388 Каталог KORLOY 2020 Инструмент и оснастка для станков по металлу Стр.D4

Каталог KORLOY 2020 Инструмент для станков по металлу Стр. D4 0388 Lab2u

Technical Information for Threading O Thread turning method Thread Inserts & Tool holder Rotation Feed direction Helix method Drawing no. Right Hand Externa EX RH Counter clockwise Towards chuck Regular HI EX LH Clockwise From chuck Reversed Right Hand Internal IN LH Counter clockwise Towards chuck Regular HI IN LH Clockwise From chuck Reversed Left Hand External EX LH Clockwise Towards chuck Regular HI EX RH Counter clockwise From chuck Reversed Left Hand Internal IN LH Clockwise Towards chuck Regular IN RH Counter clockwise From chuck Reversed External RH thread External LH thread ’ k u B Internal RH thread Internal LH thread pk ) tj - O Calculating the helix angle (p) The helix angle is calculated by the following formula: P x N p = tan-1 ix D .L p: Helix angle (°) P: Pitch (mm) N: No. of starts D: Pitch diameter (mm) Lead = P x N The helix angle can also be found from the diagram below Threading Helix angle diagram Feed towards the chuck Standard // helix angle 1.5° Standard toolholder pocket angle Shim i angle Feed towards the tailstock Reversed -ft helix angle v 1.5 Standard toolholder pocket angle Shim angle The dimension H1 (cutting edge height) remains constant with every insert/ shim combination a p to r=-c & Pitch P mm 12 11 10 9 8 7 6 5 4 3 2 1 -0 1 2 3 4 5 6 7 8 9 10 11 12- Pitch P / / f / Sr eci£ I h / / Toolholders 7 / / // / / / / / / / / // / / / / V / / / // 7 / // / / >/ / '/ s' )0 5 0 10 0 150 2C \ \ \ \ \ \ \ \ s )eci )l T aolh Ide rs \ = -2 For Multi-start threads, use the lead value instead of the pitch 4