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THREAd TURNING - step by step EXAMPLE

E

Application:

Thread: External Right Hand ISO MetricM40x2,5

Material: 4140 (25HRc)

Roscagem - Exemplo passo-a-passo | Roscado - Ejemplo paso a paso

E

5 - Choose the Correct Anvil

Anvil choosen: EA16

1 - Choose the Thread Working Method

6 - Choose the Carbide Grade and Cutting Speed

Feed direction towards the chuck was choosen. Therefore, an external right hand insert and an external right hand holder will be used.

Carbide grade choosen: PH6920 Cutting Speed: 140 m/min

2 - Choose the Insert Size

7 - Determine the Number of Passes

Number of passes; 10 ISO External

3 - Choose the Toolholder

Summary

Thread TypeISO M40x2,5 External Right Hand
1Feed Direction:Towards the chuck
2Insert and Grade:16ER 2,5ISO PH6920
3Toolholder:SXANR 2525 M16
4Helix Angle:1,5º
5Anvil:EA16
6Cutting Speed:140 m/min
7Number of Passes;14

4 - Find the Helix Angle

2,5mm (10 tpi) and a workpiece diameter of 40mm (1,57”), we find the helix angle to be 1,5º