/Straight Thread Forms)	The outer most surface of the thread, connecting the
Where the lead of the thread and the pitch diameter	flanks.

cylinder form a right angle triangle. The helix angle is the angle opposite the lead.

Helix Angle

πxD

π x Pitch Diameter

D = Pitch/Effected Diameter P P = Pitch or Lead φ = Helix Angle

Каталог Stellram токарный инструмент - страница 249