Каталог Stellram токарный инструмент - страница 246

Anvil Selection

With the Stellram threading system, a wide range of

thread helix angles can be obtained without changing or

modifying toolholders. This is obtained by simply

changing the carbide anvil. β

Most toolholders are produced with 1.5° helix machined

into the body. These tools are supplied with this angle

as standard.

Interchangeable anvils allow helix variations between

+4.5° and -1.5° with the insert cutting edge remaining

constant. β

Negative helix angles are used for producing right hand

threads with left hand holders or left hand threads with

right hand holders.

1.5° Standard

1.5° Standard

Negative Helix

Note: Standard toolholders are supplied with 1.5° helix angle as standard.

Calculation of thread helix angle for a given thread Helix angle - Tan-1 u = Lead of the Thread Pitch/Effective Diameter x π